SPECIFICATION FOR THE DESIGN OF - Transcon Steel

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92 Commentary on the Prescriptive Method for One and Two Family Dwellings - 2004 Roof Area 2 Factored Wind Load = -26.72 (1.6) = -42.75 psf Roof Area 3 Factored Wind Load = -16.89 (1.6) = -27.02 psf Factored Roof Dead Load = 0.9(7 psf) = 6.3 psf A plane frame truss analysis yields the following axial loads in the members labeled in the truss model shown. Member 1 -327.07 lb Member 2 -345.97 lb Area 2 Member 3 -417.63 lb Member 4 -398.72 lb 1 Member 5 275.58 lb Member 6 -1.06 lb Maximum load is in member 3, P = 417.63 lb V all per No. 8 screw = 165 lb 2 3 5 6 Area 3 4 No. of screws required = 417.63 = 2.54 screws, Use 3-No. 8 screws at each end of strap. F9 Ridge Tension Strap Design Calculate the minimum thickness of 1.25” steel strap with 6-No. 8 screws. T = A (0.6F y ) T = 6(165) = 1320 lb 1320 = [1.25(t)][33,000(0.6)(1.33)] t = 0.040 in Use 43-mil strap.
Commentary on the Prescriptive Method for One and Two Family Dwellings - 2004 93 REFERENCES (AFPA, 1995), Wood Frame Construction Manual, American Forest and Paper Association, Washington DC, 1995. (AISC, 1990), Steel Design Guide Series No. 3, Serviceability Design Considerations for Low-Rise Buildings, American Institute of Steel Construction, Chicago IL, 1990. (AISC, 1991), Structural Performance Requirements For Domestic Steel Framing, Australian Institute of Steel Construction, Milsons Point, Australia, 1991. (AISI, 1998), Shear Wall Design Guide, American Iron and Steel Institute, Washington, DC, 1998. (AISI, 1999), Specification for the Design of Cold-Formed Steel Structural Members, 1996 Edition with 1999 Supplement, American Iron and Steel Institute, Washington, DC, 1999. (AISI, 2001a), Standard for Cold-Formed Steel Framing – General Provision, American Iron and Steel Institute, Washington, DC, 2001. (AISI, 2001b), Standard for Cold-Formed Steel Framing – Truss Design, American Iron and Steel Institute, Washington, DC, 2001. (AISI, 2001c), Standard for Cold-Formed Steel Framing – Header Design, American Iron and Steel Institute, Washington, DC, 2001. (AISI, 2001d), Standard for Cold-Formed Steel Framing – Prescriptive Method for One and Two Family Dwellings, American Iron and Steel Institute, Washington, DC, 2001. (AISI, 2004), 2004 Supplement to the Standard for Cold-Formed Steel Framing – Prescriptive Method for One and Two Family Dwellings, 2001 Edition, American Iron and Steel Institute, Washington, DC, 2004. (ASCE, 1998), ASCE 7, Minimum Design Loads for Buildings and Other Structures, American Society of Civil Engineers, Reston VA, 1998. (ASTM, 2000), ASTM C954, Standard Specification for Steel Drill Screws for the Application of Gypsum Panel Products or Metal Plaster Bases to Steel Studs From 0.033 in. (0.84 mm) to 0.112 in. (2.84 mm) in Thickness, ASTM International, West Conshohocken PA, 2000. (ASTM, 2001), ASTM C1002, Standard Specification for Steel Self-Piercing Tapping Screws for the Application of Gypsum Panel Products or Metal Plaster Bases to Wood Studs or Steel Studs, ASTM International, West Conshohocken PA, 2001. (BOCA, 1997), National Building Code, 1997 Edition, Building Officials and Code Administrators International, Country Club Hills, IL, 1997. (ICC, 2000a), International Building Code, International Code Council Falls Church, VA, 2000. (ICC, 2000b), International Residential Code, International Code Council Falls Church, VA, 2000. (LGSEA, 1998), Technical Note No. 558b-1, Lateral Load Resisting Elements: Diaphragm Design Values, Light Gauge Steel Engineers Association, Washington, DC, 1998. (NAHBRC, 2003), Hybrid Wood and Steel Sole Plate Connection Walls to Floors Testing Report, National Association of Home Builders’ Research Center, Upper Marlboro, MD, 2003. (SBCCI, 1999), Standard Building Code, Southern Building Code Congress International, Birmingham, AL, 1999. Vagh, Dolan and Easterling (2000), Effect of Anchorage and Sheathing Configuration on the Cyclic
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SPECIFICATION FOR THE DESIGN OF - Transcon Steel

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