douglas elementary school douglas middle … 50-percent...massachusetts school building authority...

Massachusetts School Building Authority Project Nº: 200800770010 / 200800770100G 15 August 2011 50% Construction Document Submission – Douglas Elementary School / Middle School

D O U G L A S E L E M E N T A R Y S C H O O L

D O U G L A S M I D D L E S C H O O L M A S S A C H U S E T T S S C H O O L B U I L D I N G A U T H O R I T Y

5 0 % C O N S T R U C T I O N D O C U M E N T S U B M I S S I O N

P A R T F O U R : B U I L D I N G D E S I G N

• B A S I S F O R D E S I G N / N A R R A T I V E S

S Y S T E M S N A R R A T I V E N E W D O U G L A S E L E M E N T A R Y S C H O O L


Methodology The narrative is organized according Uniformat II, Level 3 Elements, to correlate to the structure of the Schematic Design cost estimate.

Sustainable Design Elements The narrative format describes “Sustainable Elements” which are summarized here. Building Envelope

The exterior cavity wall system consists of veneer masonry and metal wall panels over a metal stud back up system. The wall system has three inches of rigid wall insulation in the cavity over the air and vapor barrier and sheathing, plus two and one half inches of spray foam insulation over the back of the sheathing between the studs. Windows have high performance “low e” argon filled glazing air, and gym clerestory windows have translucent insulating glazing units which diffuse the daylighting deep into the room. The roof system includes a highly reflective (“coolroof”) PVC membrane adhered to rigid tapered insulation having an average thickness of four inches. These elements in total result in a building envelope with high thermal performance and which maximizes daylighting.

Interior Finishes Interior finishes were selected with long life and low maintenance a paramount consideration. Corridor, classroom and cafeteria floors are sheet linoleum, a low maintenance “green” product. Glazed porcelain tile units are used as a wall wainscot in the main corridors (over metal stud and drywall partitions) which results in a wall finish that will last the life of the building. High traffic/high abuse areas such as stairwells, the kitchen and gym have walls of painted concrete block, and student toilet rooms have ceramic tile floors and wainscots, and FRP clad upper walls.

MEP Systems Low flow plumbing fixtures are anticipated to reduce water use by 30%, and hot water piping will be routed to eliminate “dead legs” which saves water and energy. The HVAC system will employ multiple rooftop units with energy recovery (which allow for multiple zones for off-hour use), induction ventilation (“chilled beam”) in classrooms, which reduces both installation and operation costs, and high efficiency (82-86%) “improved” cast iron boilers. Lighting is highly efficient with most areas using pendant direct / indirect fixtures with super T8 lamps. All perimeter spaces will include “daylight harvesting” controls, which dim lighting to take advantage of available daylight, in addition to occupancy sensors.



Site The project has been designed to work with the existing steep terrain to the extent practicable to minimize site work. The site design has been developed to minimize impact on the adjacent wetlands. Stormwater Best Management Practices (BMPs) are designed to maintain the existing site drainage patterns and site hydrology to avoid wetland and water resource impacts. The Stormwater BMPs include underground chambers that receive roof and pavement runoff to control the rate of runoff and recharge groundwater resources. Parking and roadway collection system includes deep sump catch basins for pretreatment and particle separator units for water quality control. Other stormwater controls include a water quality swale, surface and underground detention basins, diversion swales and level spreader outlet systems and a plunge pool outlet. A rainwater harvesting Cistern System is proposed as part of the roof drain stormwater system for the new building to be utilized for site irrigation purposes.



STRUCTURAL Foley Buhl Roberts & Associates, Inc. (FBRA) is collaborating with DiNisco Design Partnership (DDP) in the design of the New Elementary School for the Town of Douglas, Massachusetts. The design of the new school is based on the Fort Banks Elementary School (an MSBA Model School), constructed in Winthrop, MA in 2000. Modifications have been made to the Fort Banks Elementary School design to accommodate a sloping site, new building codes, enrollment projections and other requirements. The purpose of this narrative is to summarize the basis of the structural design, describe the primary structural systems and to provide structural quantities and materials specifications to be used in the preparation of the Schematic Design cost estimate. The New Elementary School will be designed and constructed under the provisions of the Massachusetts State Building Code (780 CMR – Eighth Edition).

STRUCTURAL – GENERAL DESCRIPTION The proposed, three-story building will be constructed along the north side of the present, upper and lower athletic fields, between the existing Elementary and Intermediate Schools. The footprint of the new building will straddle the upper and lower fields, which are separated by a 20+/- feet high fill slope, running in the north-south direction. Program elements at the First Floor of the new school include a Mechanical Room at the west end (below grade and underneath the Gymnasium), the Kitchen and Cafeteria, an Art Room, a Music Room and the Media Center (all in the central section) and Administrative Offices at the east end. The floor of the Kitchen, Cafeteria, Media Center and the Mechanical Room will be two feet lower than the entry level; internal ramps will be provided between levels. The Gymnasium is located at the west end of the Second Floor; the balance of this level is dedicated to classroom spaces. The Lobby, elevator and entry stairs are located in the “knuckle” that connects the (west) Gymnasium wing to the central section of the building. Classrooms will be provided throughout the Third Floor level. The roof of the Lobby/Entry space and an outdoor (screened) mechanical area are located at this level, adjacent to the Upper Gymnasium. The roof of the Gymnasium will be a barrel vault form. Outdoor (screened) mechanical areas will be centrally located on the flat roofs of the center and east sections of the building. Vertical circulation in the new school will be provided by an elevator in the Lobby and by three, entry stair towers. An upper level, Entry Walkway will be constructed on the west side of the building, connecting the Second Floor to the (higher) existing, exterior grades. The total area of new facility is approximately 83,000 (gross) square feet. The New Elementary School will be steel framed, for reasons of economy, performance, flexibility and speed of construction. Typical floor construction will be a concrete slab on steel forms, supported by structural steel beams and open web steel bar joists. A concrete slab on composite steel floor deck will be provided at the section of Gymnasium floor over the First Floor Mechanical Room. Flat roof areas at the center and eastern sections of the building will be framed with steel roof deck supported by structural steel beams and open web steel bar joists. A concrete slab on composite steel floor deck will be provided at the exterior mechanical areas at the roof level. The screens surrounding these areas will be structured with horizontal and vertical, galvanized HSS members, braced down to the main roof structure. The barrel vault roof of the Gymnasium will be framed with acoustical steel roof deck supported by structural steel purlins, which span to steel bowstring trusses. Floor and roof steel framing will be surface prepped and be shop primed, except at areas that will be fire protected.



Typical columns will be either rectangular hollow steel tube (HSS) sections or wide flange steel sections. Lateral stability for wind and seismic loads will be provided by steel bracing in each direction. Foundations are expected to be conventional, shallow spread footing construction, per the November 3, 2010 preliminary geotechnical report prepared by Weber Engineering Associates, LLC (WEA); typically bearing on glacial till or on bedrock. First Floor construction will be a concrete slab on grade. Existing utilities within the building footprint will be removed and relocated to accommodate the new construction. Removal of existing fill (as much as 19 feet at the western end of the building) and rock excavation will be required, as summarized in the WEA report. Exterior wall construction will be a mixture of glazing and steel stud cavity wall construction with a brick veneer. Galvanized steel loose lintels will be provided at the heads of typical, punched window openings. Elsewhere, continuous galvanized relieving angles will be provided.

STRUCTURAL - BASIS OF DESIGN

Codes and Design Standards: Building Code: Massachusetts State Building Code (780 CMR) – Eighth Edition. Structural Steel: AISC “Specification for Structural Steel Buildings” and AISC “Code of

Standard Practice”. Concrete: ACI 318 and ACI 301; latest editions.

Design Loads/Parameters: Live Loads: Classrooms (with partition allowance): 70 PSF Corridors: 80 PSF Flexible, Open Plan Areas (Including the Gymnasium): 100 PSF Stairs: 100 PSF Mechanical Equipment Rooms: 150 PSF

Snow Loads: Basic Ground Snow Load (Douglas): 55 PSF

Wind Loads: Basic Wind Speed (Douglas): 100 MPH

Seismic Parameters: Short Period Spectral Response Acceleration(Ss): 0.23 1.0 Sec. Spectral Response Acceleration (S1): 0.064 Seismic Use Group: II Seismic Design Category: C Site Class: D (Preliminary) Structural System: Building Frame System Lateral Load Resisting System: Concentrically Braced Frames

(Not Specifically Detailed for Seismic Resistance) Response Modification Factor (R): 3.0 System Overstrength Factor (Ω0): 3.0 Deflection Amplification Factor (Cd): 3.0



Foundations: The preliminary foundation design is based on an assumed allowable bearing capacity of 6.0 kips per square foot (3.0 TSF) on natural soils (glacial till) or on a 12” thick cushion of compacted structural fill overlying bedrock (to be confirmed by the Geotechnical Engineer).

Construction Classification: The New Elementary School will be classified as Type 2B Construction (Noncombustible, Unprotected). Typical floor and roof steel framing does not require fire protection. All steel framed construction is considered to be restrained.

Sustainable Design Considerations: Sustainable design considerations will be incorporated into the building design; it is intended that the project will be designed to LEED standards or comply with the provisions of the Collaborative for High Performance Schools, Massachusetts High Performance Green School Guidelines: Criteria. No green roof areas are proposed.

A SUBSTRUCTURE A10 Foundations

A preliminary exploration program and assessment of subsurface soil conditions was conducted by Weber Engineering Associates, LLC (WEA). A total of 8 borings, 21 probes and 6 test pits were undertaken at the site within the proposed building footprint, pavement and athletic field areas as described in the Schematic Design Phase geotechnical report prepared by WEA dated November 3, 2010. Available subsurface information from previous projects available to WEA was also reviewed. The native soil conditions at the site consist of sandy glacial till described as fine sand, little silt, trace to little gravel. Cobble and boulder size material, some to 4 feet in the largest dimension, were also observed within the native glacial till deposit. The medium dense to very dense glacial till material was encountered in the explorations taken within the lower field and just east of the elementary school. The surface soil layer observed within the lower field consists of approximately 1-1/2 feet to 4 feet of granular fill. The fill thickens at the demarcation between the upper and lower field and based upon the explorations, it is possible that much of the upper field is comprised of a thick layer of fill except where the fill becomes thinner closest to the existing elementary school. The fill that WEA encountered in the upper field during the recent exploration program contains boulders, wood fragments, a layer of roots and pine needles and soft / loose soil. One of the probes taken within the upper field indicates that the fill can be 19 feet thick. Bedrock is also present at the site and WEA anticipates that it is an uneven surface. Therefore, bedrock can be higher or lower than the elevation depicted on the logs. The bedrock ranges from excellent to highly weathered Gneiss. WEA anticipates that the upper few feet of the highly weathered bedrock can be removed by excavating although blasting or other mechanical methods to break the competent Gneiss will be required. Since the actual depth to bedrock was difficult to interpret, WEA recommends that the depth to refusal encountered within the explorations be interpreted as the bedrock surface unless clearly denoted as boulder. WEA expects that this will provide a conservative estimate for rock excavation.



The native undisturbed glacial till as well as rock is satisfactory bearing material while the fill should not be used for supporting structures. Boulders, some several feet thick, are expected to occur within the natural glacial till and the fill. The depth and location of bedrock is difficult to interpret on site because of the presence of boulders which also produces refusal. We anticipate that the bedrock surface is undulating and bedrock consists of relatively competent gneiss as depicted at boring B-7 (RQD 77%) to relatively poor weathered Gneiss as depicted at test pit TP-30. Constructing foundations and portions of the building within the upper field requires removing the existing fill some to as deep as 19 feet below existing ground surface which is approximately El. 433. Based upon the expected floor grades for buildings within the upper field (El. 435 to 437, gym and cafeteria) we anticipate that most if not all of the fill would be removed in the normal course of constructing the building. The site is not susceptible to liquefaction and we anticipate that the site will be classified no lower than Site Class D. Except for rock excavation, WEA does not anticipate significant premium costs for site work based upon its current understanding of site and project conditions. Imported borrow material will be required for building construction and site grading below pavements and athletic fields. Sustainable design considerations will be incorporated into the foundation design (concrete); it is intended that the new additions will follow the provisions of the Collaborative for High Performance Schools, Massachusetts High Performance Green School Guidelines: Criteria. Preliminary subsurface explorations, consisting of borings, probes and test pits, indicate the presence of fill (of varying depths) overlying medium dense to very dense glacial till. The granular fill layer at the lower field varies from approximately 1½ feet to 4 feet in thickness. The thickness of the fill layer increases at the transition to the upper field, then gradually becomes thinner closer to the existing Elementary School. Fill encountered at the upper field contained boulders, wood fragments, a layer of roots and pine needles and soft/loose soil. The maximum depth of the fill layer at the upper field is approximately 19 feet. The native, glacial till is underlain by bedrock (gneiss), ranging from competent to highly weathered. The actual depth of bedrock was difficult to determine, due to the presence of cobbles and boulders which can also result in boring/probe refusal. Foundations for the new addition will consist of individual spread footings (at columns) and continuous strip footings (at walls). All foundation walls and footings will be cast-in-place, reinforced concrete. The preliminary foundation design is based on an allowable bearing capacity of 6.0 kips per square foot (3.0 TSF) on natural soils (glacial till) or on a 12” thick cushion of compacted structural fill overlying bedrock (to be confirmed by the Geotechnical Engineer). The existing fill layer is not suitable for spread footings or slab on grade construction and will need to be removed within the building footprint. Based on the location and lowest floor elevation of the building, the site topography and the expected subsurface soils conditions, it is anticipated that as much as 19 feet of fill may need to be removed in the western (upper field) portion of the building site. The excavated fill is not suitable for re-use below the building. Rock excavation will also be required in some areas; however, significant premium costs for site work are not currently anticipated. Groundwater was encountered in some locations; depths range from 6.4 to 18.0 feet below the ground surface. Perimeter and underslab drainage will be required at First Floor areas that are constructed below exterior grades (primarily those areas that are two feet lower than the entry level). Perimeter and underslab drainage systems will discharge by gravity. Temporary dewatering will likely be required during construction. The site is not subject to liquefaction and has been preliminarily classified as Site Class D.



Refer to the November 3, 2010 preliminary geotechnical report prepared by Weber Engineering Associates, LLC (WEA) for additional information.

A1010 Standard Foundations • Typical perimeter frost wall: 12” to 16” thick, with a 6” wide masonry shelf with

horizontal and vertical reinforcing each face (4.0+/- psf). The outside surface of perimeter foundation walls should receive a trowelled-on bituminous mastic.

• Typical perimeter frost wall continuous footing: 2ʼ- 4” wide, by 12” deep, with continuous reinforcing bars, plus dowels to the foundation wall (10.0+/- plf). The bottom of the footing will be placed 4ʼ- 0” minimum below the exterior finish grade for frost protection.

• Cantilever retaining walls (at areaways): 14” thick, with horizontal and vertical reinforcing each face (8.0 +/- psf).

• Cantilever retaining wall continuous footing (at areaways): 7ʼ- 6” wide, by 1ʼ-8” deep, with 8.0 psf reinforcing. The bottom of the footing will be 4ʼ-0” below the exterior finished grade.

• Typical, average interior column footings:7ʼ- 0” x 7ʼ- 0” x 2ʼ- 0” deep, with 350 pounds of reinforcing. The bottom of the footing will be approximately 3ʼ- 0” below the First Floor slab on grade.

• Typical, average perimeter column footings: 4ʼ- 6” x 4ʼ- 6” x 1ʼ- 6” deep, with 125 pounds of reinforcing. The bottom of the footing will be approximately 4ʼ-6” below the exterior finish grade.

• Typical Piers/pilasters at interior/perimeter columns: 20 inches square, reinforced concrete with 35 plf reinforcing.

• Anchor Bolts: Anchor bolts at column base plates shall conform to ASTM F1554 – Grade 36 and shall be headed type. Provide a minimum of four (4), ¾” diameter anchor bolts at all columns; additional bolts and/or larger diameter bolts will be required at bracing locations.

A1020 Special Foundation Conditions • Elevator pits: Elevator pit construction will consist of 12” thick, reinforced

concrete walls and an 24” thick, reinforced concrete foundation mat, with an integral sump pit. Waterstops will be provided at all construction joints and all interior surfaces of the elevator pit will be waterproofed. Elevator shaft walls will be 100% solid grouted, reinforced CMU construction (8” thick).

A1030 Slabs On Grade First Floor Construction will typically be a 5” thick concrete slab on grade, reinforced with welded wire fabric. The slab will be underlain by a vapor barrier, rigid insulation and 6” of compacted gravel fill. Saw cut control joints (1.25” deep) will be provided in each direction at each column line. Full depth isolation joints will be constructed around columns. The Mechanical Room floor will be similar construction, with a 6” thick concrete slab on grade. Perimeter and underslab drainage will be provided at all lowered First Floor areas, as previously noted. Provide a 12” thick layer of compacted drainage fill in all areas with underslab drainage. • Welded wire fabric for slabs on grade: 6x6-W2.9xW2.9.



• Slab On Grade Thermal Insulation: R=5 extruded polystyrene foamed plastic board.

• Slab On Grade Vapor Retarder: ASTM E1745 Standard for Specification for Water Vapor Retarders Used In Contact With Soil or Granular Fill Under Concrete Slabs; Class A.

A20 Below Grade Construction B2020 Foundation Walls

• Full height foundation walls (Mechanical Room): 12” thick, with horizontal and vertical reinforcing each face (5.5+/- psf).

• Typical, foundation wall continuous footing: 2ʼ- 4” wide, by 12” deep, with 2 - #5 continuous bars and dowels to the foundation wall. The bottom of the footing will typically be 2ʼ-0” below the First Floor slab on grade.

• Foundation Wall Dampproofing: ASTM D1227 Standard Specification for Emulsified Asphalt Used as a Protective Coating for Roofing; Type II , Class I, non-asbestos fibers.



B SHELL B10 Superstructure

Structural Bays/Spans: The typical bay in the center, classroom section is rectangular, measuring 27ʼ-0” in the east-west direction and 18ʼ-0” in the north-south direction. Two columns will be transferred at the Second Floor level, over the Cafeteria below. The structural grid for the east section will be similar. At the Gymnasium, side wall columns are spaced at 11ʼ-0” o.c. Roof trusses clear span nearly 60 feet over the Gymnasium floor below. Refer to the Schematic Design Architectural Drawings for additional information. Story Heights: The preliminary story height for the upper levels of the central and eastern (classroom) sections has been established at 13ʼ-4”, which is consistent with brick coursing. At the First Floor, the typical story height is 16ʼ-4”; this increases to 18ʼ-4” at the aforementioned, lowered sections. Refer to the Schematic Design Architectural Drawings for additional information. Steel Framing Connections: Type 2 simple framing connections (shear only); double clip angles typically. Columns: Typical columns will be rectangular steel tube (HSS) sections or wide flange steel sections. Lateral Force Resisting System: Lateral (wind and seismic) forces will be resisted by steel bracing, for reasons of economy, stiffness, reduced structural depth and smaller column sizes. Bracing members will be square or rectangular HSS sections. Brace configurations may include chevrons, inverted chevrons (“V”), or single diagonals in short bays, as required by architectural considerations. Expansion (Seismic) Joints: An expansion joint will be provided along the northeast exterior wall of the Gymnasium, separating it from the central and eastern sections of the building. Fire Protection: As previously noted, building is classified at Type 2B Construction (Noncombustible, Unprotected). The building will be fully sprinklered. Typical floor and roof steel framing does not require fire protection. All steel framed construction is considered to be restrained.



