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Dong Engineering Inc. <br />2 ADU'S <br />512-514 HUYLARS LN, SANTA ANA, CA 92703 <br />Job #: 250195 <br />Date : 05/21/2025 <br />Plan : 1 <br />BEAM : R1 - R.R. 2X8 DFL#2 @ 16" O.C. (W/ PURLIN) <br />Loads(Downward+) <br />Roof Rafter: (14+20)(1.3) = (DL=18.7PLF; LLr=26.7PLF) form 0 to 16.75 <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 471/472 0 <br />2 289/289 0 <br />USE 2 x 8 <br />Critcal Shear = 324 LB @3.25' 1.5xV/(F'v x A)= 0.2 <br />F'v = 225, A = 10.88 <br />Critcal Moment = 917 LB-FT @10.5' M/(F'b x S)= 0.54 <br />F'b = 1552, S = 13.14 <br /> Critical Deflection for TL = -0.382 INCH @ 10.25 L/240 = 0.675" <br /> Critical Deflection for LL = -0.224 INCH @ 10.25 L/360 = 0.45" <br />1 2 <br />Moment <br />Shear <br />Deflection <br />3.25'13.5' <br />22 of 26