introduction project background site planning curtain wall research conclusions thesis keith j....

INTRODUCTION

PROJECT

BACKGROUND

SITE PLANNING

CURTAIN WALL

RESEARCH

CONCLUSIONS

THESIS Keith J. Mondock Construction Management

THE GEORGE WASHINGTON UNIVERSITYTHE ELLIOTT SCHOOL

OF INTERNATIONAL AFFAIRS

INTRODUCTION

PROJECT

OVERVIEW

SITE PLANNING

CURTAIN WALL

RESEARCH

CONCLUSIONS


PRESENTATION OUTLINE• Introduction

• Project Overview

• Site Planning Analysis

• Curtain Wall Redesign

• Mechanical

• Acoustical

• Construction

• Research

• Conclusions

INTRODUCTION

PROJECT

OVERVIEW

SITE PLANNING

CURTAIN WALL

RESEARCH

CONCLUSIONS


PROJECT OVERVIEWLOCATION

INTRODUCTION

PROJECT

OVERVIEW

SITE PLANNING

CURTAIN WALL

RESEARCH

CONCLUSIONS


THE GEORGE WASHINGTON UNIVERSITYTHE ELLIOTT SCHOOL

OF INTERNATIONAL AFFAIRS

ACADEMIC COMPONENT• 8 Floors

• Classroom, Auditorium, and Office Spaces

RESIDENTIAL COMPONENT• One, Two, and Three Bedroom Suites

• 11 Floors

PARKING GARAGE• 3 Underground Levels

• Approximately 200 Vehicles

INTRODUCTION

PROJECT

OVERVIEW

SITE PLANNING

CURTAIN WALL

RESEARCH

CONCLUSIONS

THESIS Keith J. Mondock Construction Management PROJECT TEAM

SmithGroup

Wiles Mensch Corp.

• OWNER

• ARCHITECT/HVAC ENGINEER

• CIVIL ENGINEER

• STRUCTURAL ENGINEER

• ACOUSTICAL CONSULTANT

• CONSTRUCTION MANAGER

INTRODUCTION

PROJECT

OVERVIEW

SITE PLANNING

CURTAIN WALL

RESEARCH

CONCLUSIONS


PROJECT OVERVIEWPROJECT SIZE

• 330,000 SF

PROJECT COST

• $48 Million

PROJECT SCHEDULE

• Total Construction Schedule: 30 months

• Ground Breaking: October 2000

• Residential Completion: August 2002

• Academic Completion: April 2003

INTRODUCTION

PROJECT

OVERVIEW

SITE PLANNING

CURTAIN WALL

RESEARCH

CONCLUSIONS






• Mechanical

• Acoustical

• Construction

• Research

• Conclusions

INTRODUCTION

PROJECT

OVERVIEW

SITE PLANNING

CURTAIN WALL

RESEARCH

CONCLUSIONS


SITE PLANNING ANALYSIS

PURPOSE

• Improve the Convenience, Coordination, and Safety of the Construction Project

STRATEGY

• Replace the Construction Manager’s Temporary Site Office with Two Mobile Trailers and Relocate These Within the Structure

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INTRODUCTION

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COST COMPARISON

• Existing Temporary Offices – RS Means

• Proposed Trailers – GE Capital Modular

TemporaryStructure -

Parking Level

Mobile OfficeTrailers -

Ground Level

$0.00

$10,000.00

$20,000.00

$30,000.00

$40,000.00

$50,000.00

$60,000.00

$70,000.00

$ 44, 009

INTRODUCTION

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RESEARCH

CONCLUSIONS


SITE PLANNING CONCLUSIONSEFFICIENCY AND COORDINATION

• Allows for Nextel Service in the CM Office

CONVENIENCE

• Proximity to Site Entrance

SAFETY

• Amongst More Construction Activities

• Ability to Monitor Site Entrance and Material Lift

COST

• $44,000 in Savings to the General Conditions

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PROJECT

OVERVIEW

SITE PLANNING

CURTAIN WALL

RESEARCH

CONCLUSIONS






• Mechanical

• Acoustical

• Construction

• Research

• Conclusions

INTRODUCTION

PROJECT

OVERVIEW

SITE PLANNING

CURTAIN WALL

RESEARCH

CONCLUSIONS


CURTAIN WALL OVERVIEWPURPOSE

• Reduce the Installation Schedule

• Minimize the Risk Associated with Stick-Systems

• Improve Building Environment

• Maximize Energy Efficiency

• Maintain the Intent of the Original Design

STRATEGY

• Dual-Layered Curtain Wall System Apply a Unitized

INTRODUCTION

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OVERVIEW

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CURTAIN WALL

RESEARCH

CONCLUSIONS


EXISTING CURTAIN WALL SYSTEM

• 9, 500 SF Standard DGU Curtain Wall System

INSTALLATION

• Stick-Built

COST

• $1.0 Million

SCHEDULE

• 24 Weeks to Install

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PROPOSED CURTAIN WALL SYSTEM

