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Pennsylvania State UniversityDept. of Architectural Engineering
Spring 2003Structural Option
Eric Sobel
2941 Fairview Park
2941 Fairview ParkEric Sobel
2941 Fairview ParkEric Sobel
PROJECT TEAM2941 Fairview Park
Eric Sobel
• Owner: 2941 Fairview L.L.P.• Developer: The David Orr Company• Contractor: Clark Construction• Architect: Boggs & Partners• Structural: Cagley & Associates• M.E.P.: Allen & Shariff• Envelope: PCC Consultants
BUILDING2941 Fairview Park
Eric Sobel
• $38 Million• 361,101 gross sq. ft• 15 rentable stories• Mechanical Penthouse• Basement
• Offices• Atrium• Café• Restaurant
• VAV System• Chilled Water• 65 Ton AC Units• Electric Heating Coils• Series fan VAV Units
SYSTEMS2941 Fairview Park
Eric Sobel
• Circuit Breaker Panelboards• K-4 Rated Transformers
• Electrical:
• Mechanical:
CURTAIN WALL2941 Fairview Park
Eric Sobel
• METAL PANEL
• PRECAST CONCRETE
• E-W:
• N-S:
PLAN2941 Fairview Park
Eric Sobel
TYPICAL TOWER FLOOR PLAN
• Composite A992 Steel• 5 ¼” LW Conc. On Metal Deck
• N-S: 2 Braced Frames• E-W: 5 Braced Frames & 5 Moment Frames
• Typical Spread Foundations• Buried Mat Foundation
EXISTING STRUCTURE2941 Fairview Park
Eric Sobel
• Gravity System:
• Lateral System:
• Foundations:
PLAN2941 Fairview Park
Eric Sobel
FOURTH FLOOR PLAN
• Goals:
REDESIGN2941 Fairview Park
Eric Sobel
• Increase Serviceability• Decrease Initial Cost• Decrease Construction Time• Minimal Architectural Change
• Advantages:• Quality Control• Durability• Material Strength• Architectural Finish• Quicker Erection
• Disadvantages:• Increased Weight• Transportation
OUTLINE
• Connections
2941 Fairview ParkEric Sobel
• Building Core• Gravity System• Building Envelope
• 4D CAD• Schedule• Estimate
• Members:
• Construction:
PLAN2941 Fairview Park
Eric Sobel
TYPICAL TOWER FLOOR PLAN
• 8” Hollowcore Planks• Lightweight Concrete• 6 straight ½” tendons • f’c = 5,000 psi
HOLLOWCORE PLANKS2941 Fairview Park
Eric Sobel
• 20” x 30” Inverted Tees• Normal Weight Concrete• 4” x 10” Ledges• Straight Tendons• f’c = 8,000 psi
INVERTED TEES2941 Fairview Park
Eric Sobel
COLUMNS2941 Fairview Park
Eric Sobel
• 20” x 20”• 4 floor pieces• f’c ranging from 5,000-12,000 psi• Upper Floors: Lightweight • Corbels
• Precast:
SPANDREL2941 Fairview Park
Eric Sobel
• Composition• 3” Concrete• (2) 1 ½” Insulation• Metal Facing
• Reduced Members• Bearing Connection
• Construction
WINDOWS2941 Fairview Park
Eric Sobel
• Installation• Inside• Simple
• Waussau Window System
• Goals:
FOUNDATIONS2941 Fairview Park
Eric Sobel
• Adequate Strength• Cost Effective• Rigid Support for Shearwalls• Pinned Support for Columns
• Importance:
• Goals:
CONNECTIONS2941 Fairview Park
Eric Sobel
• Define Structural Response• Influences Construction Schedule
• High Repetition• Relieve Induced Stresses• Easy Erection• Simple Formwork
BEAM - COLUMN2941 Fairview Park
Eric Sobel
• Goals:
• Description:
• Analysis:
• Diaphragm Action• Induced Stresses• Quick Erection• Columns Stability
• Mastecord Bearing Pads• Supporting Angle
• PCI Design Guide• PCHELP
• Goals:
• Description:
• Analysis:
PRECAST - SITECAST2941 Fairview Park
Eric Sobel
• Transfer Gravity & Lateral Forces• Simple Formwork
• JVI-Inc. BSF 200/40• “The Invisible Corbel”• Box cast in beam• “Knife” cast in column• Weld Plate
• JVI Design Aids
CONSTRUCTION2941 Fairview Park
Eric Sobel
DAY 1
CONSTRUCTION2941 Fairview Park
Eric Sobel
DAY 1
DAY 2
DAY 1
DAY 2
DAY 3
CONSTRUCTION2941 Fairview Park
Eric Sobel
DAY 1
DAY 2
DAY 3
DAY 4
CONSTRUCTION2941 Fairview Park
Eric Sobel
CONSTRUCTION2941 Fairview Park
Eric Sobel
DAY 1
DAY 2
DAY 3
DAY 4
DAY 5
CONSTRUCTION2941 Fairview Park
Eric Sobel
SCHEDULE2941 Fairview Park
Eric Sobel
PRECAST
COMPOSITE STEEL
• Composite Steel: $5.95 million• Precast: $6.07 million
ESTIMATE2941 Fairview Park
Eric Sobel
Steel Precast
Site Cast
Flooring
Columns
Foundations
$ M
illio
n
• Rentable Area: 650 Additional sq. ft.
