addendum no. 2 february 26, 2018 · 1 addendum no. 2 february 26, 2018 lake street bascule bridge...

1

ADDENDUM NO. 2

February 26, 2018

Lake Street Bascule Bridge over the South Branch Chicago River,Structural Repairs

Specification No. 469154

For which proposals will be opened in the office of the Department of ProcurementServices, Room 103, City Hall, 121 North LaSalle Street, Chicago, Illinois 60602, on

March 8, 2018 at 11:00 a.m., Central Time

The Addendum in its entirety can be downloaded and printed from URL address:www.cityofchicago.org/bids

1. The Bid Opening Date has been postponed from March 8, 2018 until March 15,2018 at 11:00 a.m. Central Time.

2. Additional Plans:

a. Catwalks replacement plans S503 to S507 have been developed and areincluded in this Addendum.

b. Revised Plans G002 & S002 have been revised and are included in thisAddendum.

3. Revised Schedule of Prices:

a. Line No. 20 – Code Number Z0012755 – Structural Repair of Concrete(Depth Greater than 5 inches): total quantity is 240 square feet.

b. Remove the schedule of prices and replace with the attached Schedule ofPrices, Addendum 2 - Revised 2/26/18.

4. Additional:

a. Photos of bridge openings during the west trunnion trusses rehabilitationare included in this Addendum.

End of Addendum No. 2

Department of Procurement Services Jamie L. RheeCity of Chicago Chief Procurement Officer

City Funded Instructions and Execution Documents (Rev. August 2017)

SCHEDULE OF PRICES

30179

TextBox

Addendum 2 - Revised 2.26.18

Addendum 2 – Revised 2.26.18

City Funded Instructions and Execution Documents (Rev. August 2017) 18 Revised

SCHEDULE OF PRICESLAKE STREET BASCULE BRIDGE OVER THE SOUTH BRANCH CHICAGO RIVER STRUCTURAL REPAIRS

CDOT PROJECT NO. E-4-712SPECIFICATION NO. 469154

BALANCED BIDS: Bidder's pricing for each line item should carry its share of the cost of work, plus its share of overhead and profit. Bidders should avoidnominal pricing for some lines and enhanced pricing for other lines. Bids that the Chief Procurement Officer considers in his/her sole opinion to be materiallyunbalanced will be rejected.

ITEM

#

CODE

NUMBERDESCRIPTION UNIT

TOTAL

QUANTITYUNIT PRICE TOTAL COST

1 67100100 MOBILIZATION L. Sum 1

2 ******** TRAFFIC CONTROL AND PROTECTION L. Sum 1

3 ********RAILROAD PROTECTIVE LIABILITY

INSURANCEL. Sum 1

4 ********REMOVAL OF EXISTING

SUPERSTRUCTURESL. Sum 1

5 ********DISMANTLING SHORING SYSTEM,

TRUNNION GIRDERL. Sum 1

6 ********ERECTING SHORING SYSTEM, CTA

COLUMNL. Sum 1

7 ********FURNISHING AND ERECTING

STRUCTURAL STEELL. Sum 1

8 ******** ERECTING STRUCTURAL STEEL L. Sum 1

9 ********REMOVING, FURNISHING AND ERECTING

FIELD IDENTIFIED STEELPound 10,000

10 ********CLEANING AND PAINTING SELECTIVE

STEEL STRUCTURES - EAST LEAFL. Sum 1

11 ********CLEANING AND PAINTING SELECTIVE

STEEL STRUCTURES - WEST LEAFL. Sum

1

Addendum 2 – Revised 2.26.18

City Funded Instructions and Execution Documents (Rev. August 2017) 19 Revised

SCHEDULE OF PRICESLAKE STREET BASCULE BRIDGE OVER THE SOUTH BRANCH CHICAGO RIVER STRUCTURAL REPAIRS

CDOT PROJECT NO. E-4-712SPECIFICATION NO. 469154

BALANCED BIDS: Bidder's pricing for each line item should carry its share of the cost of work, plus its share of overhead and profit. Bidders should avoidnominal pricing for some lines and enhanced pricing for other lines. Bids that the Chief Procurement Officer considers in his/her sole opinion to be materiallyunbalanced will be rejected.