• Double-Skin Active WallTM Manufactured by Permasteelisa Cladding Technologies, Ltd.

INSTALLATION

• Prefabricated Unit System

COST

• Approximately $1.4 Million

SCHEDULE

• 20 Weeks to Install

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CONCLUSIONS


PROPOSED CURTAIN WALL MECHANICAL COMPONENTS AND SYSTEM OPERATION

INTRODUCTION

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CURTAIN WALL PERFORMANCETHERMAL INSULATING PROPERTIES

• U-Value Dramatically Reduced

• Return Air Cavity and U-Value Allow Interior Surface to be Maintained Within 2˚F of the Room Air

ACOUSTICAL INSULATING PROPERTIES

• STC Rating is Greatly Improved

• Sits Along Four Lanes of Traffic Congested E Street

PERFORMANCE CRITERIA EXISTING DGU WALL PROPOSED ACTIVE WALLTM

U-Value (BTU/HrFt2?F) 0.625 0.100

STC Rating 32 40

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CURTAIN WALL

RESEARCH

CONCLUSIONS


CURTAIN WALL PERFORMANCEMECHANICAL SYSTEM REDUCTIONS

• Thermal Insulation Allows for Nearly 100 Existing Fin Tube Radiators to be Eliminated

724.5 MBH Reduction

• Elimination of Fin Tube Radiators Allows for Reduction in Gas Fired Boiler

2000 MBH 1200 MBH

• Mechanical Blinds Replace Existing Shades

MECHANICAL COST REDUCTIONS

• Decrease Associated Mechanical Cost by $100,000

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CURTAIN WALL PERFORMANCEORIGINAL DESIGN INTENT

• Components are Custom Manufactured – Materials and Sizes – in Conjunction With Architectural Design

- Architectural Aesthetics Upheld

- Daylighting Levels Unchanged

• Air Cavity Added Within the Existing Framing System in Area Occupied by Existing Radiators

- Square Footages Maintained

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CURTAIN WALL CONSTRUCTIONPROJECT DELIVERY

• Complex System Requires Complete Integration of Building Systems as well as the Project Team

Earlier Involvement of the Construction Manager

Subsequent Involvement of Façade Engineer/Supplier, Through Detailed

Performance Specification

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CURTAIN WALL CONSTRUCTIONPROJECT DELIVERY

6 MONTH

S

EXISTING

PROPOSED

8 MONTH

S

INTRODUCTION

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CURTAIN WALL CONSTRUCTIONCONSTRUCTION SCHEDULE

• Unit System Reduces Required Installation Time

EXISTING

PROPOSED4

WEEKS

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CURTAIN WALL CONSTRUCTIONSYSTEM COST ANALYSIS

• Added Initial Cost

• Offset Slightly by Mechanical System Reductions

• Performance and Efficiency Long-Term Payback

Existing DGU Wall &Fin Tube Radiation

Proposed Dual-Layered Wall

$0

$200,000

$400,000

$600,000

$800,000

$1,000,000

$1,200,000

$1,400,000

$ 283, 364

INTRODUCTION

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OVERVIEW

SITE PLANNING

CURTAIN WALL

RESEARCH

CONCLUSIONS

THESIS Keith J. Mondock Construction Management CURTAIN WALL CONCLUSIONSMECHANICAL AND ACOUSTICS