B1010 Floor Construction Second Floor and Third Floor Construction (Classrooms and Partial Gymnasium Floors) consists of a 3 -7/16” (minimum) thick, normal weight concrete topping slab with welded wire fabric on 9/16” deep, 26 gauge galvanized steel form deck (4” minimum total slab thickness), supported by 22” deep, open web steel bar joists spaced at 3ʼ-0” o.c. Steel bar joists span 27ʼ-0” to 18” deep, wide flange steel girders. The steel girders, in turn, span 18ʼ-0” to HSS (tubular) steel columns. Standard camber will be provided for open web steel bar joists; topping slabs on steel form deck will be placed at the required elevation, adding concrete to compensate for the deflection of the (unshored) steel framing. As stiffness and vibration is a special concern for the Gymnasium floor construction over the First Floor Mechanical Room, this section of the Second Floor will be framed with a 4” (minimum) deep, regular weight concrete topping slab on a 2” deep, 20 gauge, composite type galvanized steel floor deck (6” minimum total slab thickness), spanning 7ʼ-6” to composite, wide flange steel beams. Steel beams span 22ʼ-0” to composite, wide flange steel girders, which span 20ʼ-0” to HSS steel columns. Composite action between the steel beams/girders and the concrete slab on steel deck will be achieved by field welding ¾” diameter, 4½” long headed shear connectors to the top flanges. • Welded wire fabric for slabs on steel form deck and slabs on composite

steel deck: 6x6-W2.9xW2.9. • The estimated total weight of structural steel for the First and Second Floor

levels of the new building; including beams, columns, bracing, plates, angles, miscellaneous frames, connections, etc., but excluding equipment screens, entry canopies, loose lintels, etc. is as follows: Structural Steel Beams and HSS/WF Columns: 280.0 Tons

• The estimated total weight of open web steel bar joists and accessories is as follows: Open Web Steel Bar Joists and Accessories: 70.0 Tons

B1020 Roof Construction Flat Roof Construction (Classrooms) consists of a 1½” deep, 20 gauge, Type WR, galvanized steel roof deck, supported by 22” deep, open web steel bar joists spaced at 4ʼ-6” o.c. Steel bar joists span 27ʼ-0” to wide flange steel girders (14” to 18” deep). The steel girders, in turn, span 18ʼ-0” to HSS (tubular) steel columns. Standard camber will be provided for open web steel bar joists. As noise and vibration is a concern at roof top mechanical equipment areas, these sections of the roof will be framed with a 3½” (minimum) deep, regular weight concrete topping slab on a 1½” deep, 20 gauge, composite type galvanized steel floor deck (5” minimum total slab thickness) spanning 4ʼ-6” to composite, wide flange steel beams. Steel beams will span 27ʼ-0” to composite, wide flange steel girders. Composite action between the steel beams/girders and the concrete slab on steel deck will be achieved by field welding ¾” diameter, 3½” long headed shear connectors to the top flanges. Acoustical screens will be provided around all roof top mechanical units. Roof drainage will be achieved by pitching the steel framing to low points at selected interior columns, wherever practical.



Gymnasium Roof Construction consists of a 3” deep, 18/20 gauge, galvanized, cellular acoustic deck, spanning 11ʼ-0” to structural steel bowstring trusses. Trusses clear span the Gymnasium floor below (60 feet) and are supported by HSS steel columns. Steel framing for the Gymnasium roof will be Architecturally Exposed Structural Steel (A.E.S.S.). • Welded wire fabric for slabs on composite steel deck: 6x6-W2.9xW2.9. • The estimated total weight of structural steel for the various roof areas of

the new building; including beams, columns, trusses, bracing, plates, angles, miscellaneous frames, connections, etc., but excluding equipment screens, entry canopies, loose lintels, etc. is as follows: Structural Steel Beams and HSS Columns: 150.0Tons

Structural Steel Bowstring Trusses: 25.0 Tons

• The estimated total weight of open web steel bar joists and accessories is as follows: Open Web Steel Bar Joists and Accessories: 20.0 Tons

B20 Exterior Enclosure

B2010 Exterior Walls Exterior walls for new building will be a mixture of glazing and steel stud/brick veneer cavity wall construction. Galvanized steel loose lintels will be provided at the heads of typical, punched window openings. Elsewhere, continuous galvanized relieving angles will be provided. Refer to the Schematic Design Architectural documents for additional information. Horizontal steel girts (8 x 8 HSS sections) will be provided at two intermediate levels between the Gymnasium floor and roof, to reduce the span of the exterior wall steel stud backup. The steel stud backup will be 16 gauge minimum studs, designed for an H/600 deflection limitation. Vertical slip joints will be provided in the metal stud backup system at each level. Ties to the brick veneer will be installed at 16” o.c. horizontally and vertically.

Mechanical Area and Kitchen Area Walls 8” reinforced concrete cast-in-place wall, continuous air and vapor barrier (A&VB), 3” rigid insulation, 1” air space, with 4” masonry veneer system (brick and ground face CMU, see exterior elevations, typical). Interior face of wall epoxy painted.

Retaining Wall At gymnasium wing, concrete retaining wall (See A20 – Below Grade Construction) with membrane waterproofing, drainage plane/protection board, 3 inch rigid insulation, and footing drain (perforated PVC in stone trench wrapped with geotextile fabric). Interior of surfaces retaining wall in mechanical area shall receive epoxy paint. In finished rooms, retaining wall shall receive Z furring @ 16” o.c., moisture resistant GWB and paint.



Gym Wall Lower walls 8” reinforced concrete block backup to 14ʼ AFF with epoxy paint at interior. From 14ʼ AFF to sill of clerestory, upper wall backup is 6” metal studs at 16” o.c. with 1/2” Dense glass sheathing and 2” fibrous wood fiber panels (“Tectum”), painted at interior. Continuous A&VB over CMU and sheathing with 3” rigid wall insulation, 1" air space and 4” masonry veneer system.

Stairs (at ends of main corridor) 6” metal stud framing 16” o.c. with 1/2” dens glass sheathing, continuous A&VB with 3” rigid wall insulation, 1” air space, and 4” masonry veneer system. Interior face of wall shall have epoxy paint. Vestibule shall be window wall system (See B2020 Exterior Windows for more detail).

Classrooms, Cafeteria/Stage, IMC and Administration Areas 6” metal studs at 16” o.c. with 1/2” Dense glass sheeting, continuous A&VB, 3” rigid insulation, 1” air space, with 4” masonry veneer system (see elevations for locations). Stud spaces to receive 2 1/2” spray foam insulation on room side of sheathing, typical.

Equipment Screens Galvanized structural tube columns with horizontal tube sections at top of screen wall and 8” above the roof, with zee girts installed vertically at 4ʼ-0” o.c. between top and bottom structural tubes. Exterior screen panels shall be .050 prefinished concealed fastener aluminum panel with 12” face (Centria “Econolap” 1-½” thick). Back (equipment) side of screen to be prefinished aluminum Centria “econo Lap” 1/8” perforated 3/4” 40% open staggered hole with sound dampening insulation exposed fastener system. Top of screen wall 8' above roof elevation. See Roof Plan for locations where metal stud/veneer masonry parapets serve as equipment screens.

Sun Control Devices Shade: EFCO E-Shade 36” rectangular, 2 ½” deep, 6063-T6 aluminum

prefinished, Aluminum with screw spline construction. Light Shelf: EFCO E-Lite 6063-T6 prefinished aluminum with screw spline

construction. Panel Material 1 – B2010 Exterior Walls

6” metal stud framing 16” o.c. with ½” dens glass sheathing, continuous A&VB with 3” rigid wall insulation, 1” air space, and 4” masonry reinforced stack bond veneer system. Interior face of wall shall have paint. (Alternate:) 6” NBK architectural ceramic tile – Terrart “Large: rain screen 12” x 60” natural finish “Siena” on aluminum rainscreen girt support system.



Panel Material 2 – B2010 Exterior Walls 6” metal stud framing 16” o.c. with ½” dens glass sheathing, continous A&VB with 3” rigid wall insulation, 1” air space, and 4” masonry veneer system. Interior face of wall shall have paint.

(Alternate:) Centria – Formawall Graphix Series 3” vertical flat R21, backface and 22 GA. Exterior face aluminum – smooth flat, ½” RVL, vertical double tongue + groove 1/8” NOM.

Panel Material 3 – B2010 Exterior Walls 6” metal stud framing 16” o.c. with ½” dens glass sheathing, continuous A&VB with 3” rigid wall insulation, 1” air space, and 8x16 scored ground face CMU veneer system. Interior face of wall shall have paint. (Alternate:) VM Zinc – Pigemento Series on 9/16 thick “cemsteel” cementitious and galvanized metal sheathing furred of metal exterior wall system with 7/8” galvanized girts and furring channels rainscreen system.

Panel Material 4 UNA CLAD: UC-500 flush panel 1” deep Rheinzink finish and 12” panel width,

24 gal. on 6” metal stud back-up, ½” dens glass, A&VB with 3” rigid insulation.; rheinzink Euro-Norm, standard Din EN 988.

(Alternate:) 6” metal stud framing 16” o.c. with ½” dens glass sheathing, continuous A&VB with 3” rigid wall insulation, 1” air space, and Arris-Clip renaissance system 12x24 tiles by Arriscraft. Interior face of wall shall have paint.

Exterior Soffits

UNA CLAD: UC-500 flush panel 1” deep rheinzink finish and 12” panel width, 24 gal. aluminum prefinished aluminum (where noted) 20 year Hylar 5000; rheinzink Euro-Norm, standard Din EN 988.

Exterior Fascias Natural Metal

Rheinzink flat seam, gladdine, Euro-norm, standard Din EN 988.



B2020 Exterior Windows

All window systems shall be thermally broken prefinished aluminum with 1” insulated Argon filled Low E glass unless otherwise specified. Gym Clerestory

Strip clerestory, 6ʼ high, constructed of 4 1/2 inch deep fixed windows (EFCO 2900 series) having 1” insulated low E glass and 1” translucent glass (“Solera” by Advanced Glazing, Ltd.)– see elevations for locations. Assume prefinished aluminum sills and prefinished aluminum head and column trim panning.

Cafeteria / IMC / Corridor 1A 9” curtainwall system (EFCO 5900 series) with inserted 2 1/2” operable windows, all with 1” low E glass.

Project Area Windows + Vents in curtain wall. 4 1/2” deep window system (EFCO 2900 series) with fixed and operable lights, low E glass.

Entry Vestibules 4 1/2” fixed window wall system (EFCO 2900 series) with low E glass.

Stair Towers / Lobby / Kitchen / Corridors 6” curtainwall (EFCO 5600 series) with low E glass.

B2030 Exterior Doors Main Entry Doors: Doors at vestibules are prefinished aluminum medium stile with

tempered insulated glass. Interior vestibule doors same as exterior, but with tempered 45 minute fire rated safety glass.

Service Doors: 14 gauge galvanized steel frames ASTM A525 for exterior doors and interior doors where noted, and 16 gauge for interior frames. Doors to be fully welded 16 gauge exterior door and 18 gauge for interior doors with 12 gauge closer reinforcement.

Security Doors: Dorma – ESA 400, 3/8” tempered glass, low profile, .125 thick prefinished aluminum, Hylar 5000, automatic operation w/ emergency breakout.

B3010 Roof Coverings Low Slope Roof Areas: Sarnafil reinforced single-ply roof membrane (light colored), with6” average roof insulation and vapor barrier. Tapered insulation as shown on the plans. Sloped Roof Areas: Sarnafil reinforced single-ply roof membrane with applied ribs ("Décor Profile") to simulate standing seams over 6" roof insulation and vapor barrier. All roof edge flashings shall be PVC coated metal compatible with welded roof membrane joints. Fascias, soffits and trim shall be prefinished aluminum. And natural metal as noted. A natural metal gutter and 4” diameter downspouts shall be installed along the low point of sloped roofs.



B3020 Roof Openings Roof Hatches - 3ʼ X 6ʼ, for ships ladder. Smoke Vent – for the top of the elevator shaft; assume a 4ʼx2ʼ motorized control damper activated by the fire alarm system. Vent shaft construction to be 8'x4'x6' high two hour rated shaft wall construction with PVC roof membrane cladding.



C INTERIORS C10 Interior Construction by Room 1. Gym: Floors -

C3020 Wood athletic flooring system, 2 1/4” overall thickness, 15/32” maple on 2 layers 15/32” plywood with resilient pads over vapor barrier. With main and cross court basketball lines and volleyball court lines. Vented rubber base.

Walls – C1010 C3010

8” CMU with epoxy paint to 14ʼ AFF. 2” fibrous wood panels (“Tectum”) painted, on 8” metal studs with batt insulation (at interior walls) from 14ʼ AFF up to underside of deck/clerestory sill.

Ceiling C3030

Steel tube trusses and WF purlins & acoustic roof deck, painted.

2. Cafeteria Floors C3020

Heavy duty sheet linoleum with field installed inlaid pattern (Forbo Marmoeum “Elementary”, 2mm thick, with welded seams), vinyl cove base.

Walls C1010 C3010

5/8” GWB, painted, on 6” metal studs (at interior walls). Wainscott 36” high, plastic laminate on 1/2 particle board with continuous 1X3 natural finish maple trim at top and bottom edges and at 4” o.c. vertically (applied over GWB).

Ceiling C3030

2,000 SF of ATC 24 X 24 inch fiberglass tegular lay in (Armstrong “Optima”) .90 NRC in 15/16 grid (Armstrong “Prelude XL”). Assume 2,000 SF hung GB ceiling, painted “high” and “low” ceiling areas vary (12ʼ low, 14” high)

3. Kitchen Area Floors C3020

Quarry tile, 8 x 8 inch, mud set (including cooler / freezer floors) with QT base. Staff toilet: Ceramic mosaic tile, mudset. Office and dry food storage: VCT, 12 x 12 inch, (Armstrong “Imperial”) with vinyl cove base.

Walls C1010 C3010

8” CMU with epoxy paint.

Ceiling C3030

ATC, 24 x 24 inch with scrubbable face (Armstrong “Clean Room VC”) in 15/16” hot dip galvanized grid (Armstrong “Prelude XL Fire Guard”). Ceiling height 9ʼ-4” AFF (kitchen & toilet room). Office and Dry Food Storage: 24 x 24 inch ATC, tegular (Armstrong “Cortega”) NRC.55, in 15/16 grid (Armstrong “Prelude XL”) ceiling height 9ʼ-4” AFF.



4. Platform Floors

C3020 Wood dance flooring system: 2 1/4” overall thickness, 25/32” maple on 2 layers 15/32” plywood on resilient pads over vapor barrier. Sub floor construction: Concrete slab on grade. Risers consisting of solid maple 18” deep treads and 7” high risers (two treads & three risers) over fire retardant plywood and wood framing.

Walls C1010 C3010

5/8” GWB and 6 inch metal studs with acoustic insulation, painted. Procenium opening and surround maple veneer paneling and hardwood trim furred on metal stud back-up.

Ceiling C3030

Exposed structure, painted, with painted floating corrugated perforated metal ceiling panel installed on rigid fiberglass acoustic board and suspended metal furring 24” o.c. Ceiling height varies.

5. Music/Practice rooms

Floors C3020

Sheet linoleum (Forbo Marmoeum “Elementary”, 2mm thick, with welded seams) with vinyl cove base.

Walls C1010 C3010

5/8” GWB painted, both sides acoustic stud chase wall (two rows 6” metal studs @ 16 in. o.c. with acoustic insulators by Mason Industries installed between every fourth stud (4ʼ-0” o.c.) at 48” o.c. vertically) with acoustic batt insulation.

Ceiling C3030

ATC in “checkerboard” pattern, 50% 24 x 24 inch ATC tegular fiberglass panels, NRC.90, (Armstrong “Optima”) and 50% 24 x 24 inch ATC with scrubbable vinyl face (Armstrong “Clean Room VL”) in 15/16” grid (Armstrong “Prelude XL”). Ceiling height 10ʼ-4” AFF (9ʼ in practice rooms).

6. IMC Floors C3020

Provide heavy duty linoleum flooring sheet goods with welded seams (carry $10/sf allowance)

Walls C1010 C3010

5/8” GWB both sides 6” metal studs @ 16” o.c. with acoustic installation, low VOC painted.

Ceiling C3030

1,000 SF of 24 x 24 ATC tegular edged fiberglass panels NRC.90 (Armstrong “Optima”) in 15/16” grid (Armstrong “Prelude XL”), hung painted GWB and wood ceiling panels. Assume 1,000 SF GWB and 1,000 SF of wood ceiling. Ceiling height varies, 12ʼ – 16ʼ.



7. Toilet Rooms Floors

C3020 Ceramic mosaic tile, mud set, pitched to drains, over WP membrane, all with CT base.

Walls C1010 C3010

1/2” plywood over studs to 4” above ceiling. 4ʼ high ceramic mosaic tile wainscot on cement backer board. 1/2” moisture resistant GWB from wainscot to underside deck. 1/8” fiberglass reinforced plastic panels (Kemlite) on upper walls.

Toilets at Gym Walls

8” CMU with epoxy paint to 9ʼ-0” AFF.

Ceiling C3030

2 x 2 lay in ATC with scrubbable face (Armstrong “Clean Room VL”) in 15/16 hot dip galvanized grid (Armstrong “Prelude XL Fire Guard”). Ceiling height 8'-4" AFF.

8. Stairs Stair Construction C2010 C2020

Steel stringers (C-Channels) and concrete filled steel pans. Guards fabricated from 2 1/2” x 1/2” barstock with 9 gauge wire mesh infill. 1 1/2” steel pipe handrails mounted on guards and walls. Underside of steel pans, stringers, guards and railings painted (no ceiling).

Floors C2020

Rubber tile at intermediate landings and rubber riser/step treads on stairs (Norament 925) with rubber base at walls (not at steel stringers) and landings. Sheet linoleum with field installed inlaid pattern at main floor landings (see corridors).

Walls C2020 5/8” abuse resistant GWB on 6” metal studs at 16” o.c. with epoxy paint. 36” high wainscot of ceramic mosaic tile on 5/8” cement backer board.

Ceilings C3030

Hung GWB ceiling. Low VOC epoxy painted

9. Corridors 1A – 1B

Floors C3020

Stone Source – Porcelain series Heavy duty commercial grade 12 x 24 porcelain glazed.

Walls C1010 C3010

5/8" GWB with paint on 6" metal studs @ 16" o.c. with acoustic insulation . Wainscot, glazed 12x24 porcelain tile 10ʼ height. (see plans for feature finishes)

Ceiling C3030

ATC, 2 x 2 foot tegular edged lay in, Armstrong “Cortega” mineral board (NRC .55) in 15/16” grid (Armstrong “Prelude XL”). Ceiling height 10'-4" AFF with 20% Hung GWB system painted.



10. Corridors

2A-2B / 3A – 3B

Floors C3020

Sheet linoleum with field installed inlaid pattern (Forbo Marmoeum "Elementary", 2mm thick, with welded seams). Glazed CMU base (see wainscot).

Walls C1010 C3010

5/8" GWB with paint on 6" metal studs @ 16" o.c. with acoustic insulation . Wainscot, glazed 4”x8” porcelain tile x 7'-4" height.

Ceiling C3030

ATC, 2 x 2 foot tegular edged lay in, Armstrong “Cortega” mineral board (NRC .55) in 15/16” grid (Armstrong “Prelude XL”). Ceiling height 10'-4" AFF.

11. Classrooms (including Art )

Floors C3020

Sheet linoleum (Forbo "Elementary" without pattern) with 4" vinyl base.

Walls C1010 C3010

5/8” GWB on 8” metal studs at 16” o.c. (at exterior wall), painted. 5/8” GWB both sides 6” metal studs at 16” o.c. with acoustic batts, low VOC painted

Ceilings C3030

2 x 2 ATC tegular, fiberglass panels, NRC .90 (Armstrong “Optima”) in 15/6” grid (Armstrong “Prelude XL”). Ceiling height 10ʼ-8” AFF. Assume 25 LF x 2' wide x 2' high GWB/metal stud soffit along corridor wall for ductwork. (9'-0" AFF). (see RCP & Bldg section)

12. Administration

Floors C3020

Sheet linoleum with field installed inlaid patter (forbo marboleum “elementary, 2mm thick with welded seams) with vinyl base.

Walls C1010 C3010

5/8” GWB both sides 6” metal studs @ 16” o.c. with acoustic installation, low VOC painted

Ceiling C3030

2 x 2 ATC tegular edged (Armstrong “Cortega”) NRC .55, in 15/16 grid (Armstrong “Prelude XL”). Ceiling height 9ʼ-4” AFF.