ITEM

#

CODE

NUMBERDESCRIPTION UNIT

TOTAL

QUANTITYUNIT PRICE TOTAL COST

12 ********CONTAINMENT AND DISPOSAL OF LEAD

PAINT CLEANING RESIDUESL SUM 1

13 CDOT5010030 CONCRETE REMOVAL CU YD 185.8

14 ********JACKING OPERATIONS, TRUNNION

GIRDERL SUM 1

15 ******** JACKING OPERATIONS, CTA COLUMN L SUM 1

16 ******** BRIDGE OPERATION AND MAINTENANCE L SUM 1

17 ******** FURNISH & INSTALL PROJECT SIGN EACH 2

18 50300225 CONCRETE STRUCTURES CU YD 7.2

19 50800205 REINFORCEMENT BARS, EPOXY COATED POUND 330

20 Z0012755STRUCTURAL REPAIR OF CONCRETE

(DEPTH GREATER THAN 5 INCHES)SQ FT 240

21 ******** CTA FLAGGING AND TRAINING ALLOWANCE 350,000 $1.00 $350,000

AWARD CRITERIA FIGURE

TOTAL BASE BID

CONSULTANT

DRAWN

CHECKED

APPROVED

DATE

SCALE

CONTRACT NO.

SHEET NO.

NO. BY DATE DESCRIPTION

REVISIONS

DEPARTMENT OF TRANSPORTATION

CITY OF CHICAGO

DIVISION OF ENGINEERING

RLR

PROJECT NO. E-4-712

2 OF 77 SHEETS

MAH/TW

12/13/2017

JMS

N.T.S.

2 KVH 2/22/2018 BID ADDENDUM NO. 2

STRUCTURE NUMBER 016-6029

STRUCTURAL REPAIRS

CHICAGO RIVER

OVER THE SOUTH BRANCH

LAKE STREET BASCULE BRIDGE

SUMMARY OF QUANTITIES

GENERAL NOTES

INDEX OF SHEETS

COVER SHEET

SHEET TITLE

DETOUR PLAN AND TRAFFIC CONTROL NOTES

SHEET TITLE

INDEX OF SHEETS

G004

G003

G002

G001

SHEET NO.

C001

SHEET NO.

G002

CIVIL SHEETS

STRUCTURAL SHEETS, CONTINUED

STRUCTURAL SHEETS

GENERAL SHEETS

S300

S210

S209

S208

S207

S206

S205

S204

S203

S202

S201

S200

S140

S139

S138

S137

S136

S135

S134

S133

S132

S131

S130

S129

S128

S127

S126

S125

S124

S123

S122

S121

S120

S119

S118

S117

S116

S115

S114

S113

S112

S111

S110

S109

S108

S107

S106

S105

S104

S103

S102

S101

S100

S002

S001

SHEET NO.

CTA COLUMN SHORING ELEVATIONS, SECTIONS, & DETAILS

EAST LEAF CTA COLUMNS SHORING

TIMBER PLATFORM MODIFICATIONS

MACHINERY GIRDER ELEVATION 3-3 AND SECTIONS P-P, Q-Q, R-R, & S-S

TRUNNION GIRDER REINFORCEMENT DETAILS M & N

TRUNNION GIRDER REINFORCEMENT SECTIONS H-H, I-I, K-K, & L-L

TRUNNION GIRDER REINFORCEMENT SECTIONS E-E, F-F, & G-G

TRUNNION GIRDER REINFORCEMENT ELEVATION 2-2

TRUNNION GIRDER REINFORCEMENT SECTIONS C-C & D-D

TRUNNION GIRDER REINFORCEMENT SECTIONS A-A & B-B

TRUNNION GIRDER REINFORCEMENT ELEVATION 1-1

TRUNNION GIRDER PARTIAL DEMOLITION ELEVATION

TRUNNION GIRDER REINFORCEMENT PLAN

EAST LEAF TRUNNION GIRDER REINFORCEMENT

CARRYING TRUSS TOP CHORD WEB REPAIR

CARRYING TRUSS TOP CHORD BOTTOM ANGLE REPAIR

CARRYING TRUSS GUSSET PLATE REPAIR 3



MUNSTER STEEL CARRYING TRUSS FIELD BOLT LOCATION FB4




MUNSTER STEEL CARRYING TRUSS SHOP BOLT SCHEDULE SB1

MUNSTER STEEL CARRYING TRUSS SHOP DRAWING 25

























MUNSTER STEEL CARRYING TRUSS SHOP ASSEMBLY DIAGRAM SA1

MUNSTER STEEL CARRYING TRUSS ERECTION DIAGRAM E1

CARRYING TRUSS ELEVATIONS OUTBOARD 2

CARRYING TRUSS ELEVATIONS OUTBOARD 1

CARRYING TRUSS ELEVATIONS INBOARD 2

CARRYING TRUSS ELEVATIONS INBOARD 1

EAST LEAF CARRYING TRUSSES REPAIRS

GENERAL NOTES AND BILL OF MATERIALS

GENERAL PLAN AND ELEVATION

SHEET TITLE

S507

S506

S505

S504

S503

S502

S501

S500

S413

S412

S411

S410

S409

S408

S407

S406

S405

S404

S403

S402

S401

S400

SHEET NO.