• Improved Environment at Building Perimeter

• Mechanical System Reductions

PROJECT DELIVERY

• Increased Involvement and Integration

CONSTRUCTION SCHEDULE

• Installation Reduced by 4 Weeks

SYSTEM COST ANALYSIS

• Added Premium

• Long-Term Payback Period Appropriate

INTRODUCTION

PROJECT

OVERVIEW

SITE PLANNING

CURTAIN WALL

RESEARCH

CONCLUSIONS






• Mechanical

• Acoustical

• Construction

• Research

• Conclusions

INTRODUCTION

PROJECT

OVERVIEW

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CONCLUSIONS


RESEARCH OVERVIEWPURPOSE

• Investigate the Emerging Technology of Dual-Layered Glass Facades

- Applicable Projects

- Delivery Method

- Installation

- Cost and Value

STRATEGY

• Case Studies

• Internet, Journal, and Periodical References

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CONCLUSIONS


RESEARCH METHODOLOGYCASE STUDIES

• Levine Hall – The University of Pennsylvania• Justice Center – Seattle, Washington• Manulife Building – Boston, Massachusetts

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RESEARCH

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RESEARCH RESULTSAPPLICABLE PROJECTS

• Designs Requiring All-Glass Facades

• Sustainable Design and Construction – LEED

DELIVERY METHOD

• Design-Build Complete Project Integration

INSTALLATION

• Prefabricated Unit Components

COST AND VALUE

• Added Initial Cost

• Long-Term Pay-Back Period

INTRODUCTION

PROJECT

OVERVIEW

SITE PLANNING

CURTAIN WALL

RESEARCH

CONCLUSIONS






• Mechanical

• Acoustical

• Construction

• Research

• Conclusions

INTRODUCTION

PROJECT

OVERVIEW

SITE PLANNING

CURTAIN WALL

RESEARCH

CONCLUSIONS


CONCLUSIONSSITE PLANNING

• More Convenient

• Allows Better Coordination Between CM and Trades

• Improves the Safety Monitoring Capabilities

• $44,000 in General Conditions Savings

INTRODUCTION

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OVERVIEW

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CURTAIN WALL

RESEARCH

CONCLUSIONS


CONCLUSIONSCURTAIN WALL REDESIGN

• Improved Environment – Thermally and Acoustically

• Maintains Original Architectural Design Intent

• Requires Increased Project Integration

• Reduces Installation Schedule by 4 Weeks

• Added Initial Cost Recouped Through Energy Savings

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CONCLUSIONSRESEARCH

• Viable Option for Improved Envelope Performance

- Design/Build Projects

- Initial Cost Not the Primary Concern

• Unit Installation Decreased Installation Time

• More Appropriate As Energy Costs Increase and Familiarity is Gained with Design and Construction

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CONCLUSIONS


ACKNOWLEDGEMENTSTHE PENNSYLVANIA STATE UNIVERSITY DEPARTMENT

OF ARCHITECTURAL ENGINEERING

Jonathan DoughertyMoses Ling

Dr. John MessnerDr. David Riley

Dr. Michael Horman

THE GEORGE WASHINGTON UNIVERSITYDave Wellman

Art Bean

THE RIDGEVIEW GLASS COMPANY

Dave Allerdings

PERMASTEELISA CLADDING TECHNOLOGIES, LTD.

THE GILBANE BUILDING COMPANY

Ben AlexanderCorey SarverDerek Meyer

Larry HardestyWayne Bishop

Bill CrossBill DeStefano

Andy FaberDwight MacGee

MY FAMILY

THE REST OF THE 2003 AE THESIS CLASS

Kate JenningsJoe DiIenno

Chris ChampagneAll the CM’s

242 South Atherton

INTRODUCTION

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RESEARCH

CONCLUSIONS


QUESTIONS ?

