Laserfiche WebLink
Vertical Load Resisting System Design <br />Roof Framing Rafters <br />Snow Load Fully Exposed <br />pg=4 psf Ct =1.1 <br />Ce =0.9 Is =1.0 <br />pf = 3 psf <br />pfmin. = 2.5 psf <br />ps = 3 psf Conservatively (Cs=1)2.52 plf <br />Max Length, L =12 ft (Rafter maximum Allowable Horizontal Span) <br />Tributary Width, WT =12 in <br />Dr =10 psf 10 plf <br />PvDL =3 psf 18 plf <br />Load Case: DL+0.75(0.6W+0.7S) <br /> 0.75(Pnet+Ps)+ Ppvcos(θ)+PDL=29 plf <br />Mdown=460 lb-ft <br />Mallowable = Sx x Fb' (wind)=2334 lb-ft >460 lb-ft OK <br />Load Case: DL+0.7S <br /> Ps+ Ppvcos(θ)+PDL=25 plf <br />Mdown=402 lb-ft <br />Mallowable = Sx x Fb' (wind)=2334 lb-ft >402 lb-ft OK <br />Load Case: DL+0.6W <br /> Pnet+ Ppvcos(θ)+PDL=30.5 plf <br />Max Moment, Mu=488 lb-ft <br />Mallowable = Sx x Fb' (wind)=3247 lb-ft >488 lb-ft OK <br />Pv max Shear=118.6 lbs <br />Shear, Vu=wL/2+Pv Point Load =287 lbs <br />Max Shear, Vu=wL/2+Pv Point Load =287 lb <br />Member Capacity <br />DF-L No.2 <br />2X10 CL CF Ci Cr KF φ λ <br />Fb =900 psi 1.0 1.1 1.0 1.15 2.54 0.85 0.8 1139 psi <br />Fv =180 psi N/A N/A 1.0 N/A 2.88 0.75 0.8 180 psi <br />E =1600000 psi N/A N/A 1.0 N/A N/A N/A N/A 1600000 psi <br />Emin =580000 psi N/A N/A 1.0 N/A 1.76 0.85 N/A 580000 psi <br />Depth, d =9.25 in <br />Width, b =1.5 in <br />Cross-Sectonal Area, A =13.875 in2 <br />Moment of Inertia, Ixx =98.9316 in4 <br />Section Modulus, Sxx =21.3906 in3 <br />Allowable Moment, Mall = Fb'Sxx =2029.4 lb-ft DCR=Mu/Mall =0.20 < 1 Satisfactory <br />Allowable Shear, Vall = 2/3Fv'A =1665.0 lb DCR=Vu/Vall =0.17 < 1 Satisfactory <br />Design Value Adjusted Value <br />projects@evengineersnet.com <br />http://www.evengineersnet.com