13. Gym Storage, Electrical and Data Closets

Floors C3020

Low VOC epoxy painted concrete.

Walls C1010 C3010

8” CMU, low VOC painted (when adjacent major space having CMU partitions).

Ceiling C3030

Underside floor deck and structure, low VOC painted. (Underside deck @ 13ʼ-6” AFF).



14. Nurseʼs Suite Floors

C3020 Sheet linoleum with field installed inlaid patter (forbo marboleum “elementary, 2mm thick with welded seams) with vinyl base.

Walls C1010 C3010

5/8” GWB on 8" metal studs (exterior wall) 5/8” GWB both sides, 6” metal studs @ 16” o.c. with acoustic insulation, painted.

Ceiling C3030

2 x 2 ATC tegular edged (Armstrong “Cortega”) NRC .55, in 15/16 grid (Armstrong “Prelude XL”). Ceiling height 9ʼ-4” AFF.

15. Janitor Closet Staff Toilet Rooms

Floors C3020

Ceramic mosaic tiles, thin set

Walls C1010 C3001

5/8” GWB with low VOC epoxy paint. Wainscot-4ʼ-0” high, ceramic mosaic tile on 5/8” cement backer board.

Ceiling C3030

24 x 24 inch ATC with scrubbable surface (Armstrong "Clean Room VL") in 15/16" hot dip galvanized grid (Armstrong "Prelude XL"). Ceiling height 8'-0".

16. Mech/Elec Rooms/ Receiving/ Custodian Elevator Machine Room

Floors C3010

Concrete with low VOC epoxy paint. VCT with vinyl base (office only)

Walls C1010 C3010

8” CMU low VOC painted.

Ceilings C3030

ATC, 24x24 inch tegular edge mineral board NRC .55 (Armstrong "Cortega") on 15/16" grid (Armstrong "Prelude XL") ceiling height 9'- 4" (Office only). 2 hour rated GWB, painted (Elev Machine Room, Emergency Electric Rooms only), underside deck and structure, low VOC painted (all others)

17. Receiving Corridor

Floors C3020

Sheet linoleum (no pattern) with vinyl cove base.

Walls C1010 C3010

8" CMU with low VOC epoxy paint.

Ceiling C3030

ATC, 24x24 inch tegular edge NRC.55 (Armstrong "Cortega") on 15/16" grid (Armstrong "Prelude XL") ceiling height 10'- 4"

18. Entry Vestibules Floors C3010

Entry grate, entry mat



GENERAL C1010 Walls

All wall construction full height to underside deck above. C1020 Interior Doors and Frames

Hollow metal welded frames with typical 4ʼx7ʼ solid core wood doors with low-VOC natural finish. Allowance for sidelights and safety glass in doors. For specific hardware requirements, refer to Room Data Sheets. Generally“ Sargent Signature Series” mortised door locks. Assume aluminum storefront inner door assemblies in main lobby and lower stair vestibule. See B2030 Exterior Doors. At main office counter, motorized security grate (open aluminum "mall grate") fromceiling closing to counter top. Interior aluminum vestibule and doors – EFCO “D502” with 1” insulated glass at exterior glass; fire rated 45 min. safety glass at interior lights. Interior aluminum doors and windows – EFCO 403-NT prefinished aluminum kynar 500 with 3/8” tempered glazing.

C1030 Fittings Markerboards & Tackboards: Painted Steel writing surface on hardboard backing with extruded aluminum frames and chalk tray. Tackboards with linoleum cork (i.e. -Forbo “bulletin board”) covering on hardboard backing (no vinyl covered tackboards for IAQ reasons). See Room Data Sheets for locations. Recycled solid plastic toilet partitions & urinal screens. Stainless Steel grab bars, bathroom accessories such as soap, towel, sanitarynapkin, and toilet paper dispensers, recessed waste bins, mirrors, etc. Exterior building canopy mounted signage (assume 16” high cast aluminum letters:“Douglas Elementary School” at first floor and ground floor canopies). (2 sets) Flag pole: (1) one. Cast Aluminum 35ʼ tall Exterior Column Covers: Una-Clad Series 200 single section, .125 thick, prefinished, custom color, Hylar 5000. Interior Column Covers: Stromberg, GRG high quality glass fiber gypsum reinforced covers ready for field finish. Interior Signage Vandal resistant frame and sign with raised vinyl lettering, integral raster Braille (raised) and removable vinyl insert.



C3010 Floors and Walls Feature wood walls (see plans for locations) Maple veneer paneling and hardwood trim on metal furring. Feature porcelain tile walls (see plans for locations) 4x8 glazed porcelain tile (at 2nd and 3rd floors), 12x24 glazed porcelain tile (at 1st floor) on cement backer board. Mats & Grates: Mats: “Berber” 100% solution dyed UV stabilized polyproylene with 10%

recycled content and rubber backing 3/8” thick. Grates: ADA complaint “Deep recessed dual-track” 1 5/8”

6061-T6 heavy gauge aluminum with grey vinyl scrapping inserts & charcoal nylon dring inserts (see drawings for sizes).



D SERVICES

D10 Conveying D1010 Elevators & Lifts

Holeless hydraulic passenger elevator, 3,500 lb, three floor stops, 100 fpm. Stainless steel doors, frame, and cab interior. Shaft shall be 2 hour reinforced CMU.

D20 Plumbing D2010 Plumbing Fixtures

Number of plumbing fixtures will be added in the facility to accommodate population of 276 male students and 276 female students and shall be in accordance with 248 CMR Paragraph 10.10, Table 1. Plumbing fixtures will be equipped with the following water conserving features (for 30% indoor water use reduction-LEED- WE Credit 3)

Water Closet Urinals Lavatory

Dual Flush Valve (Sloan WES-111, 1.6 gpf up and 1.1 gpf down) Or Electronic sensor 1.28 gpf flush valve (Sloan 8111-1.28)

Electronic sensor ultra low flow flush valve type- 0.25gpf (Sloan WEUS 1002) Or Waterfree Urinals (Sloan WES-1000)

Sloan Optima EAF-275-ISM “Solis” solar powered, sensor activated, hand washing faucet with integral spout temperature mixer, 0.5 gpm flow restricting aerator spray head and field adjustable run time limit setting.

Water closets and urinals will be commercial vitreous china, wall hung (ADA compliant). Lavs will be self-rimming counter mounted china. Each floor includes a janitorʼs closet with a corner mop service basin. Toilet cores on each floor will include alcove-recessed electric water cooler, in a high-low handicapped accessible configuration. Toilet and mechanical room will have a floor drain with trap primer. All classrooms will have self-rimming stainless steel sink with gooseneck type faucets (Chicago#786-GN). Plumbing connecting and faucets will provided to each kitchen appliances requiring plumbing work. Exterior non-freeze wall hydrants will be provided on all side of the school building.

D2020 Domestic Water Distribution New main 4” domestic water supply will enter into the mechanical room and reduced Pressure Backflow Preventer will be provided to the main domestic water supply to protect the service (per the DEP regulation 310 CMR 22). Boiler water feed and make-up, and any other mechanical take-Offs will branch off through a reduced pressure-principle backflow preventer. The domestic cold water piping inside the building will be distributed in “L” type copper tube with wrought or cast copper fittings. The piping will be insulated to prevent condensation.



Two high efficiency (86%) oil fired water heaters with storage tank. (Veissmann Vitola 200, 300 MBH with two 130 Gallon tanks) will be manifold together to supply hot water distribution to classroom fixtures and kitchen appliances. The domestic hot water distribution system will be in re-circulating system to the fixtures, with no dead leg more than 12” in length. There will be 2 different hot water supply / recirculation systems in the building. One system will operate at 140°F and will serve the kitchen dishwasher and 3 compartment sink. The other system will operate at 120°F and will serve the other kitchen sinks and appliances, as well as the custodian room sinks, lavatories and classroom sinks. At the lavatories, the faucets will reduce the temperature to 110°F at the lavatories, and 105°F in the toilet rooms and class rooms sinks. Domestic hot water will be distributed in “L” type copper tube with wrought or cast copper fittings. The hot water (HW),and re-circulating (HWC) piping will be insulated for energy savings. No HW or HWC piping will be concealed beneath the slab.

D2030 Sanitary Waste The 6” sanitary waste system will drain by gravity and will run to exit the building and connect to the new sewer system at the site A dedicated 4” grease waste line will be installed to collect grease laden waste water from the new Kitchen appliances and fixtures. The grease line will exit the building adjacent to the Sanitary Sewer and will be connected to an exterior grease trap outside the building. For culinary sink or prep sinks grease tarp will be provided at the source. Above ground sanitary drainage and will be piped in cast iron with “no-hub” joints.(3” or larger) . Piping smaller than 3 inch will be piped in copper. Piping below floor shall be weight cast iron hub and spigot

D2040 Rain Water Discharge Roof Drain system will carry rain water away from the flat roof of the new building with conventional primary roof drains.. The surface of the roof deck will be drained with dual level promenade drains (a minimum of two) with the lower drain bodies flashed into the waterproofing membrane. RW piping and the system will be sized to handle a rainfall rate of 4 inches per hour, with a total runoff from the main roof and the roof deck of just under 1 cubic foot per second. The storm system will be installed in cast iron piping with all horizontal piping insulated to prevent condensation. The storm system will exit along the side of the building and connect to the site storm water collection system. See G3030 – Storm Sewer for a description of the exterior storm drain system.

D2090 Fuel Fuel source for the domestic hot water heating will be fuel oil #2 and kitchen equipment will be propane gas and electric

Sustainable Design Features: All plumbing fixtures will be equipped with ultra low flow water conserving faucets in order to achieve 30% water reduction of water usage from the base design. To receive maximum LEED credits, following plumbing measures will be considered for further evaluation during design development phase.

• Reduce potable water use for sewage conveyance by storm water harvesting. • Solar thermal water heater.



D30 HVAC

D3010 Energy Supply Energy for the school shall be provided by a 10,000 gallon, #2 heating oil tank, below grade. Tank shall include leak detection monitoring.

D3020 Heat Generating Systems The central plant will consist of two - 2000 MBH oil fired hot water boilers sized at 2/3 capacity each. The boilers will provide hot water for heating to energy recovery units (ERU), roof mounted air handling units RTU-1 and HV-1, and various terminal units throughout the building. The boilers will be controlled in a manner to maximize overall plant efficiency by firing the boilers at the lowest possible hot water temperature based on outdoor temperature. Hot water is distributed throughout the building by two base mounted end suction pumps (one is a full size spare), each controlled by a variable frequency drive.

D3030 Cooling Generating Systems The chilled water plant consists of a 80 ton air cooled chiller. Chilled water is pumped in a primary-secondary system separated by a plate heat exchanger. The chiller uses the “green” refrigerant R-410a.

D3040 Distribution Systems 1. The classrooms are heated, cooled and ventilated by ceiling recessed active

chilled beam units. These chilled beams will be supplied with ventilation air provided by a roof mounted energy recovery unit (ERU). Each space shall be controlled by a wall mounted thermostat.

2. The three ERUs provide tempered ventilation air to classrooms, corridors, and other miscellaneous spaces throughout the building. The first stage of heating is by the VFD-modulated energy wheel. Further heating is achieved through a hot water coil. The first stage of cooling is also through the wheel and further cooling is provided by a direct expansion (DX) condensing unit section. The DX cooling coil also provides dehumidification in conjunction with a wrap-around heat pipe (for reheat).

3. The ERUs operate continuously during occupied hours but only operate during unoccupied hours to provide air for chilled beam units to maintain unoccupied setpoint.

4. The corridors will be heated, cooled, and ventilated in the same manner as the classrooms. The second floor corridor (top floor) will have supplemental heating provided by wall recessed convectors.

5. The cafeteria will be served by a roof mounted air handling unit which provides heating, cooling, and ventilation. Heating is provided by hot water and cooling is accomplished through a DX condensing unit. Fans are controlled by VFDs and operate at 66% of full load until a call for further heating or cooling. Demand controlled ventilation modulates the outdoor airflow from 10% to full outdoor airflow based on readings at the return air carbon dioxide sensor. The unit is also equipped with economizing capability which uses outdoor air for cooling when the outdoor air enthalpy is within an acceptable range.



6. The kitchen hoods are connected to a roof mounted exhaust fan. The fan will run cotinuously during occupied hours. Makeup air is provided by a roof mounted makeup air unit. The unit provides heating with a fully modulating hot water heating unit.

7. Administrative Area (1st floor) – The group of spaces on the first floor which seves school administrative staff is served by a roof mounted air handling unit which provides heating, cooling, and ventilation. Heating is provided by a hot water coil and cooling is accomplished through a DX condensing unit. Demand controlled ventilation modulates the outdoor airflow from 30% to full outdoor airflow based on readings at the return air carbon dioxide sensor. Heating and cooling modulates based on readings at the discharge air temperature sensor. The unit is also equipped with economizing capability which uses outdoor air for cooling when the outdoor air enthalpy is within an acceptable range. Each individual space is served by a variable air volume terminal box (VAV) which consists of a motorized damper and a hot water reheat coil. Each space has a wall mounted thermostat which modulates the damper for precision cooling and the heating coil for heating.

8. The IMC is served by a roof mounted air handling unit which provides heating, cooling, and ventilation. Heating is provided by a hot water coil and cooling is accomplished through a DX condensing unit. Demand controlled ventilation modulates the outdoor airflow from 25% to full outdoor airflow based on readings at the return air carbon dioxide sensor. Heating and cooling modulates based on readings at the discharge air temperature sensor. The unit is also equipped with economizing capability which uses outdoor air for cooling when the outdoor air enthalpy is within an acceptable range.

9. The gymnasium is served by a roof mounted air handling unit which provides heating and ventilation. Heating is provided by hot water. Fans are controlled by VFDs and operate at 66% of full load until a call for further heating or cooling. Demand controlled ventilation modulates the outdoor airflow from 10% to full outdoor airflow based on readings at the return air carbon dioxide sensor. The unit does not provide cooling, but environmental cooling is provided by economizing, which uses outdoor air for cooling when the outdoor air enthalpy is within an acceptable range.

10. The main V/D head end room is cooled by a split DX system. Smaller elec./data rooms are cooled with supply air provided by supply fans through ductwork and diffusers.

11. There are miscellaneous spaces throughout the building that contain convectors, cabinet unit heaters, and finned tube radiation for heating.

12. All entrance vestibules and stairways shall contain ceiling mounted cabinet unit heaters to provide heat to the space.

D3060 Controls & Instrumentation The building shall be controlled by a direct digital control. The DDC System shall be capable of monitoring and controlling all points in the building HVAC system, energy recovery units, boilers, chiller, etc.



D40 Fire Protection D4010 Sprinklers

Building will be served from the new 8” fire service line from the street. Cross connection control shall be provided by use a supervised double check valve assembly backflow preventer on the fire service as it enters the building in a dedicated Fire Pump room adjacent to the exterior building wall. A Fire pump will be provided to meet the pressure and flow requirements of the sprinkler system. The entire building shall be protected throughout with a wet automatic fire suppression system. A fire department Siamese pumper connection will be provided outside the fire pump room. The FDC will either be wall-mount or free-standing, depending on the final details and the preference of the responding Fire Department AHJ. This system shall be designed in accordance with NFPA Standard 13, 2007, the Massachusetts State Building Code, 8th Edition and the town of Douglas Fire Department requirements. Sprinklers shall be supplied from the standpipes. Floor control valve stations, consisting of a monitored shut-off valve, flow switch and an Inspectorʼs test valve and sight glass, shall be provided at each floor take-off from the standpipe system. This shall report sprinkler flow to the fire alarm system on a floor-by-floor basis. Sprinkler heads in electrical and mechanical rooms shall be standard response, 212 degree temperature listing. Sprinklers in all other areas shall be quick response heads.

D4020 Standpipes Standpipes shall be supplied in all required egress stairs. Standpipes would be designed in accordance with NFPA Standard 14, 2007, and Douglas Fire Department requirements. Standpipes shall be located in each required egress stairway, and adjacent to the Stage. Additionally, standpipes shall be located so that no part of the building is more than 200 feet from a standpipe valve. Each standpipe shall be equipped with a 2 1/2” fire department hose valve with 1 1/2” reducer at the stair floor landing. At the Stage, fire department valves shall be provided on each side of the stage. These shall be in recessed cabinets. Because the building is not a high rise, there is no minimum pressure requirement for the standpipes.

D4090 Fire Protection Systems Standpipes & sprinklers shall be supplied from a dedicated water service, entering the building in the fire pump room. The building service shall be equipped with a wet main alarm riser check valve, located at the service entrance. From there, this line would run to each stairways, and then up through the stairways as standpipes. Fire protection piping shall be schedule 40 piping with threaded fittings for any piping sized 2” and less. For sizes over 2”, schedule 10 piping with roll grooved fittings and couplings shall be used. All valves controlling the flow of water shall be equipped with supervisory devices that report to the Fire Alarm system. Kitchen hood will be protected with a dry agent “Ansul R-102” packaged hood suppression system Following hydrant flow test information was obtained from the Douglass town: Static Pressure: 80 psi Residual Pressure: 56 psi Flow: 1180 GPM Based on the above hydrant flow data and the elevation, we feel a fire pump is required for this project.



D50 Electrical D5010 Electrical Service & Distribution

Furnish and install the underground primary electric service conduits from the existing aerial utility primary service. The pad mounted transformer and associated primary electric service cables shall be furnished and installed by the utility company. The primary electric service voltage for the pad mounted transformer will be 13.8 KV and the secondary electric service voltage will be 277/480-volts, 3-phase, 4-wire. Furnish and install the multiple secondary electric service cables from the pad-mounted transformer to the secondary switchboard located in the new electric room. Furnish and install a new 1600-ampere rated main switchboard consisting of a 1600-ampere main breaker and metering section, 277/480-volt feeder section, and a metering cubicle. Furnish and install four meters (main, lighting, HVAC and receptacle) and metering sections in the switchboards. Furnish and install the required 480/277-volt and 208/120-volt normal lighting and power distribution system including transformers, panels and associated feeders in conduit. Furnish and install the required lighting, receptacle, and power panels including associated feeders in conduit. All panels shall be installed in the electric closets provided on each floor of the building. Furnish and install a lighting and receptacle system in each of the areas within the building including all branch circuit wiring from the respective panelboards. Lighting and receptacle branch circuit wiring shall be installed in conduit raceways or shall be type MC metal clad cable in concealed locations. Furnish and install all heating, ventilating, air conditioning, and plumbing power wiring, magnetic starters and disconnect switches. All power wiring shall be installed in conduit. Furnish and install the power wiring in conduit for the elevator. Furnish and install the power wiring in conduit for the fire pump if required. Provide surge suppression protection on switchboard and all distribution panels.

D5020 Lighting & Branch Wiring Lighting design: .75 W per square foot. Occupancy sensors controlled lighting. Classrooms and library - Pendant mounted indirect lighting fixtures. Cafeteria - Pendant mounted indirect lighting fixtures, wall sconces and downlighting. Provide track lighting for stage. Gymnasium - Compact fluorescent high bay lighting fixtures controlled by occupancy sensors and daylighting controls. Offices and conference rooms - 2 x 2 recessed indirect lighting fixtures. All offices and administration areas - pendant mounted, ceiling recessed and wall mounted lighting fixtures. Corridors and stairwells - Wall mounted sconces, Recessed downlights



Lighting occupancy sensors in classrooms, toilets and offices. Occupancy sensors: WattStopper dual technology DT-200. As part of the daylight harvesting system, exterior classrooms and the gymnasium shall be furnished with dimming ballasts, daylighting controls and photocells. WattStopper or approved equal. Conrols: automatic dimming control module WattStopper LCD 101. Photocells WattStopper LS-190C. LEED EA Credit 1 – Optimize Energy Performance. All classrooms and conferences room lighting fixtures shall be furnished with fluorescent dimming ballasts and wall dimmer switches. Advance Mark X or approved equal Electric rooms, mechanical rooms and storage rooms - Surface or pendent mounted lens lighting fixtures. Furnish and install an internally illuminated exit sign system at all paths of egress within the building. Site lighting fixture to meet IES full cut off rating. All site lighting to be controlled by multi-zone programmable time clock. All lighting fixtures in the building including gymnasium shall be controlled by local room switches and a building wide computer based lighting control system by Wattstopper. LEED EQ Credit 6.1 & 6.2 – Controllability of Systems, Perimeter & Non-Perimeter. Building wide lighting control system shall consist of control panel, computerized timeclock, relays, switches, LAN connection, software, etc.

