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Dong Engineering Inc. <br />ADU <br />1602 W BROOK ST UNIT 2, SANTA ANA, CA 92703 <br />Job #: 240190 <br />Date : 05/14/2024 <br />Plan : 1 <br />BEAM : 5 - DROP AT PORCH <br />Loads(Downward+) <br />Beam Weight 4.7 plf from 0 ft to 6.5 ft <br />Roof Primary: (15+20)(2.8) = (DL=41.2PLF; LLr=55PLF) form 0 to 6.5 <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 328/328 0 <br />2 328/328 0 <br />USE 4 x 6 <br />Critcal Shear = 328 LB @0' 1.5xV/(F'v x A)= 0.11 <br />F'v = 225, A = 19.25 <br />Critcal Moment = 533 LB-FT @3.25' M/(F'b x S)= 0.24 <br />F'b = 1462, S = 17.65 <br /> Critical Deflection for TL = -0.052 INCH @ 3.25 L/240 = 0.325" <br /> Critical Deflection for LL = -0.028 INCH @ 3.25 L/360 = 0.217" <br />1 2 <br />Moment <br />Shear <br />Deflection <br />6.5' <br />BEAM : C1 - C.J. 2X8 DLF#2 @ 16" O.C. (MAX SPAN 20'- <br />3") <br />Loads(Downward+) <br />Ceilig Joist: (4+10)(1.3) = (DL=5.3PLF; LLr=13.4PLF) form 0 to 20.25 <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 189/189 0 <br />2 189/189 0 <br />USE 2 x 8 <br />Critcal Shear = 189 LB @0' 1.5xV/(F'v x A)= 0.11 <br />F'v = 225, A = 10.88 <br />Critcal Moment = 958 LB-FT @10.12' M/(F'b x S)= 0.56 <br />F'b = 1552, S = 13.14 <br /> Critical Deflection for TL = -0.928 INCH @ 10.12 L/240 = 1.012" <br /> Critical Deflection for LL = -0.663 INCH @ 10.12 L/360 = 0.675" <br />1 2 <br />Moment <br />Shear <br />Deflection <br />20.25' <br />24 of 26