Plaza East Chantilly , Virginia Steven M. Miller Senior Thesis 2008 Construction Management
Plaza East Chantilly, Virginia Project Overview Presentation Topics Analysis 1: Building Envelope Analysis 2: Green Building Envelope Roof Investigation Implementation Green Roof Analysis 3: Im plem entation Checking Green Roof Loads New Roof Loads Analysis Research: Implementation of Research Topic: Steel Software for Steel Buildings Erection Software Q & A Steve Miller Construction Management
Plaza East Chantilly, Virginia Project Overview Goals Analysis 1: Building Envelope 1. Save tim e and m oney with new building façade m aterial Analysis 2: Green Roof 2. Use m oney saved to install a Implementation green roof 3. Save energy and m oney with Analysis 3: new building façade m aterial Checking Green Roof Loads and green roof 4. Inform others of the perks in the paperless process of steel Research: Implementation of buildings Software for Steel Buildings Q & A Steve Miller Construction Management
Plaza East Chantilly, Virginia Project Overview Proj ect Overview Analysis 1: Building Envelope Basic Project Inform ation: • 5 stories above grade Analysis 2: Green Roof • 123,000 sqf per building Implementation • Design ‐ Bid ‐ Build • Function ‐ General Office Building • Duration ‐ March 2006 to August 2007 Analysis 3: • Cost ‐ $28 to $29.5 million Checking Green Roof Loads • Total Project Cost $ 54 million Project Team : • Owner - Tishman Speyer Properties Research: • Architect - Hellmuth, Obata + Kassabaum, P.C. Implementation of Software for Steel • Mechanical Contractor - GHT Limited Buildings • Structural Contractor - Smislova, Kehnemui & Associates, P.C. • General Contractor: James G. DAVIS Construction Q & A • Civil Engineer - VIKA, Inc. Steve Miller Construction Management
Plaza East Chantilly, Virginia Project Overview Proj ect Overview Analysis 1: Building Envelope Analysis 2: Green Roof Implementation Analysis 3: Checking Green Roof Loads Research: Implementation of Software for Steel Buildings Q & A Steve Miller Construction Management
Plaza East Chantilly, Virginia Project Overview Building Envelope Analysis 1: Building Envelope CENTRIA Form awall Dim ension Series with Duracast Coating Analysis 2: Green And CENTRIA Versawall with Duracst Coating Roof vs Implementation Architectural Precast Concrete Analysis 3: Checking Green Roof Loads Research: Implementation of Software for Steel Buildings Q & A Steve Miller Construction Management
Plaza East Chantilly, Virginia Project Overview Building Envelope Analysis 1: Building Envelope CENTRIA Form awall and Versawall Architectural Precast Analysis 2: Green Roof Pros Pros Implementation Reduces structural requirements Highly Durable Reduces installation costs Good Acoustics Shortens material lead time Molds can be easily replicated Analysis 3: Faster Installation Usually Cheap Checking Green Higher R-Value Roof Loads LEED Points Cons Degradation from acid rain and alkali runoff etches glass and Research: Cons Implementation of deteriorates metals Plain looking compared to the Software for Steel Surface Finishes inconsistent architectural precast Buildings Accidents usually fatal Q & A Steve Miller Construction Management
Plaza East Chantilly, Virginia Project Overview Building Envelope Analysis 1: Building Envelope LEED Points Analysis 2: Green Roof • Up to 10 for optim izing energy perform ance Implementation • 2 for recycling content • 2 for low-em itting m aterials Analysis 3: Checking Green ▫ Adhesives and Sealants Roof Loads ▫ Paints and Coatings Research: Implementation of Software for Steel Buildings Q & A Steve Miller Construction Management
Plaza East Chantilly, Virginia Project Overview Building Envelope Analysis 1: Building Envelope Area and cost Calculations Analysis 2: Green Roof Estimated Façade Costs Implementation Quantity Unit Total Unit Cost Total Cost 23,663 Precast (original) sf ‐‐ $2,600,000.00 23,663 Versawall sf 30 $709,890.00 23,663 Formawall Dim. Series sf 60 $1,419,780.00 Analysis 3: Checking Green Roof Loads Savings: 4” Versawall with Duracast Finishing Actual precast cost (not including change orders): $2,600,000.00 ‐ $709,890.00 = $1,8 9 0 ,110 .0 0 Research: Implementation of Formawall Dimension Series with Duracast Finishing Software for Steel Actual precast cost (not including change orders): Buildings $2,600,000.00 ‐ $1,419,780.00 = $ 1,18 0 ,220 .0 0 Q & A Steve Miller Construction Management
