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THE GEORGE WASHINGTON UNIVERSITY. THE E LLIOTT S CHOOL. OF INTERNATIONAL AFFAIRS. PRESENTATION OUTLINE Introduction Project Overview Site Planning Analysis Curtain Wall Redesign Mechanical Acoustical Construction Research Conclusions. PRESENTATION OUTLINE Introduction

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slide1

THE GEORGE WASHINGTON UNIVERSITY

THE ELLIOTT SCHOOL

OF INTERNATIONAL AFFAIRS

slide2

PRESENTATION OUTLINE

  • Introduction
  • Project Overview
  • Site Planning Analysis
  • Curtain Wall Redesign
    • Mechanical
    • Acoustical
    • Construction
  • Research
  • Conclusions
slide3

PRESENTATION OUTLINE

  • Introduction
  • Project Overview
  • Site Planning Analysis
  • Curtain Wall Redesign
    • Mechanical
    • Acoustical
    • Construction
  • Research
  • Conclusions
slide5

THE GEORGE WASHINGTON UNIVERSITY

THE 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
slide6

PROJECT TEAM

  • OWNER
  • ARCHITECT/HVAC ENGINEER
  • CIVIL ENGINEER
  • STRUCTURAL ENGINEER
  • ACOUSTICAL CONSULTANT
  • CONSTRUCTION MANAGER
slide7

PROJECT OVERVIEW

  • PROJECT 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
slide8

PRESENTATION OUTLINE

  • Introduction
  • Project Overview
  • Site Planning Analysis
  • Curtain Wall Redesign
    • Mechanical
    • Acoustical
    • Construction
  • Research
  • Conclusions
slide9

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
slide12

SITE PLANNING ANALYSIS

  • COST COMPARISON
  • Existing Temporary Offices – RS Means
  • Proposed Trailers – GE Capital Modular

$ 44, 009

slide13

SITE PLANNING CONCLUSIONS

  • EFFICIENCY 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
slide14

PRESENTATION OUTLINE

  • Introduction
  • Project Overview
  • Site Planning Analysis
  • Curtain Wall Redesign
    • Mechanical
    • Acoustical
    • Construction
  • Research
  • Conclusions
slide15

CURTAIN WALL OVERVIEW

  • PURPOSE
  • 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
slide16

EXISTING CURTAIN WALL

  • SYSTEM
  • 9, 500 SF Standard DGU Curtain Wall System
  • INSTALLATION
  • Stick-Built
  • COST
  • $1.0 Million
  • SCHEDULE
  • 24 Weeks to Install
slide17

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
slide18

PROPOSED CURTAIN WALL

MECHANICAL COMPONENTS AND SYSTEM OPERATION

slide19

CURTAIN WALL PERFORMANCE

  • THERMAL 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
slide20

CURTAIN WALL PERFORMANCE

  • MECHANICAL 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
slide21

CURTAIN WALL PERFORMANCE

  • ORIGINAL 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
slide22

CURTAIN WALL CONSTRUCTION

  • PROJECT 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
slide23

CURTAIN WALL CONSTRUCTION

PROJECT DELIVERY

EXISTING

6 MONTHS

8 MONTHS

PROPOSED

slide24

CURTAIN WALL CONSTRUCTION

  • CONSTRUCTION SCHEDULE
  • Unit System Reduces Required Installation Time

EXISTING

PROPOSED

4 WEEKS

slide25

CURTAIN WALL CONSTRUCTION

  • SYSTEM COST ANALYSIS
  • Added Initial Cost
  • Offset Slightly by Mechanical System Reductions
  • Performance and Efficiency  Long-Term Payback

$ 283, 364

slide26

CURTAIN WALL CONCLUSIONS

  • MECHANICAL 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
slide27

PRESENTATION OUTLINE

  • Introduction
  • Project Overview
  • Site Planning Analysis
  • Curtain Wall Redesign
    • Mechanical
    • Acoustical
    • Construction
  • Research
  • Conclusions
slide28

RESEARCH OVERVIEW

  • PURPOSE
  • 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
slide29

RESEARCH METHODOLOGY

CASE STUDIES

  • Levine Hall – The University of Pennsylvania
  • Justice Center – Seattle, Washington
  • Manulife Building – Boston, Massachusetts
slide30

RESEARCH RESULTS

  • APPLICABLE 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
slide31

PRESENTATION OUTLINE

  • Introduction
  • Project Overview
  • Site Planning Analysis
  • Curtain Wall Redesign
    • Mechanical
    • Acoustical
    • Construction
  • Research
  • Conclusions
slide32

CONCLUSIONS

  • SITE PLANNING
  • More Convenient
  • Allows Better Coordination Between CM and Trades
  • Improves the Safety Monitoring Capabilities
  • $44,000 in General Conditions Savings
slide33

CONCLUSIONS

  • CURTAIN 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
slide34

CONCLUSIONS

  • RESEARCH
  • 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
slide35

ACKNOWLEDGEMENTS

THE PENNSYLVANIA STATE UNIVERSITY DEPARTMENT OF ARCHITECTURAL ENGINEERING

Jonathan Dougherty

Moses Ling

Dr. John Messner

Dr. David Riley

Dr. Michael Horman

THE GEORGE WASHINGTON UNIVERSITY

Dave Wellman

Art Bean

THE RIDGEVIEW GLASS COMPANY

Dave Allerdings

PERMASTEELISA CLADDING TECHNOLOGIES, LTD.

THE GILBANE BUILDING COMPANY

Ben Alexander

Corey Sarver

Derek Meyer

Larry Hardesty

Wayne Bishop

Bill Cross

Bill DeStefano

Andy Faber

Dwight MacGee

MY FAMILY

THE REST OF THE 2003 AE THESIS CLASS

Kate Jennings

Joe DiIenno

Chris Champagne

All the CM’s

242 South Atherton

slide37

MECHANICAL SYSTEM REDUCTIONS

  • Fin 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
slide38

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
slide44

CURTAIN WALL – HEATING LOAD

PRECAST WALL – U-VALUE

EXISTING ENVELOPE LOAD – HEATING

PROPOSED ENVELOPE LOAD - HEATING