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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 : 1 - HDR AT BEDRM <br />Loads(Downward+) <br />Beam Weight 4.7 plf from 0 ft to 5.5 ft <br />Roof Primary: (18+20)(6.5) = (DL=117PLF; LLr=130PLF) form 0 to 5.5 <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 693/692 0 <br />2 692/692 0 <br />USE 4 x 6 <br />Critcal Shear = 692 LB @0' 1.5xV/(F'v x A)= 0.24 <br />F'v = 225, A = 19.25 <br />Critcal Moment = 951 LB-FT @2.75' M/(F'b x S)= 0.44 <br />F'b = 1462, S = 17.65 <br /> Critical Deflection for TL = -0.067 INCH @ 2.75 L/240 = 0.275" <br /> Critical Deflection for LL = -0.034 INCH @ 2.75 L/360 = 0.183" <br />1 2 <br />Moment <br />Shear <br />Deflection <br />5.5' <br />BEAM : 2 - HDR AT BATH <br />Loads(Downward+) <br />Beam Weight 4.7 plf from 0 ft to 4.25 ft <br />Roof Rafter: (14+20)(7.5) = (DL=105PLF; LLr=150PLF) form 0 to 4.25 <br />Ceiling Joist DL: (4)(4.5) = (DL=18PLF) form 0 to 4.25 <br />Exterior Wall: (15)(3) = (DL=45PLF) form 0 to 4.25 <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 686/686 0 <br />2 686/686 0 <br />USE 4 x 6 <br />Critcal Shear = 685 LB @0' 1.5xV/(F'v x A)= 0.23 <br />F'v = 225, A = 19.25 <br />Critcal Moment = 726 LB-FT @2' M/(F'b x S)= 0.33 <br />F'b = 1462, S = 17.65 <br /> Critical Deflection for TL = -0.03 INCH @ 2 L/240 = 0.212" <br /> Critical Deflection for LL = -0.014 INCH @ 2 L/360 = 0.142" <br />1 2 <br />Moment <br />Shear <br />Deflection <br />4.25' <br />19 of 32