151 First Side Pittsburgh, PA introduction introduction overview - - PowerPoint PPT Presentation

151 First Side

Pittsburgh, PA

introduction

• verview

introduction proposal structural depth acoustics breadth cm breadth conclusions

William J. Buchko

Structural Option

Senior Thesis

151 First Side William J. Buchko

Senior Thesis April 14th, 2008 Advisor: Kevin Parfitt

Presentation Outline Presentation Outline

Overview

introduction

• verview

Overview Proposal Structural Depth

introduction proposal structural depth

Structural Depth Acoustics Breadth

acoustics breadth cm breadth

Construction Management Breadth Conclusions

conclusions

Acknowledgements Questions

151 First Side William J. Buchko

Q

Overview Overview

Location:

introduction

• verview

Pittsburgh, PA

Significance:

• verview

proposal structural depth

S g ca ce

First condominium built downtown since

1968

acoustics breadth cm breadth

Architecture:

18 stories

82 it

conclusions

82 units Open floor plan 233,000 SF

151 First Side William J. Buchko

233,000 SF

Overview Overview

Mechanical:

introduction

• verview

36.7 Ton roof top unit by AAON Individual heat pumps

• verview

proposal structural depth

Electrical:

120/208 3 phase system

acoustics breadth cm breadth

1800a main switch

Lighting:

conclusions

Incandescent downlights in units Fluorescent downlights and wall

washers in corridors and public areas

151 First Side William J. Buchko

p

Overview Overview

Construction:

introduction

• verview

Construction:

$24M construction cost Owned by Zambrano Corp., Ralph

• verview

proposal structural depth

• A. Falbo, Inc., and EQA Landmark

Communities

Design-build construction

acoustics breadth cm breadth

Design-build construction

Structural:

Hambro composite joist floor system

conclusions

Hambro composite joist floor system Braced frame and moment

connection lateral system

151 First Side William J. Buchko

y

Proposal Proposal

Structural Depth

introduction

• verview

p

Decrease cost and increase

performance by using typical structural systems

proposal structural depth

systems

Acoustics Breadth

Analyze proposed systems and check

proposal acoustics breadth cm breadth

Analyze proposed systems and check

existing systems for acoustical quality

Construction Management Breadth

conclusions

Construction Management Breadth

Analyze and compare proposed

systems to current systems

151 First Side William J. Buchko

Structural Depth Structural Depth

Floor System

introduction

• verview

Floor System

Current Hambro MD2000 composite

joist system compared to a typical it b t

proposal structural depth

composite beam system

Lateral System

structural depth acoustics breadth cm breadth

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 aced frame, and moment connection systems

151 First Side William J. Buchko

Structural Depth Structural Depth

Current Hambro floor system

introduction

• verview

Current Hambro floor system

3¼” concrete on metal decking Supported by joist with composite

proposal structural depth

Supported by joist with composite top chord

structural depth acoustics breadth cm breadth conclusions 151 First Side William J. Buchko

Structural Depth Structural Depth

Proposed composite steel system

introduction

• verview

Proposed composite steel system

4” light weight concrete on B-LOK

decking with 1 stud/ft

proposal structural depth

g

Beams placed at third points of bays

structural depth acoustics breadth cm breadth conclusions 151 First Side William J. Buchko

Structural Depth Structural Depth

introduction

• verview

proposal structural depth structural depth acoustics breadth cm breadth conclusions 151 First Side William J. Buchko

Typical floor beam layout and design

Structural Depth Structural Depth

introduction

• verview

proposal structural depth structural depth acoustics breadth cm breadth conclusions 151 First Side William J. Buchko

Column redesign

Structural Depth Structural Depth

Current lateral system

introduction

• verview

Current lateral system

Combination of braced frames and

moment connections

proposal structural depth structural depth acoustics breadth cm breadth conclusions 151 First Side William J. Buchko

Structural Depth Structural Depth

introduction

• verview

proposal structural depth structural depth acoustics breadth cm breadth conclusions 151 First Side William J. Buchko

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

Structural Depth Structural Depth

introduction

• verview

proposal structural depth structural depth acoustics breadth cm breadth conclusions 151 First Side William J. Buchko

Frames long grids E and F in east-west direction

Structural Depth Structural Depth

Concrete core lateral system

introduction

• verview

Concrete core lateral system

Utilizes concrete core to handle all

lateral loading

proposal structural depth

g

Unacceptable due to interaction of

trades

structural depth acoustics breadth cm breadth conclusions 151 First Side William J. Buchko

Structural Depth Structural Depth

Braced frame lateral system

introduction

• verview

Braced frame lateral system

Utilizes braced frames for all lateral

loading

proposal structural depth

g

Quicker installation Low torsion due to design

structural depth acoustics breadth cm breadth

g

Unacceptable due to diagonal

braces within floor plan

conclusions 151 First Side William J. Buchko

Structural Depth Structural Depth

introduction

• verview

proposal structural depth structural depth acoustics breadth cm breadth conclusions 151 First Side William J. Buchko

