151 First Side - Pennsylvania State University...151 First Side Pittsburgh, PA introduction overview proposal structural depth acoustics breadth cm breadth conclusions William J. Buchko

151 First SidePittsburgh, PA

introduction

overview

introduction

proposal

structural depth

acoustics breadth

cm breadth

conclusions William J. BuchkoStructural Option

Senior Thesis

151 First Side William J. Buchko

Senior ThesisApril 14th, 2008

Advisor: Kevin Parfitt

Presentation OutlinePresentation Outline

Overviewintroduction

overview

OverviewProposalStructural Depth

introduction

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Structural DepthAcoustics Breadth

acoustics breadth

cm breadth

Construction Management BreadthConclusions

conclusionsAcknowledgementsQuestions


Q

OverviewOverview

Location: introduction

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Pittsburgh, PA

Significance: overview

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S g ca ceFirst condominium built downtown since 1968

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Architecture: 18 stories82 it

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82 unitsOpen floor plan233,000 SF


233,000 SF

OverviewOverview

Mechanical:introduction

overview

36.7 Ton roof top unit by AAONIndividual heat pumpsoverview

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Electrical:120/208 3 phase system

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1800a main switch

Lighting:

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Incandescent downlights in unitsFluorescent downlights and wall washers in corridors and public areas


p

OverviewOverview

Construction:introduction

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Construction:$24M construction costOwned by Zambrano Corp., Ralph overview

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A. Falbo, Inc., and EQA Landmark CommunitiesDesign-build construction

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Design-build construction

Structural:Hambro composite joist floor system

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Hambro composite joist floor systemBraced frame and moment connection lateral system


y

ProposalProposal

Structural Depthintroduction

overview

pDecrease cost and increase performance by using typical structural systems

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systems

Acoustics BreadthAnalyze proposed systems and check

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Analyze proposed systems and check existing systems for acoustical quality

Construction Management Breadthconclusions

Construction Management BreadthAnalyze and compare proposed systems to current systems


Structural DepthStructural Depth

Floor Systemintroduction

overview

Floor SystemCurrent Hambro MD2000 composite joist system compared to a typical

it b tproposal

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composite beam system

Lateral Systemstructural depth

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Current combination braced frame and moment connection system compared to concrete core, braced

conclusions

co pa ed o co c e e co e, b acedframe, and moment connection systems



Current Hambro floor systemintroduction

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Current Hambro floor system3¼” concrete on metal deckingSupported by joist with composite

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Supported by joist with composite top chord

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Proposed composite steel systemintroduction

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Proposed composite steel system4” light weight concrete on B-LOK decking with 1 stud/ft

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gBeams placed at third points of bays

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introduction

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structural depthstructural depth

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Typical floor beam layout and design


introduction

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Column redesign


Current lateral systemintroduction

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Current lateral systemCombination of braced frames and moment connections

proposal


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introduction

overview

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Frames long grids 2, 3, and 4 in north-south direction


introduction

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Frames long grids E and F in east-west direction


Concrete core lateral systemintroduction

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Concrete core lateral systemUtilizes concrete core to handle all lateral loading

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gUnacceptable due to interaction of tradesstructural depth

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Braced frame lateral systemintroduction

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Braced frame lateral systemUtilizes braced frames for all lateral loading

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gQuicker installationLow torsion due to designstructural depth

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gUnacceptable due to diagonal braces within floor plan

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introduction

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Proposed braced frame layout


Moment connection lateral systemintroduction

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Moment connection lateral systemUtilizes moment connections for all lateral loading

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gFully restrained connections recommended for greater than 10 structural depth

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storiesUnacceptable due to cost and scheduling of fully restrained

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scheduling of fully restrained connections


Acoustics BreadthAcoustics Breadth

Floor systemintroduction

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Floor systemCompare current Hambro system to proposed composite beam system

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p p p y

Mechanical systemAnalyze current issues and provide

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Analyze current issues and provide alternative solutionsacoustics breadth

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Current Hambro floor systemintroduction

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Current Hambro floor systemSTC of 57IIC of 30

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IIC of 30Susceptible to structure born soundSusceptible to “wave” phenomenon

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Susceptible to wave phenomenonacoustics breadth

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Proposed beam floor systemintroduction

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Proposed beam floor systemSTC of 55IIC of 35

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IIC of 35Potential for better low end absorption

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Not susceptible to “wave” phenomenon

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Mechanical systemintroduction

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Mechanical systemRoof top unit in direct line of sight with penthouse terraces

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pMost common complaint from workers and potential tenants

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Existing sound levelsintroduction

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Existing sound levelsAAON representative unable or unwilling to provide acoustical data

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g pData obtained through IVIE IE-33 Pocket PC and similar unit

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Values were confirmed by 3rd party acoustician

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introduction

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IVIE IE-33 Graph


Proposed solutionsintroduction

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Proposed solutionsAcoustical barrier would only provide 6dB reduction

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System can be relocated to minimize sound levels on terraces

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introduction

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Proposed roof top unit relocation


Relocation effectsintroduction

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Relocation effects30ft gives 15dB reductionNosier supply intake now faces

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Nosier supply intake now faces away from all occupied spacesTwo walls separate unit from

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terraces, adding approximately 20dB of reduction

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Construction Management Breadth

Scheduleintroduction

overview

ScheduleCompare scheduling impacts of proposed systems both on and off of

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p p ythe critical path

Costacoustics breadth

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CostCompare cost of proposed systems to current systemscm breadth

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y



Scheduleintroduction

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ScheduleSteel placement takes 177 days and is unaffected by floor system change

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Pouring of proposed floor system would save a minimum of 1 day per floor, though not on the critical path

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floor, though not on the critical pathA potential 10 days could be saved through fire protection

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The braced frame lateral system could save 5 days along critical path, but was found to be unacceptable


p


Costintroduction

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Larger slab and more expensive concrete offset with cheaper steel, resulting in a similar cost between floor

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resulting in a similar cost between floor systemsRedesign of columns and beams save 131 T f t l hi h

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131 Tons of steel, which saves approximately $228,000Labor savings estimated at cm breadth

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approximately $30,000Total system savings over 1% of total building cost


bu d g cost

ConclusionsConclusionsStructural Depth

introduction

overview

A composite beam floor system would be both feasible and economical to useNo better lateral system was found

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Acoustics BreadthA composite beam floor system could provide equal acoustical qualitiesMechanical system can be moved to provide a

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Mechanical system can be moved to provide a better sound level on outdoor terraces

Construction Management BreadthAll proposed systems could be implemented

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All proposed systems could be implemented without a change in the critical pathAll proposed systems would be similar in cost or less expensive

conclusions


AcknowledgementsAcknowledgementsI would like to thank the following

i d i di id lintroduction

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companies and individuals:Zambrano Corp.The Kachele Group

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The Kachele GroupIndovina Associates ArchitectsHambro SystemsCenkner Engineering Associates Inc

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Cenkner Engineering Associates, Inc.Professor Kevin ParfittProfessor Moses LingThe Thesis Mentors

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The Thesis MentorsFamily and friends for their support and understanding

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DedicationDedicationThis Thesis presentation and year long project

i d di t d t th fintroduction

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is dedicated to the memory of:

proposal

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acoustics breadth

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Nicholas Buchko9/15/15 – 12/6/06 “Never give up.”

conclusions


Questions?Questions?

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Documents

151 First Side - Pennsylvania State University...151 First Side Pittsburgh, PA introduction overview proposal structural depth acoustics breadth cm breadth conclusions William J. Buchko