matthew kutzler - engr.psu.edu · campus square – buildings c and d matthew kutzler –...

Matthew Matthew KutzlerKutzler

Buildings C and DBuildings C and DCampus Square, Lehigh UniversityCampus Square, Lehigh University

Bethlehem, PABethlehem, PA

Structural OptionStructural OptionSpring 2004Spring 2004

Campus Square Campus Square –– Buildings C and DBuildings C and D Matthew Matthew KutzlerKutzler –– StructuralStructural

Campus Square Campus Square –– Buildings C and DBuildings C and D

Located at Lehigh University Located at Lehigh University in Bethlehem, PAin Bethlehem, PAComplex consists of four Complex consists of four dormitories and a parking dormitories and a parking deckdeckBuildings A and D are Buildings A and D are structurally similar, as well structurally similar, as well as Buildings B and Cas Buildings B and C


LocationLocation


Presentation ContentsPresentation Contents

Building OverviewBuilding OverviewProposalProposalBreadth: AcousticsBreadth: AcousticsDepth: StructuralDepth: StructuralBreadth: Construction Breadth: Construction ManagementManagementConclusionsConclusionsAcknowledgementsAcknowledgementsQuestionsQuestions


Building OverviewBuilding Overview

Project TeamProject Team–– Owner:Owner: Lehigh University Lehigh University –– Architect:Architect: BohlinBohlin CywinskiCywinski Jackson Jackson –– Mechanical/Plumbing/Electrical:Mechanical/Plumbing/Electrical: BrinjacBrinjac

Engineering,Engineering, Inc. Inc. –– Civil and Structural:Civil and Structural:

Barry Barry IsettIsett & Associates & Associates –– Construction Construction

Management:Management: Alvin H. Alvin H. ButzButz



StatisticsStatistics–– Function:Function: residential and retailresidential and retail–– Zoning:Zoning: building height limited to 70 ftbuilding height limited to 70 ft–– Total cost:Total cost: $23 million $23 million –– Building C:Building C:

49,565 sq ft (multipurpose 49,565 sq ft (multipurpose -- 18,010 sq ft)18,010 sq ft)Floors 1Floors 1--2: campus bookstore; 32: campus bookstore; 3--5: apartments5: apartments

–– Building D:Building D:30,654 sq ft 30,654 sq ft Floors 1Floors 1--3: apartments3: apartments



ArchitectureArchitecture–– 250 beds in double, triple, and quad apartments250 beds in double, triple, and quad apartments–– FloorFloor--toto--ceiling height is 8’ceiling height is 8’–– Red brick faceRed brick face–– Aluminum Aluminum

storefront storefront framingframing



Floor PlanFloor Plan



Structural Structural –– GravityGravity–– Building C: Building C:

Steel frame on floors Steel frame on floors 11--33Load bearing Load bearing masonry walls on masonry walls on floors 4floors 4--5 5 8” 8” precastprecast hollow hollow core plankcore plankTypical bays are 20’ Typical bays are 20’ x 20’x 20’



Structural Structural –– GravityGravity–– Building D: Building D:

Load bearing masonry walls Load bearing masonry walls 8” 8” precastprecast hollow core plankhollow core plank



StructuralStructural–– Foundations: Foundations:

Continuous strip footings along the perimeterContinuous strip footings along the perimeterInterior spread and combined footingsInterior spread and combined footings

–– Lateral: Lateral: 8” concrete masonry shear walls8” concrete masonry shear walls


ProposalProposal

Criteria to maintainCriteria to maintain–– FloorFloor--toto--ceiling heightceiling height–– Current floor planCurrent floor plan–– Architectural schemeArchitectural scheme

GoalsGoals–– FramingFraming–– FoundationsFoundations–– Lateral systemLateral system–– VibrationVibration–– Fire ProtectionFire Protection–– AcousticsAcoustics–– Construction Construction

ManagementManagement


AcousticsAcoustics

BOCA requires an STC and IIC of 45BOCA requires an STC and IIC of 45Current STC Current STC –– PrecastPrecast plank:plank: 5858–– Masonry walls and partitions:Masonry walls and partitions: 5252

Current IICCurrent IIC–– PrecastPrecast plank:plank: 5050

Dictates slab thickness of proposed systems Dictates slab thickness of proposed systems –– 4” slab:4” slab: STC= 44 IIC = 25STC= 44 IIC = 25


AcousticsAcoustics

SolutionSolution–– STC rating of 60STC rating of 60–– IIC of 59IIC of 59–– Floorboard reduces Floorboard reduces

airborne and impact airborne and impact noisenoise


Structural Structural –– Pan Joist SystemPan Joist System

SlabSlab–– 4 4 ksiksi normal weight concretenormal weight concrete–– 3.5” (1 hour fire rating)3.5” (1 hour fire rating)–– #3 @ 12” #3 @ 12” o.co.c..