CONCLUSIONS2941 Fairview Park
Eric Sobel
• Plenum Depth: Varies
• Initial Cost: Similar
• Construction Schedule: 4 Weeks Quicker
• Drift: 30% Stiffer
• Acoustics: 10 dB STL & INR
Thanks to:
THANKS2941 Fairview Park
Eric Sobel
Joe Ajello, PEJimmy Lakey, PEAll others at Cagley & AssociatesMark TayorMike PattonClement EnyejiProf’s: Parffit, Geschwindner, Boothby, & BurnetteAll other AE FacultyAE Class of 2003KarenMy Family
Questions?
2941 Fairview ParkEric Sobel
• Members
• Connections
• Construction
• Trades Affected
• East-West:
• North-South:
• General:
SHEARWALLS2941 Fairview Park
Eric Sobel
• (4) 22’-8” Shearwall• 24” Thick
• (2) Shearwall / Moment Frame Lines• 20” Thick• Deep Beams
• Locations matched existing braced frame locations• Loadbearing => R=4.0
• Location:
• Goals:
• Description:
MOMENT FRAME2941 Fairview Park
Eric Sobel
• Along grid Line H• Lower Portion
• Increase stiffness to region• Free up Space
• Site cast• Spans parallel to plank
EXPANSION JOINT2941 Fairview Park
Eric Sobel
• Goals:
• Description:
• Transfer gravity loads• Transfer E-W lateral loads• Separate N-S lateral loads
• Slotted Connector• Teflon bearing pad
GROUTED KEYS2941 Fairview Park
Eric Sobel
• Goals:
• Description:
• Member Connectivity• Diaphragm Action
•Grouted Keys
• Goals:
• Description:
• Analysis:
PLANK – INVERTED TEE2941 Fairview Park
Eric Sobel
• Diaphragm Action• Induced Stresses• Quick Erection
• Mastecord Bearing Pads• Supporting Angle
• PCI Design Guide
• Goals:
• Description:
• Analysis:
DAPPED BEAM2941 Fairview Park
Eric Sobel
• Transfer Gravity & Lateral Forces• Simple Connection
• Mastecord Bearing Pad
• PCI Design Method• PCHELP
DAPPED BEAM2941 Fairview Park
Eric Sobel
Goals:
Description:
Analysis:
COLUMN SPLICE2941 Fairview Park
Eric Sobel
• Aesthetically pleasing• Transfer only axial and shear loads• Simple erection
• Bolted connection• Grouted• Splice occurs just above floor level
• PCI design aids
• Architectural Atrium• Entrance Plaza• ME/TC rooms per floor• Tenant Build-Out• Superb Landscaping
FEATURES2941 Fairview Park
Eric Sobel
• General:
• Core:
• Windows:
SCHEDULE2941 Fairview Park
Eric Sobel
•20 columns / day•20 beams / day•40 planks / day•Core: 1 level / week•Windows: 1 level / week
•2 weeks ahead
•2 weeks behind
DETAIL2941 Fairview Park
Eric Sobel
BUILDING END DETAIL
CRANES2941 Fairview Park
Eric Sobel
TRANSPORTATION2941 Fairview Park
Eric Sobel
TRADES AFFECTED2941 Fairview Park
Eric Sobel
TRADES AFFECTED2941 Fairview Park
Eric Sobel