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Andrew Diehl

Andrew Diehl. “The Comparison of a Pan Joist Concrete System to a Steel Frame System in UMCP Student Housing – Building B”. The Pennsylvania State University Architectural Engineering Department Structural Option 5 th Year Senior Thesis Project.

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Andrew Diehl

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  1. Andrew Diehl “The Comparison of a Pan Joist Concrete System to a Steel Frame System in UMCP Student Housing – Building B” The Pennsylvania State University Architectural Engineering Department Structural Option 5th Year Senior Thesis Project

  2. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Outline • Existing Building • Design Criteria • Pan Joist Concrete System • Steel Frame System • Cost Comparison • Construction Management • Architecture • Conclusion

  3. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University UMCP Student Housing – Building B

  4. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Project Design Team • Owner – Collegiate Housing Foundation • Architect – Design Collective, Inc. • Construction Manager – Whiting-Turner Contracting • Structural Engineer – Hope Furrer Associates, Inc. • Civil Engineer – A. Morton Thomas & Associates • MEP Engineer – Burdette, Koehler, Murphy & Associates • Geotechnical Engineer – Froehling & Robertson, Inc. • Landscape Architect – Mahan Rykiel Associates, Inc.

  5. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Location The University of Maryland • College Park, Maryland • Easy access to the big cities (Baltimore and Washington, DC) • South Campus Commons

  6. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Existing Building Building Stats • 5 stories • 77,445 square feet • Dormitory - R-2 classification (BOCA 1999) • 2-4 Bedroom Fully-Furnished Apartments • Lobby and Student Lounges • Designed using BOCA 1996

  7. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Existing Building, cont’d Architecture • Facade – combination of brick and pre-cast cladding • Roof – hipped roof that conceals mechanical system • Cavity wall construction

  8. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Existing Building, cont’d Mechanical System • Multi-zone system • 2 – 4500 cfm Centrifugal Rooftop Chillers • 3 – Split System Air Conditioning Units • Electric Heating Units Electrical/Lighting System • 16 panel boards • 3 phase 120V / 208V power • Fluorescent Lighting

  9. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Existing Building, cont’d Construction Management • Project Cost - ~$52 million (includes 4 other buildings) • Duration – November 2000 to August 2002 • Design-Build delivery system • Demolition was required of previous building • Utility and transportation service could not be disrupted

  10. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Existing Structural System Gravity System • Hambro composite open web steel joists • Light gauge metal load-bearing exterior walls • Tube steel columns (span to 3rd floor) • Pre-fabricated wood trusses • Wood load-bearing walls in the 5th floor • 8” reinf. CMU retaining wall with strip and spread footings Lateral System • X-braced light gauge metal stud shear walls

  11. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Existing Structural System Hambro Composite Joists

  12. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Design Criteria • Keep floor-to-floor height the same (9’-10”) • Minimize structural impact in floor plan • Open up the ceiling plenum • Minimize cost impact

  13. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Pan Joist Concrete Design Decisions • 40” pans • 4 ksi normal weight concrete • Grade 60 reinforcement • Slab thickness is 5” (fireproofing)

  14. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Pan Joist Concrete, cont’d Slab Design • 5” thick • Flexural Reinforcement = #3s @ 5” • S&T Reinforcement = #3s @ 5”

  15. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Pan Joist Concrete, cont’d Joist Design • 4’ modules • 8” x 7” joists

  16. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Pan Joist Concrete, cont’d Girder Design

  17. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Pan Joist Concrete, cont’d Girder Design, cont’d • Formed from 40” pans • 12”x15” and 12”x18” girders Column Design • Bi-axial columns – 14”x14” with 8 #6s • Uni-axial columns – 12”x12” with 4 #6s

  18. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Pan Joist Concrete, cont’d Bar Cut-offs Negative Reinforcement Positive Reinforcement

  19. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Pan Joist Concrete, cont’d 1st Floor Framing Plan

  20. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Pan Joist Concrete, cont’d Recommendation • System did not meet design requirements • Column interference • Increase size of ceiling plenum • Additional cost ~$1.3 million Pan Joist Concrete is not viable

  21. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Steel Frame Design Decisions • Grade 50 steel • United Steel Deck Manufacturer • Bolted Connections

  22. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Steel Frame, cont’d Slab Design • United Steel Deck Manual • 18 gage UF2X Form Deck • 4 ½” concrete slab with 44 – W4.0x4.0 weld wire fabric

  23. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Steel Frame, cont’d Beam and Column Design • 1.2D + 1.6L • Meet AISC design requirements • Beam Design Charts • Column Design Charts • W-shapes

  24. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Steel Frame, cont’d Beam and Column Design, cont’d

  25. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Steel Frame, cont’d 1st Floor Framing Plan

  26. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Steel Frame, cont’d Bolted Connection • 6”x8”x1/8” A36 steel angle • 2 bolts

  27. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Steel Frame, cont’d Recommendation • System did not meet design requirements • Column interference • Increase size of ceiling plenum • Additional cost ~$600,000 Steel Frame is not viable

  28. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Cost Comparison Cost Comparison • Based from R.S. Means

  29. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Construction Management Site Layout • Easy flow around the building for trades and deliveries • Easy access to the lay-down area • Steel deliveries can be picked off truck and put into place • Temporary power is accessible under the site

  30. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Construction Management, cont’d Site Layout, cont’d

  31. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Construction Management, cont’d Formwork Design • Column forms are ½” plywood forms with 2x4 studs and wales • Stud spacing is 12” O.C. • Wale spacing is 18” O.C. • Column forms can be reused • Joist and Girder forms are standard 40” pans • 40” pan forms will remain in place

  32. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Construction Management, cont’d Formwork Design, cont’d

  33. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Architecture Facade Design • Accent the structural design • Visually stimulating • Done by visual breaks in the facade • At column locations • White colored bricks • Disadvantages – increase in labor costs

  34. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Architecture, cont’d Facade Design, cont’d

  35. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Architecture, cont’d Interior Exposure of Structure • Visually stimulating • Not usually seen in buildings • See mechanical and electrical systems • Not done in dwelling areas • Only can be done in 2 rooms in building (lobby and lounge) • Disadvantages – increase costs in mechanical and electrical labor

  36. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Conclusions • Both designs did not meet design requirements • Column interference • Ceiling needs to be lowered • Costs the owner significant amount of money Hambro Composite Joists is viable

  37. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Thank You • Scott Stewart, PE (Hope Furrer Associates, Inc.) • Design Collective, Inc. • Dr. Thomas Boothby • Friends • Family

  38. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Questions

  39. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Foundations Pan Joist Concrete System • More Dead Load • Must watch punching shear at columns • Increase in size and thickness of footings Steel Frame System • Slight increase in Dead Load • Must watch punching shear at columns • Slight increase in size and thickness

  40. Andrew Diehl 5th Year AE Senior Thesis Structural Option The Pennsylvania State University Structural Scheduling Pan Joist Concrete System • Set-up and stripping of formwork • Pouring and curing of concrete • Laying of reinforcement cage • ~ 1 month added to schedule Steel Frame System • Erection of members • Connection Detailing • ~ 2-3 weeks added to schedule

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