D5030 Communication & Security Fire Alarm System

Furnish and install a complete addressable fire alarm system throughout the addition. The system shall consist of pull stations, smoke detectors, heat detectors, duct detectors, standby batteries and alarm speakers with strobe lights. All fire alarm system wiring shall be installed in conduit or fire alarm type MC metal clad cable in concealed locations. Smoke detectors shall be installed in egress areas including all corridors, stairways, lobbies. Audible/visual alarm notification horn/strobe light units shall be installed in all corridors, stairways, classrooms, conference, lobbies, gymnasium, mechanical spaces and toilets. Manual pull stations shall be installed in paths of egress. The fire alarm control panel is located in the main electric room. The fire alarm system shall be installed in accordance with NFPA 72.

Technology Systems include: Voice/Data/TV System, building-wide WIFI internet access, Cable TV and Video Distribution System, local Gym/music/cafe Sound Systems, Master Clock & PA/Intercom System.



Voice/Data System Voice/data outlets shall be installed in all offices, library, classrooms, gym, Cafetorium, and conference rooms. Voice/data outlets shall be installed at every desk location in all offices. Furnish and install conduits between each floor IDF closet and the MDF closet in the first floor. Provide 10Gb fiber optic cable and multi-pair voice riser cable between each IDF and the MDF. Provide fiber patch panels and voice cross-connect blocks. Furnish and install eight data drops in each classroom. Furnish and install two gang outlet box, plaster ring, 1¼” conduit to nearest accessible ceiling, insulating bushings and pull line for all voice/data outlet locations. If nearby accessible ceiling is not feasible extend conduits to nearest IDF closet. Furnish and install a structured cabling system consisting of all cat 6 voice/data cable, modular jacks, patch panels, wiring blocks, racks, fiber optic cable, fiber patch panels, 2-post open equipment racks, devices plates, outlet boxes, conduit, etc. for a complete and fully functional voice/data/video system. Each classroom, library and conference room shall be wired for wall mounted LCD projectors with multiple short throw projectors, interactive white boards and teacher lectern location. Furnish and install required conduit and wire. Provide 100% wireless coverage in the building. Provide wireless access point ceiling and wall Enclosures at designated locations throughout the building. Provide a cat 6 data outlet for connection of a future Wireless Access Pont at each Enclosure to the building Local Area Network. Provide conduit raceway for future interactive white board in all classrooms. Provide a telephone system in the building including telephone in all classrooms and at all teacher/staff workstations. The telephone system shall be capable of Voice over IP. Provide all head end equipment including a voice mail system sized appropriately for the number of users. Provide telephone handsets in all classrooms, at every desk in offices and in common spaces, such as conference room, library, Cafetorium, and gym.

Video Distribution System Video outlets shall be installed in all offices, gym, library, Cafetorium, classrooms, and conference room. The system shall be digital (Video over IP). Provide digital head end network equipment in the Head End MDF room. Furnish and install all cat 6 cable, devices plates, outlet boxes, conduit, etc. for a complete and fully functional video distribution system.



Furnish and install two gang outlet box, plaster ring, 1¼” conduit to nearest accessible ceiling, insulating bushings and pull line for all cable video outlet locations. If nearby accessible ceiling is not feasible extend conduits to nearest IDF closet. Furnish and install conduits between each floor and the MDF closet in the first floor. Provide insulating bushings and pull lines.

Gymnasium Local Sound System The sound system shall be furnished with an amplifier, compact disk player, wireless microphone transmitter, microphone outlets and an assistive listening system mounted in a sound system rack with a lockable door. Provide speakers, mic jacks and wiring in the gymnasium. The two program channel sound system shall provide for the pickup, amplification and simultaneous reproduction at any single or group of speaker locations. Program sources are compact disc player, and microphones.

Music Room Local Sound System The sound system shall be furnished with an amplifier, recorder compact disk player, wireless microphone transmitter, microphone outlets and an assistive listening system mounted in a sound system rack with a lockable door. Provide speakers, mic jacks and wiring in the room.

Cafetorium Local Sound System The sound system shall be furnished with an amplifier, compact disk player, wireless microphone transmitter, microphone outlets and an assistive listening system mounted in a sound system rack with a lockable door. Provide speakers, mic jacks and wiring in the café and stage. The two program channel sound system shall provide for the pickup, amplification and simultaneous reproduction at any single or group of speaker locations. Program sources are compact disc player, and microphones.

Master and Central Sound System Clock Provide a new master clock system in the building. Secondary clocks shall be installed in all classrooms, offices, admin areas, and in all common spaces such as conference rooms, library, gym and Cafetorium. The master clock shall be located in the MDF room Provide a central sound system with speakers in all classrooms, offices, admin, conference rooms, library, gym, Cafetorium, and corridors. The Central Sound system equipment shall be located in the MDF room. System shall be accessed thru the telephone system via access codes. The Central Sound system shall be interfaced to the Master Clock system for scheduled bell tones.



Security System. Furnish and install a complete security system include magnetic contacts, motion detector, sirens, key pad control pane, conduit and wire. Furnish and install magnetic contacts on all exterior doors. Furnish and install motion detectors in gym, corridors, lobbies and all exterior window rooms. Furnish and install a security camera system including server, color IP cameras with housings, conduit and cat 6 cabling. Furnish and install interior IP cameras at all egress doors and corridors. Furnish and install exterior cameras around the exterior of the building. Furnish and install Ethernet switches with Power over Ethernet (PoE) ports for all IP security cameras. Furnish and install a Network Video Recorder (NVR), Video Management software system, and Client software. The NVR shall be sized for three (3) to four (4) weeks of image storage. Provide a cabinet/rack for the head end equipment to include the NVR, rack-mounted monitor, and a UPS system. Head end equipment shall be located in the MDF. Furnish and install a video/audio door intercom system at the main entry doors to provide for verification of visitors and remote door release from the main office. The system shall include door stations, master stations, and all low voltage cabling and power supplies. Electronic door latch hardware shall be provided by the door vendor. Furnish and install a Card/Proximity Access Control system at the designated door locations. The system shall include Card/Proximity Readers, all low voltage cabling and power supplies, a system server with Management Software system. Electronic door latch hardware and Request to Exit devices shall be provided by the door hardware vendor. Furnish and install a complete conduit system for the security system. Furnish and install all required conduits, outlet boxes, pull lines, plaster rings, junction boxes required for a complete security system.

Classroom Speech Reinforcement System Provide a speech reinforcement system in all classrooms. System to consist of amplifier, IR sensor, speakers and cabling.

Video Presentation Equipment Provide video presentation equipment at all teaching stations including classrooms, SPED rooms, IMC, etc. Equipment to include interactive whiteboards, short throw video projectors, security devices and plat panel monitors.



D5090 Other Electrical Systems

Emergency Electrical Light and Power System Furnish and install an emergency life safety light and power system. The system shall consist of lighting fixtures, exit signs, conduit, wire, auto transfer switch, supervisory relays, two-hour mineral insulated cables, panelboards and cabinets. Life safety emergency lighting shall be installed in accordance MEC Article 700. Life safety emergency system shall serve emergency lighting, exit signs, fire alarm system and fire pump (if required). Designated lighting fixtures in all paths of egress such as corridors, interior classrooms, cafeteria, toilets, library, gymnasium, lobbies and stairwells shall be connected to the emergency lighting system. Also, designated lighting fixtures in the administration offices, toilets, mechanical rooms and electric rooms. Furnish and install an emergency standby power system. The system shall consist of conduit, wire, auto transfer switch, panelboards and cabinets. Emergency standby system shall be installed in accordance MEC Article 702. Standby system shall serve kitchen refrigeration, boilers, boiler pumps, gym and cafeteria AHUs, intrusion security system, and communication systems. Furnish and install a new exterior diesel driven emergency generator in sound attenuating enclosure with double wall sub-base fuel tank, and new ductbank into new main electrical room. New generator located adjacent to the building.

Lighting Occupancy Sensors The occupancy sensor based lighting control system shall ensure that the lighting fixtures are turned off automatically after a reasonable time delay whenever a room or area is vacated. Dual technology sensors shall detect the presence of a person by detecting doppler shifts in transmitted ultrasound and by detecting passive infrared heat changes. Dual technology sensors will be installed in all offices, classrooms, conference rooms, storage rooms, and toilets. A building lighting management system with timeclock capabilities shall be installed to control all lighting in corridors, stairwells, gymnasium and all other areas not covered by occupancy sensors. A design alternative considered as part of the daylight harvesting system is daylighting controls and dimming ballasts shall be installed in all perimeter rooms. The entire lighting control system will be evaluated on a life cycle cost analysis (LCCA) basis. The entire lighting system shall meet all requirements of the State Energy Code.



E EQUIPMENT & FURNISHINGS General Note:

Refer Room Data Sheets for Equipment & Furnishings, which are included as part of the construction cost.

E10 Equipment E1010 Foodservice Equipment

The foodservice program will consist of a full service kitchen and serving area sized to accommodate elementary level students and staff. The new serving area will be a modern double line servery system as traditionally found in this grade level.

Kitchen and Food Preparation Area The facility shall include all the necessary components of a functional kitchen to include a receiving area to be used as a staging point for the breakdown and distribution of delivered goods. Refrigerated rooms for the bulk storage of refrigerated and frozen products are to be offered and sized to accommodate the needs of the facility. Dry goods storage shall also be made available for the keeping of canned, boxed, and other non-refrigerated food items. Food grade storage shelving and dunnage platforms shall be provided for dry goods storage and for storage of disposable items like plastic utensils, foam serving trays, and other paper related items. Food preparation shall take place on stainless steel tables of various sizes and configurations. Tables may be fashioned with sinks, drawers, shelves, and overhead pot storage hooks. Motorized food preparation equipment such as a food slicer, food cutter, and mixer shall be provided. Sizing of this equipment will be based on the scope of food preparation as many purveyors now sell pre-prepared ingredients that are pre-washed and sliced. Cooking shall take place in a central location adjacent to both food storage and preparation. Equipment shall consist of standard pieces such as convection ovens, boiling kettles, braising pans, steamers, and open burner range tops. Adjustments shall be made to cooking equipment to suite the specific menu. The facility will include the necessary ware washing equipment to process ware, pots, trays, and pans. Other support facilities located in or adjacent to the kitchen will include a staff toilets for men and women, a dedicated kitchen slop sink with enough space for the storage of mops, buckets and detergents. A clothes washer and dryer will be provided for the washing of mop heads, aprons, and kitchen hand towels. Typically grouped with this equipment are employee locker accommodations for the storage of personal items like coats, handbags, or shoes.

Serving Area Serving will take place on various counters organized into a linear configurations allowing for orderly and secure serving of food products. Counter are grouped into multiple hot food serving lines that will serve the typical school lunch. These lines shall include the necessary equipment needed to provide the cold side offerings such as fruit, salads, and beverages.



Other serving lines will consist of the alternate hot food line with the ability to serve hot sandwiches, burgers, pizza, and any other alternate hot food items. Each of the lines will funnel into a common area large enough to accommodate the flow of traffic where the transaction is to take place. Counters with tray slides will be provided to accept "Point of Sale" terminals where students can pay with cash or type in a code that is linked to a declining balance pre paid system.

E1020 Institutional Equipment – Refer to Room Data Sheets Audio-Visual Equipment: N/A (Furnishings & Equipment) Platform Curtain: Velour stage curtain on heavy duty cord operated track with valance.

E1030 Vehicular Equipment – NA

E1090 Other Equipment Maintenance Equipment: N/A (Furnishings & Equipment) Unit Kitchens: One each in teacher lunchrooms and Life Skills Room (2` total) Athletic Equipment: – Refer to Gym Room Data Sheets

Motorized basketball backstops (two main court and four side court), wall padding, motorized gym divider curtain, manual bleachers, volleyball inserts, scoreboards, shot clocks, etc.

E20 Furnishings E2010 Fixed Furnishings

Fixed Casework: (Refer to Room Data Sheets) all custom fabricated. Cubbies: Each project area to have custom fabricated

cubiesconstructed of prefinished solid maple and maple veneerplywood.

Classroom Casework: Each full size classroom shall have sink base, wall cabinets and storage cubbies. All cabinets constructed of prefinished solid maple andmaple veneer plywood with plastic laminate countertops.

Main Office: Main office reception counter, work room counters andwall cabinets. Staff mail box cubbies. All casework prefinished solid maple/maple veneer plywood withplastic laminate counter tops.

IMC: Room divider, circulation counter plus 360 LF 36” high custombookcases on outside wall concealing fintube radiation,with grille on top and as shown on the drawings. Work Room base and wall cabinets. All casework prefinished solid maple/maple veneerplywood with plastic laminate counter tops.

Art Room: Modular pre-manufactured wall and base cabinets with epoxy tops as for “science rooms”.

Window Treatment: Perforated (1% opeonness) window shade with chain clutch, bottom rail and fascia.



E2020 Moveable Furnishings – NA Includes furniture & accessories, moveable rugs & mats, etc. which are NOT to be part of the estimated construction cost (F&E).

F SPECIAL CONSTRUCTION & DEMOLITION F10 Special Construction – Not Applicable F1010 Special Structures – Not Applicable F1020 Integrated Construction – Not Applicable F1030 Special Construction Systems – Not Applicable F1040 Special Facilities – Maintain services and egress elements to occupied existing

school building while new building is constructed. F1050 Special Controls & Instrumentation – Not Applicable

F20 Building Demolition F2010 Building Elements Demolition – Not Applicable



G BUILDING SITEWORK G10 Site Preparation G1010 Site Clearing

Strip and stockpile all topsoil within the project area below building and pavement footprint and within the work area.

G1020 Site Demolition and Relocations Demolish existing pavements, fencing and other existing site features as required for the new work.

G1030 Site Earthwork Strip and stockpile all existing topsoil to project subgrade or deeper as necessary within the structure footprint and below pavement areas.

G1040 Hazardous Waste Remediation – Not Applicable

G20 Site Improvements G2010 Roadways

Bituminous Concrete Pavement Vehicular: 1.5” Wearing Course, 2” Base Course, 12” Compacted Gravel Base. Concrete Pavement Vehicular: 9” Reinforced Concrete with #4 rebar @ 12” each way, 12” Compacted Gravel Base, Light Broom finish, expansion joints, spaced at 20 feet maximum, shall have steel slip dowel connectors. Granite Vertical Curb: 6” reveal, saw top spit face granite. Depth and setting to match the Massachusetts Highway Departmentʼs Standards. Cape Cod Berm: 12” wide x 4” high sloped bituminous concrete. Materials and installation per Massachusetts Highway Departmentʼs Standards (MHD).

G2020 Parking Lots Bituminous Concrete Pavement Vehicular: 1.5” Wearing Course, 2” Base Course, 12” Compacted Gravel Base. Granite Vertical Curb: Vertical Granite Curb shall be Vertical Granite Street Curb both straight and curved pieces: 18” Depth of pieces, Lengths and radius of pieces vary. Materials and installation per Massachusetts Highway Departmentʼs Standards (MHD). Specifications and as modified by the Landscape architect.. This is for all granite curbing. 6 inch ht. of exposed curb varies per grading. Cape Cod Berm: 12” wide x 4” high sloped bituminous concrete. Materials and installation per Massachusetts Highway Departmentʼs Standards (MHD). Vehicular Pavement Line Striping: Striping and Handicap Parking Symbols shall meet all applicable requirements of the Massachusetts Highway Department (MHD) and the manual of uniform traffic control devices (MUTCD). Handicap Parking Signage: Metal signs on metal posts, (1) per handicap parking space. Signs shall meet all applicable requirements of the Massachusetts Highway Department (MHD) and the manual of uniform traffic control devices (MUTCD).



G2030 Pedestrian Paving Bituminous Concrete Pavement Pedestrian: 1” Wearing Course, 2” Base Course, 6” Compacted Gravel Base. Concrete Pavement Pedestrian: 4” Reinforced Concrete with WWF 6x6 W2.9 X W2.9, 6” Compacted Gravel Base, Light Broom, sandblast, exposed aggregate finish, expansion joints, spaced at 20 feet maximum, and tooled control joints spaced 4 feet max. Concrete Pavement Pedestrian – Colored and Colored and Stamped: 4” Reinforced Concrete with WWF 6x6 W2.9 X W2.9, 6” Compacted Gravel Base. Integral color by Scofield or approved equal selected from standard colors. Stamped pattern by Bominite, circular granite stone pattern with colored smooth concrete banding. Expansion joints, spaced at 20 feet maximum, and tooled control joints spaced 4 feet max. Detectable Warning Concrete Unit Pavers: Rated for light vehicular loading, 3” (min.) thick pavers, standard size and color to be selected, 1” asphaltic concrete base, neoprene tack coat, 8” Concrete Unit Pavers: Rated for light vehicular loading, 2 3/8” (min.) thick pavers, standard size and color to be selected, 1” asphaltic concrete base, neoprene tack coat, 8” compacted gravel base.

G2040 Site Development Concrete Retaining Walls: For height see drawings, 18” thick, #5 vertical reinforcement @ 9” OC, #4 horizontal reinforcement @ 12” OC. 4000 PSI concrete with expansion joints @ 30ʼ-0” OC max. 3000 PSI concrete footing. #5 rebar @ 9” OC for footing. Metal handrails 3.5ʼ high on top of the wall made with 1.5” O.D. rails. Walls three feet or larger need to be approved by a structural engineer. Footing width 5ʼ deep and 1.5ʼ thick. Concrete Seat Walls: 18” height, 24” thick, reinforced concrete walls with light sandblast finish. Footing to frost depth. Concrete Stairs: Reinforced concrete with a light sandblast finish and with 1.5” OD galvanized Metal Handrails. Stairs shall meet all applicable requirements of the Massachusetts state building code, and the Massachusetts Architectural Access Board (AAB). Concrete Handicap Ramps: The same than Concrete Pavement Pedestrian with Metal Handrails. Handicap Curb Cut Ramps: To be made with Concrete Pavement Pedestrian and detectable warning pavers.

G2050 Site Improvements Trash Receptacles: (6) - Chase Park trash receptacle by landscape forms, side opening, 24” x 40”, surface mounted. Liner: 36 gallon polyethylene, black. Polyester powder coat, standard silver/gray color. Flagpole: 35ʼ high concealed halyard cone-tapered aluminum flagpole of extruded tubing. Ground set and embedded in reinforced concrete foundation. Inside mounted winch. Flagpole to accommodate a 5ʼ x 8ʼ flag at a constant wind speed of 100 MPH. Manufactured by Concord Industries, 214-380-8186.