Plaza East Chantilly, Virginia Project Overview Building Envelope Analysis 1: Building Envelope Analysis 2: Green Roof Implementation Analysis 3: Checking Green Roof Loads Research: Implementation of Software for Steel Buildings Q & A Steve Miller Construction Management
Plaza East Chantilly, Virginia Project Overview Building Envelope Analysis 1: Building Envelope Top Floor Only Analysis 2: Green Existing Form awall and Versawall Roof R-Value of 10 for Walls R-Value of 20 and 30 for Walls Implementation R-Value of 18 to 19 for Roof R-Value of 18 to 19 for Roof Analysis 3: Checking Green Roof Loads Research: Implementation of Software for Steel Buildings Q & A Steve Miller Construction Management
Plaza East Chantilly, Virginia Project Overview Building Envelope Analysis 1: Building Envelope Energy Savings Analysis 2: Green Roof Form awall 1.90 kBtu/ft 2 Heating Implementation ‐ 0.1 kBtu/ft 2 Cooling 1.8 kBtu/ft 2 Total Analysis 3: Checking Green Annual Energy Costs Savings were $0.021/ft 2 Roof Loads Versawall 1.6 kBtu/ft 2 Heating Research: ‐ 0.3 kBtu/ft 2 Cooling Implementation of Software for Steel ‐ 0.1 kBtu/ft 2 Other Buildings 1.2 kBtu/ft 2 Total Annual Energy Costs savings were $0.012/ft 2 Q & A Steve Miller Construction Management
Plaza East Chantilly, Virginia Project Overview Green R oof Implementation Analysis 1: Building Envelope Proposal: Use m oney saved from different façade to add a Green Roof to help with Energy Savings Analysis 2: Green Roof Implementation Som e Green Advantages Helps manage storm water – almost 1000 parking spots • Reduce noise pollution • Analysis 3: Long life span from ultraviolent protection • Checking Green Creates habitat for birds and other animals • Roof Loads Helps with the urban heat island effect • Research: Implementation of Software for Steel Buildings Q & A Steve Miller Construction Management
Plaza East Chantilly, Virginia Project Overview Green R oof Implementation Analysis 1: Building Envelope Top Floor Only Analysis 2: Green Existing Green Roof Roof R-Value of 10 for Walls R-Value of 10 for Walls Implementation R-Value of 18 to 19 for Roof R-Value of 30 for Roof Solar Absorption 0 .6 Solar Absorption 0 .2 Analysis 3: Checking Green Roof Loads Research: Implementation of Software for Steel Buildings Q & A Steve Miller Construction Management
Plaza East Chantilly, Virginia Project Overview Green R oof Implementation Analysis 1: Building Envelope Energy Savings Analysis 2: Green Green Roof 4.5 kBtu/ft 2 Heating Roof Implementation 0.1 kBtu/ft 2 Cooling 0.2 kBtu/ft 2 Other 4.8 kBtu/ft 2 Total Analysis 3: Checking Green Annual Energy Costs Savings were $0.003/ft 2 Roof Loads Cost of Existing Roof Cost of Green Roof $9 per ft 2 at 20 years life span $8 to $12 per ft 2 additional to existing price at 40 to 50 years life span Research: Implementation of $17/ft 2 x 26000 = $442,000 Software for Steel Buildings $ 208,000 additional original cost Q & A Steve Miller Construction Management
Plaza East Chantilly, Virginia Project Overview Green R oof Implementation Analysis 1: Building Envelope Years needed to m ake m oney back? Analysis 2: Green $442,000 ‐ $234,000 = $208,000 Roof Implementation Annual Energy Cost Savings does not apply Analysis 3: After 20 years build up roof needs replaced: Checking Green Roof Loads ($9/ft 2 )(26,000ft 2 )(2 nd roof) = $468,000 > $442,000 Research: Implementation of Software for Steel Green roof pays for itself after 20 years… Buildings …and lasts up to the next 20 to 30 years Q & A Steve Miller Construction Management
Plaza East Chantilly, Virginia Project Overview Green R oof Implementation Analysis 1: Building Envelope Individually - Building façade Not much energy or cost savings Analysis 2: Green Roof Implementation -Green Roof Not much energy or cost savings Decided to com bine green roof and new building envelope Analysis 3: Checking Green Versawall and Green Roof Form awall and Green Roof Roof Loads Research: Implementation of Software for Steel Buildings Q & A Steve Miller Construction Management
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