Wind Design Considerations for Steel Joists and Joist Girders - SEAoT

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ASCE 7-05 Specified Wind LoadsWhat constitutes Net Uplift?DL1.65( ↓) + WL( ↓)( DL + WL)=0.6F A= F A1.65DL + 1.65WL =Amplified DL resistance by 1.65 for uplift is notdesirable!So,DL ↓ + 1.65WL ↑ = F A( ) ( )0.6DL + WL =yyyg0.6F AygF AgyggSEAoT State Conference November 6-8, 2008 Houston TX SEAoT - 32
ASCE 7-05 Specified Wind Loads• Maximum Dead Load (for gravity loading)• Minimum Dead Load (for wind uplift)• Collateral Load (also for wind uplift)Collateral loads represent a category of deadloads which are not part of the building structurebut are required for the building’s function.These include: Mechanical equipment, piping,electrical equipment, conduit, sprinkler pipingfire proofing, ceilings, etc.SEAoT State Conference November 6-8, 2008 Houston TX SEAoT - 33
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: ASCE 7-05 Specified Wind LoadsWhat
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 67 and 68: P n = 2 M p L yl / aASD Design Proc
Page 69 and 70: Recommended Bearing Seat Designto R
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 89 and 90:
Page 91 and 92:
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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