Metal Benches: (8) – parc vue surface mounted, polyester powder coat, standard silver/gray color by landscape forms. Decorative Stainless Steel Bollards: (8) foot diameter x (3) feet tall with flat top. Attach to footing 12” below surface. Footing to frost depth. Metal Bollards: (8) foot diameter x (42) inches tall painted metal bollard with dome top. Imbed in concrete. Footing to frost depth. Bicycle Racks: (6) - FU2-10 for 10 bicycles, galvanized and powered coated by BRP Enterprises, 888-438-5311. Chain Link Fencing: 10ʼ high vinyl coated. Steep Pipe, PVC coated finish 2.375” OD end, corner, intermediate and gate posts, 1.66” OD top and mid rails. PVC coated helically wound 9 gauge 2” diamond mesh. All post caps, braces, sleeves, ties, clips, stretcher bars, truss rods and other accessories to be vinyl coated. Chain Link Fencing: 4ʼ and 6ʼ high vinyl coated. Steep Pipe, PVC coated finish 2.375” OD end, corner, intermediate and gate posts, 1.66” OD top and mid rails. PVC coated helically wound 9 gauge 2” diamond mesh. All post caps, braces, sleeves, ties, clips, stretcher bars, truss rods and other accessories to be vinyl coated. Baseball Backstop: Steel pipe, PVC coated finish, 4” OD end, corner and line posts and 2” OD horizontal rail and roof members. PVC coated helically wound and woven 2” diamond mesh roof fabric and side fabric, diamond mesh of 9 gauge core wire for roof and 6 gauge for side fabric. All post caps, braces, sleeves, ties, clips, stretcher bars, truss rods and other accessories to be vinyl coated. Aluminum Fencing: 6ʼ high anodized aluminum picket fencing. The posts and rails shall be extruded HS-35 aluminum alloy having minimum yield strength of 35,000 psi. All pickets shall have a minimum yield strength of 25,000 psi. Minimum (3/4) inches x (.050) inches thick. Spacing between pickets shall be a maximum of (4) inches on center. Home Plate and Pitching Rubber: HP-100 Bury All Home Plate and PR-424 movable pitching rubber by Jaypro, 800-243-0533. Basketball Goal and Post: Heavy duty 6” diameter goose-neck pole, heavy duty rectangular backboard and rim # 00176540 with cloth net by Porter, 603-929-4384. Dugout Benches: Provide products which meet or exceed this equipment by Gametime (800) 235-2440 or Equal. Bench: 8 foot bench with back # P1842, bolt-down, with expansion bolts. Frame Color: Dark green powder coat. Seat and Back Color: Dark green PVC Infield Surface: INFIELD SURFACING: Manufactured by Partac Peat Corporation, Kelsey Park, Great Meadow, New Jersey, (908) 637-4191 or Approved Equal. Beam Clay Baseball Diamond Infield Mix, Beam Clay Pitcherʼs Mound Mix and Beam Clay Home Plate Mix, depth as recommended by the manufacturer. Home Plate and Pitching Rubber: Provide products which meets or exceeds the requirements of this equipment by Jaypro (800) 243-0533 or Equal. Home Plate: HP-100 Bury-All Home Plate. Pitching Rubber: PR-424, Movable



Basketball Hoops: (3) hoops by Porter (603) 929-4384 or Equal. Heavy duty Gooseneck Pole – #176, 5-9/16” diameter pole with 6 foot extension. Backboard and Goal - #00176540, rectangular backboard and heavy duty orange rim with tamper proof hardware and cloth net. Playground Surface: Poured in place surface by Surface America, Inc., Contact: PO Box 157, Williamsville, NY 14231; Telephone: (800) 999-0555, (716) 632-8413; Fax: (716) 632-8324; B. Proprietary Products/Systems; Or approved equal. Poured-in-place playground surfacing system, including the following: Polyurethane PlayBound Poured-In-Place Primer, 5” thick PlayBound Poured-in-Place Basemat, ½” PlayBound Poured-In-Place Top Surface (2 colors) over 2” of asphalt binder and 5” of crushed stone. Track Surfacing: Lightning Plexipave System as manufactured by California Products Corporation and distributed by Cape and Islands Tennis and Track, 800-540-3346. Court Patch Binder shall be used to correct any minor surface deficiencies in the Bituminous Concrete Surface. Tack Coat, Plexitac Binder, Rubber Granules (Color to be selected), Plexitrac Coating (Color to be selected), Plexiclor Line Paint, Plexicolor Pigment to be installed as recommended by the supplier. Discus Cage: Provide products which meet or exceed the requirements of this equipment by M-F Athletic Company (800) 556-7464 or Equal. First Place Discus Cage #9976A with (6) 3” curved posts at 13”-1” exposed height, heavy duty weather treated net with pulley system and ground sleeves and caps. Shot Put / Discus Circles: Provide products which meet or exceed the requirements of this equipment by M-F Athletic Company (800) 556-7464 or Equal. Web/Shot/Hammer Circle #9328A galvanized steel web and Web Discus Circle #9329A galvanized steel web. Shot Put Throwing Area Wood Edging: No. 1, 6 x 6 nominal western red cedar. Stone Dust For Shot Put Throwing Area: 6” thick compacted stone dust resulting from the quarrying of bluestone. Set on Marifi filter fabric.

G2060 Landscape Drainage (Multi Purpose and Softball Field): Drainage Blanket: 1ʼ deep.

U.S. Sieve

No.

Minimum

Maximum

3 inch 1 inch

4 10 20 40

100 200 270

100 85 55 35 20 10 0 0 0

100 85 65 45 30 10 5 2

Pea Stone: 3/8” washed pea stone.



Ridged and Perforated PVC Pipe and Fittings: SDR-35. Solid and Perforated Flexible Pipe and Fittings: ADS/Advanced Drainage Systems, 800-821-6710. Filter Fabric: Mirifi #140. Granular Fill: Granular fill as required for fill beneath sports field areas shall be uniformly graded sand or sand and gravel consisting of clean, inert, rounded grains of quartz or other durable rock and free from loam or clay, surface coatings, mica, other deleterious materials with the following gradation.

Percent Passing U.S. Sieve Size # Minimum Maximum

4 inches 100 1 inch 70 100 Number 4 40 100 40 15 50 200 0 15 0.002mm 0 0.5

Tests shall be by combined hydrometer and wet sieving in compliance with ASTM D422. The ratio of the particle size for 70% passing (D70) to the particle size for 20% passing (D10) shall be 8.0 or less. (D70/D20 < 8.0) The saturated hydraulic conductivity of the fill shall not less than 2 inches per hour according to ASTM D5856-95 (2000) when compacted to a minimum of 92% Standard Proctor, ASTM 698. Rigid Pipe: 6” Solid And Perforated PVC Drain Pipe And Fittings. Flexible Pipe: 6” Solid And Perforated Pipe And Fittings Flat Pipe: 12” Advanedge Flat Pipe and Accessories as Manufactured by Advanced Drainage Systems, Inc., 1-800-733-9554.

G2070 Soil Preparation: Topsoil: Existing and stockpiled on site. Coarse Sand: Uniformly graded coarse sand.

U.S. Sieve

No.

Minimum

Maximum

4 10 20 40

100 200

0.002mm clay

100 70 40 15 0 0 0

100 75 40 12 5

0.30



Compost: Stable humus-like material produced from aerobic decomposition of biosolids amended with yard trimmings, agricultural residuals and/or source separated municipal waste. Chemical Fertilizers: As required and recommended by testing laboratory. Subgrade Scarification: Discing, ripping or rototilling 12” deep. Amended Topsoil for Lawns and Sportsfields: 2 part topsoil, 1 part coarse sand, 1 part compost. 12” deep for sportfields, 6” deep for lawns. Amended Topsoil for Plant Backfill Mix: 3 parts topsoil, 1 part course sand and 1 part compost.

G2080 Landscaping All plants shall be specimen quality per the American Standard of Nurserymen Provide amended imported topsoil for backfill mix in all planting pits and beds. Provide a 20 – inch minimum layer for all shrub beds. Provide a 15 - inch layer minimum for all ground cover and bulb beds. Provide imported topsoil for backfill mix 12 minimum around the sides of all root balls. Provide a 12 – inch layer of course sand under the complete bottom of the totally excavated tree pit for drainage and settlement stabilization. Mulching: All planting beds and tree pits shall be mulched with a 2 inch layer of mulch which shall be shredded aged pine bark. Trees: As shown on the drawings. All trees shall be staked and guyed. Shrubs: As shown on the drawings. Groundcovers: As shown on the drawings. Lawns: Seed mix shall be 65% Fescue, 25% Perennial Rye Grass and 10% Annual rye grass. Hydroseed with hydromulch. Sports Field Lawns: Seed mix shall be 20% Fescue, 10% Perennial Rye Grass and 70% Kentucky Bluegrass. Seed with cultipac seeder. Lawn Maintenance: Warranty and replacement 90-day maintenance by the Contractor, 90-day replacement and warranty by the Contractor. The Ownerʼs Maintenance begins at the acceptance of the 90-day Maintenance.

G2090 Irrigation: Provide and underground, automatic irrigation system for the multipurpose field using town water. Provide all necessary water and electrical connections for the irrigation system. The existing well will be used for the upper fields. Provide a new well with the necessary pumps and booster pumps as a water supply for the lower fields. Lawn Maintenance: Warranty and replacement 90-day maintenance by the Contractor, 90-day replacement and warranty by the Contractor. The Ownerʼs Maintenance begins at the acceptance of the 90-day Maintenance.



G30 Site Mechanical Utilities G3010 Water Supply

Water supply for domestic water service and fire protection will be from the existing Town of Douglas water main that extends into the site from Davis Street (Rt. 16) and presently terminates at the south side of the Intermediate School. The existing water service consists of an 8 inch ductile iron main that includes two exterior fire hydrants at the building. The present water services to the Intermediate School Building are located from this 8 inch main to the south side of the building. Under the proposed plan, the existing water service to the Intermediate School Building will be retained. The water main to serve the New School will be an 8 inch ductile iron pipe extended from the end of the existing main to the south side of the school and around to the west side of the school. Domestic water and fire service will be to the Mechanical Room at the south side of the building. Four new external fire hydrants are proposed around the perimeter of the building. The two hydrants at the east side of the building are positioned to also provide improved fire coverage to the Intermediate School. The new 8 inch water main is proposed to be extended from the New Elementary School, approximately 500 feet westerly along the access drive (Gleason Ct.) to the existing water main off the north corner of the existing Elementary School. This will form a loop with the existing water mains to improve water pressure and flow, and eliminate the existing dead ended systems to better serve the project. The new water main location takes into consideration the project phasing such that all portions of the new main installations will be permanent with no need for temporary connections during the project.

G3020 Sanitary Sewer The existing sanitary sewer for the Intermediate School is a single 6 inch cast iron pipe that connects to a small pumping station off the southeast corner of the building. The pumping station discharges via a 4 inch pvc force main over 1600 feet to the municipal sewer system at White Avenue to the north. The Town has recently constructed a new sewer pumping station located on the project site just off the entrance drive at Davis Street. That sewer pumping station has the capacity for the Intermediate School and the New Elementary School and an 8 inch sewer stub was provided for this purpose located at the access driveway. The proposed project will include a new 8 inch pvc gravity sewer to both the existing Intermediate School and the New Elementary School. This will eliminate the existing pumping station and force main now serving the Intermediate School building. The new sewers beyond 10ʼ of the foundation wall shall be constructed of SDR 35 PVC pipe except at shallow applications below vehicular pavement where a minimum of Schedule 80 PVC pipe or equivalent shall be used. The new sewer location takes into consideration the project phasing such that all portions of the new sewer installations will be permanent with no need for temporary connections during the project. See D2030 Sanitary Waste for more information.



G3030 Storm Sewer The Stormwater Management System for the proposed project will be designed to comply with the current Mass. DEP Stormwater Regulations as required and includes the following components: Stormwater Collection System for Exterior Parking, Driveways and Landscaped Areas The stormwater collection system for parking areas and vehicular pavement consists of a curb and gutter system directing runoff to Deep Sump Catch Basins for pre-treatment and a piped drainage system to convey stormwater runoff to the stormwater treatment systems. The stormwater collection system for landscaped areas and non-vehicular pavement will include area drains and catch basins as necessary and a piped drainage system to convey the runoff to the stormwater treatment systems and/ or recharge systems. Roof Drains from the building will be collected in a piped drain system to convey stormwater site drainage system and recharge system. Small portions of the roof that can not enter the internal building drains will discharge via gutters to grade for overland flow to the stormwater collection system. All collection systems will be designed for a minimum 25 year storm capacity with no overflow for up to a 100 year storm. Piping systems will be PVC SDR 35 pipe or HDPE (High Density Polyethylene) pipe except in areas of minimal cover or special load requirements. In those locations, reinforced concrete pipe or ductile iron pipe will be utilized as conditions dictate. For landscape area drains and minimal load requirements, HDPE pipe will be used. To meet the Mass. DEP Stormwater Management Regulations, the site drainage system will discharge to various water quality treatment BMPs, peak flow attenuation BMPs and Stormwater Recharge BMPs selected to best fit into the landscape and considering soils and groundwater conditions, and the characteristics of the receiving wetland resource areas. These are described in the following sections:

Particle Separators These are structural water quality treatment systems designed to meet the water quality discharge standards of the Massachusetts Stormwater Management Regulations. They designed to remove more than 77 percent of the annual total suspended solids load and will also trap floating debris and hydrocarbons such as gasoline and oils. There are several types of these units available that are suitable for this purpose including “Stormceptor”, “CDS Technologys Units” “Downstream Defender” and “Baysaver” to name a few. These treatment units, in combination with the proposed deep sump catch basins, will provide in excess of 80 percent TSS removal to meet the Mass. DEP Stormwater Regulations. Three units are proposed for this project.

Stormwater Detention Systems To meet the requirement to not increase the peak rate of stormwater runoff to the wetlands resource areas, stormwater detention systems are proposed to temporarily store excess stormwater and slowly release it to the outfalls. These include two underground chamber systems, two surface basins and two detention swales.



Underground systems are used where there is lack of space for surface basins and where groundwater depths permit. One under a paved parking lot will be concrete chamber and the one under a play field will be an HDPE plastic chamber system. Surface Detention Basins are vegetated ponding areas that temporarily store water and slowly drain dry following a storm event. They can handle large quantities of stormwater. Detention swales are small, narrow vegetated detention facilities that are positioned along the contour of the land and handle smaller watershed areas.

Subsurface Stormwater Recharger System A stormwater recharge system is proposed to meet the recharge requirements of the Stormwater Management Regulations. This Best Management Practice (BMP) consists of an underground chamber system that will receive runoff from the New Elementary School roof and the driveway and parking areas to the south of that school building. It will infiltrate the runoff into the soil to recharge groundwater resources. It will consist of HDPE arched chambers surrounded in stone and wrapped in filter fabric. It will be located in an area of favorable soils under the proposed play fields to the west of the Intermediate School Building. During severe rain events, the system overflows to the storm drain system. The soils in the areas of the recharge systems are sandy and well suited to recharge facilities.

Infiltration Galley System The infiltration galley system in this case is an underground chamber system, surrounded in stone and filter fabric that is intended to function to recharge stormwater, serve as a water quality BMP and also has a detention function. One system is proposed for this project to receive stormwater from a portion of the proposed new driveway to the southeast of the existing elementary school. This will be an HDPE chamber system.

Water Quality Swale with Sediment Forebay This is a water quality BMP that is designed to remove in excess of 80 percent of the Total Suspended Solids when combined with the pretreatment of Deep Sump Catch Basins and Sediment Forebay. It will receive runoff from the parking area to the west of the existing elementary school that is being modified and enlarged under this project. The treated stormwater will discharge to a level spreader to safely deliver the runoff to the adjacent vegetated terrain. During large storm events, excess flow above the “water quality volume” will bypass the water quality swale and drain to a surface detention basin for flood control.

Plunge Pool and Level Spreaders These are outfall control BMPs that are required in certain situations to lower the velocity of the stormwater discharge to a non-erosive velocity for safe delivery to the receiving area. A plunge pool is a stone basin used where a large quantity of stormwater is flowing down a steep drain system to take the energy out of the flow before discharge to the receiving channel. Level spreaders are discharge BMPs used when there is no defined discharge channel to spread the discharge along the land contour so it discharges at many small discharge points or sheet flows to flow over the existing vegetated terrain. One plunge pool and two level spreaders are included in this project.



G3040 Heating Distribution Not Applicable

G3050 Cooling Distribution Not Applicable

G3060 Fuel Distribution Not Applicable

G3090 Other Site Mechanical Not Applicable



G40 Site Electrical Utilities G4010 Electrical Distribution

Furnish and install the underground primary electric service conduits from the existing utility company manhole. The pad mounted transformer and associated primary electric service cables shall be furnished and installed by the utility company. The primary electric service voltage for the pad mounted transformer will be 13.8 KV and the secondary electric service voltage will be 277/480-volts, 3-phase, 4-wire. Furnish and install the multiple secondary electric service cables in concrete encased schedule 40 conduits from the pad-mounted transformer to the secondary switchboard located in the new electric room.

G4020 Site Lighting See Drawings for locations of all light fixtures. Provide reinforced concrete footings at frost depth for each lighting fixture. Provide all associated trenching, electrical conduit, equipment, and other costs necessary to install proposed lights. Roadway and Parking Lot Light Fixtures – IES Full cutoff fixture on 20ʼ-0” pole. Walkway Light Fixtures - IES Full cutoff fixture on 14ʼ-0” pole. Building mounted lighting fixtures – Building mounted lighting fixture IES full cut off, CFL lamps shall be provided as required at all doors and for building security. Pole mounted and wall mounted exterior lighting fixtures for the entrances to the building shall be controlled by multi-zone programmable time clock (LEED EA Credit 1 – Optimize Energy Performance).

G4030 Site Communications & Security Furnish and install the 4” underground communication service conduits in concrete encased ductbanks from each existing utility company manhole. Typical for telephone, cable TV and fire alarm.

G90 Other Site Construction G9010 Service and Pedestrian Tunnels

Not Applicable

G9020 Other Site Systems & Equipment Not Applicable

S Y S T E M S N A R R A T I V E D O U G L A S M I D D L E S C H O O L


Methodology The Douglas Middle School narrative is organized according Uniformat II, Level 3 Elements.

Sustainable Design Elements The narrative format describes “Sustainable Elements” which are summarized here. Building Envelope

Existing to remain except where noted.

Windows will be retrofitted to have high performance “low e” argon filled glazing, and are “tuned” to their respective solar exposure. The roof system includes a highly reflective (“cool roof”) PVC membrane adhered to rigid tapered insulation having an average thickness of six (6) inches. These elements in total result in a building envelope with higher thermal performance than the current envelope systems..

Interior Finishes Interior finishes were selected with long life and low maintenance a paramount consideration. Most flooring will be long life, low maintenance linoleum flooring with porcelain and quarry tile flooring in the high traffic and high service areas. Existing concrete masonry units is used as wall construction will be painted with low VOC epoxy paint which results in a wall finish that will last the life of the building.

MEP Systems Low flow plumbing fixtures are anticipated to reduce water use by 30%, and hot water piping will be routed to eliminate “dead legs” which saves water and energy. The HVAC system will employ multiple rooftop units with energy recovery (which allow for multiple zones for off-hour use), induction ventilation (“chilled beam”) in classrooms, which reduces both installation and operation costs, and high efficiency condensing boilers. Lighting is highly efficient with most areas using pendant direct / indirect fixtures with super T8 lamps. All perimeter spaces will include “daylight harvesting” controls, which dim lighting to take advantage of available daylight, in addition to occupancy sensors.

Site REFER TO DOUGLAS ELEMENTARY SCHOOL SYSTEMS NARRATIVE.



INTRODUCTION Foley Buhl Roberts & Associates, Inc. (FBRA) is collaborating with DiNisco Design Partnership (DDP) in the modernization and repair of the existing Middle School, located at 21 Davis Street in Douglas, Massachusetts. Structural conditions were observed during a tour of the building on June 15, 2010 and again on December 15, 2010. Original Architectural and Structural Drawings were also reviewed. The purpose of this narrative is to identify and describe the structural systems of the building and to comment on the structural conditions/issues observed. Comments relating to the proposed modernization and repair of the building (governed by provisions of the 2009 International Existing Building Code (IEBC) with Massachusetts Amendments) are presented as well. The following documents were reviewed in the preparation of this Schematic Design Structural Narrative:

Junior – Senior High School (1986): • Structural Drawings S-1 to S-13, prepared by John C. Powers, P.E. dated February

1986. • Architectural Drawings A-1 to A-13, prepared by O.E. Nault & Sons, Inc. Architects,

Worcester, MA, dated February 1986. Additional information was obtained from previous reports and studies (e.g. the 30 March 2001 Facilities Audit and Master Facilities Plan, prepared by C&R / Rizvi, Inc.) and from discussions with school personnel. Exploratory demolition or structural materials testing has not been conducted at this time. A preliminary evaluation of subsurface soils conditions on the site was conducted by the Geotechnical Engineer.