TRUNNION GIRDER ACCESS PLATFORM STEP SECTIONS

TRUNNION GIRDER ACCESS PLATFORM PLANS, SECTIONS AND DETAILS

PLATFORM OVER MAIN PINION SHAFT PLAN, ELEVATIONS AND DETAILS

MOVABLE LEAF BOTTOM CHORD WALKWAY SECTIONS AND DETAIL

TRUNNION GIRDER ACCESS PLATFORM PLAN

LOWER DECK LATERAL BRACING REPLACEMENT

WEST PIT CONCRETE REMOVAL

ANCHOR COLUMN REPAIRS

MISCELLANEOUS REPAIRS

TRUNNION SHORING TOWER SHOP DRAWING 8








TRUNNION SHORING TOWER ERECTION DIAGRAM E2

TRUNNION SHORING TOWER ERECTION DIAGRAM E1

TRUNNION SHORING GRILLAGE LAYOUT AND DETAILS

TRUNNION SHORING ELEVATION 2

TRUNNION SHORING ELEVATION 1

TRUNNION SHORING PLAN AND DETAILS

(INSTALLED UNDER PREVIOUS CONTRACT, SHOWN FOR REFERENCE ONLY)

EAST LEAF TRUNNION GIRDER SHORING PREVIOUSLY INSTALLED

SHEET TITLE

2

CONSULTANT

DRAWN

CHECKED

APPROVED

DATE

SCALE

CONTRACT NO.

SHEET NO.


REVISIONS


CITY OF CHICAGO


RLR

PROJECT NO. E-4-712

1 OF 77 SHEETS

MAH/TW

12/13/2017

JMS

N.T.S.

1 RLR 2/6/2018 BID ADDENDUM NO. 1

2 RLR BID ADDENDUM NO. 22/22/2018


STRUCTURAL REPAIRS

CHICAGO RIVER



PAINTING NOTES

STRUCTURAL NOTES

S002

BILL OF MATERIALS

AND

GENERAL NOTES

ITEM UNIT SUPER SUB TOTAL

1

1

1

1

1

1

Pound

L Sum

Sq Ft 240 240

TOTAL BILL OF MATERIAL

L Sum

L Sum

CONSTRUCTION SEQUENCE NOTES

STEEL PROCUREMENT NOTES

SHORING SYSTEM JACKING NOTES

STRUCTURAL NOTES CONTINUED

10,000 10,000

TRUNNION GIRDER REINFORCEMENT NOTES

overstressed during any step of the removal and replacement process.

State of Illinois showing that all members will remain stable and not become

replacement process and calculations sealed by a Licensed Structural Engineer in the

Contractor shall submit a construction procedure showing each step of the removal and

bridge in all phases of construction. Prior to replacement of steel members, the

carrying trusses, and the Contractor shall be responsible for the stability of the bascule

Jacking of the existing trunnion girder shoring system will not relieve all load from the 4.

jacking is terminated due to „" movement in the CTA tracks.

in the CTA tracks, which ever occurs first. The Contractor shall notify the Engineer if

kips (per tower including existing 240 kips pre-load) or when „" movement is observed

Special Provision "Jacking Operations, Trunnion Girder" and shall be terminated at 1,100

Jacking of the existing trunnion girder shoring system shall be in accordance with the 3.

at both the north and south towers under a previous contract.

The existing trunnion girder shoring system has been installed and loaded to |240 kips 2.

and pedestrian traffic.

All jacking operations shall be performed with the structure closed to CTA, vehicular, 1.

SHORING SYSTEM JACKING NOTES CONTINUED

PROCEDURE

SUGGESTED CARRYING TRUSS DEMOLITION AND ERECTION

which can be obtained from the City of Chicago, 30 North LaSalle Street Chicago, IL 60602.

Plans to be worked in conjunction with existing drawings series 166029002 thru 1660290850, 16.

them.

All exposed edges of concrete must be chamfered ƒ" unless other members are erected flush with 15.

Reinforcement bars must conform to the requirements of ASTM A706 Gr. 60.14.

All construction joints shall be bonded.13.

Reinforcement bars designated (E) shall be Epoxy Coated.12.

other coatings that would prevent solid seating of the connecting parts.

be free of scale, burrs, dirt, or other foreign material, oil, previously applied paint, lacquer, or

All contact surfaces on new and existing steel, including connection bolts, nuts, and washers, shall 11.

this work shall be considered incidental to the pay item to which it pertains.

the outline of the reamed hole. Final holes must be round and may not be oversized. The cost of

new material and field reamed to match existing holes provided the sub-hole is fully contained in

Steel" or "Furnish and Erect Structural Steel". Holes may be sub-punched or sub-drilled in the

approved by the Commissioner and in accordance with the Special Provisions "Erect Structural

to ordering material for fabrication. Holes in the existing structure may be enlarged only as

structure. Bolt and rivet spacings and sizes must be verified in the field by the Contractor prior

