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STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

Rocky Mountain Steel Construction Association. Structural Engineers Association of Colorado. Structural Engineers Association of Colorado Steel Liaison Committee. STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES. Past products from SEAC and RMSCA.

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STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

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  1. Rocky Mountain Steel Construction Association Structural Engineers Association of Colorado Structural Engineers Association of Colorado Steel Liaison Committee STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  2. Past products from SEAC and RMSCA • AESS Guidelines – Prepared to assist in defining finishing and cost issues associated with AESS Steel • Input for the 2005 AISC Code of Standard Practice • Checklist for Structural Design Drawings • Pre-Detailing Meeting Agenda/Checklist • Current project: Improving the Shop Drawing Process

  3. ENGINEERING TOLERANCE CONSTRUCTABILITY STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  4. engineering consulting structural engineer = EOR architect = AOR STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  5. EOR’s primary role(s) • design team member • assist the AOR with issues that involve engineering • prime design team contact to the structural steel detailer • insures the completed structure is safe and performs as expected STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  6. information gathering • AOR to determine skin type • AOR to coordinate application with the EOR • EOR to insure structural adequacy at exterior wall interface • EOR to define connection between exterior wall and structural frame STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  7. what is the goal? • produce clear information on the design documents • assure all parties know who is responsible for what aspect of the design • meet with fabricators, erectors and exterior wall suppliers • insure that the GC understands the desired final expectations STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  8. illustrate the eccentricities for which the steel frame is designed and/or the eccentricities for which the exterior wall must be designed STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  9. keeping the column line pushed out as far as possible could result in cost savings to the owner STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  10. check points • if possible, move the column line outward • understand the exterior wall system and the desired interface with the structural frame • meet with fabricators, erectors and exterior wall suppliers • understand the tolerances involved with the project STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  11. + under tolerance over - STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  12. STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  13. 3 : the allowable deviation from a standard; especially: the range of variation permitted in maintaining a specified dimension STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  14. 3 : the allowable deviation from a standard; especially: the range of variation permitted in maintaining a specified dimension STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  15. the range of variation permitted in maintaining a specified dimension STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  16. STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  17. contract documents STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  18. design team may not know WHO contract design documents team STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  19. owner retains consultants contract contract documents progress general contractor is retained documents steel and exterior wall subs are secured STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  20. general contractor releases DD docs for bid design team issues DD contract documents contract general contractor has steel sub under contract design team issues CD’s documents general contractor releases steel sub to proceed with detailing design team issues 100% CD’s STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  21. project sequencing schedule STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  22. steel sub starts general contractor detailingapproval steel framecritical path project begins steel to be purchased schedule STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  23. steel framecritical path ? schedule STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  24. must happen submittal schedule schedule approval dwgs shop dwgs Sub’s RFI’s erection sched of coordination of design STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  25. clear intent predictable STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  26. leveling the playing field preparation STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  27. section 6.4 “fabrication tolerance” STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  28. sweep roll camber steel tolerance STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  29. section 7.5 “installation of anchor rods foundation bolts and other embedded items” STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  30. section 7.12 “structural steel frame tolerance” STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  31. section 7.13 “erection tolerances” STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  32. STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  33. section 7.13.2 “in the design of steel structures, the owners designated representative for design shall provide for the necessary clearance and adjustments for material furnished by other trades to accommodate the mill tolerance, fabrication tolerances and erection tolerance as accepted in this Code for the Structural Steel frame.” STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  34. responsibility responsibility STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  35. suggested details dimensions and usage of tolerances STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  36. -associated AISC tolerances- • section 6.4 fabrication tolerance • section 7.5 installation of anchor rods, foundation bolts and other embedded items • section 7.12 structural steel frame tolerances • section 7.13 erection tolerances STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  37. STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  38. 2005 AISC code of standard practice -section 7.12- “the accumulation of the mill tolerance and the fabrication tolerances shall not cause the erection tolerance to be exceeded” STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  39. 2005 AISC code of standard practice -section 7.13- “erection tolerances shall be defined relative to the member working points and working lines” STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  40. STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  41. the more understanding the design team has of the interface of the structural frame to the exterior wall system, tolerance will become a useful tool and not a problem for the construction team STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  42. STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  43. STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  44. STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  45. STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  46. fewer restrictions at the roof has or das will need to be field installed appropriate flange width STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  47. projectsuccess STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  48. good communications • heroes are rewarded if proper attention is given • review and understand structural framing system to control cost • select edge materials that will perform with the exterior wall system STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  49. edge materials that account for tolerance variations • clearly show all necessary offset dimensions on the design documents • use the AISC code of standard practice, ASTM and experiences of the construction team STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

  50. ENGINEERING TOLERANCE CONSTRUCTABILITY STEEL BUILDING EXTERIOR WALL INTERFACE ISSUES

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