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River 2001

RAHINAH IBRAHIM Stanford University Architect. JORGE FUENTES Stanford University Construction Manager. CRAIG LONG Kansas University Engineer. ROXANNE ZOLIN Stanford University Owner. River 2001. SACRAMENTO, CALIFORNIA, USA. Seismic Zones Map. Wind Speed Zones Map. Precipitation:

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River 2001

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  1. RAHINAH IBRAHIM Stanford University Architect JORGE FUENTES Stanford University Construction Manager CRAIG LONG Kansas University Engineer ROXANNE ZOLIN Stanford University Owner River 2001

  2. SACRAMENTO, CALIFORNIA, USA Seismic Zones Map Wind Speed Zones Map Precipitation: Temperatures: River 2001

  3. DOUBLE SQUARE DESIGN- Site Location Plan River 2001

  4. REDESIGN River 2001

  5. REDESIGN: AEC 1 Perspective View Cafe • Nominal cost for construction • Makes building very compact • Maintain no view for 4 nos Faculty rooms Gym River 2001

  6. REDESIGN: AEC 2 Perspective View Gym • Improving Indoor Quality • Increase Faculty rooms from 16 to 20. • Provide views to all Faculty rooms. • Faculty Lounge has view of river. • Improving Outdoor Quality • Additional landscape-integrated steps • Café on top of 2F floor slab protected from afternoon sun Cafe River 2001

  7. REDESIGN: AEC 2 Auditorium Span • Pratt-Type Truss • Openings for hallways and circulation • Satisfies the architectural constraints River 2001

  8. REDESIGN: AEC 2 Structural Framing • Original Framing • Complex Geometry • Difficult Connections • High Fabrication cost River 2001

  9. REDESIGN: AEC 2 Structural Framing • New Framing • Simplified Geometry • Simpler Connections • Standardized Fabrication  $avings River 2001

  10. Redesign Alternatives Schedule Comparisons River 2001

  11. Redesign Estimates River 2001

  12. General & Redesign Constructibility Issues & Alternatives Limited access to site due to levy Floodplain- best solution is to elevate structure River 2001

  13. SQUARE BASE River 2001

  14. TEAM DESIGN APPROACH Building on piers to minimize hydraulic impact A- Design A Highrise E- Design a Bridge C- Build an Offshore Oil Rig River 2001

  15. SQUARE BASE DESIGN: Concept GOLDEN SECTION -for vertical expansion ROTATING SQUARES - for floor expansion River 2001

  16. SQUARE BASE DESIGN VIEW FROM BUILDING SECTION River 2001

  17. Administration Faculty/Student Offices Classrooms/Lab Terrace Restroom Circulation SQUARE BASE DESIGN 1ST FLOOR PLAN 2ND FLOOR PLAN 3RD FLOOR PLAN River 2001

  18. SQUARE BASE DESIGN: AEC 1 Structural Constraints – Gravity Loads • Live Loads Terrace, Interior Atrium – 100 psf • Corridors, Computer Lab – 100 psf Auditorium, Classrooms & Offices – 50 psf Roof – 20 psf • Dead Loads Cast-in-Place Concrete – 150 lb/ft3 Steel Construction – 60 psf Flooring, ceiling, lights – 15 psf HVAC – 5 psf Partitions – 20 psf Exterior Cladding – 30 psf River 2001

  19. SQUARE BASE DESIGN: AEC 1 Structural Constraints – Lateral Loads • Seismic ConstraintsModerate seismic activity; Zone 3 Occupancy category, I = 1.0 Sandy soil with subsurface rock • Wind ConstraintsDesign wind speed, V45 = 90 mph River 2001

  20. SQUARE BASE DESIGN: AEC 1 Impact of elevated structure • Structural Piers • Lower Level Structure • Foundation Concerns • COST Flooded structure made complicated by... • Water corrosion • Soil difficulty • Additional lateral load River 2001

  21. SQUARE BASE DESIGN: AEC 2 Structural system that defies gravity River 2001

  22. SQUARE BASE DESIGN: AEC 2 Structural Concept Due to Rotating Concept Slender Roof Framing Traditional Framing System “Table Top” Stable Platform River 2001

  23. SQUARE BASE DESIGN: AEC 3 SQUARE BASE DESIGN: AEC 3 100 FT • King-Post Truss • Post Tension Concrete Beam 24” x 30” • 5000 psi Concrete • Steel Tension Cords Difficult Detailing River 2001

  24. SQUARE BASE DESIGN: AEC 4 External trusses to perform aesthetically and structurally • North – South Truss • Cantilever Gravity Resisting System • Cantilever Lateral Resisting System • East - West Truss • Decorative Element • Completes the Square River 2001

