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Introduction: The People

Introduction: The People. Owner: Tomo Cerovsek: Slovenia Contract: A rchitectural Design: Mario Sargac E ngineering Design: Michael Jewsbury C onstruction Manager: Roger Lee A pprentice: Kit Fleming Location: Hope River, Lake Tahoe Detailed Design Phase. Four Alternatives.

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Introduction: The People

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  1. Introduction: The People • Owner: Tomo Cerovsek: Slovenia • Contract:ArchitecturalDesign:Mario Sargac EngineeringDesign:Michael Jewsbury ConstructionManager:Roger Lee Apprentice: Kit Fleming • Location: Hope River, Lake Tahoe • Detailed Design Phase

  2. Four Alternatives

  3. Alternative 1 2nd floor plan 3rd floor plan 1st floor plan

  4. Alternative 2 A A E C

  5. Alternative 3 RC June 10, 2012 Precast May 22, 2012 Sept. 25, 2012 • Cantilevers • Too Much Steel • Roofing System • Doesn’t Meet Square Footage Requirement Sept. 12, 2012 May 15, 2012 Steel Sept. 5, 2012

  6. Alternative 4

  7. Pros/cons • Cost • Constructability • Challenge • Satisfaction of Owner Requirements • Life-Cycle Costs • Owner’s second choice • Need for New Technology

  8. Architect Fakulteta za Gradbenistvo in Geodezijo

  9. Final solution

  10. Final solution

  11. Architecture • #1 Floor plan

  12. Architecture • #1 Floor cutaway

  13. Architecture • #2 Floor plan

  14. Architecture • #2 floor cutaway

  15. Architecture • #3 Floor plan

  16. Architecture • #3 floor cutaway

  17. Sun Study

  18. Room layout requirements • Typical room sizes on #1, #2 and #3 floor: required vs. designed {sq ft}

  19. Engineer

  20. Requirements Structural Seismic Design Gravity Design • Geometry Alignment • System Design • Component Design • PB-Design Big Picture

  21. Interations Gravity A E A C • Structure vs. Architecture • Integration • Gravity Design • FL = 0.244 ksf • W18X35 C=1” (40) • W18x46 C=1” (45) • W14X30 C=1/8” (22) • C9X15

  22. Structural Gravity • Structure vs. Architecture • Integration • Gravity Design • FL = 0.244 ksf • W18X35 C=1” (40) • W18x46 C=1” (45) • W14X30 C=1/8” (22) • C9X15

  23. Structural Gravity • Structure vs. Architecture • Integration • Gravity Design • RL = 0.588 ksf • W21X147 C=3/8”(36) • W21x101 C=1” (52) • W18X40 C=1/8” (45) • W21X160 C = 1” (40)

  24. Iterations Foundation A E A C • Foundation Design • Bearing=4-5ksf • Glacial Till/Bedrock • Ring Beam • Grade Beam • Spread Footing

  25. Structural Gravity System Max 300k Factored

  26. Auditorium

  27. Seismic Design T1 = .31 sec T2 = .29 sec Vx = 925 k Vy = 1001 k • PGA = .4g • Elastic = .18g • Inelastic = .7g • UBC1997 Elastic/Inelastic • Spectral Analysis (SAP2000) • Loma Prieta Ground Motions for Bedrock Sites • Nonlinear Analysis/ P-delta • FE Shear Walls 10% Prob. In 50 years 2% Prob. In 50 years MCE = 7.2

  28. Seismic Design Drift = .42% Shear Wall Stress = 1ksi Inelastic Stress = 4 ksi • Shear Wall Design • Performance Based Design • Ductile Failure in worst case EQ-IV SP2 Performance (some repair) NP2 Performance (some Damage) Enhanced Performance Objective 2 (SEAOC)

  29. Shear Stud Reinforcement Steel Deck Concrete Diaphragm Shear Wall And Misc. MEP ROOF

  30. Foundation Site Profile Bedrock Settlement Foundation Slab on grade Spread Footing

  31. Construction Manager

  32. Construction Requirements & Challenges • Schedule Limitations • May 2012 - Early room occupancy for computer lab • September 30, 2012 - Project completes for dedication • Schedule Risks • Winter weather during months of January and February may affect concrete pour • Lead time for Structural steel and MEP equipment

  33. Construction Requirements & Challenges • Budget Limitations • Total Budget - $4,200,000 • Structural Budget - $370,000 • Budget Risks • Inflation Rate - Assumed 2.5% • Production Rate - Skill labor force is limited in Lake Tahoe area • Winter Weather - May need to heat concrete forms

  34. Excavation October 3, 2011 • Excavate from South to North • 2 Weeks • 180 CY/Day • $41,000

  35. Footing and Foundation October 10, 2011 • Starting from South Side • 5 weeks • $24,600

  36. Steel Frame November 14, 2011 • Start from east and back out • Steel structure • Metal decking • 2 weeks to erect • 3 weeks to PBW

  37. Shear Walls November 30, 2011 • Total Structural System $422,000

  38. Milestone #1 January 3, 2012 • Steel Structure complete • Shear walls poured • Start pouring slabs from top down to accommodate early occupancy

  39. MEP Systems Light 12’ 10’ 9’ January 30, 2012 • Beam Height Consideration

  40. Interior February 6, 2012 • Glass walls vs. Stud walls • $50/SF for glass • $3/SF for stud • $5/SF aerogel

  41. Slab on Grade February 6, 2012 • Concurrent activity with 3rd floor interior & MEP systems • Place vapor barrier & sand with bob cat • Also finish strip footing on west side

  42. Exterior Cladding February 27, 2012 • GFRC Panels $384,000 • Concurrent with interior work at 3rd and 2nd flrs

  43. Milestone #2 - Early Occupancy May 14, 2012 • 2nd floor interior partially complete

  44. Project Completion September 10, 2012 • Ahead of schedule

  45. SWOT Analysis for Construction • Strengths • Meets owner’s schedule requirements • Cost effective at $112/SF • Weaknesses • Heavy roof beam • Construction sequence forced by staggered trusses system • 4.4 Million • High cost for interior glass wall

  46. SWOT Analysis for Construction • Opportunities • Cost savings by reducing amount of glass walls • Cost savings with Aerogel • Threats • Winter weather • Lack of skill labor pool • Installation of glass walls

  47. Materials • Aerogel • What is Aerogel? • Strengths: strength/weight, insulation • Weaknesses: cost, transparency • Opportunities: insulation, windows • Threats: cost

  48. Materials • Supercritical Ceramics • What are supercritical ceramics? • Strengths: perfect formation, strength/weight • Weaknesses: scale, fabrication • Opportunities: environment • Threats: patents

  49. The Process A Iteration Collaboration Communication International C E

  50. Team Matrix A E C Alternate 1 Alternate 2 Alternate 3 Alternate 4

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