The location and diameter of the holes in new connecting material must match holes in the existing 10.

actually furnished at the unit price for the work.

for a change in the scope of the work. However, the Contractor will be paid for the quantity

to construction or ordering material. Such variations shall not be cause for additional compensation

dimensions and details affecting new construction and make necessary approved adjustments prior

and are subject to nominal construction variations. The Contractor shall field verify existing

Plan dimensions and details relative to the existing structure have been taken from existing plans

The Contractor is responsible for proper fitting and assembly of all parts of the proposed work. 9.

must be approved by the Commissioner prior to implementation.

of interfering member or install countersunk bolts as possible mitigating solutions. All modifications

the structure. Where interferences occur, the Contractor shall use clipped washers, trim the edge

verify the fit and clearance of all new components that connect to existing or replaced sections of

attention of the Commissioner for resolution prior to fabrication. Likewise, the Contractor shall

and the Fabricator shall review the drawings for such conflicts in detail and bring them to the

change may cause some interferences and erection conflicts for bolt installation. The Contractor

The Contractor shall note that bolts are used in place of original rivets. It is anticipated that this 8.

Toughness Requirements of the AASHTO/AWS Fracture Control Plan (FCP).

requirements, FCM, unless noted otherwise. All carrying truss repair steel shall meet Notch

carrying elements subject to tensile stresses requiring conformance to fracture critical material

All carrying truss repair steel (Sheets S136-S146), shall be considered non-redundant main load 7.

No field welding is permitted except as specified in the Contract Documents.6.

All structural steel shall be AASHTO M270 (ASTM A709) Grade 50.5.

remain loaded and in-place.

After completion of the structural steel repairs, the CTA column shoring system shall 8.

with the Special Provision "Dismantling Shoring System, Trunnion Girder".

system shall be unloaded, disassembled, and transported to a CDOT facility in accordance

After completion of the structural steel repairs, the existing trunnion girder shoring 7.

Provisions "Jacking Operations, Trunnion Girder" and "Jacking Operations, CTA Column".

be monitored via survey and the shoring systems inspected in accordance with the Special

Before, during, and after jacking the Trunnion Girder and CTA column, the structure shall 6.

CTA tracks.

Contractor shall notify the Engineer if jacking is terminated due to „" movement in the

is observed in the CTA tracks directly above the CTA column, which ever comes first. The

"Jacking Operations, CTA Column" and shall be terminated at 45 kips or when „" movement

Jacking of the CTA column shoring system shall be in accordance with the Special Provision 5.

steel not shown on Sheets S104-S135.

The Contractor shall be responsible for the fabrication and procurement of all structural 5.

as required for erection is the responsibility of the Contractor.

proper installation. Any disassembly of the previously fabricated carrying truss members

not be paid extra for any field adjustments or modifications required to accomplish

carrying truss members. The Contractor is solely responsible for final detailing, and will

The Contractor shall be responsible for erection of all structural steel, including the 4.

bridge to vehicular, pedestrian, and CTA traffic.

shoring system shall be reinstalled and re-loaded to |240 kips prior to reopening the

partial opening of the bridge for material delivery into the pit. The trunnion girder

The trunnion girder shoring system may be unloaded and moved as required to allow for 3.

the Contractor.

disassembly required for placement of the steel into the pit shall be the responsibility of

steel with the fabricator, and unload and store the material at the jobsite. Any

inspect the fabricated material prior to erection, coordinate delivery of the structural

torqued. All gusset plates A1 are loose. It shall be the Contractor's responsibility to

A1A2, A1A3, A1A4, A1A5, A1A6, A1A7 are assembled. The shop bolts are not fully

are fabricated and will be delivered under a separate contract. Carrying truss members

The East Leaf north and south carrying truss members as shown on Sheets S104-S135 2.

Sheets S400-S413.

Trunnion Girder" and "Dismantling Shoring System, Trunnion Girder" and as shown on

unloading, and dismantling the shoring system per Special Provisions "Jacking Operations,

|240 kips under a previous contract. The Contractor is responsible for jacking,

Existing trunnion girder shoring system has been fabricated, installed, and loaded to 1.

existing trunnion girder shoring and CTA column shoring.

Carrying truss repairs (Sheets S100-S140) shall be completed prior to unloading the 5.

(Sheets S300-S413) prior to performing the carrying truss repairs.

Existing trunnion girder shoring system and CTA column shoring system shall be jacked 4.

the existing trunnion girder shoring system or the CTA column shoring system.

Trunnion girder reinforcement (Sheets S200-S209) shall be completed prior to jacking 3.

both the north and south towers under a separate contract.

Existing trunnion girder shoring system has been installed and loaded to |240 kips on 2.

of any utilities shall not be permitted.