  25. SQUARE BASE DESIGN: AEC 5 Flexible open plan design 3RD FLOOR PLAN 1ST FLOOR PLAN 2ND FLOOR PLAN Core Placement Study River 2001

  26. SQUARE BASE DESIGN: AEC 5 Two-Way Slab System • Two-Joists with Elevated Floor • Space for Building Services • Required Additional Columns • Waffle Slab • Column Free Environment • More Complicated HVAC Routing River 2001

  27. SQUARE BASE DESIGN: AEC 6 Freeflowing interior spaces River 2001

  28. SQUARE BASE DESIGN: AEC 6 Open Plan Structural Solutions • Option 1 • Cast-in-Place Concrete Frame • Shear Wall Service Core • Option 2 • Steel/Concrete Composite System • Shear Wall Service Core River 2001

  29. SQUARE BASE DESIGN: AEC 6 Structural Option 1 6”x6” Tube Brace Column 1’x1’ Beam 12”x24” 2nd Floor Plan Two-Way Slab River 2001 3rd Floor Plan

  30. SQUARE BASE DESIGN: AEC 6 Structural Option 2 ¾” Dia. Cable W8x24 Joist W16x26 16” Open-Web Joist 3rd Floor Plan Roof Plan River 2001

  31. SQUARE BASE DESIGN: AEC 6 Foundation System Drilled Pier Array 1-6” Diameter typical CIP Transition Piece to Shear Wall Drilled Pier 2’-6” Diameter / 30’ Depth Foundation Isometric River 2001

  32. Administration Faculty/Student Offices Classrooms/Lab Terrace Restroom Circulation SQUARE BASE DESIGN- AEC 7 Preliminary Core Plan SECTION River 2001

  33. SQUARE BASE DESIGN: CM CM ( slide) Comparison of Estimates (Totals, structural costs and elevating elements costs- piers and floor + lift) Schedule length comparison (including phase milestones) Critical Construction Issues Construction alternatives Concrete vs Concrete/Steel Composite Estimate and schedule River 2001

  34. SQUARE BASE DESIGN: CM CM ( slide) Comparison of Estimates (Totals, structural costs and elevating elements costs- piers and floor + lift) Schedule length comparison (including phase milestones) Critical Construction Issues Construction alternatives Concrete vs Concrete/Steel Composite Estimate and schedule River 2001

  35. Square Alternatives Schedule Comparisons River 2001

  36. Square Alternatives Cost Breakdown River 2001

  37. Square Design Constructibility Issues & Alternatives Long span members Constructing 1st level- before or after 2nd level River 2001

  38. DOUBLE SQUARE DESIGN River 2001

  39. DOUBLE SQUARE DESIGN- Concept GOLDEN SECTION - for floor expansion - for vertical expansion River 2001

  40. Administration Faculty/Student Offices Classrooms/Lab Terrace Restroom Circulation DOUBLE SQUARE DESIGN- Plans River 2001

  41. DOUBLE SQUARE DESIGN- Section & Elevation Exposed Corridor Lobby Atrium River 2001 Balconies

  42. DOUBLE SQUARE DESIGN: AEC 1 More columns for structural stability River 2001

  43. DOUBLE SQUARE DESIGN- AEC 2 Fulfilling fire egress requirements • Minimum distance between exits is 80ft. • Minimum egress width is 5’-6”. • Minimum 20ft atrium opening. • Minimum 3 exits at 2nd Floor, others 2 nos. • Sprinklered egress on all floors. Core Placement Study River 2001

  44. DOUBLE SQUARE DESIGN- AEC 2 Fulfilling fire egress requirements • Minimum distance between exits is 80ft. • Minimum egress width is 5’-6”. • Minimum 20ft atrium opening. • Minimum 3 exits at 2nd Floor, others 2 nos. • Sprinklered egress on all floors. Core Placement Study River 2001

  45. DOUBLE SQUARE DESIGN: AEC 2 Structural Options 1 • Laterally Braced Frame • 4.5” Steel-Concrete Slab • Columns W18x40 typ Composite Column Below Waterline External Bracing Conflicts with Architect’s Vision River 2001

  46. DOUBLE SQUARE DESIGN: AEC 2 Structural Options 2 10” Inclined Slab in Auditorium • Cast-in-Place Frame • 10” Shear Wall • 12” x 12” Columns Typ. Complex Framing Requirements Conflict with CM Budget River 2001

  47. DOUBLE SQUARE DESIGN: AEC 2 Structural Options 3 • Composite Steel-Concrete • SMRF at Exterior Frame • Bracing Auditorium Framing River 2001

  48. Double Square Alternatives Schedule Comparisons River 2001

  49. Double Square Alternatives Cost Breakdown River 2001

  50. Double Square Contractibility Issues & Alternatives Complex structure- more uncertainty, more risk Height limit- 20’ on equipment River 2001

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