Wind Design Considerations for Steel Joists and Joist Girders - SEAoT

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Recommended Bearing Seat Designto Resist Uplift LoadsLength Thickness F yL WM pa L YLP n/ Ω P weldL s(in.) t (in.) (ksi) (in.) (in.-k/in.) (in.) (in.) (kips) (kips)4 0.188 50 1 0.442 0.432 2.358 2.89 5.584 0.188 50 1.5 0.442 0.432 2.858 3.50 8.374 0.188 50 2 0.442 0.432 3.358 4.11 11.174 0.188 50 2.5 0.442 0.432 3.858 4.72 13.964 0.188 50 3 0.442 0.432 4.358 4.89 16.756 0.188 50 4 0.442 0.432 5.358 6.56 22.336 0.188 50 5 0.442 0.432 6.358 7.34 27.918 0.188 50 6 0.442 0.432 7.358 9.00 33.504 0.250 50 1 0.781 0.575 2.806 4.57 7.424 0.250 50 1.5 0.781 0.575 3.306 5.38 11.144 0.250 50 2 0.781 0.575 3.806 6.19 14.854 0.250 50 2.5 0.781 0.575 4.306 6.51 18.564 0.250 50 3 0.781 0.575 4.806 6.51 22.276 0.250 50 4 0.781 0.575 5.806 9.45 29.706 0.250 50 5 0.781 0.575 6.806 9.76 37.128 0.250 50 6 0.781 0.575 7.806 12.70 44.54SEAoT State Conference November 6-8, 2008 Houston TX SEAoT - 70
Recommended Bearing Seat Designto Resist Uplift Loads• The P weld strength given in the preceeding tablesdoes not account for the transverse loading ofthe weld due to uplift and thus could bemultiplied by 1.5.• Where a joist seat has been detailed for a boltedconnection, and for any reason the bolt is notutilized, the empty slot in the bearing seat legseverely diminishes uplift capacity. In such acondition, if a weld and no bolt is to be used on aslotted bearing seat, then the weld should beapplied within the empty slot.SEAoT State Conference November 6-8, 2008 Houston TX SEAoT - 71
Page 2 and 3:
Introduction‣ Commercial manufact
Page 4 and 5:
Windstorm Damage to Roof in Texas05
Page 6 and 7:
Hurricane Charley Category 4 StormA
Page 8 and 9:
Population Trends in Hurricane-Pron
Page 10:
Roof Design to Resist Uplift Loads
Page 15 and 16:
2005 SJI Standard Specification for
Page 17 and 18:
2005 SJI Code of Standard Practice1
Page 20 and 21: 2005 SJI Code of Standard Practice6
Page 23 and 24: 2006 International Building Code•
Page 25 and 26: Standards and Codes• 2005 SJI Sta
Page 27 and 28: ASCE 7-05 Basic Wind Speed MapSEAoT
Page 29 and 30: ASCE 7-05 Specified Wind LoadsSEAoT
Page 31 and 32: ASCE 7-05 Specified Wind LoadsWhat
Page 33 and 34: ASCE 7-05 Specified Wind Loads• M
Page 36 and 37: Properly Applying Wind Loads toStee
Page 38 and 39: Properly Applying Wind Loads toStee
Page 41 and 42: Wind Design Considerations forSteel
Page 43 and 44: Wind Design Considerations forSteel
Page 45 and 46: Properly Applying Lateral Loads toS
Page 47 and 48: Properly Applying Lateral Loads toS
Page 49 and 50: Typical Roof Framing using K-Series
Page 51 and 52: Profile of SJI Standard K-SeriesOpe
Page 53 and 54: Joist Seat Test Program Parameters
Page 55 and 56: Experimental Test SetupINSTRUMENTAT
Page 57 and 58: Typical Load-Deformation BehaviorTe
Page 59 and 60: Yield Line PatternsShort and Long A
Page 61 and 62: Yield Line Analysis Using Virtual W
Page 63 and 64: Research Programs Recommendations
Page 65 and 66: 2005 SJI Standard Specification for
Page 67 and 68: P n = 2 M p L yl / aASD Design Proc
Page 69: Recommended Bearing Seat Designto R
Page 77 and 78: Design ExampleDimensions:Length, l
Page 79 and 80: Design ExampleBasic wind speed, fro
Page 81 and 82: Steel Joist and Joist Girder Layout
Page 83 and 84: Steel Joist Design20K6 Rod Web @ 40
Page 85 and 86: Steel Joist DesignDesign DataEnd We
Page 87 and 88: Placement of Bridging to ResistUpli
Page 93 and 94: Summary and Conclusions• Wind for
Page 95: Any Questions?SJI Website: http://w
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Wind Design Considerations for Steel Joists and Joist Girders - SEAoT

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