PHASE 2 NEW BUILDING JOHN TYLER COMMUNITY COLLEGE MIDLOTHIAN CAMPUS Midlothian, VA Dennis Walter Jr. Construction Management AE Senior Thesis Final Presentation, Spring 2010 The Pennsylvania State University
Presentation Outline • Project Overview • Introduction of Analyses • Analysis I – Brick Façade • Analysis II – Roofing System • Analysis III – Transformer • Final Conclusions • Questions & Answers
Presentation Outline Client Information Project Location • Project Overview Virginia Community College Systems • Introduction of Analyses John Tyler Community College • Analysis I – Brick Façade Midlothian Campus • Analysis II – Roofing System • Built in 2000 • Single Academic Building • Analysis III – Transformer • Fast expansion � additional academic space • Final Conclusions • Campus-wide green initiative • Questions & Answers 800 Charter Colony Parkway, Midlothian, VA ~16 miles to Richmond, VA
Presentation Outline Project Overview Building Features: Construction Manager: • 8 Laboratory Classrooms Gilbane • 10,000 SF College Library • • Project Overview Architect: • Green Roof Burt Hill • • LEED Certified • Introduction of Analyses Size: • Analysis I – Brick Façade 3 Stories • 60,000 SF • Analysis II – Roofing System • Cost: • Analysis III – Transformer $18.5 million • • Final Conclusions Delivery Method: CM @ Risk; GMP Contract w/ contingency • • Questions & Answers Construction Schedule: May 2008 – July 2009; 14 Months; Classes begin August 24, 2009 •
Presentation Outline Introduction of Analysis Analysis I – Brick Façade • Hand-Laid Brick Exterior Façade vs. Precast Architectural Panels • Project Overview • Structural Calculations to check design of typical exterior bay • Introduction of Analyses • Analysis I – Brick Façade Analysis II – Roofing System • Green Roof and IRMA system vs. “Cool” Roof system • Analysis II – Roofing System • LEED and Heat Transfer comparison • Analysis III – Transformer • Final Conclusions Analysis III – Transformer • Research into building transformers • Questions & Answers • Electrical Calculations to size building transformer
Presentation Outline Analysis I – Brick Façade Structural Breadth • Project Overview Problem Statement: • Hand-Laid Masonry � time and space for construction • Introduction of Analyses • Problems with through wall flashing and drip edge details & • Analysis I – Brick Façade application of spray-on hot fluid applied vapor barrier. • Analysis II – Roofing System • Alternative systems may eliminate problems and ease construction • Analysis III – Transformer Goal: • Matching quality & performance • Final Conclusions • Cost-effective • Questions & Answers • Reduce site congestion and staging area
Presentation Outline SlenderWall Architectural Precast Concrete & Steel Stud Panel Wall System: • Project Overview • Exterior Surface – Thin Architectural Brick Veneer • Introduction of Analyses • Veneer cast into 2 inches of reinforced precast concrete • Inside Surface – 16 gauge, 6 inch steel studs @ 2 ft on center • Analysis I – Brick Façade • Connected with shear studs • Analysis II – Roofing System • Analysis III – Transformer SlenderWall Panel Replaces: • Brick Veneer • Final Conclusions • Spray-on Hot Fluid Applied Vapor Barrier • Questions & Answers • Exterior Sheathing • Exterior Metal Studs
Presentation Outline SlenderWall Panel Sizes: 122 Panels • Project Overview • Most economical at 10’ x 35’ for shipping • • Introduction of Analyses Not recommended over 13’ x 40’ • Connection to Structure: • Analysis I – Brick Façade Welded anchor or plate to exterior spandrel beams of floor above • • Analysis II – Roofing System Bolted connection as soon as panel is set by crane • • Analysis III – Transformer • Final Conclusions • Questions & Answers
Presentation Outline Structural Implications Check W 16x26 Beam for Moment: φ M n = 234 ft*kips > M u = 59.5 ft*kips √ OK • Project Overview Check W 16x26 Beam for Deflection: • Introduction of Analyses Construction Live Load: • Analysis I – Brick Façade Δ C-LL = 0.0827 inches < L/360 = (21*12)/360 = 0.7 inches √ OK • Analysis II – Roofing System Live Load: Δ LL = 0.0647 inches < 0.7 inches √ OK Total Load: Δ Total = 0.251 inches < 0.7 inches √ OK • Analysis III – Transformer Check W 10x45 Column for Axial Load: • Final Conclusions P u = 174.9 kips • Questions & Answers W 10x45 � φ c P n = 306 kips > P u = 174.9 kips √ OK