Some of the work in this contract is in close proximity to existing utilities. Relocation 1.

Both ends (north and south) of the trunnion girder may be worked on simultaneously.3.

The trunnion girder reinforcement may be installed in any order.2.

trunnion girder reinforcement work.

The trunnion girder shoring system shall be loaded to |240 kips for the duration 1.

Both carrying trusses may be worked on simultaneously.7.

Remove and replace the remaining A1 gusset plate.6.

A1A7. Only one member per carrying truss may be removed and replaced at any time.

Remove and replace the remaining half of carrying truss members A1A2, A1A3, A1A4, and 5.

replaced in Step 2.

Remove and replace the A1 gusset plate corresponding to the side of the carrying truss 4.

one piece. Only one member per carrying truss shall be removed and replaced at any time.

same half of all members should be removed. Remove and replace members A1A6 and A1A5 in

Remove and replace one half (north or south) of members A1A2, A1A3, A1A4, and A1A7. The 3.

demolition and erection.

The carrying truss shall be braced to prevent lateral movement at gusset plate A1 during 2.

review by the commissioner prior to any demolition on the carrying truss.

erection procedure stamped by a Structural Engineer registered in the State of Illinois for

The procedure outlined below is a suggestion. The Contractor shall provide a demolition and 1.

(Depth Greater than 5 Inches)

Structural Repair of Concrete

Coated

Reinforcement Bars, Epoxy

Concrete Structures

Bridge Operation and Maintenance

jacking Operations, CTA Column

Girder

Jacking Operations, Trunnion

Concrete Removal

Paint Cleaning Residues

Containment and Disposal of Lead

Steel Structures - West Leaf

Cleaning and Painting Selective

Steel Structures - East Leaf

Cleaning and Painting Selective

Field Identified Steel

Removing, Furnishing and Erecting

Erecting Structural Steel

Structural Steel

Furnishing and Erecting

Column

Erecting Shoring System, CTA

Trunnion Girder

Dismantling Shoring System,

Removal of Existing Structures 11L Sum

L Sum 1 1

L Sum 1 1

L Sum 1 1

11L Sum

Cu Yd

11L Sum

1L Sum

185.8 185.8

11L Sum

Cu Yd 7.2 7.2

Pound 330330

All motors and machinery shall be properly protected from cleaning and painting work.6.

installed under a separate contract in 2015-2016 may be cleaned by alternate methods.

Structure". When approved by the Commissioner, East Leaf Carrying Truss structural steel

shall be painted in accordance with IDOT GBSP "Cleaning and Painting Existing Steel

The existing structural steel shall be cleaned per near white blast cleaning, SSPC-SP10, and 5.

Structures".

accordance with IDOT GBSP 21 "Cleaning and Painting Contact Surface Areas of Existing

All new structural steel shall be shop primed, and faying surfaces shall be prepared in 4.

the pay item "Cleaning and Painting Structural Steel".

The color of the final finish coat shall match Munsell Glossy 5B 7/1 Gray. Cost included in

All new and existing steel shall be cleaned and painted utilizing Paint System 1 - OZ/E/U. 3.

"Containment and Disposal of Lead Paint Cleaning Residues".

precautions to deal with the presence of lead on this project. See Special Provisions

The existing structural steel coating contains lead. The Contractor shall take appropriate 2.

of the East and West Leaf trunnion girders.

trusses, the bottom 10'-0" of the East and West Leaf anchor columns, and the entire length

The Contractor shall clean and paint all components of the East and West Leaf carrying 1.

Sheets S104-S135 for Erect Structural Steel.

Calculated weight of Erect Structural Steel = 146,100 Lbs (includes 10% for bolts). See 4.

bolts). See Sheets S136-S140 and S202-S209 for Furnish and Erect Structural Steel.

Calculated weight of Furnish and Erect Structural Steel = 73,430 Lbs (includes 10% for 3.

domestically applied.

application of all coatings, epoxy, galvanizing, painting, etc. to metal products shall be

certification that all iron or steel materials meet these domestic source requirements. The

obtain from the iron or steel producer and/or fabricator, in addition to the mill analysis, a

projects shall be domestically manufactured and produced or fabricated. The Contractor shall

Domestic Steel Act: All iron and steel products which are to be incorporated into state 2.

open holes, unless otherwise noted.

Fasteners shall be ASTM A325 Type 1, Mechanically Galvanized Bolts. Bolts ‡"} with •"} 1.

2

CONSULTANT

DRAWN

CHECKED

APPROVED

DATE

SCALE

CONTRACT NO.

SHEET NO.


REVISIONS


CITY OF CHICAGO


RLR

PROJECT NO. E-4-712

MAH/TW

12/13/2017

JMS

N.T.S.

