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Dong Engineering Inc. <br />ADU <br />3109 S.ARTESIA ST UNIT #2, SANTA ANA, CA 92704 <br />Job #: 240517 <br />Date : 10/21/2024 <br />Plan : 1 <br />BEAM : 3 - HDR. @ LIVING ROOM & KITCHEN <br />Loads(Downward+) <br />Beam Weight 6.2 plf from 0 ft to 4.5 ft <br />Exterior Wall: (15)(2) = (DL=30PLF) form 0 to 4.5 <br />Roof Primary: (15+20)(0.7) = (DL=10PLF; LLr=13.3PLF) form 0 to 4.5 <br />Point load @ 3.5 : Load from beam 2 at Support 1(P1) <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 773/773 0 <br />2 2372/2371 0 <br />USE 4 x 8 <br />Critcal Shear = -2371 LB @4.5' 1.5xV/(F'v x A)= 0.62 <br />F'v = 225, A = 25.38 <br />Critcal Moment = 2341 LB-FT @3.5' M/(F'b x S)= 0.62 <br />F'b = 1462, S = 30.66 <br /> Critical Deflection for TL = -0.033 INCH @ 2.5 L/240 = 0.225" <br /> Critical Deflection for LL = -0.018 INCH @ 2.5 L/360 = 0.15" <br />1 2 <br />P1 <br />Moment <br />Shear <br />Deflection <br />4.5' <br />BEAM : 4 - HDR. @ KITCHEN <br />Loads(Downward+) <br />Beam Weight 6.2 plf from 0 ft to 3.25 ft <br />Exterior Wall: (15)(2) = (DL=30PLF) form 0 to 3.25 <br />Ceiling Joist DL: (4)(0.7) = (DL=2.7PLF) form 0 to 3.25 <br />Point load @ 1.5 : Load from beam 2 at Support 2(P1) <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 1612/1612 0 <br />2 1391/1391 0 <br />USE 4 x 8 <br />Critcal Shear = 1612 LB @0' 1.5xV/(F'v x A)= 0.42 <br />F'v = 225, A = 25.38 <br />Critcal Moment = 2374 LB-FT @1.5' M/(F'b x S)= 0.63 <br />F'b = 1462, S = 30.66 <br /> Critical Deflection for TL = -0.021 INCH @ 1.5 L/240 = 0.162" <br /> Critical Deflection for LL = -0.012 INCH @ 1.5 L/360 = 0.108" <br />1 2 <br />P1 <br />Moment <br />Shear <br />Deflection <br />3.25' <br />Page 17 of 21