INTRODUCTION

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CONCLUSIONS


MECHANICAL SYSTEM REDUCTIONSFin Tube Radiator Specifications

• 2070 BTU/Hr/Ft• 7.48 GPM• 3.5’ Length

Gas Fired Boiler Specifications• 2000 MBH Input• 86% Combustion Efficiency

2070 BTU/Hr/Ft x 3.5’ = 7245 BTU/Hr = 7.245 MBH/Radiator

7.245 MBH/Radiator x 98 Radiators = 724.5 MBH Reduction

2000 MBH x 86% = 1720 MBH Maximum Output

1720 MBH – 724.5 MBH = 995.5 MBH

995.5 MBH / 86% = 1157.6 MBH 1200 MBH Boiler

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MECHANICAL SYSTEM SAVINGS

1999 RS Means Building Construction Cost Data

• 1960 MBH Gas Fired Boiler: $26,700

• 1200 MBH Gas Fired Boiler: $18,100

• Washington, DC City Cost Index (Mechanical): 95.9

• 2000 Historical Cost Index: 119.6

• 1999 Historical Cost Index: 117.6

$26,700 - $18,100 = $8600

$8600 x .959 x 119.6/117.6 = $8387.66 Total Adjusted Savings

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CONCLUSIONS


ITEM QTYUNIT

TOTAL W/ O&P

COST INCL O&P

Fin Tube, 2-3/4" copper tube, 4-1/4" alum. fin 343 lf 82.08 $28,153.44

Copper Piping, 3/4" 900 lf 7.2 $6,480.00

Steel Shade Supports 785 lf 42 $32,970.00

Mechanically Operated Sun Shades 3780 sf 5.25 $19,845.00

Boiler Reduction - - - $8,387.66

TOTAL

$95,836.10

MECHANICAL SYSTEM SAVINGS

INTRODUCTION

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SITE PLANNING

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RESEARCH

CONCLUSIONS


PR

OPO

SED

EX

ISTIN

G

INTRODUCTION

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INTRODUCTION

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ITEM QTY UNITTOTAL

INCL O&PCOST INCL O&P

Prehung 3'x7' Exterior Steel Door 3 ea 305.00 915.00Prehung Interior Lauan Passage Door 4 ea 161.80 647.20Commercial Grade 40 oz Carpet 150 sy 34.50 5175.0018 ga x 3-5/8" Metal Studs (16" OC) 2200 lf 15.60 34320.001/2" Thick Drywall (Taped and Finished) 5418 sf 1.06 5743.08Packaged AC (12,000 BTU cooling) 3 ea 1250.00 3750.002'x4' Surface Mounted 40W Lighting Fixture 19 ea 174.00 3306.00Temporary Circuit Breaker (400 Amp) 1 ea 2325.00 2325.002-Way Wall Switch (Type MC Cable) 8 ea 100.00 800.00Duplex Receptacle (Type MC Cable) 29 ea 49.00 1421.00Electrical Wiring (MC Cable) 3 clf 216.00 648.00Floor Mounted Water Closet 1 ea 276.00 276.00Wall Mounted Service Sink 1 ea 670.00 670.00Sewage Ejector 1 ea 1325.00 1325.00Plumbing Piping & Fittings 150 lf 8.70 1305.00PVC Piping & Fittings 75 lf 17.80 1335.00Miscellaneous 2"x4" Lumber 0.2 mbf 592.00 118.40Miscellaneous Plywood 10 sheet 8.75 87.50

$64,167.180.957

$61,407.99

SUM

TOTALLOCATION FACTOR


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CONCLUSIONS


ITEM QTY UNITUNIT COST

TOTAL COST

10'x32' Mobile Office Trailer 9 mo 417.50 3757.5010'x44' Mobile Office Trailer 17.5 mo 437.50 7656.25Site Delivery 2 ea 450.00 900.00Block and Level 1 ea 1995.00 1995.00Tie Down 12 ea 45.00 540.00Return Delivery 2 ea 450.00 900.00Dismantling 1 ea 1650.00 1650.00

TOTAL $17,398.75


INTRODUCTION

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OVERVIEW

SITE PLANNING

CURTAIN WALL

RESEARCH

CONCLUSIONS

THESIS Keith J. Mondock Construction Management CURTAIN WALL – HEATING LOADPRECAST WALL – U-VALUE

EXISTING ENVELOPE LOAD – HEATING

PROPOSED ENVELOPE LOAD - HEATING

COMPONENT R-VALUE Inside Surface 0.69 0.625" Gypsum Board 0.56 2.5" Metal Studs 0.91 2.5" Rigid Insulation 8.01 0.5" Air Space 0.91 6" Precast Panel 2.02 Outside Surface 0.33 Total 13.43

EXISTING CURTAIN WALL U-VALUE WALL AREA (FT2) ΔT Q (BTU/HR) Precast Panel Wall System 0.07 21 55 80.85 DGU Curtain Wall 0.625 84 55 2887.5

Total 2968.35

PROPOSED CURTAIN WALL U-VALUE WALL AREA (FT2) ΔT Q (BTU/HR) Precast Panel Wall System 0.07 21 55 80.85 Dual-Layered Curtain Wall 0.10 84 55 462 Total 542.85

introduction project background site planning curtain wall research conclusions thesis keith j....

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