42'-0" 3'-0"3'-0"7'-0"

3'-

5"

RLR BID ADDENDUM 22/22/2018

OF 77 SHEETS77A

2


STRUCTURAL REPAIRS

CHICAGO RIVER



S503

~ Bascule Bottom Chord ~ Carrying Truss

~ Bascule Bottom Chord~ Carrying Truss

~ Machinery Girder

~ Trunnion Girder


A

A

PLAN

ACCESS PLATFORM

TRUNNION GIRDER

~ Access Platform

East Leaf Opp. HandWest Leaf Shown

See Sheet S504

Chord Walkway

Movable Leaf Bottom

See Sheet S504

Chord Walkway

Movable Leaf Bottom

See Sheets S506-S507

Access Platform

Trunnion Girder

REFERENCE FILESCOMPONENT

CARRYING TRUSS TOP CHORD 1660290545 & 1660290546

MOVABLE LEAF BOTTOM CHORD 1660290453

TRUNNION GIRDER 1660290549

See Sheet S505

Pinion Shaft

Platform Over Main

Entire Sheet2

CONSULTANT

DRAWN

CHECKED

APPROVED

DATE

SCALE

CONTRACT NO.

SHEET NO.


REVISIONS


CITY OF CHICAGO


RLR

PROJECT NO. E-4-712

MAH/TW

12/13/2017

JMS

N.T.S.

1'-11"3'-0"

13'-11"6'-4"

5'-

3"

8'-

11"

|5'-0"

|5'-0"

3'-

6"

4'-

6"

1'-9"

11'-0"

|1'-0"

RLR BID ADDENDUM 2

(V.I.F.)

7Š"

(V.I.F.)

7Š"

Max.

1'-0"

|5'-8" (V.I.F.)

|10"

2/22/2018

OF 77 SHEETS77B

2


STRUCTURAL REPAIRS

CHICAGO RIVER



~ Trunnion & Trunnion Girder

East Leaf Bascule (Opp. Hand)West Leaf Bascule

HANDRAIL DETAIL

B

B

Post L2•x2•X‚

‰

‰

‰

‰

Top Rail L2•x2•x‚

‰

‰

BOTTOM CHORD WALKWAY SECTION

SECTION A-A

BOTTOM CHORD WALKWAY SECTION

SECTION B-B

Match Exist. Rivet Holes

w/ (2)-‡"} Bolts

Attach Post to Bottom Chord

S504

Midrail `‚"x2•"

Toeboard `‚"x3•"

of existing rivets.

Contractor shall field verity location

exist rivets in the Bottom Chord.

Guardrail posts shall align with the

Note:

Diamond Plate

…"x20"

T/ Movable Leaf Bottom Chord

(Typ.)

Rivet Hole

Match Exist.

‡"} Bolt

SECTIONS & DETAIL

BOTTOM CHORD WALKWAY

MOVABLE LEAF

shown for clarity.

Handrail and platform step not

Note:

Plate Shall be 8'-8•".

Length of 2'-0". Total Length of

Plates. Plates Shall Have a Max.

& Replace w/ …"x20" Diamond

Remove (7)-Pairs of Lacing Bars

Entire Sheet2REFERENCE FILESCOMPONENT

MOVABLE LEAF BOTTOM CHORD 1660290453

12

1ƒ

CONSULTANT

DRAWN

CHECKED

APPROVED

DATE

SCALE

CONTRACT NO.

SHEET NO.


REVISIONS


CITY OF CHICAGO


RLR

PROJECT NO. E-4-712

MAH/TW

12/13/2017

JMS

N.T.S.

4"

•"

•"

2"

3•"

1ƒ"

1•"

5" 1'-1•

"

1•"

1•"

1ƒ"

6"

1•"

2‚"

4•"

3"

2'-6"

1'-3"

6'-

4"

(8)-

Spa.

@ 1'-0" = 8'-

0"

(5)-

Spa.

@ 1'-0" = 5'-

0"

1'-4"

1'-4"

2'-0"

1'-1•

"

1•"

1•"

1ƒ"

6"

1•"

4ƒ

"

3"

4•"

3'-10"

6'-4"

2'-0"

2'-6"

•"

•"

RLR BID ADDENDUM 2

3'-

2"

9"

V.I.F.

1"R

1'-4" (Typ.)

1ƒ"

3"

4"

1•"

(V.I.F.)

2‰"

6"

6"

2/22/2018

OF 77 SHEETS77C

2


STRUCTURAL REPAIRS

CHICAGO RIVER



Flange Below

in Carrying Truss Top

Match Existing Rivet Hole

•"x2‰" for ‡"}

`…"x3•"x0'-6‚"

`…"x3•"x0'-5"

Ladder Leg

L2•x2•x…

Top Flange Below

Secure to Carrying Truss

ƒ"} Bolt

ƒ"} Bolt (Typ.)

