Wind Design Considerations for Steel Joists and Joist Girders - SEAoT

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LRFD Design ProcedureP n = 2 M p L yl / aWhere:P n = Nominal uplift capacityM p = Plastic moment capacity of plate perunit length= F y ZZ = t 2 / 4L yl = Length of yield linea = 2.3 tφ = 0.90 (AISC-LRFD resistance factor forbending)φP n = Design uplift strengthSEAoT State Conference November 6-8, 2008 Houston TX SEAoT - 68
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 0.125 50 1 0.195 0.288 1.903 1.55 3.714 0.125 50 1.5 0.195 0.288 2.403 1.96 5.574 0.125 50 2 0.195 0.288 2.903 2.36 7.424 0.125 50 2.5 0.195 0.288 3.403 2.77 9.284 0.125 50 3 0.195 0.288 3.903 3.18 11.146 0.125 50 4 0.195 0.288 4.903 3.99 14.856 0.125 50 5 0.195 0.288 5.903 4.80 18.564 0.156 50 1 0.304 0.359 2.127 2.16 4.634 0.156 50 1.5 0.304 0.359 2.627 2.67 6.954 0.156 50 2 0.304 0.359 3.127 3.18 9.274 0.156 50 2.5 0.304 0.359 3.627 3.68 11.584 0.156 50 3 0.304 0.359 4.127 4.06 13.906 0.156 50 4 0.304 0.359 5.127 5.21 18.536 0.156 50 5 0.304 0.359 6.127 6.09 23.16SEAoT State Conference November 6-8, 2008 Houston TX SEAoT - 69
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: P n = 2 M p L yl / aASD Design Proc
Page 71 and 72: 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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