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Vertical Load Resisting System Design <br />Roof Framing Rafters <br />Snow Load Fully Exposed <br />pg=0 psf Ct =1.1 <br />Ce =0.9 Is =1.0 ps = 0 psf <br />pf = 0 psf pfmin. = 0.0 psf 0 plf <br />Max Length, L =15.2 ft <br />Tributary Width, WT =16 in <br />RLL =20 psf 13.32 plf <br />Dr =10 psf 13.33 plf <br />PvDL =3 psf 4 plf <br />Load Case: DL w=17 plf <br />M=443 lb-ft <br />Mallowable = Sx x Fb'=1224 lb-ft >443 lb-ft OK <br />Load Case: DL+RLL DL+Lr=27 plf <br />Mdown=681 lb-ft <br />Mallowable = Sx x Fb'=1700 lb-ft >681 lb-ft OK <br />Load Case: DL+S DL+S=17 plf <br />Mdown=443 lb-ft <br />Mallowable = Sx x Fb'=1632 lb-ft >443 lb-ft OK <br />Load Case: DL+0.6W w=21.5 plf <br />Mu=549 lb-ft <br />Mallowable = Sx x Fb' (wind)=2176 lb-ft >549 lb-ft OK <br />Load Case: 0.6DL+0.6W w=15.0 plf <br />Mu=382 lb-ft <br />Mallowable = Sx x Fb' (wind)=2176 lb-ft >382 lb-ft OK <br />DL+0.45W+0.75(RLL or S)21 plf <br />Mdown=530 lb-ft <br />Mallowable = Sx x Fb'=2176 lb-ft >530 lb-ft OK <br />Member Capacity <br />DF-L No.2 <br />2X8 CL CF Ci Cr <br />Fb =900 psi 1.0 1.2 1.0 1.15 1242 psi <br />Fv =180 psi N/A N/A 1.0 N/A 180 psi <br />E =1600000 psi N/A N/A 1.0 N/A 1600000 psi <br />Emin =580000 psi N/A N/A 1.0 N/A 580000 psi <br />Depth, d =7.25 in <br />Width, b =1.5 in <br />Cross-Sectonal Area, A =10.875 in2 <br />Moment of Inertia, Ixx =47.6348 in4 <br />Section Modulus, Sxx =13.1406 in3 <br />Allowable Moment, Mall = Fb'Sxx =1360.1 lb-ft DCR=Mu/Mall =0.40 < 1 Satisfactory <br />Allowable Shear, Vall = 2/3Fv'A =1305.0 lb DCR=Vu/Vall =0.11 < 1 Satisfactory <br />Design Value Adjusted Value <br />projects@evengineersnet.com <br />http://www.evengineersnet.com <br />1414 S Shelton St <br />12/2/2024