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HORIZONTAL WOOD DIAPHRAGM DESIGN <br /> Designer Name: CRH <br /> Job Number: 17134 <br /> Job Name: - Level: ROOF TYP <br /> Diaph.Label: - <br /> A.Diaphragm Dimensions DESIGN DATA: <br /> Imo— B Dimensions <br /> 1.Width(ft) A= 20 <br /> 2.Length(ft) B= 34 <br /> 20ft <br /> Loads; <br /> 1.Wind(lbs) Pi= 2160 <br /> P2= 1706 <br /> 2.Seismic(lbs) P1= 1565 <br /> Imo— 34 ft P2= 1280 <br /> Pi t t P2 <br /> Diaphragm Properties; <br /> B.Shear Diagram 1.(G)Specific gravity of framing Material 0.5 <br /> 2.Panel Grade(Structure 1=1,or Other=2) 2 <br /> 3.Common Nail Size 8 <br /> co <br /> 4.Edge Nailing(O.C.inches) 6 <br /> 1 5.Min.nail penetration in framing(in) 1 3/8 <br /> 6.Min.nom.panel thickness(fraction of in) 3/8 <br /> o-. 7.Min.nominal width of framing member(in) 2 <br /> 8.Framing orientation Case 4 <br /> w <br /> (NDS SW-10&IBC Table 2306.3.1) <br /> 9.Diaphragm type U <br /> (Blocked=B,Unblocked=U) <br /> C.Checks/Calcs. <br /> 1.Maximum length to width ratio(IBC Table 2305.2.3) = = 4:1 vs 1.7 43% <br /> 2.Adjustment for specific gravity = [1-(0.5-G)] = [1-(0.5-0.5)] = 1 <br /> Capacity Load <br /> (PIO (PIO <br /> 3.Shear Capacity vs Load Wind 225 X 1 = 225 > 108 48% <br /> (NDS Tables 3.1A and 3.16) 225 > 85 38% <br /> Seismic 160 X 1 = 160 > 78 49% <br /> 160 > 64 40% <br /> Notes: <br /> Space nails at 12"O.C.max at intermediate framing members(6"O.C.when supprts are space 48"O.C.) <br />