JoistsJoists–– 40” pans40” pans–– 12” x 8”12” x 8”–– 2 2 -- #6 top and bottom#6 top and bottom–– #3 @ 12” #3 @ 12” o.co.c. for shear. for shear



#5 @ 12"3 - #65 - #81320d

#5 @ 12"2 - #67 - #6620c

#4 @ 6"4 - #65 - #82020b

#4 @ 12"4 - #55 - #71020a

Shear Bottom Top TributaryWidth (ft)Span (ft)Girder

Girder Reinforcement



ColumnsColumns– A: 20’ x 10’ … exterior– B: 20’ x 13’ … corridor– C: 20’ x 20’ … interior,

other than the corridor– 18” x 18”– 4 - #9’s



12 #8 E.W. (T + B)2'-4"12 #8 E.W.2'-0"12' x 12'C (spread)

#9 @ 12“ E.W.(T + B)2'-6"#9 @ 12" E.W.2'-6"16‘ x 12'B (comb.)

9 #7 E.W. (T + B)2'-4"9 #7 E.W.1'-6"9' x 9'A (spread)

Reinf.DepthReinf.DepthSizeColumn

SpecifiedCalculated

Typical Footings



LateralLateral–– Shear walls removedShear walls removed–– Total drift:Total drift: 0.515” < 1.53” 0.515” < 1.53”

VibrationVibration–– No calculation neededNo calculation needed

Fire ProtectionFire Protection-- 3.5” slab is adequate for one3.5” slab is adequate for one--hour fire ratinghour fire rating


Structural Structural –– Steel Joist SystemSteel Joist System

SlabSlab–– 3 3 ksiksi normal weight concretenormal weight concrete–– 4” slab on 24 gage UFS form deck4” slab on 24 gage UFS form deck–– 44 44 –– W4.0 x 4.0 welded wire fabricW4.0 x 4.0 welded wire fabric

JoistsJoists–– Apartments:Apartments: 18K3 @ 2’18K3 @ 2’--10” 10” –– Corridors:Corridors: 16K3 @ 3’16K3 @ 3’--0”0”



Beams and GirdersBeams and Girders–– Perimeter:Perimeter: W16 x 31 W16 x 31 –– Corridor:Corridor: W16 x 31W16 x 31–– Other beams:Other beams: W12 x 19W12 x 19–– Other girders:Other girders: W16 x 31 and W18 x 35W16 x 31 and W18 x 35

ColumnsColumns–– W12 x 72W12 x 72



< Bay 1< Bay 1

Bay 2 >Bay 2 >



11 #8 E.W. (T + B)2'-4"11 #8 E.W.2'-0"11' x 11’C (spread)

#9 @ 12" E.W. (T + B)2'-4"#9 @ 12" E.W.2'-4"15' x 10'B (comb.)

8 #6 E.W. (T + B)2'-4"8 #6 E.W.1'-6"8' x 8'A (spread)

Reinf.DepthReinf.DepthSizeColumn

SpecifiedCalculated

Typical Footings



ExistingExisting ProposedProposed



VibrationVibration–– AISC criteriaAISC criteria–– Apartment and corridor bays analyzedApartment and corridor bays analyzed–– Passed walking excitation criteria Passed walking excitation criteria –– Frequency was below 9 Hz so no floor stiffness Frequency was below 9 Hz so no floor stiffness

check required check required



Fire ProtectionFire Protection–– Steel joists:Steel joists: max spacing of 48” max spacing of 48” o.co.c..–– Bridging:Bridging: 1/2” diameter bars 1/2” diameter bars –– Ceiling:Ceiling: Acoustical material or gypsum boardAcoustical material or gypsum board

Design No. G205Design No. G205


Construction ManagementConstruction Management

$564,961Steel

$774,457Concrete

$595,800Existing

Cost Comparison

Cost ComparisonCost Comparison–– FramingFraming–– FloorsFloors–– FormworkFormwork


ConclusionsConclusions

xxVibration

xxFire Protection

xxAcoustics

xCrane Rental

xLateral System

xxPlenum Space

xLead Time

xxWeight

xxBuilding Height

xLabor Time

xxCost

Concrete frame and pan joists

Steel joists w/ cast-in-place slab

Existing - steel w/ precast plank

Which system has the advantage?


AcknowledgementsAcknowledgements

Barry Barry IsettIsett & Associates& Associates–– Ross Ross SotakSotak–– Jeff Jeff ThomsThoms

Alvin H. Alvin H. ButzButzLehigh UniversityLehigh University–– Tony Tony CoralloCorallo

AE FacultyAE FacultyAE ClassmatesAE ClassmatesFamily and friendsFamily and friends


Questions?Questions?

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