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Roof Rafter Check Roof Rafter <br /> Robb Residence <br /> Wood Rafters 2x8, 16" OC <br /> Member Information <br /> Reference Design Values, <br /> Section Properties Rafters Largest Member SP No 2 <br /> Section - Single 2x8 from Rafters Fb:= 925psi <br /> Length:= 11.75ft F�:= 175psi <br /> Depth := 7.25in + 0.75in W/Plywood Decking <br /> E:= 1400000psi <br /> Width:= 1.5in <br /> Spacing between Rafters <br /> Area := Depth•Width <br /> Leff:= 16in <br /> Area = 12•in� <br /> WSolar�- 3psf <br /> Width�Depth2 <br /> Sx�- 6 �Solar�- WSolar��eff <br /> Sx = 16•in3 <br /> �Solar-4-plf <br /> I ._ Width•Depth3 <br /> X 12 D• 2.Opsf+ 3plf <br /> �oist�- �-eff' <br /> IX = 64•in4 D• • = 5.667•plf <br /> �oist <br /> Known Adjustment Factors <br /> NDS 4.3.1 <br /> CF:= 1.0 Size factor C�:= 1.0 Incising factor <br /> CM := 1,0 Wet service factor Cr:= 1.15 Repetitive member factor <br /> Ct:= 1.0 Temperature factor Cp:= 0.9 Load duration factor <br /> Sheet 14 <br />