STRUCTURAL – GENERAL DESCRIPTION The Douglas Middle School was constructed in 1986 as a Junior-Senior High School. A new High School was built in 2001 and the building now services grades 3 through 7. The total (gross) floor area is approximately 88,245 square feet, distributed over three levels. As enrollments have been increasing over the years, twelve (12) portable classrooms have been added along the west side of the building. An addition to the Cafeteria was constructed on the south side in 2002 (no construction documents available).

The site slopes downwards from the west to the east; approximately two levels. The main entrance to the school is on the north side of the building, at the Second Floor. The entrance on the west side is at the Third Floor level. The (partial) First Floor of the building is located at grade on the east side.

Typical floor and roof construction is precast, prestressed concrete plank supported by masonry bearing walls and steel framing (in limited areas). Roofs over the larger, Gymnasium and Auditorium/Lobby spaces are steel framed with mansards. Wood framed hip roofs were constructed at the east wing stair towers and the main entrance. Foundations are conventional spread footings.

Exterior walls of the Middle School are brick veneer with a reinforced CMU backup.



STRUCTURAL – BASIS OF DESIGN

The following summary is based on observations at the site, a study of the original construction documents and a review of previous reports, prepared by others. Codes and Design Standards: Building Code: Massachusetts State Building Code – Fourth Edition Structural Materials: Structural specification sections were not available and the referenced Structural Drawings contain minimal information with regard to material strengths. As the building was designed in 1986, FBRA assumes the following minimum strengths are applicable: Concrete: 3,000 psi minimum strength at 28 days Reinforcing Steel: ASTM A615, Grade 40 Precast Concrete: 5,000 psi minimum strength at 28 days Prestressing Steel: ASTM A416, Grade 250K Structural Steel: ASTM A36, Fy = 36 KSI Design Loads: Live Loads: Design live loads are not specifically noted on the Structural Drawings; however, live loads for the precast plank design are specified as follows: Roofs: 35 psf, with a maximum snow drift loading of 105 psf Classrooms, etc. 50 psf Library: 100 psf Corridors: 100 psf Gymnasium: 100 psf Rehearsal Rooms: 100 psf Stage: 150 psf Library/Media Center 150 psf Representative structural calculations suggest that the steel framed roofs of the Gymnasium and Auditorium spaces can support a snow load of at least 40 psf. Note that the State Building Code in effect at the time of construction (Fourth Edition) would have required a minimum 35 psf snow load, plus drifting snow. Wind and Seismic Loads:

Design based on the Massachusetts State Building Code (Fourth Edition) Foundations: The design allowable soil pressure is not noted on the original Structural Drawings. Based on representative calculations, it appears that spread footings have been proportioned on the basis of a 2+/- tons per square foot (TSF) allowable soil bearing pressure.



Fire Resistance: Fire resistance for floor and low roof construction is achieved by the precast, prestressed concrete plank and the masonry bearing walls. The plank likely has a fire resistance rating of 1½ hours to 2 hours, depending on the cover to the reinforcing. Precast plank is supported by structural steel beams and columns in limited locations; sprayed fireproofing has typically been applied to the steel (thickness/rating unknown. Fireproofing of the structural steel is somewhat inconsistent; not all exposed steel framing has been protected (e.g. intermediate steel framing at the Gymnasium and the Auditorium). The steel framed roofs of the Gymnasium and Auditorium spaces are unprotected, as roof framing that is more than 20 feet above the floor below does not need to be rated. However, columns which support this framing do not appear to be protected. There are no sprinklers in the building. A SUBSTRUCTURE

A10 Foundations A preliminary exploration program and assessment of subsurface soil conditions was conducted by Weber Engineering Associates, LLC (WEA). A total of 8 borings, 21 probes and 6 test pits were undertaken at the site within the proposed building footprint, pavement and athletic field areas as described in the Schematic Design Phase geotechnical report prepared by WEA dated November 3, 2010. Available subsurface information from previous projects available to WEA was also reviewed.

The native soil conditions at the site consist of sandy glacial till described as fine sand, little silt, trace to little gravel. Cobble and boulder size material, some to 4 feet in the largest dimension, were also observed within the native glacial till deposit. The medium dense to very dense glacial till material was encountered in the explorations taken within the lower field and just east of the elementary school.

The surface soil layer observed within the lower field consists of approximately 1-1/2 feet to 4 feet of granular fill. The fill thickens at the demarcation between the upper and lower field and based upon the explorations, it is possible that much of the upper field is comprised of a thick layer of fill except where the fill becomes thinner closest to the existing elementary school. The fill that WEA encountered in the upper field during the recent exploration program contains boulders, wood fragments, a layer of roots and pine needles and soft / loose soil. One of the probes taken within the upper field indicates that the fill can be 19 feet thick.

Bedrock is also present at the site and WEA anticipates that it is an uneven surface. Therefore, bedrock can be higher or lower than the elevation depicted on the logs. The bedrock ranges from excellent to highly weathered Gneiss. WEA anticipates that the upper few feet of the highly weathered bedrock can be removed by excavating although blasting or other mechanical methods to break the competent Gneiss will be required. Since the actual depth to bedrock was difficult to interpret, WEA recommends that the depth to refusal encountered within the explorations be interpreted as the bedrock surface unless clearly denoted as boulder. WEA expects that this will provide a conservative estimate for rock excavation.



The native undisturbed glacial till as well as rock is satisfactory bearing material while the fill should not be used for supporting structures. Boulders, some several feet thick, are expected to occur within the natural glacial till and the fill. The depth and location of bedrock is difficult to interpret on site because of the presence of boulders which also produces refusal. We anticipate that the bedrock surface is undulating and bedrock consists of relatively competent gneiss as depicted at boring B-7 (RQD 77%) to relatively poor weathered Gneiss as depicted at test pit TP-30.

Constructing foundations and portions of the building within the upper field requires removing the existing fill some to as deep as 19 feet below existing ground surface which is approximately El. 433. Based upon the expected floor grades for buildings within the upper field (El. 435 to 437, gym and cafeteria) we anticipate that most if not all of the fill would be removed in the normal course of constructing the building.

The site is not susceptible to liquefaction and we anticipate that the site will be classified no lower than Site Class D.

Except for rock excavation, WEA does not anticipate significant premium costs for site work based upon its current understanding of site and project conditions. Imported borrow material will be required for building construction and site grading below pavements and athletic fields.

A1010 Standard Foundations • Foundations are typically continuous strip footings below interior and

perimeter load-bearing masonry walls and individual spread footings at interior column supports. As noted above, footings appear to have been proportioned on the basis of a 2+/- TSF allowable bearing capacity. Given the topography of the site, the building was likely constructed on natural soils in some areas (e.g. the east wing) and on compacted structural fill elsewhere.

• Drainage: The original construction documents indicate that perimeter foundation drainage was provided behind below grade walls. The perimeter drains apparently tie into drainage structures on the site. There is no underslab drainage system.

A1020 Special Foundation Conditions • Elevator Pit: Elevator pit construction consists of 12” thick reinforced

concrete walls supported on a 12” thick reinforced concrete mat. The top of the mat is dampproofed with a trowelled on mastic coating.

A1030 Slabs on Grade • First Floor Construction at the east wing and Second Floor construction other

than that at the east wing is a 4” thick concrete slab on grade, reinforced with welded wire fabric. Third Floor construction at the westernmost section of the building and at the Auditorium is also a 4” thick concrete slab on grade, reinforced with welded wire fabric.

A20 Basement Construction - NONE

A20 Below Grade Construction - NONE



B SHELL B10 Superstructure

Structural Bays/Spans: Bearing walls in the east wing are arranged in a double loaded corridor fashion – precast concrete plank spans 29ʼ-4” clear at the classrooms and 9ʼ-4” clear at the corridor. Typical precast plank spans at the center section vary from 24ʼ-0” to 25ʼ-10” at classrooms and 12ʼ-0” over the corridor. Columns supporting the Gymnasium floor are arranged on a 16ʼ-0” by 20ʼ-0” rectangular grid. Clear spans for the Gymnasium and Auditorium roofs are 80 feet and 64 feet, respectively. Story Heights: Story heights are as follows:

First Floor to Second Floor: 11ʼ-8” Second Floor to Third Floor: 12ʼ-4” Third Floor to Locker Room Roof: 10ʼ-4” Third Floor to Low Roof: 11ʼ-4” Third Floor to Gym Roof (TOS): 24ʼ-4” Third Floor to Auditorium Roof (TOS): 27ʼ-0”

Columns/Bearing Walls: The roof and floor structure is typically supported by 8” reinforced CMU walls. Steel columns are typically 8” wide flange sections. Lateral Force Resistance: As the building was designed in 1986, wind and seismic load resistance requirements in effect at the time (Massachusetts State Building Code – 4th Edition) have been incorporated into the structural design. The Structural Drawings include a certification by the Engineer of Record that the building has been designed to meet the wind and earthquake loading requirements of the Massachusetts State Building Code. Lateral load resistance is typically provided by reinforced masonry shear walls in each direction. Expansion(Seismic) Joints: A single, north-south expansion joint (2” wide) was provided in the building, separating the three-story east (classroom) wing from the balance of the two-story construction to the west.

B1010 Floor Construction Third Floor Construction consists of 10” deep precast, prestressed concrete plank, spanning 18ʼ-4” to 29ʼ-4”, supported by masonry bearing walls (or steel beams in limited locations). The Drawings indicate that there is no concrete topping on the precast floor plank; however, a ½” thick (non-structural) “leveling coat” was apparently applied to even out the irregularities in the concrete plank surface and joints. The composition of this material is unknown; however, the Architectural Drawings suggest that it may be gypsum based. Third Floor construction at the westernmost section of the building and at the Auditorium is a 4” concrete slab on grade, reinforced with welded wire fabric, as noted above. Second Floor Construction at the east (classroom) wing is similar to Third Floor construction, consisting of 10” deep precast, prestressed concrete plank, spanning 18ʼ-4” to 29ʼ-4”, supported by masonry bearing walls (or steel beams in limited locations). The balance of the Second Floor is a 4” concrete slab on grade, reinforced with welded wire fabric, as noted above.



B1020 Roof Construction High Roof Construction at the Gymnasium consists of a 1½” deep, 20 gauge galvanized steel roof deck spanning 5ʼ-4” to 52DLH12 steel joists. The joists span 80 feet in the east-west direction and are supported on exterior masonry bearing walls. Roof construction at the Auditorium is similar, with 1½” deep, 20 gauge galvanized steel roof deck spanning 4ʼ-10” or 4ʼ-11” to 36LH11 steel joists. The joists span 64 feet in the north-south direction and are supported on exterior masonry bearing walls. In each case, end walls parallel to the joist span are braced by a horizontal steel truss that integrates with the steel joist bridging.

Low Roof Construction consists of 8” deep precast, prestressed concrete plank, spanning 17ʼ-0” to 29ʼ-4”, supported by masonry bearing walls (or steel beams in limited locations). Roof drainage is achieved through the use of tapered insulation. Ballasted membrane roofing has been installed at flat roof conditions. Standing seam metal roofing was installed at the mansard sections of the Gymnasium and Auditorium roofs and at the wood framed hip roofs of the east wing stairways and the main entrance. There are two large mechanical units supported on steel dunnage at the low roof.

B20 Exterior Enclosure B2010 Exterior Walls

Exterior Wall Construction consists of a 4” brick veneer (“jumbo” type brick; 4” high x 12” long units) and a 2” wide insulated cavity, with an 8” reinforced CMU backup wall (load-bearing). There are no control joints in the brick veneer. Weep holes have been provided at brick shelves. As most window openings are “punched”, the brick veneer stacks down to the foundation wall – typically, there are no relieving angles.



STRUCTURAL CONDITION/COMMENTS Structural Conditions at the Middle School were reviewed (to the extent possible) on June 15, 2010 and again on December 15,2010. Generally speaking, floor and roof construction appears to be in satisfactory condition. There is no evidence of structural distress that would indicate significantly overstressed, deteriorated or failed structural members. Foundations appear to be performing adequately; there are no signs of significant, total or differential settlements. It appears that floors and roofs have generally been constructed in accordance with the original Structural Drawings. Structural/structurally related conditions observed and/or discussed during the site visits include the following:

1. Areas of distress (depressions, telegraphed cracks, etc.) in the flooring were observed in the corridors of the east (classroom) wing and elsewhere. As previously noted in this report, there is no topping slab on the precast, prestressed concrete plank. A ½” thick “leveling compound” was applied to the plank to level out the surface and prepare it for finished flooring. Due to the relatively thin application of this material, normal anomalies in the plank surface and joints may be telegraphing through. The leveling material may be gypsum based; if so, it would be relatively low strength and subject to deterioration under moist conditions (during routine mopping of floors, tracked in rain/snow during inclement weather, roof leaks, etc.). Several areas of the floor will be opened up for review/inspection and laboratory testing will be conducted on several samples to determine the composition of the material.

2. Cracks in the brick veneer were observed; particularly at building corners. As previously noted in this narrative, there are no control joints in the brick veneer. Accordingly, there is no mechanism to control/relieve the horizontal, volumetric movement of the veneer (expansion and contraction resulting from temperature and moisture fluctuations). Full height vertical cracks have developed at nearly all building corners, due to the uncontrolled expansion and contraction of the veneer. Localized distress to the top of the foundation walls at building corners has also resulted from this condition. Control joints are also missing where the support elevation for the brick veneer changes (e.g. on the south side of the building where the higher, Gymnasium volume continues over the roof of the 6th Grade Science classroom). Vertical cracks have also developed at these locations. Saw cut control joints will be provided at the appropriate intervals (approximately 50 feet on centers) and at conditions where the brick support elevation abruptly changes.

3. As noted earlier in this narrative, a fully insulated cavity was provided between the brick veneer and the reinforced CMU backup wall construction. It does not appear that an adequate drainage cavity exists. Further review and evaluation of the exterior wall construction by the Project Team continues.

4. The expansion joint between the three-story east wing and the balance of the building to the west is open on both the north and south building walls, allowing moisture to enter the building and creating the impression that the building sections are pulling away from each other. The expansion joint will be repaired and properly closed/sealed to prevent future moisture infiltration.



5. Presently, there are no roof leaks; however, there have been a number of roof leaks in the past (the original, ballasted membrane roof remains), damaging ceilings and floors. Localized areas of ponded water were observed at the low roof; the number of roof drains appears to be minimal. FBRA recommends that the condition of the roofing and roof drainage issues be evaluated further by the Project Team. As there are no parapets, significant ponding of rainwater is not an issue.

6. The existing windows and doors are in need of replacement; in some cases, door frames have corroded due to improper grading/drainage at entryway slabs.

RENOVATIONS, ALTERATIONS AND ADDITIONS – GENERAL COMMENTS General comments relating to the modernization and repair of the Middle School are summarized in this section. Renovations, alterations, repairs or upgrades to the building will be governed by provisions of the 2009 International Existing Building Code (IEBC) with Massachusetts Amendments. The Prescriptive Compliance Method (Chapter 3) has been chosen by the Design Team. There will be no change in use and the primary gravity and lateral load resisting systems of the building will essentially remain unchanged. Accordingly, minimal structural investigation and evaluation will be required and seismic upgrades to the building will not be necessary. The relatively low story heights of the Middle School will present a challenge to the Project Team in designing new MEP/FP distribution systems while maintaining acceptable ceiling heights throughout the building. Local alterations to the existing floor and roof structure can be made to accommodate new Architectural and MEP/FP requirements; however, such alterations need to be carefully planned. Modifications to the precast, prestressed concrete floor and roof plank construction is difficult and must be carefully considered. Cores for new services should align with the cores of the plank so that prestressing tendons are not cut or damaged. Cutting larger openings in the plank is difficult, as the affected plank will need to be headed off by a (fire protected) steel member and the planks on either side will need to support additional loading.

ANTICIPATED SCOPE OF STRUCTURAL WORK The anticipated scope of structural work relating to the modernization and repair of the Douglas Middle School is summarized in this section. The proposed Architectural and MEP/FP work does not involve significant alterations to floor and roof framing or the masonry shear walls. No sections of the building will be demolished and removed/rebuilt and no structurally attached additions are proposed. The scope of structural/structurally related work is expected to include the following:

1. New openings in floor and roof construction will be required to accommodate new MEP/FP services. Local alterations to the existing, precast prestressed concrete plank floor and roof structure can be made; however, such alterations need to be carefully planned. Cores for new services should align with the cores of the plank so that prestressing tendons are not cut or damaged. Larger (shaft/chase) openings will be cut in the corridor – steel H-frames will be installed below the plank (spanning to the corridor bearing walls) to support the affected plank units.

2. The “leveling compound” that was applied on the precast floor planks in the original construction will be sampled and tested. As noted in our 6/25/10 Existing Conditions Structural Report, this may be a gypsum base product, which has deteriorated under moist conditions. Removal and replacement with a self-leveling, cementitious compound (e.g. Ardex K-15), may ultimately be required (corridor areas framed with precast plank).



3. Repairs to the exterior brick veneer and saw cutting of new control joints will be required, as previously noted in this narrative.

4. Repair of the expansion joint in the exterior walls, between the east wing and the western section of the building will be required, as previously noted in this narrative.

5. Modular classrooms: The existing modular classrooms will be removed; this will not have a structural impact on the existing building.

B2020 Exterior Windows

All window systems shall be thermally broken prefinished aluminum with 1” insulated Argon filled Low E glass unless otherwise specified. Gym Clerestory

4 ½” prefinished aluminum window (EFCO 2900) having 1” insulated low E glass with ceramic frit solar control exterior lite.

Aluminum Entrance Window Wall Framing 4 ½” (EFCO 403-T) with insulated 2 1/2” operable vents. Entrance framing shall be glazed with both 1” low e glass at exterior and 1/4 inch glass at interior vestibule framing.

Project Area: Windows 4 ½” deep window system (EFCO 2900 Series) with fixed and operable lights, 1” insulated low E glass. Provide expandable foam insulation at all window perimeter cavities / backer rod and sealant.

B2030 Exterior Doors Main entry doors at vestibules and exits are prefinished aluminum medium stile with tempered insulated glass. Interior vestibule doors same as exterior, but with 1/4” tempered glass. Exterior service doors shall be insulated galvanized hollow metal, painted. Remove three courses of brick, 8” of insulation and existing flashing. Provide new metal flashing, insulation and replace brick. Tooth-in brick to match existing. Service Doors: 14 gauge galvanized steel frames ASTM A525 for exterior doors

and interior doors where noted, and 16 gauge for interior frames. Doors to be fully welded 16 gauge exterior door and 18 gauge for interior doors with 12 gauge closer reinforcement.

B3010 Roof Coverings Existing Roof Areas: Sarnafil reinforced single-ply roof membrane (light colored), with 6” average tapered roof insulation on sloped and level steel and 6” average thickness (tapered at level steel) poly iso roof insulation, and vapor barrier. Provide new pressure treated blocking for new dimension of insulation thickness. All roof edge flashings shall be PVC coated metal compatible with welded roof membrane joints. Fascias, soffits and trim shall be prefinished aluminum.



B3020 Roof Openings Elevator Smoke Vent – for the top of the elevator shafts; assume a 4ʼx2ʼ motorized control damper activated by the fire alarm system. Vent shaft construction to be 8'x4'x6' high two hour rated shaft wall construction with PVC roof membrane cladding. Stage Smoke Vent – For over the stage assume four 6ʼx6ʼ fuseable link controlled smoke vents.



C INTERIORS C10 Interior Construction by Room 1. Gym: Floors -

C3020 Refinish existing maple flooring (3) coats low VOC finish and add main and cross court basketball lines and volleyball court lines. Replace and repair existing vented rubber base as needed.

Walls – C1010 C3010

Paint existing CMU and steel framing with low VOC epoxy paint to 14ʼ AFF. Replace existing panels with new 2” fibrous wood panels (“Tectum”) painted.

Ceiling C3030

Existing steel trusses and WF purlins & roof deck, and duct work with low VOC painted.

2. Cafeteria Floors C3020

Stone Source – porcelain series heavy duty commercial grade 12x24 porcelain glazed thin set with cove base. Door transition at cafeteria entry doors.

Walls C1010 C3010

Paint existing CMU walls with low VOC epoxy paint.

