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9 <br />DEFLECTION CHECK: <br />I = 2(20.80 IN4) = 41.6 IN4 <br />E = 1,600,000 PSI <br />L = 13.5' = 162" ACTUAL <br />w = 15 PSF(2') = 30 PLF = 2.5 PLI (DEAD ONLY) <br />w = 20 PSF(2') = 40 PLF = 3.3 PLI (Lr ONLY) <br />Lr DEF = (5wl^4)/(384EI) = 0.4" <br />D DEF = 0.3" <br />DELTA T = 1.5(0.3")+0.4" = 0.85" <br />ALLOW: <br />L/240 = 0.68" <br />L/180 = 0.9" <br />Lr -- OK <br />D+Lr -- OK <br />CHOOSE (2)2X6 DF-L #2 GR.