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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 : 3 - DROP @ PORCH <br />Loads(Downward+) <br />Beam Weight 7.4 plf from 0 ft to 9.25 ft <br />Roof Rafter: (14+20)(2) = (DL=28PLF; LLr=40PLF) form 0 to 9.25 <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 349/349 0 <br />2 349/349 0 <br />USE 6 x 6 <br />Critcal Shear = 348 LB @0' 1.5xV/(F'v x A)= 0.08 <br />F'v = 212, A = 30.25 <br />Critcal Moment = 805 LB-FT @4.5' M/(F'b x S)= 0.2 <br />F'b = 1688, S = 27.73 <br /> Critical Deflection for TL = -0.102 INCH @ 4.75 L/240 = 0.462" <br /> Critical Deflection for LL = -0.054 INCH @ 4.75 L/360 = 0.308" <br />1 2 <br />Moment <br />Shear <br />Deflection <br />9.25' <br />BEAM : 4 - HDR AT KITCHEN <br />Loads(Downward+) <br />Beam Weight 4.7 plf from 0 ft to 3.25 ft <br />Roof Rafter: (14+20)(3.2) = (DL=45.5PLF; LLr=65PLF) form 0 to 3.25 <br />Ceiling Joist DL: (4)(7.8) = (DL=31PLF) form 0 to 3.25 <br />Exterior Wall: (15)(2) = (DL=30PLF) form 0 to 3.25 <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 287/286 0 <br />2 287/286 0 <br />USE 4 x 6 <br />Critcal Shear = 286 LB @0' 1.5xV/(F'v x A)= 0.1 <br />F'v = 225, A = 19.25 <br />Critcal Moment = 231 LB-FT @1.5' M/(F'b x S)= 0.1 <br />F'b = 1462, S = 17.65 <br /> Critical Deflection for TL = -0.006 INCH @ 1.5 L/240 = 0.162" <br /> Critical Deflection for LL = -0.002 INCH @ 1.5 L/360 = 0.108" <br />1 2 <br />Moment <br />Shear <br />Deflection <br />3.25' <br />20 of 32