Presentation Outline Schedule Hand-Laid Brick – Building Enclosure Schedule: • 79 days (start to finish) • Project Overview • Constructed while elevated floor slabs being poured • Introduction of Analyses • Site congestion and large prepping area required • Analysis I – Brick Façade SlenderWall – Building Enclosure Schedule: • Analysis II – Roofing System • Fast erection time � 19 minutes per panel average • 48 days (start to finish) • Analysis III – Transformer • Allows construction to begin after superstructure is complete • Final Conclusions • Saves 16 total days in Building Enclosure Schedule • Questions & Answers • Reduces site congestion • Not on critical path � allows room for unforeseen delays or issues
Presentation Outline Cost Hand-Laid Brick Wall System: • $40.97/SF • Project Overview • Includes: • Introduction of Analyses • Utility brick • Analysis I – Brick Façade • Exterior sheathing • Fluid applied vapor barrier • Analysis II – Roofing System • Exterior studs • Analysis III – Transformer • Miscellaneous finishing • Final Conclusions • Precast sills SlenderWall Precast System: • Questions & Answers • $40.00/SF
Presentation Outline Quality Comparison Quality Comparison Hand-Laid Brick Wall System: SlenderWall Precast System: • Cavity wall system • Project Overview • Barrier wall system • Proven quality in construction and appearance • High Quality Architectural Class “A” Brick Veneer • Introduction of Analyses • Mortar joints wear over time � re-working required • Mock-up • Analysis I – Brick Façade • 100% water-tight and acts as vapor barrier • No leaking or wearing mortar joints • Analysis II – Roofing System • ¾” joint between panels: • Analysis III – Transformer • ¾” backer-rod • Final Conclusions • ½” caulking layer • Joints wear over time � re-working required • Questions & Answers
Presentation Outline Conclusions SlenderWall Precast System: • Project Overview • Building Enclosure Schedule reduction � 16 days • No Structural impact � reduction possible • Introduction of Analyses • Less staging & begins after superstructure • Analysis I – Brick Façade � Reduced site congestion • Analysis II – Roofing System • Cost savings � $15,883 • Analysis III – Transformer • Final Conclusions • Questions & Answers
Presentation Outline Analysis II – Roofing System M.A.E. Requirements • Project Overview Problem Statement: • Inverted Roof Membrane Assembly (IRMA) & Green Roof • Introduction of Analyses installed was expensive • Analysis I – Brick Façade • Alternative systems � may offer similar LEED requirements & upfront cost savings • Analysis II – Roofing System Goal: • Analysis III – Transformer • Similar quality & weatherproofing • Final Conclusions • Cost-effective • Questions & Answers • Meet LEED requirements and provide positive impact
Presentation Outline “Cool” Roof Single-Ply Thermoplastic Polyolefin (TPO) Membrane: • Project Overview • Exterior Surface � White reflective “cool” TPO membrane • Fully adhered to closed-cell poly. iso. insulation • Introduction of Analyses • Poly. Iso. Insulation � R-6/inch • Analysis I – Brick Façade • Fully adhered to composite concrete slab • Analysis II – Roofing System Replaces: • 11,300 SF � Ballasted IRMA Roofing • Analysis III – Transformer • 8,300 SF � Extensive Green Roof over IRMA • Final Conclusions • 19,600 SF � Hot Rubberized Asphalt Waterproofing • Questions & Answers membrane
Presentation Outline “Cool” Roof Design Firestone Building Products: • Project Overview • 60 Mil UltraPly TPO Membrane • UltraPly Adhesive • Introduction of Analyses • 5” Closed-cell Poly. Iso. Insulation (R-6/inch) • Analysis I – Brick Façade • Insulation Adhesive • Analysis II – Roofing System Design: • Analysis III – Transformer • R-30 � 5” of R-6/inch Insulation • Final Conclusions • 10-ft rolls overlapped and heat-welded at seams for continuous waterproof layer • Questions & Answers
Presentation Outline Thermal Properties Design Temperatures � Richmond, VA: • Project Overview • Summer: 75°F Indoor, 95°F Outdoor • Introduction of Analyses • Winter: 70°F Indoor, 14°F Outdoor • Analysis I – Brick Façade • Analysis II – Roofing System • Analysis III – Transformer • Final Conclusions TPO “Cool” Roof: • Questions & Answers • 37% Increase in Summer Heat Gain • 16% Increase in Winter Heat Losses
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