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