Ceiling C3030

ATC 48 X 48 inch fiberglass tegular lay in (Armstrong “Optima”) .90 NRC in 15/16” grid (Armstrong “Prelude XL”). GWB light cove and gypsum board / metal stud soffit and ceiling bond separating “high” and “low” ceiling areas.

3. Kitchen Area Floors C3020

Quarry tile, 8 x 8 inch, thin set (including cooler) with QT base. Staff toilet: Ceramic mosaic tile, thin set. Office and dry food storage: VCT, 12 x 12 inch, (Armstrong “Imperial”) with vinyl cove base.

Walls Paint existing CMU with low VOC epoxy paint. Ceiling

C3030 ATC, 24 x 24 inch with scrubbable face (Armstrong “Clean Room VC”) in 15/16” hot dip galvanized grid (Armstrong “Prelude XL Fire Guard”). Ceiling height 9ʼ-4” AFF (kitchen & toilet room). Office and Dry Food Storage: 24 x 24 inch ATC, tegular (Armstrong “Cortega”) NRC.55, in 15/16 grid (Armstrong “Prelude XL”) ceiling height 9ʼ-4” AFF.



4. Auditorium Floors

C3020 Existing concrete under seats and in pit, patched concrete and resurface with linoleum with vinyl base. Aisle to be “non-slip” linoleum surface.

Walls C1010 C3010

New prefinished maple veneer plywood panels mounted on metal furring (see drawings) with 5acoustic panels above. Procenium wall new maple veneer plywood panels. Rear wall maple veneer plywood paneling to 8ʼ AFF with fabric wrapped acoustic panels from 8ʼ AFF to ceiling, installed over 5/8” GWB on metal furring @ 16” o.c.

Ceiling C1010

Articulated suspended clouds of hardwood veneer paneling on existing framing with natural maple trim. (See drawings)

5. Stage Floors C3020

Wood dance flooring system: 2 1/4” overall thickness, 25/32” FSC certified maple on 2 layers 15/32” plywood on resilient pads over existing sub-floor barrier. Risers full width of stage consisting of solid maple 18” deep treads and 7” high risers (two treads & three risers) over existing sub-framing. Low VOC water based finish.

Walls C1010 C3010

Existing painted with low VOC painted.

Ceiling C3030

Exposed structure, low VOC painted.

6. Music/ Practice rooms

Floors C3020

Sheet linoleum (Forbo Marmoeum “Elementary”, 2mm thick, with welded seams) with vinyl cove base.

Walls C1010 C3010

5/8” GWB painted, both sides acoustic stud chase wall (two rows 6” metal studs @ 16 in. o.c. with acoustic insulators by Mason Industries installed between every fourth stud (4ʼ-0” o.c.) at 48” o.c. vertically) with acoustic batt insulation. In band & Chorus rooms, assume 50% of upper wall surface to have applied fabric wrapped acoustic wall panels in “checkerboard” pattern.

Ceiling C3030

ATC in “checkerboard” pattern, 50% 24 x 24 inch ATC tegular fiberglass panels, NRC.90, (Armstrong “Optima”) and 50% 24 x 24 inch ATC with scrubbable vinyl face (Armstrong “Clean Room VL”) in 15/16” grid (Armstrong “Prelude XL”).



7. IMC Floors

C3020 (TBD) with vinyl base. Carry $10/SF allowance.

Walls C1010 C3010

Paint existing CMU with low VOC painted.

Ceiling C3030

Low ceiling: 5/8” GWB hung ceiling system, painted. High ceiling: 48 x 48 ATC (“Optima”) in 15/16” grid (Armstrong “Prelude XL”) GWB/metal stud soffit and light cove at high/low ceiling areas.

8. Toilet Rooms Floors C3020

Ceramic mosaic tile, thin set, pitched to drains, over WP membrane, all with CT base.

Walls C1010 C3010

Paint existing CMU walls with low VOC paint.

Ceiling C3030

5/8” GWB on a suspension system with low VOC epoxy paint.

9. Stairs Stair Construction C2010 C2020

Steel stringers existing – Painted with low VOC paint. Add new to existing ballastrades; Guards fabricated from 2 1/2” x 1/2” barstock with 9 gauge wire mesh infill. 1 1/2” steel pipe handrails mounted on guards and walls. New slanted metal toe plates at each riser. Welded to existing stair construction.

Floors C2020

New rubber tile at intermediate landings and rubber riser/step treads on stairs (Norament 925) with rubber base at walls (not at steel stringers) and landings.

Walls C2020

CMU with low VOC epoxy paint.

Ceilings C3030

2 x 2 lay in ATC, tegular edged, mineral board tiles (Armstrong “Cortega”) NRC .55, in 15/16” grid (Armstrong “Prelude XL”) at top of stairs and floor level landings only).

10. Corridors Floors C3020

Linoleum.

Walls C1010 C3010

Paint CMU with low VOC epoxy paint.

Ceiling C3030

2 x 2 lay in ATC, tegular edged, mineral board tiles (Armstrong “Cortega”) NRC .55, in 15/16” grid (Armstrong “Prelude XL”) at top of stairs and man landings only.



11. Classrooms Floors

C3020 Linoleum with vinyl base.

Walls C1010 C3010

Paint CMU + GWB with low VOC epoxy paint.

Ceilings C3030

2 x 2 ATC tegular, fiberglass panels, NRC .90 (Armstrong “Optima”) in 15/6” grid (Armstrong “Prelude XL”).

12. Science Classrooms / Commercial Ed

Floors C3020

Linoleum with vinyl base.

Walls C1010 C3010

Paint CMU with low VOC epoxy paint.

Ceiling C3030

2 x 2 ATC tegular, fiberglass panels NRC .90 (Armstrong “Optima”) in 15/16” grid (Armstrong “Prelude XL”).

New casework / Counters (See drawings + Section E20)

New full height hardwood veneer and trim utility panel at entry. (See drawings)

13. Auditorium Lobby (Rms 340 & 341)

Floors C3020

12 x 24 porcelain tile with tile base with transitions to meet existing corridors.

Walls C1010 C3010

Paint CMU with low VOC epoxy paint. Clean existing exposed brick.

Ceilings C3030

2 x 2 ATC tegular, fiberglass panels, NRC .90 (Armstrong “Optima”) in 15/16” grid (Armstrong “Prelude XL”).

14. Administration / Nurse / Superintendent Suite

Floors C3020

Linoleum with vinyl base.

Walls C1010 C3010

5/8” GWB both sides 6” metal studs @ 16” o.c. with acoustic installation, low VOC painted at new wall and existing CMU painted with low VOC + vinyl base.

Ceiling C3030

2 x 2 ATC tegular edged (Armstrong “Cortega”) NRC .55, in 15/16 grid (Armstrong “Prelude XL”). New GWB acoustically isolated and suspended ceiling system under auditorium stage. (See drawings).



15. Gym Storage,

Electrical and Data Closets

Floors C3020

Low VOC epoxy painted concrete.

Walls C1010 C3010

8” CMU, low VOC painted.

Ceiling C3030

Underside floor deck and structure, low VOC painted.

16. Renovated Locker Rooms (new classrooms, offices)

Floors C3020

Linoleum with vinyl bases and concrete with low VOC epoxy paint.

Walls C1010 C3010

At classrooms + offices – metal furring with 5/8” GWB painted.

Ceiling C3030

24 x 24 ATC.

17. OT/PT Floors C3020

Resilient rubber tile (Mono “ramflex”) with base with wall pads. (See drawings).

Walls C1010 C3010

8 inch CMU with low VOC epoxy paint.

Ceiling C3030

24 x 24 inch ATC tegular edged (Armstrong “Cortega”) NRC .55 in 15/16” grid (Armstrong “Prelude XL”).

18. Janitor Closet Staff Toilet Rooms

Floors C3020

Ceramic mosaic tiles, thin set with ceramic tile base.

Walls C1010 C3001

Low VOC epoxy paint at CMU.

Ceiling C3030

24 x 24 inch ATC with scrubbable surface (Armstrong "Clean Room VL") in 15/16" hot dip galvanized grid (Armstrong "Prelude XL"). Ceiling height 8'-0".



19. Mech/Elec

Rooms/ Receiving/ Custodian Elevator Machine Room

Floors C3010

Concrete with low VOC epoxy paint. VCT with vinyl base (office only)

Walls C1010 C3010

CMU low VOC painted.

Ceilings C3030

ATC, 24x24 inch tegular edge mineral board NRC .55 (Armstrong "Cortega") on 15/16" grid (Armstrong "Prelude XL") – Office only. 2 hour rated GWB, painted (Elev Machine Room, Emergency Electric Rooms only), underside deck and structure, low VOC painted (all others)

21. Receiving Corridor

Floors C3020

Linoleum

Walls C1010 C3010

CMU with low VOC epoxy paint.

Ceiling C3030

ATC, 24x24 inch tegular edge NRC.55 (Armstrong "Cortega") on 15/16" grid (Armstrong "Prelude XL").

22. New Guidance Suite

Floors C3020

Linoleum

Walls C1010 C3010

6” metal studs with 5/8” GWB painted low VOC epoxy paint.

Ceiling C3030

2 x 2 ATC.

GENERAL C1010 Walls

All new wall construction full height to underside deck above.

C1020 Interior Doors and Frames Where new: Hollow metal welded frames with typical 3ʼx7ʼ solid core white oak wood doors FSC certified (no added urea formaldehyde) with low-VOC natural finish. See drawings for affected doors. At existing door frames to remain: Provide new 3 x 7 solid core wite oak wood doors and hardware mounted in existing frames. Generally “Sargent Signature Series” mortised door locks for all doors in project area.



Assume aluminum storefront inner door assemblies in main lobby and stair vestibules. See B2030 Exterior Doors. At kitchen, new roll down stainless steel manual security grate at new dishwashing area.

C1030 Fittings Markerboards & Tackboards for each classroom, and as noted on the drawings: Painted Steel writing surface on hardboard backing with extruded aluminum frames and chalk tray. Tackboards with linoleum cork (ie - Forbo “bulletin board”) covering on hardboard (no urea formaldehyde added) backing (no vinyl covered tack boards for IAQ reasons). Recycled solid plastic toilet partitions & urinal screens. Stainless Steel grab bars, bathroom accessories such as electric hand drivers, soap, sanitary napkin, and toilet paper dispensers, recessed waste bins, mirrors, etc. Exterior building canopy mounted signage assume 16” and 24” high cast aluminum letters: “Douglas Middle School” one each on the west and east entrances. (2) two total. Fire extinguishers, including recessed cabinets. Flag pole: (1) one. Cast Aluminum 35ʼ tall Interior Signage: Vandal resistant frame and sign with raised vinyl lettering, integral raster Braille (raised) and removable vinyl insert.



D SERVICES

D10 Conveying D1010 Elevators & Lifts

Existing elevator to remain. Provide new complete code compliant upgrade of car station, control panel and hall station devices at floor landings. One wheelchair lift at auditorium stage.

D20 Plumbing D2010 Plumbing Fixtures

Majority of the existing plumbing fixtures will be replaced with new fixtures to comply with ADA and water conservation requirements. Number of plumbing fixtures will be in accordance to 248 CMR Paragraph 10.10, Table 1. . Plumbing fixtures will be equipped with the following water conserving features

Water Closet Urinals Lavatory

Dual Flush Valve (Sloan WES-111, 1.6 gpf up and 1.1 gpf down) Or Electronic sensor 1.28 gpf flush valve (Sloan 81111.28)

Electronic sensor ultra low flow flush valve type- 0.25gpf (Sloan WEUS 1002) Or Waterfree Urinals (Sloan WES-1000)

Sloan Optima EAF-275-ISM “Solis” solar powered, sensor activated, hand washing faucet with integral spout temperature mixer, 0.5 gpm flow restricting aerator spray head and field adjustable run time limit setting.

D2020 Domestic Water Distribution

The existing main domestic water supply in the boiler room will be remain and re-used for this project. New 4” reduced pressure backflow preventer will be added into the main to protect the service (per the DEP regulation 310 CMR 22). Boiler water feed and make-up, and any other mechanical take-Offs will branch off through a reduced pressure-principle backflow preventer. The domestic cold water piping inside the building will be remain. Any new piping for the new plumbing fixtures will be taped off from the main piping. Domestic cold water will be distributed in “L” type copper tube with wrought or cast copper fittings. The piping will be insulated to prevent condensation. Existing domestic water storage tanks and associated piping in boiler room will be removed in its entirety and will be replaced with Two high efficiency (86%) oil fired water heaters and storage tank. (Veissmann Vitola 200, 300 MBH with four 130 Gallon tanks). Tanks will be manifold together to supply hot water distribution to classroom fixtures and kitchen appliances.



The domestic hot water distribution system in boiler room will be all new. There will be 2 different hot water supply / recirculation systems in the building. One system will operate at 140oF and will serve the kitchen dishwasher and 3 compartment sink. Existing hot water system will operate at 120oF and will serve the custodian room sinks, lavatories and classroom sinks. At the lavatories, the faucets will reduce the temperature to 110oF at the lavatories. Where ever new domestic hot water will be used, it will be distributed in “L” type copper tube with wrought or cast copper fittings. The hot water (HW) and re-circulating (HWC) piping will be insulated for energy savings. No HW or HWC piping will be concealed beneath the slab. All lab classrooms will be provided with tempered and protected water to supply emergency combination eye wash/shower. Existing propane gas will be used for the science labs. Each lab will be provided with master gas shut off valve.

D2030 Sanitary Waste Majority of the existing main underground and above ground sanitary piping will be remain. New sanitary branch piping will be provided to the new plumbing fixtures. Existing grease trap for culinary sink and prep. sink will be remain and reused. Existing grease waste line will be inspected and cleaned and re-used for this project. Science room laboratory sinks will be discharge to a new common acid neutralizing tank prior to the connection to sewer connection. Piping will be Schedule 40 polypropylene with electrical heat fusion type fittings The above ground sanitary drainage and vent in renovated building will be all new plumbing system and will be piped in cast iron with “no-hub” joints (3” or larger). Piping smaller than 3 inch will be piped in copper. See G3020 – Sanitary System for a description of the exterior sanitary system work.

D2040 Rain Water Discharge The existing roof drains will be replaced with new dual level promenade roof drains. One will be a regular drain and the other will be overflow drain. The new roof drain will be secured cast iron dome extension receiver with the lower drain bodies flashed into the waterproofing membrane. The existing storm water piping will remain intact and modified with new storm water piping to pick up all new roof drain location. The storm system will be installed in cast iron piping with all horizontal piping insulated to prevent condensation. See G3030 – Storm Sewer for a description of the exterior storm drain system.

D2090 Fuel Fuel source for the domestic hot water heating will be fuel oil #2 .



D30 HVAC

D3010 Energy Supply Energy for the school shall be #2 heating oil and shall be provided by the existing 5,000 gallon above grade oil tank

D3020 Heat Generating Systems The central plant will consist of two - 2000 MBH oil fired hot water boilers sized at 2/3 capacity each. The boilers will provide hot water for heating to energy recovery units (ERU), roof mounted air handling units RTU-1 and HV-1, and various terminal units throughout the building. The boilers will be controlled in a manner to maximize overall plant efficiency by firing the boilers at the lowest possible hot water temperature based on outdoor temperature. Hot water is distributed throughout the building by two base mounted end suction pumps (one is a full size spare), each controlled by a variable frequency drive.

D3030 Cooling Generating Systems The chilled water plant consists of an 80 ton air cooled chiller. Chilled water is pumped in a primary-secondary system separated by a plate heat exchanger. The chiller uses the “green” refrigerant R-410a.

D3040 Distribution Systems 1. The classrooms are heated, cooled and ventilated by ceiling recessed active

chilled beam units. These chilled beams will be supplied with ventilation air provided by a roof mounted energy recovery unit (ERU). Each space shall be controlled by a wall mounted thermostat.

2. The three ERUs provide tempered ventilation air to classrooms, corridors, and other miscellaneous spaces throughout the building. The first stage of heating is by the VFD-modulated energy wheel. Further heating is achieved through a hot water coil. The first stage of cooling is also through the wheel and further cooling is provided by a direct expansion (DX) condensing unit section. The DX cooling coil also provides dehumidification in conjunction with a wrap-around heat pipe (for reheat).

3. The ERUs operate continuously during occupied hours but only operate during unoccupied hours to provide air for chilled beam units to maintain unoccupied setpoint.

4. The corridors will be heated, cooled, and ventilated in the same manner as the classrooms. The second floor corridor (top floor) will have supplemental heating provided by wall recessed convectors.

5. The cafeteria will be served by a roof mounted air handling unit which provides heating, cooling, and ventilation. Heating is provided by hot water and cooling is accomplished through a DX condensing unit. Fans are controlled by VFDs and operate at 66% of full load until a call for further heating or cooling. Demand controlled ventilation modulates the outdoor airflow from 10% to full outdoor airflow based on readings at the return air carbon dioxide sensor. The unit is also equipped with economizing capability which uses outdoor air for cooling when the outdoor air enthalpy is within an acceptable range.



6. The kitchen hoods are connected to a roof mounted exhaust fan. The fan will run continuously during occupied hours. Makeup air is provided by a roof mounted makeup air unit. The unit provides heating with a fully modulating hot water heating unit.

7. Administrative Area (2nd floor) – The group of spaces on the first floor which serves school administrative staff is served by a roof mounted air handling unit which provides heating, cooling, and ventilation. Heating is provided by a hot water coil and cooling is accomplished through a DX condensing unit. Demand controlled ventilation modulates the outdoor airflow from 30% to full outdoor airflow based on readings at the return air carbon dioxide sensor. Heating and cooling modulates based on readings at the discharge air temperature sensor. The unit is also equipped with economizing capability which uses outdoor air for cooling when the outdoor air enthalpy is within an acceptable range. Each individual space is served by a variable air volume terminal box (VAV) which consists of a motorized damper and a hot water reheat coil. Each space has a wall mounted thermostat which modulates the damper for precision cooling and the heating coil for heating.

8. The IMC will be heated, cooled and ventilated by ceiling recessed active chilled beam units. These chilled beams will be supplied with ventilation air provided by a roof mounted energy recovery unit (ERU). Each space shall be controlled by a wall mounted thermostat.

9. The gymnasium is served by a roof mounted air handling unit which provides heating and ventilation. Heating is provided by hot water. Fans are controlled by VFDs and operate at 66% of full load until a call for further heating or cooling. Demand controlled ventilation modulates the outdoor airflow from 10% to full outdoor airflow based on readings at the return air carbon dioxide sensor. The unit does not provide cooling, but environmental cooling is provided by economizing, which uses outdoor air for cooling when the outdoor air enthalpy is within an acceptable range.

10. The main V/D head end room is cooled by a split DX system. Smaller elec./data rooms are cooled with supply air provided by supply fans through ductwork and diffusers.

11. There are miscellaneous spaces throughout the building that contain convectors, cabinet unit heaters, and finned tube radiation for heating.

12. All entrance vestibules and stairways shall contain ceiling mounted cabinet unit heaters to provide heat to the space.

D3060 Controls & Instrumentation The building shall be controlled by a direct digital control. The DDC System shall be capable of monitoring and controlling all points in the building HVAC system, energy recovery units, boilers, chiller, etc.



D40 Fire Protection D4010 Sprinklers

Building will be served from the existing 6” fire service line from the street. The 6” fire service enters the building under stair "B" and run through double check backflow preventer, fire pump, supervised OS&Y valves etc and feed two 3" standpipes located in stair "A" and stair" B". The fire pump is 50 HP electric pump and is located in room below stair "B". The Fire pump will provide the pressure and flow requirements of the sprinkler system. The entire building shall be protected throughout with a wet automatic fire suppression system. A fire department Siamese pumper connection is existing outside the Stair “B”. This system shall be designed in accordance with NFPA Standard 13, 2007, the Massachusetts State Building Code, 8th Edition and the town of Douglas Fire Department requirements. Sprinklers shall be supplied from the standpipes. Floor control valve stations, consisting of a monitored shut-off valve, flow switch and an Inspectorʼs test valve and sight glass, shall be provided at each floor take-off from the standpipe system. This shall report sprinkler flow to the fire alarm system on a floor-by-floor basis. Sprinkler heads in electrical and mechanical rooms shall be standard response, 212 degree temperature listing. Sprinklers in all other areas shall be quick response heads.