`…"x6"x1'-1•"

Truss

~ Carrying

L6x4x… (Typ.)

Handrail Post (Typ.)

L2•x2•x‚

Bascule Bottom Chord

Ladder Down to

Top Chord

Carrying Truss

Ladder Down to

PLAN SOUTH ELEVATION

L6x4x…

(Typ.)

L2•x2•x‚

(Typ.)

L2•x2•x‚(Typ.)

ƒ"} Ladder Rung

ƒ"} Bolt (Typ.)

L6x4x3/8

`…"x6"x1'-1•"

(Typ.)

L3x3x… Post

(Typ.)

L3x3x… Post

L3x3x… L3x3x…

Platform Leg

L3x3x…

(Typ.)

L3x3x… Post

‰

‰

‰Typ.

(Typ.)

ƒ"} Ladder Rung

‰Typ.

Detail 3 (Typ.)Detail 4 (Typ.)

S505

PLAN, ELEVATIONS & DETAILS

MAIN PINION SHAFT

PLATFORM OVER

Accommodate Rivet Head.

Shims as Required to

Provide Cheese ` or Finger

Top Flange Below to Remain.

Exist. Rivet in Carrying Truss

L6x4x…


PLATFORM BASE PLATE

DETAIL 1

LADDER BASE

DETAIL 2

Detail 1 (Typ.)

Detail 1 (Typ.) Detail 2 (Typ.)

(Typ.)

Shim as Required.

w/ (2)-ƒ"} Bolts.

Attach to Ladder Post

Match Exist. Rivet Holes.

(2)-‡"} Bolts.

Carrying Truss w/

Clip Angles. Attach to

Carrying Truss w/ …"

Attach Ladder Post to

D D


Leaf Bottom Chord

1'-0" Max. to Top of Movable

(Typ.)

Leg (Typ.)

of L3x3 Horizontal

Remove 3" Length

L6x4x…

Looking Up

(Typ.)

L2•x2•x‚

ƒ" Bolt (Typ.)

PLATFORM CONNECTION

DETAIL 3

PLATFORM CONNECTION

DETAIL 4

C C C C

UPPER LADDER CONNECTION

SECTION C-C

Entire Sheet2REFERENCE FILESCOMPONENT

CARRYING TRUSS TOP CHORD 1660290545 & 1660290546

(Typ.)

L3x3x…x0'-7"

WEST ELEVATION - WEST PIT

EAST ELEVATION - EAST PIT

(Similar-See Sheet S506)

CONSULTANT

DRAWN

CHECKED

APPROVED

DATE

SCALE

CONTRACT NO.

SHEET NO.


REVISIONS


CITY OF CHICAGO


RLR

PROJECT NO. E-4-712

MAH/TW

12/13/2017

JMS

N.T.S.

22'-ƒ"

1'-1"

1'-11•" 5'-9" 5'-9" 5'-9" 2'-10‚"

3'-

0"

1'-8"

6'-

4"

6'-4"

5'-4" 1'-0"

3„"

6„"

1'-0"

(5)-

Spa.

@ 1'-0" = 5'-

0"

6'-4"

2'-7" 10„" 1†"2•"

3'-3"

(Typ.)

1•"*

22'-4"

(Typ.)

•" Gap

(V.I.F.)

6"

(V.I.F.)

6"

(V.I.F.)

1†"

6"

3'-0"

3'-

6"

1'-9"

2'-6ƒ" (V.I.F.)

RLR BID ADDENDUM 2

3'-

7‡

"

3"

1•"

1"R

1'-4"

6'-

6‚" (V.I.F.)

2/22/2018

OF 77 SHEETS77D

2


STRUCTURAL REPAIRS

CHICAGO RIVER



Platform Ends

* 2" @ Brackets atPLATFORM BRACKET DETAIL

WT6x13x6'-4"

WT6x13 Bracket

(Typ.)

L4x4x…x0'-9„"

ƒ"} Bolt (Typ.)

Top Flange

Carrying Truss

(Typ.)

Exist. Rivet Hole

‡"} Bolt. Match

L2•x2•x‚ (Typ.)

(Typ.)

Exist. Rivet Holes

‡"} Bolts. Match

w/ (2)-ƒ"} Bolts

to Platform Stringer

Attach Ladder Post

Bracket (Typ.)

WT6x13 Platform

ƒ"} Ladder Rung (Typ.)

(Typ.)

L2•x2•x‚ Ladder Post

Stringer (Typ.)

L6x4x… Platform

(Typ.)

L6x4x…x22'-4" Platform Stringer

(Typ.)

L2•x2•x… Handrail Post

‰

‰

‰

‰

Top Rail L2•x2•x‚

L6x3x… Stringer

Spaced @ 5'-0" Max.

