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PROJECT : PAGE : <br />CLIENT : DESIGN BY : <br />JOB NO. : DATE : REVIEW BY : <br />INPUT DATA <br />DL = 12 lbs / ft MEMBER SIZE = <br />LL = 20 lbs / ft <br />TL = 32 lbs / ft MEMBER SPAN = 14.00 ft <br />TRIBUTARY WIDTH (TW) = 1.333 ft 16" O.C. <br />ROOF SLOPE = 4 :12 <br />DESIGN SUMMARY <br />L = 14.00 ft <br />TL = 32 lbs/ft <br />R = 299 lbs <br />M = 1,045 ft-lbs <br />S Req'd = 10 in3 <br />A Req'd = 2.5 in2 <br />ΔACTUAL = 0.48 in4 <br />USE MEMBER 2 x 8 AS ROOF RAFTERS (RR-2) <br />w = 43 plf CD = 1.00 <br />CM = 1.00 <br />R= (w*TW)/2 = 299 lbs Ct = 1.00 <br />CF = 1.20 <br />M= (w*L2) / 8 = 1,045 ft-lbs Cfu = 1.00 <br />Cr = 1.15 <br />S = (M*12) / F'b = 10 in3 Ci = 1.00 <br />Cc = 1.00 <br />A= (1.5*R)/Fv = 2.5 in2 <br />ΔACTUAL 5*w*L4*1728 = 0.48 in4 <br />384*I*E <br />=32.93 in4 <br />ANALYSIS <br />2 x 8 Properties <br />b = 2.00 in E = Ex =1600000 psi F'b (psi)= 1242 <br />d = 8.00 in Fb = 900 psi Fv (psi)= 180 <br />b' = 1.50 in Fv = 180 psi <br />d' = 7.25 in <br />A = 10.88 in2 <br />S = 13.14 in3 <br />I = 47.63 in4 <br />ΔALLOW 0.700 in4 <br />S Calc'd= 10.10 in3 Sx provided >S Calc'd GOOD <br />A Calc'd= 2.49 in2 A provided >A Calc'd GOOD <br />ΔACTUAL=0.484 in4 ΔALLOW >ΔACTUAL GOOD <br />I Calc'd= 32.93 in4 >I Calc'd GOOD <br />JAVC ENGINEERING CALC's ADDITION TO EXISTING S.F.R. <br />122 NORTH BEWLEY STREET J. VEGA <br />0018 10/9/2023 E. CHAVEZ <br />Wood Beam Design Base on NDS 2018 ROOF RAFTERS (RR-2) <br />2 x 8 <br />I provided <br />Douglas Fir-Larch No. 2 <br />HOLD - 122 N <br />Bewley St9/24/2024