D4020 Standpipes Existing 3” standpipes will be removed and replaced with 4” standpipes. Standpipes would be designed in accordance with NFPA Standard 14, 2007, and Douglas Fire Department requirements. Standpipes shall be located in each required egress stairway, and adjacent to the Stage. Additionally, standpipes shall be located so that no part of the building is more than 200 feet from a standpipe valve. Each standpipe shall be equipped with a 2 1/2” fire department hose valve with 1 1/2” reducer at the stair floor landing. At the Stage, fire department valves shall be provided on each side of the stage. These shall be in recessed cabinets. Because the building is not a high rise, there is no minimum pressure requirement for the standpipes.

D4090 Fire Protection Systems Standpipes & sprinklers will be supplied from the existing dedicated water service, entering the building. The building service shall be equipped with a wet main alarm riser check valve, located at the service entrance. From there, this line would run to each stairways, and then up through the stairways as standpipes. Fire protection piping shall be schedule 40 piping with threaded fittings for any piping sized 2” and less. For sizes over 2”, schedule 10 piping with roll grooved fittings and couplings shall be used. All valves controlling the flow of water shall be equipped with supervisory devices that report to the Fire Alarm system. Kitchen hood will be protected with a dry agent “Ansul R-102” packaged hood suppression system Following hydrant flow test information was obtained from the Douglass town: Static Pressure: 80 psi Residual Pressure: 56 psi Flow: 1180 GPM Based on the above hydrant flow data and the elevation, existing fire pump can be reused for this project.



D50 Electrical D5010 Electrical Service & Distribution

Existing primary electric service to remain. If adequate spare capacity is available, existing switchboard to remain. As required, furnish and install lighting, receptacle, and power panels including associated feeders in conduit. All panels shall be installed in the electric closets provided on each floor of the building. As required, furnish and install a lighting and receptacle system in each of the areas being renovated within the building including all branch circuit wiring from the respective panelboards. Lighting and receptacle branch circuit wiring shall be installed in conduit raceways or shall be type MC metal clad cable in concealed locations. As required furnish and install all heating, ventilating, air conditioning, and plumbing power wiring, magnetic starters and disconnect switches. All power wiring shall be installed in conduit. Provide surge suppression protection on switchboard and all distribution panels.

D5020 Lighting & Branch Wiring Lighting to be controlled by occupancy sensors. Existing classrooms – Existing 2ʼ x 4ʼ lensed troffers will be replaced with 2ʼ x 4ʼ Lithonia RT5 series or approved equal. Cafeteria - Pendant mounted indirect lighting fixtures, wall sconces and downlighting. Gymnasium - Compact fluorescent high bay lighting fixtures controlled by occupancy sensors and daylighting controls. Offices and conference rooms - 2 x 2 recessed indirect lighting fixtures. Lithonia RT5 series or approved equal. All offices and administration areas - pendant mounted, ceiling recessed and wall mounted lighting fixtures. Litecontrol, Peerless, Lithonia, Focal point, Winona Auditorium – Furnish and install new theatrical lighting system and house lighting system. Corridors and stairwells - Wall mounted sconces, Visa Lighting and Winona Lighting. Recessed downlights Lithonia or approved equal. Lighting occupancy sensors in classrooms, toilets and offices. Occupancy sensors: WattStopper dual technology DT-200. As part of the daylight harvesting system, exterior classrooms and the gymnasium shall be furnished with dimming ballasts, daylighting controls and photocells. Electric rooms, mechanical rooms and storage rooms - Surface or pendent mounted lens lighting fixtures. All lighting fixtures in the building including gymnasium shall be controlled by local room switches and a building wide computer based lighting control system by Wattstopper. Furnish and install an internally illuminated exit sign system at all paths of egress within the building.



Site lighting fixture to meet IES full cut off rating. All site lighting to be controlled by multi-zone programmable time clock.

D5030 Communication & Security Fire Alarm System.

Furnish and install a complete addressable fire alarm system throughout the addition. The system shall consist of pull stations, smoke detectors, heat detectors, duct detectors, standby batteries and alarm speakers with strobe lights. All fire alarm system wiring shall be installed in conduit or fire alarm type MC metal clad cable in concealed locations. Smoke detectors shall be installed in egress areas including all corridors, stairways, lobbies. Audible/visual alarm notification horn/strobe light units shall be installed in all corridors, stairways, classrooms, conference, lobbies, gymnasium, mechanical spaces and toilets. Manual pull stations shall be installed in paths of egress. The fire alarm control panel is located in the main electric room. The fire alarm system shall be installed in accordance with NFPA 72.

Technology Systems include: Voice/Data/TV System, building-wide WIFI internet access, Cable TV and Video Distribution System, local Gym/music/cafe Sound Systems, Master Clock & PA/Intercom System.

Voice/Data System Voice/data outlets shall be installed in all offices, library (IMC), classrooms, gym, cafeteria, auditorium, and conference rooms. Voice/data outlets shall be installed at every desk location in all offices. Furnish and install conduits between each floor IDF closet and the MDF closet in the first floor. Provide 10Gb fiber optic cable and multi-pair voice riser cable between each IDF and the MDF. Provide fiber patch panels and voice cross-connect blocks. Furnish and install eight data drops in each classroom. Furnish and install twenty-eight data drops in the Tech classroom and twelve data drops n the science classrooms. Furnish and install two gang outlet box, plaster ring, 1¼” conduit to nearest accessible ceiling, insulating bushings and pull line for all voice/data outlet locations. If nearby accessible ceiling is not feasible extend conduits to nearest IDF closet. Furnish and install a structured cabling system consisting of all cat 6 voice/data cable, modular jacks, patch panels, wiring blocks, racks, fiber optic cable, fiber patch panels, 2-post open equipment racks, devices plates, outlet boxes, conduit, etc. for a complete and fully functional voice/data/video system. Each classroom, library and conference room shall be wired for wall mounted LCD projectors with multiple short throw projectors, interactive white boards and teacher lectern location. Furnish and install required conduit and wire.



Provide 100% wireless coverage in the building. Provide wireless access point ceiling and wall Enclosures at designated locations throughout the building. Provide a cat 6 data outlet for connection of a future Wireless Access Pont at each Enclosure to the building Local Area Network. Provide conduit raceway for future interactive white board in all classrooms. Provide a telephone system in the building including telephone in all classrooms and at all teacher/staff workstations. The telephone system shall be capable of Voice over IP. Provide all head end equipment including a voice mail system sized appropriately for the number of users. Provide telephone handsets in all classrooms, at every desk in offices and in common spaces, such as conference room, IMC, café, auditorium, and gym.

Video Distribution System Video outlets shall be installed in all offices, gym, (IMC), cafeteria, classrooms, auditorium, and conference room. The system shall be digital (Video over IP). Provide digital head end network equipment in the Head End MDF room. Furnish and install all cat 6 cable, devices plates, outlet boxes, conduit, etc. for a complete and fully functional video distribution system. Furnish and install two gang outlet box, plaster ring, 1¼” conduit to nearest accessible ceiling, insulating bushings and pull line for all cable video outlet locations. If nearby accessible ceiling is not feasible extend conduits to nearest IDF closet. Furnish and install conduits between each floor and the MDF closet in the first floor. Provide insulating bushings and pull lines.

Gymnasium Local Sound System The sound system shall be furnished with an amplifier, compact disk player, wireless microphone transmitter, microphone outlets and an assistive listening system mounted in a sound system rack with a lockable door. Provide speakers, mic jacks and wiring in the gymnasium. The two program channel sound system shall provide for the pickup, amplification and simultaneous reproduction at any single or group of speaker locations. Program sources are compact disc player, and microphones.

Music Room Local Sound System The sound system shall be furnished with an amplifier, recorder compact disk player, wireless microphone transmitter, microphone outlets and an assistive listening system mounted in a sound system rack with a lockable door. Provide speakers, mic jacks and wiring in the room.



Cafe Local Sound System The sound system shall be furnished with an amplifier, compact disk player, wireless microphone transmitter, microphone outlets and an assistive listening system mounted in a sound system rack with a lockable door. Provide speakers, mic jacks and wiring in the café and stage. The two program channel sound system shall provide for the pickup, amplification and simultaneous reproduction at any single or group of speaker locations. Program sources are compact disc player, and microphones.

Master and Central Sound System Clock Provide a new master clock system in the building. Secondary clocks shall be installed in all classrooms, offices, admin areas, and in all common spaces such as conference rooms, IMC, gym, auditorium, and café. The master clock shall be located in the MDF room Provide a central sound system with speakers in all classrooms, offices, admin, conference rooms, library, gym, café, corridors, and gang toilets. The Central Sound system equipment shall be located in the MDF room. System shall be accessed thru the telephone system via access codes. The Central Sound system shall be interfaced to the Master Clock system for scheduled bell tones.

Classroom Speech Reinforcement System Provide a speech reinforcement system in all classrooms. System to consist of amplifier, IR sensor, speakers and cabling.

Video Presentation Equipment Provide video presentation equipment at all teaching stations including classrooms, SPED rooms, IMC, etc. Equipment to include interactive whiteboards, short throw video projectors, security devices and plat panel monitors.

Security System. Furnish and install a complete security system include magnetic contacts, motion detector, sirens, key pad control pane, conduit and wire. Furnish and install magnetic contacts on all exterior doors. Furnish and install motion detectors in gym, corridors, lobbies and all exterior window rooms. Furnish and install a security camera system including server, color IP cameras with housings, conduit and cat 6 cabling. Furnish and install interior IP cameras at all egress doors and corridors. Furnish and install exterior cameras around the exterior of the building. Furnish and install Ethernet switches with Power over Ethernet (PoE) ports for all IP security cameras. Furnish and install a Network Video Recorder (NVR), Video Management software system, and Client software. The NVR shall be sized for three (3) to four (4) weeks of image storage. Provide a cabinet/rack for the head end equipment to include the NVR, rack-mounted monitor, and a UPS system. Head end equipment shall be located in the MDF.



Furnish and install a video/audio door intercom system at the main entry doors to provide for verification of visitors and remote door release from the main office. The system shall include door stations, master stations, and all low voltage cabling and power supplies. Electronic door latch hardware shall be provided by the door vendor. Furnish and install a Card/Proximity Access Control system at the designated door locations. The system shall include Card/Proximity Readers, all low voltage cabling and power supplies, a system server with Management Software system. Electronic door latch hardware and Request to Exit devices shall be provided by the door hardware vendor. Furnish and install a complete conduit system for the security system. Furnish and install all required conduits, outlet boxes, pull lines, plaster rings, junction boxes required for a complete security system.

D5090 Other Electrical Systems

Emergency Electrical Light and Power System Furnish and install an emergency life safety light and power system. The system shall consist of lighting fixtures, exit signs, conduit, wire, auto transfer switch, supervisory relays, two-hour mineral insulated cables, panelboards and cabinets. Life safety emergency lighting shall be installed in accordance MEC Article 700. Life safety emergency system shall serve emergency lighting, exit signs, fire alarm system and fire pump (if required). Designated lighting fixtures in all paths of egress such as corridors, interior classrooms, cafeteria, toilets, library, gymnasium, lobbies and stairwells shall be connected to the emergency lighting system. Also, designated lighting fixtures in the administration offices, toilets, mechanical rooms and electric rooms. Furnish and install an emergency standby power system. The system shall consist of conduit, wire, auto transfer switch, panelboards and cabinets. Emergency standby system shall be installed in accordance MEC Article 702. Standby system shall serve kitchen refrigeration, boilers, boiler pumps, gym and cafeteria AHUs, intrusion security system, and communication systems. Furnish and install a new exterior diesel driven emergency generator in sound attenuating enclosure with double wall sub-base fuel tank, and new ductbank into new main electrical room. New generator located adjacent to the building.

Lighting Occupancy Sensors A building lighting management system with timeclock capabilities shall be installed to control all lighting in corridors, stairwells, gymnasium and all other areas of similar occupancy. The entire lighting design will be evaluated on a life cycle cost analysis (LCCA) basis. The entire lighting system shall meet all requirements of the State Energy Code.



E EQUIPMENT & FURNISHINGS E10 Equipment E1010 Foodservice Equipment

The foodservice program will consist of a targeted upgrade of the existing equipment. Scope for Serving Area shall include:

• Replace the existing serving line in order to improve it current function. This work would involve adding two drop in cold pans and sneeze guards.

• Add two floor sinks to service the serving line. Trenching the floor will be required along the entire length of the current serving line location to allow for new drain lines and power requirements related to the cold pans.

• Provide power and data for the cash register systems • Reconfigure wall openings to improve student flow and visibility for

kitchen staff. Scope for Kitchen Area shall include:

• Provide new faucets and lever waste drains for the prep sink. • Provide a new wall shelf above the prep sink. • Reconfigure drain line so that prep sink waste is air gapped. This will

require floor trenching. • Provide new faucets and lever waste drains for the pot sink sink. Weld,

grid, and polish plug weld holes left by removed sink bowl heater and sink bowl agitator.

• Replace the steam kettle with a self contained tilting kettle. Trench floor and provide a floor trough to service the kettle

• Remove old boiler base and replace it with a new self-contained steamer. • Trench floor and provide a floor trough to service the existing braising

pan. • Remove the existing range and replace it with a new electric griddle. • Replace the existing exhaust hood. • Provide a hood fire suppression system to cover all cooking equipment as

required. • Replace existing walk-in cooler and freezer with a new panels and

mechanical systems. Scope related to existing equipment shall include:

• Foodservice equipment that is scheduled for reuse shall be removed and stored off site.

• The Kitchen equipment contractor shall verify and document the operating condition of all relocated equipment prior to its being disconnected. Document the condition of the equipment to note any dents, scratches, broken components or other damage prior to placing it in storage. Protect equipment during transport and storage, and assume responsibility for its re-installation in the condition viewed prior to removal.



• Related trades shall perform disconnecting and reconnecting of services to "Existing" equipment.

• This Contractor shall restart all existing equipment following its reconnection to building services and verify its correct operation as viewed prior to removal.

Foodservice Equipment Budget: • Equipment budget range is $95,000 to $115,000 for targeted upgrades of

the foodservice equipment.

E1020 Institutional Equipment Stage Curtain: Velour stage curtain on heavy duty cord operated track with valance with an additional 2 hour rated fire curtain.

E1030 Vehicular Equipment – NA

E1040 Other Equipment Maintenance Equipment: N/A (Furnishings & Equipment) Unit Kitchens: One each in teacher lunchroom, and Administration Area. Existing to remain with modified HP station

Appliances: Undercounter refrigerator / freezer with icemakers and dishwashers for science prep rooms. Refrigerator, range, microwave oven, dishwasher and washer and dryer in one of Life Skills classrooms.

Athletic Equipment: New retractable basketball backstops + hoops (6) total with suspended vertical retractable divider curtain.

Stage Equipment: New stage rigging, stage curtains, theatrical lighting and sound systems, and projection screen.

E20 Furnishings E2010 Fixed Furnishings

Fixed Casework: Includes prefinished maple veneer counters with plastic laminate tops in main office, teacher mailboxes (75 staff), library, and circulation desk – 40 LF.

Wall Paneling: Factory finished maple veneer plywood and solid maple trim at sidewalls and proscenium wall of auditorium.

Science Casework: Modular pre-manufactured wall and base cabinets in science rooms and prep rooms including teacher demonstration tables and student lab benches with hot and cold water, data and 120V power, constructed of maple veneer plywood with 1” epoxy resin tops. One HP accessible work station in each classroom and in each



prep room. One vented acid storage cabinet and one flammable storage cabinet in one science room.

Art Rooms: Modular pre-manufactured wall and base cabinets with epoxy tops as for science rooms.

Auditorium Seating: Fixed upholstered retractible auditorium chairs (see plans for quantities and layout).

New Lockers: Remove existing lockers and replace with new metal lockers with sloped top mounted on existing concrete base (Approximately 480).

Window Treatment: Perforated (1% opeonness) window shade with chain clutch, bottom rail and fascia.

E2020 Moveable Furnishings – NA Includes furniture & accessories, moveable rugs & mats, etc. which are NOT to be part of the estimated construction cost (F&E).

F SPECIAL CONSTRUCTION & DEMOLITION F10 Special Construction – Not Applicable F1010 Special Structures – Not Applicable

F1020 Integrated Construction – Not Applicable

F1030 Special Construction Systems – Not Applicable

F1040 Special Facilities – Maintain services and egress elements to occupied existing school building while phased renovations and additions are underway.

F1050 Special Controls & Instrumentation – Not Applicable

F20 Building Demolition

F2010 Building Elements Demolition Selective demolition of building areas to remain includes all windows, interior finishes, roofing, interior partitions, all plumbing, fire protection, HVAC and electrical systems, and exterior wall construction at the gym (see demolition drawings).

F2020 Hazardous Components Abatement Before building demolition and renovation, abate all asbestos containing materials.



G BUILDING SITEWORK G10 Site Preparation G1010 Site Clearing

REFER TO ELEMENTARY SCHOOL SYSTEMS NARRATIVE.

G1020 Site Demolition and Relocations REFER TO ELEMENTARY SCHOOL SYSTEMS NARRATIVE.

G1030 Site Earthwork REFER TO ELEMENTARY SCHOOL SYSTEMS NARRATIVE.

G1040 Hazardous Waste Remediation - *** ALLOWANCE FOR POSSIBLE OIL CONTAMINATED SOILS ***

G20 Site Improvements G2010 Roadways


G2020 Parking Lots REFER TO ELEMENTARY SCHOOL SYSTEMS NARRATIVE.

G2030 Pedestrian Paving REFER TO ELEMENTARY SCHOOL SYSTEMS NARRATIVE.

G2040 Site Development REFER TO ELEMENTARY SCHOOL SYSTEMS NARRATIVE.

G2050 Athletic Surfacing – Not Applicable G2070 Landscape Drainage


G2080 Soil Preparation REFER TO ELEMENTARY SCHOOL SYSTEMS NARRATIVE.

G2090 Landscaping REFER TO ELEMENTARY SCHOOL SYSTEMS NARRATIVE.

G2100 Automatic Irrigation REFER TO ELEMENTARY SCHOOL SYSTEMS NARRATIVE.

G2101 Sports Lighting: REFER TO ELEMENTARY SCHOOL SYSTEMS NARRATIVE.



G30 Site Mechanical Utilities G3010 Water Supply


G3020 Sanitary Sewer REFER TO ELEMENTARY SCHOOL SYSTEMS NARRATIVE.

See D2030 Sanitary Waste for more information.

G3030 Storm Sewer REFER TO ELEMENTARY SCHOOL SYSTEMS NARRATIVE.

G3040 Heating Distribution Not Applicable

G3050 Cooling Distribution Not Applicable

G3060 Fuel Distribution REFER TO ELEMENTARY SCHOOL SYSTEMS NARRATIVE.

G3090 Other Site Mechanical Not Applicable

G40 Site Electrical Utilities

G4010 Electrical Distribution Existing primary electric service to remain..

G4020 Site Lighting

See Drawings for locations of all light fixtures. Provide reinforced concrete footings at frost depth for each lighting fixture. Provide all associated trenching, electrical conduit, equipment, and other costs necessary to install proposed lights.

Roadway and Parking Lot Light Fixtures – IES Full cutoff fixture on 20ʼ-0” pole.

Walkway Light Fixtures - IES Full cutoff fixture on 14ʼ-0” pole.

Building mounted lighting fixtures – Building mounted lighting fixture IES full cut off, CFL lamps shall be provided as required at all doors and for building security.

Pole mounted and wall mounted exterior lighting fixtures for the entrances to the building shall be controlled by multi-zone programmable time clock (LEED EA Credit 1 – Optimize Energy Performance).



G4030 Site Communications & Security Existing site communication ductbanks to remain.

G90 Other Site Construction G9010 Service and Pedestrian Tunnels

Not Applicable

G9020 Other Site Systems & Equipment Not Applicable

douglas elementary school douglas middle … 50-percent...massachusetts school building authority...

Documents