Post L2•x2•X‚

SECTION E-E

w/ (2)-ƒ"} Bolts

Attach Post to Stringer

E

E

SECTION D-D

D

D

TOP CONNECTION

TRUNNION BEARING ACCESS LADDER

DETAIL 5

See Detail 5

Access Ladder

Trunnion Bearing

S506

PLAN, SECTIONS & DETAILS

ACCESS PLATFORM

TRUNNION GIRDER

F

F

Midrail `‚"x 2•"


East Leaf Opp. HandWest Leaf Shown Platform grating not shown for clarity.

Note:

See Section D-D

Platform Handrail

See Notes on S507

1•" FRP Grating

See Notes on S507

1•" FRP Grating

ƒ"} Bolts (Typ.)

Only

Bottom Chord

Movable Leaf

Clip WTs Above

Step

(Typ.)

(Typ.)

Horiz. Leg

Remove L4x4

See Detail 5

Ladder Connection

Entire Sheet2

CONSULTANT

DRAWN

CHECKED

APPROVED

DATE

SCALE

CONTRACT NO.

SHEET NO.


REVISIONS


CITY OF CHICAGO


RLR

PROJECT NO. E-4-712

MAH/TW

12/13/2017

JMS

N.T.S.

1'-11‚"

4„"

1'-0" 1'-6"

1•"

1•"

6"

9"(Typ.)

1•"

RLR BID ADDENDUM 2

3"

6"

1"R

2/22/2018

OF 77 SHEETS77E

2


STRUCTURAL REPAIRS

CHICAGO RIVER



(Typ.)

WT6x13 Bracket

(Typ.)

L6x4x…x1'-9"

1•" FRP Grating

1•" FRP Grating

(Typ.)

WT6x13 Bracket

1•" FRP Grating

Entrance

Cut Vertical Leg at Platform

L6x4x… Platform Stringer

Entrance

Cut Vertical Leg at Platform

L6x4x… Platform Stringer

L6x4x…x1'-9" (Typ.)

1•" FRP Grating

(Typ.)

ƒ"} Bolt

S507

PLATFORM STEP

SECTION F-F

PLATFORM STEP

SECTION G-G

SECTIONS

ACCESS PLATFORM STEP

TRUNNION GIRDER

G

G

FIBER REINFORCED POLYMER (FRP) GRATING NOTES:

REFERENCE FILESCOMPONENT

TRUNNION GIRDER 1660290549

Entire Sheet2

provided.

separate, similar successful installations in the last five (5) years shall be

systems. Additionally, if required, a record of at least five (5) previous,

years of experience in the design and manufacture of similar products and

The grating shall be furnished by manufacturers having a minimum of ten (10) 8.

specifications.

The installation procedure used shall be according to the manufacturer's 7.

erection plans, full details, dimensions, and hardware details.

review and approval. The submittal shall include but shall not be limited to

Shop drawings and calculations shall be submitted to the Comissioner for 6.

load. Deflection is not to exceed L/360.

system are as follows: 50 psf uniform live load or 1000 lbs concentrated live

the design loads for the grating. The design loads for the FRP grating

The manufacturer's published safe recommended loads shall be greater than 5.

of Type 316 SS (stainless steel).

recommendations. All mechanical grating clip assemblies shall be manufactured

The grating shall be attached to supporting members per the manufacturer's 4.

less when tested in accordance with ASTM E-84.

FRP grating shall contain fire retardant with a flame spread rating of 25 or 3.

rods should be below the walking surface of the grating.

two- piece cross rod system to provide a mechanical and chemical lock. Cross

degradation. Bearing bars shall be interlocked and epoxied in place with a

resin rich surface which improves corrosion resistance and resistance to UV

surface of the product shall be provided with a surfacing veil to provide a

reinforcements shall be 60% to 70% of the material weight. The finished

ultraviolet (UV) inhibitors included in the resin formulation. Glass fiber

components shall be manufactured from isophthalic polyester resin with

The grating shall consist of pultruded FRP structural components. These 2.

the pay item "Furnish and Erect Structural Steel".

The cost of furnishing and installing the FRP grating shall be incidental to 1.

for approval.

quality may be submitted with the proper supporting data to the Commissioner

Other products of equal strength, stiffness, corrosion resistance, and overall 13.

materials comply with these notes.

The Contractor must provide a manufacturer's written certification the 12.

in amounts greater that allowed by current EPA requirements.

(6) months old that material proposed as a solution do not contain heavy metal

The manufacturer shall provide proof, via independent testing less than six 11.

and AARR).

quality assurance programs for its facilities or products (UL, DNV, ABS, USCG,

The manufacturer shall provide proof of certification from at least two (2) 10.

The manufacturer shall be certified to the ISO 9001-2000 standard.9.