Proposed braced frame layout

Structural Depth Structural Depth

Moment connection lateral system

introduction

• verview

Moment connection lateral system

Utilizes moment connections for all

lateral loading

proposal structural depth

g

Fully restrained connections

recommended for greater than 10

structural depth acoustics breadth cm breadth

stories

Unacceptable due to cost and

scheduling of fully restrained

conclusions

scheduling of fully restrained connections

151 First Side William J. Buchko

Acoustics Breadth Acoustics Breadth

Floor system

introduction

• verview

Floor system

Compare current Hambro system to

proposed composite beam system

proposal structural depth

p p p y

Mechanical system

Analyze current issues and provide

acoustics breadth cm breadth

Analyze current issues and provide

alternative solutions

acoustics breadth conclusions 151 First Side William J. Buchko

Acoustics Breadth Acoustics Breadth

Current Hambro floor system

introduction

• verview

Current Hambro floor system

STC of 57 IIC of 30

proposal structural depth

IIC of 30

Susceptible to structure born sound Susceptible to “wave” phenomenon

acoustics breadth cm breadth

Susceptible to wave phenomenon

acoustics breadth conclusions 151 First Side William J. Buchko

Acoustics Breadth Acoustics Breadth

Proposed beam floor system

introduction

• verview

Proposed beam floor system

STC of 55 IIC of 35

proposal structural depth

IIC of 35

Potential for better low end

absorption

acoustics breadth cm breadth

Not susceptible to “wave”

phenomenon

acoustics breadth conclusions 151 First Side William J. Buchko

Acoustics Breadth Acoustics Breadth

Mechanical system

introduction

• verview

Mechanical system

Roof top unit in direct line of sight

with penthouse terraces

proposal structural depth

p

Most common complaint from

workers and potential tenants

acoustics breadth cm breadth acoustics breadth conclusions 151 First Side William J. Buchko

Acoustics Breadth Acoustics Breadth

Existing sound levels

introduction

• verview

Existing sound levels

AAON representative unable or

unwilling to provide acoustical data

proposal structural depth

g p

Data obtained through IVIE IE-33

Pocket PC and similar unit

acoustics breadth cm breadth

Values were confirmed by 3rd party

acoustician

acoustics breadth conclusions 151 First Side William J. Buchko

Acoustics Breadth Acoustics Breadth

introduction

• verview

proposal structural depth acoustics breadth cm breadth acoustics breadth conclusions 151 First Side William J. Buchko

IVIE IE-33 Graph

Acoustics Breadth Acoustics Breadth

Proposed solutions

introduction

• verview

Proposed solutions

Acoustical barrier would only provide

6dB reduction

proposal structural depth

System can be relocated to minimize

sound levels on terraces

acoustics breadth cm breadth acoustics breadth conclusions 151 First Side William J. Buchko

Acoustics Breadth Acoustics Breadth

introduction

• verview

proposal structural depth acoustics breadth cm breadth acoustics breadth conclusions 151 First Side William J. Buchko

Proposed roof top unit relocation

Acoustics Breadth Acoustics Breadth

Relocation effects

introduction

• verview

Relocation effects

30ft gives 15dB reduction Nosier supply intake now faces

proposal structural depth

Nosier supply intake now faces away from all occupied spaces

Two walls separate unit from

acoustics breadth cm breadth

terraces, adding approximately 20dB

• f reduction

acoustics breadth conclusions 151 First Side William J. Buchko

Construction Management Breadth

Schedule

introduction

• verview

Schedule

Compare scheduling impacts of

proposed systems both on and off of

proposal structural depth

p p y the critical path

Cost

acoustics breadth cm breadth

Cost

Compare cost of proposed systems

to current systems

cm breadth conclusions

y

151 First Side William J. Buchko

Construction Management Breadth

Schedule

introduction

• verview

Schedule

Steel placement takes 177 days and

is unaffected by floor system change

proposal structural depth

Pouring of proposed floor system

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

acoustics breadth cm breadth

floor, though not on the critical path

A potential 10 days could be saved

through fire protection

cm breadth conclusions

The braced frame lateral system

could save 5 days along critical path, but was found to be unacceptable

151 First Side William J. Buchko

p

Construction Management Breadth

Cost

introduction

• verview

Larger slab and more expensive

concrete offset with cheaper steel, resulting in a similar cost between floor

proposal structural depth

resulting in a similar cost between floor systems

Redesign of columns and beams save

131 T f t l hi h

acoustics breadth cm breadth

131 Tons of steel, which saves approximately $228,000

Labor savings estimated at

cm breadth conclusions

approximately $30,000

Total system savings over 1% of total

building cost

151 First Side William J. Buchko

bu d g cost

Conclusions Conclusions

Structural Depth

introduction

• verview

A composite beam floor system would be both

feasible and economical to use

No better lateral system was found

proposal structural depth

Acoustics Breadth A composite beam floor system could provide

equal acoustical qualities

Mechanical system can be moved to provide a

acoustics breadth cm breadth

Mechanical system can be moved to provide a

better sound level on outdoor terraces

Construction Management Breadth All proposed systems could be implemented

conclusions

All proposed systems could be implemented

without a change in the critical path

All proposed systems would be similar in cost or

less expensive

conclusions 151 First Side William J. Buchko

Acknowledgements Acknowledgements

I would like to thank the following i d i di id l

introduction

• verview

companies and individuals:

Zambrano Corp. The Kachele Group

proposal structural depth

The Kachele Group Indovina Associates Architects Hambro Systems Cenkner Engineering Associates Inc

acoustics breadth cm breadth

Cenkner Engineering Associates, Inc. Professor Kevin Parfitt Professor Moses Ling The Thesis Mentors

conclusions

The Thesis Mentors Family and friends for their support and

understanding

conclusions 151 First Side William J. Buchko

Dedication Dedication

This Thesis presentation and year long project i d di t d t th f

introduction

• verview

is dedicated to the memory of:

proposal structural depth acoustics breadth cm breadth

Nicholas Buchko

conclusions

Nicholas Buchko 9/15/15 – 12/6/06 “Never give up.”

conclusions 151 First Side William J. Buchko

Questions? Questions?

introduction

• verview

proposal structural depth acoustics breadth cm breadth conclusions conclusions 151 First Side William J. Buchko