alcoa business services center

AlcoaAlcoaBusiness Services CenterBusiness Services Center

Pittsburgh, PennsylvaniaPittsburgh, Pennsylvania

Efficiency Considerations for

Modern DesignGeoffrey E. Measel – Structural Option 2004 Senior Thesis

Alcoa Business Services Center Alcoa Business Services Center Geoffrey Measel - StructuralGeoffrey Measel - Structural

IntroductionIntroductionThesis researchThesis research

•Structural Depth•Alternate Floor Systems

•Alternate Foundation Systems

•Core Framing For UFADS

•Mechanical Breadth•Under Floor Air Distribution System

•Construction Breadth•Direct Cost Of Each System

•Overall Building Cost

•Schedule Impact


IntroductionIntroductionPresentation OutlinePresentation Outline

Introduction Structural Depth

– Alternate Floors– Alternate Foundation– Building Impacts

Mechanical Breadth– Under Floor Redesign

Construction Management Conclusions Questions


IntroductionIntroductionProject PlayersProject Players

General Contractor: PJ Dick Inc.

Construction Manager: PJ Dick Inc.

Architects: Primary: Pfaffmann & Associates Interior: IKM Inc.

Engineers:Structural: Atlantic Engineering ServicesMechanical: Ray Engineering Electrical: Hornfeck Engineering, Inc. Site Consultant:

Civil & Environmental Consultants Inc.

Owner: Jackson Row Holdings C/O The Rubinoff Company


IntroductionIntroductionLocationLocation


IntroductionIntroductionBuilding StatisticsBuilding Statistics

Function Types:Function Types: Multi-tenant officeMulti-tenant office Ground Floor Retail Ground Floor Retail Underground Parking GarageUnderground Parking Garage

Size: Size: 228,500 NRSF228,500 NRSF 6 Stories6 Stories

Cost Information:Cost Information: Overall Cost: $26 millionOverall Cost: $26 million $19.3 million (excluding tenant fit-out work)$19.3 million (excluding tenant fit-out work)

Delivery Method: Delivery Method: Design-Bid-Build with CM at RiskDesign-Bid-Build with CM at Risk


StructuralStructuralEXISTING STEEL FRAMINGEXISTING STEEL FRAMING


StructuralStructuralexisting core framingexisting core framing


Presentation OutlinePresentation Outline Introduction Structural Depth





StructuralStructuralfloor re-designfloor re-design

Existing Composite Existing Composite My Existing (Control for Study)My Existing (Control for Study) Percentage CompositePercentage Composite

– ShoredShored– UnshoredUnshored– CamberedCambered

Non-CompositeNon-Composite JoistsJoists Pre-Cast ConcretePre-Cast Concrete



System Comparison

6.788.07 7.68

6.44 6.137.18

8.68

3.47 3.9 3.813 3.31 3.35

4.69

6.065.87

02468

10

Exi

stin

g

My

Exi

stin

g

Co

mp

osi

teU

nS

ho

red

(70

%)

Co

mp

osi

tesh

ore

d(1

00

%)

Co

mp

osi

teC

am

be

red

Pre

cast

Jois

ts

No

nco

mp

osi

te

Va

lue

/sq

. ft

Steel Weight/ sq. ft

Steel Cost/sq. ft

Floor Framing Comparison


StructuralStructuralFoundation Re-designFoundation Re-design

7.5” Diameter Mini-Pile7.5” Diameter Mini-Pile– Pall =(.4 to .5) Fy As + (.35 to .45) F’c Ac Pall =(.4 to .5) Fy As + (.35 to .45) F’c Ac

Fy =Yield Stress of Steel Casing (80ksi)Fy =Yield Stress of Steel Casing (80ksi) As =Cross-sectional area of steel casing (7.86 in2)As =Cross-sectional area of steel casing (7.86 in2) F’c =28 day Compressive Strength of grout (4000 psi)F’c =28 day Compressive Strength of grout (4000 psi) Ac =Cross-Sectional area of grout (35.78 inAc =Cross-Sectional area of grout (35.78 in22))

Mini-Piles

150 Ton Capacity

300 Piles

Existing Auger Cast Piles

95 Ton Capacity

374 Piles


StructuralStructuralCore Re-DesignCore Re-Design

Existing Core Framing Existing Core Framing My Existing (Control for Study)My Existing (Control for Study) Raised Floor FramingRaised Floor Framing Beam Raised FloorBeam Raised Floor Raised Core FramingRaised Core Framing



Existing Core Framing



Raised Floor Core

24” Raised Tate Access Floor


structuralstructuralCore Re-DesignCore Re-Design

Beam Raised Floor

W21X44 with Slab



Raised Core Framing



Raised Core Framing

Option 2 Option 1



Core Comparisons

5.05 5.28 5.337.16

5.41

8.8010.56 10.83

14.18

11.05

0.002.004.006.008.00

10.0012.0014.0016.00

AES Existing My Exsiting Raised Floor Beam RaisedFloor

Raised Core

Val

ue/

Sq

. ft

Steel Cost per Sq. ft

Steel W eight per Sq. ft

Core Framing Comparison


Presentation OutlinePresentation Outline Introduction Structural Depth





MechanicalMechanicalUnder-FloorUnder-Floor

ConCore 2000ConCore 2000 System Weight: System Weight: 11.5 lbs/sq. ft11.5 lbs/sq. ft Concentrated Load:Concentrated Load: 2000 lbs2000 lbs Uniform Load:Uniform Load: 500 lbs/sq. ft500 lbs/sq. ft Ultimate Load:Ultimate Load: 5750 lbs5750 lbs Impact Load:Impact Load: 150 lbs150 lbs

