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, <br /> , <br /> �TOM DESIGN & ENGINEERING, IIQc <br /> STRUCTURAL ANALYSIS& DESIGN <br /> Design loads <br /> Max total moment,M=w L 2/8=570.00(8.50)2/S=5148 ft-Ib <br /> fbx=M(12)/Sx=5148(12)/(73.8 in3)=837 psi <br /> Max total shear, V=w L/2=570.00(8.50)/2=2423 Ib <br /> fv=1.5V/A=1.5(2423)/(39.4 in2)=92.29 psi <br /> Max total reaction,R=w L/2=570.00(8.50)/2=2423 Ib <br /> Beam design-4 x 12,DF No 2 <br /> Beam/Joist properties <br /> Area=39.38 inz <br /> Sx=73.828 in3 <br /> Ix=415.2832 in4 <br /> E=1.60 x 106 psi <br /> Check eending <br /> C�=1.00 <br /> CM=1.00 <br /> Ce =1.00 <br /> Cf =1.10 <br /> C; =1.00 <br /> C� =1.000 <br /> F'b =FbCoCMCiCLCfCrCi <br /> F'b =900(1.15)(1.00)(1.00)(1.00)(1.10)(1.00)(1.00)=1139 psi <br /> F'bx=1139 psi>fbx=837 psi, RESULT=PASS <br /> Check Shear <br /> F'� =F�CD CM Ci CH <br /> F'� =95(1.15)(1.00)(1.00)(1.00) =109 psi <br /> F'v=109 psi>fv=92 psi, RESULT=PASS <br /> Check Deflection <br /> Max allowed deflection-Total(dead+live),8.50(12)/360=0.283 in. <br /> Maximum deflection,y=5/384[w L 4/E I] <br /> Beam deflection=0.002 in. <br /> Live+dead load deflection=0.101 in. <br /> Total deflection= �0.102� in.<0.283 in., RESULT=PASS <br /> 11006 60T"AVE WEST- MUKILTEO WA 98275 ,.'"-" <br /> PHONE (425) 343-7517- FAX(425)493-8388 � <br /> �/ � <br /> / <br />