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Dong Engineering Inc. <br />ADU <br />3414 S_TIMBER ST, SANTA ANA, CA 92707 <br />Job #: 250421 <br />Date : 09/17/2025 <br />Plan : 1 <br />BEAM : 5 - RIGDE BM AT LIVING RM <br />Loads(Downward+) <br />Beam Weight 7.9 plf from 0 ft to 16.5 ft <br />Roof Rafter: (14+20)(3) = (DL=42PLF; LLr=60PLF) form 0 to 16.5 <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 907/907 0 <br />2 907/907 0 <br />USE 4 x 10 <br />Critcal Shear = 906 LB @0' 1.5xV/(F'v x A)= 0.18 <br />F'v = 225, A = 32.38 <br />Critcal Moment = 3740 LB-FT @8.25' M/(F'b x S)= 0.66 <br />F'b = 1350, S = 49.91 <br /> Critical Deflection for TL = -0.496 INCH @ 8.25 L/240 = 0.825" <br /> Critical Deflection for LL = -0.271 INCH @ 8.25 L/360 = 0.55" <br />1 2 <br />Moment <br />Shear <br />Deflection <br />16.5' <br />BEAM : 6 - CLG AT BEDRM <br />Loads(Downward+) <br />Beam Weight 6.2 plf from 0 ft to 7.25 ft <br />Roof Primary: (18+20)(11) = (DL=198PLF; LLr=220PLF) form 0 to 7.25 <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 1538/1538 0 <br />2 1538/1538 0 <br />USE 4 x 8 <br />Critcal Shear = 1537 LB @0' 1.5xV/(F'v x A)= 0.4 <br />F'v = 225, A = 25.38 <br />Critcal Moment = 2783 LB-FT @3.75' M/(F'b x S)= 0.74 <br />F'b = 1462, S = 30.66 <br /> Critical Deflection for TL = -0.148 INCH @ 3.5 L/240 = 0.362" <br /> Critical Deflection for LL = -0.077 INCH @ 3.5 L/360 = 0.242" <br />1 2 <br />Moment <br />Shear <br />Deflection <br />7.25' <br />21 of 32