Raised Floor Design


MechanicalMechanicalDuct work Re-DesignDuct work Re-Design

Existing Duct Plan Re-Designed Duct Plan


Presentation OutlinePresentation Outline

Introduction Structural Depth





Const. MgmtConst. MgmtCost SummaryCost Summary

System Cost Comparison

1512000 1608750 1588500 15997502052000 2083500

15570001786500

0

500000

1000000

1500000

2000000

2500000

Exi

stin

g

My

Exi

stin

g

Com

posi

teU

nSho

red

(70%

)

Com

posi

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ored

(100

%)

Com

posi

teC

ambe

red

Pre

cast

Jois

ts

Non

com

posi

te

Co

st Cost

Overall Floor Framing Cost Comparison


Const. MgmtConst. Mgmtcost summarycost summary

Cost Comparison

271080 276048 287928230256

319032

050000

100000150000200000250000300000350000

AES Existing My Exsiting Raised Floor Raised Core Beam RaisedFloor

Cost

Cost

Overall Core Framing Cost Comparison



Existing Auger Cast PilesExisting Auger Cast Piles– 374 Piles *( 50’) * $30.00/ft = $561,000374 Piles *( 50’) * $30.00/ft = $561,000– Schedule: 50’ (374 piles) / 350 = 53 daysSchedule: 50’ (374 piles) / 350 = 53 days

Micro-Piles (Mini-Piles)Micro-Piles (Mini-Piles)– 300 Mini-piles*($55.00/ft) 50’ = $825,000300 Mini-piles*($55.00/ft) 50’ = $825,000

– 300 mini-piles * 50’ / 275ft/day = 54.5 days300 mini-piles * 50’ / 275ft/day = 54.5 days

Foundation Comparison



Reduction of Construction Cost:Reduction of Construction Cost:-HVAC Cost = $283,040-HVAC Cost = $283,040

Enhancement of Property Value:Enhancement of Property Value:-Tenant Re-Occupancy = $312,131

Improvement in Tenant Attractiveness:Improvement in Tenant Attractiveness:-Life Cycle Savings (1st Year) = $304,168-Staff Productivity (1st Year) = $635,400

Projected Mechanical Savings


Summary & Summary & Conclusions Conclusions Structural:Structural:

– Floor Framing: 70% Composite UnshoredFloor Framing: 70% Composite Unshored– Watch Steel Prices- 100% Comp. Watch Steel Prices- 100% Comp.

ShoredShored– Foundation: Stay with Auger Cast PilesFoundation: Stay with Auger Cast Piles

– If Schedule becomes an issue go with If Schedule becomes an issue go with Mini-PilesMini-Piles

– Core Framing: Raise the CoreCore Framing: Raise the Core

Mechanical: Under Floor Air DistributionMechanical: Under Floor Air Distribution


Special ThanksSpecial Thanks

Atlantic Engineering Atlantic Engineering ServicesServices– John SchneiderJohn Schneider– Andy VerrangiaAndy Verrangia

PJ DickPJ Dick– Frank BabicFrank Babic– Matt WetzelMatt Wetzel

Pfaffman & AssociatesPfaffman & Associates

G.E.M. Inc.G.E.M. Inc.

AE FacultyAE Faculty– Kevin ParfittKevin Parfitt– Walt SchneiderWalt Schneider– Jonathan DoughertyJonathan Dougherty

AE ClassmatesAE Classmates

My FamilyMy Family


QuestionsQuestions

?


Floor Framing Floor Framing SummarySummary



Composite Comparison

3.81 3.81 3.81 3.81 3.83 3.83 3.90 4.00

7.75 7.75 7.75 7.68 7.64 7.64 7.68 7.83

0.001.002.003.004.005.006.007.008.009.00

100 90 80 70 60 50 40 30

Percent Composite

Va

lue

/sq

.ft


Steel Weight per Sq. ft

Percentage Composite Comparison Unshored



Composite Comparison (Shored)

3.00 3.00 3.11 3.11 3.14 3.22 3.27 3.27

6.44 6.44 6.49 6.50 6.44 6.37 6.43 6.43

0.001.002.003.004.005.006.007.00

100 90 80 70 60 50 40 30

Pe rce nt Composite

va

lue

/sq

. ft



Percentage Composite Comparison Shored



Existing System Comparison

3.473.90

6.78

8.07

0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00

9.00

AES My Existing

Val

ue/

Sq

. ft


Steel W eight per Sq. ft

Existing Floor Comparison


Existing Core Comparisons

5.05 5.28

8.80

10.56

0.00

2.00

4.00

6.00

8.00

10.00

12.00

AES Existing My Existing

Val

ue/

Sq

. ft




Steel Systems Comparison


StructuralStructuralFoundation Re-designFoundation Re-design

Pile Cap Re-Design

alcoa business services center

Documents

floor w21x44

studyraised floor framingbeam

lbsimpact load

lbsuniform load

ftconcentrated load

ftultimate load

existing control

hornfeck engineering