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Dong Engineering Inc. <br />ADU <br />1225 N.WEST ST, SANTA ANA, CA 92703 <br />Job #: 240363 <br />Date : 07/31/2024 <br />Plan : 1 <br />BEAM : 1 - HDR AT BEDROOM 1 <br />Loads(Downward+) <br />Beam Weight 6.2 plf from 0 ft to 6.25 ft <br />Roof Rafter: (11+20)(11) = (DL=121PLF; LLr=220PLF) form 0 to 6.25 <br />Ceiling Joist DL: (4)(9.2) = (DL=37PLF) form 0 to 6.25 <br />Exterior Wall: (15)(2) = (DL=30PLF) form 0 to 6.25 <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 1295/1294 0 <br />2 1295/1294 0 <br />USE 4 x 8 <br />Critcal Shear = 1294 LB @0' 1.5xV/(F'v x A)= 0.34 <br />F'v = 225, A = 25.38 <br />Critcal Moment = 2019 LB-FT @3' M/(F'b x S)= 0.54 <br />F'b = 1462, S = 30.66 <br /> Critical Deflection for TL = -0.08 INCH @ 3 L/240 = 0.312" <br /> Critical Deflection for LL = -0.042 INCH @ 3 L/360 = 0.208" <br />1 2 <br />Moment <br />Shear <br />Deflection <br />6.25' <br />BEAM : 2 - DROP AT PORCH <br />Loads(Downward+) <br />Beam Weight 7.4 plf from 0 ft to 4.5 ft <br />Roof Rafter: (11+20)(11) = (DL=121PLF; LLr=220PLF) form 0 to 4.5 <br />Ceiling Joist DL: (4)(9.2) = (DL=37PLF) form 0 to 4.5 <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 867/867 0 <br />2 867/867 0 <br />USE 6 x 6 <br />Critcal Shear = 867 LB @0' 1.5xV/(F'v x A)= 0.2 <br />F'v = 212, A = 30.25 <br />Critcal Moment = 975 LB-FT @2.25' M/(F'b x S)= 0.25 <br />F'b = 1688, S = 27.73 <br /> Critical Deflection for TL = -0.029 INCH @ 2.25 L/240 = 0.225" <br /> Critical Deflection for LL = -0.017 INCH @ 2.25 L/360 = 0.15" <br />1 2 <br />Moment <br />Shear <br />Deflection <br />4.5' <br />15 of 18