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Dong Engineering Inc. <br />NEW MAIN HOUSE & ADU <br />1834 W.3RD ST, SANTA ANA, CA 92703 <br />Job #: 240051 <br />Date : 01/07/2025 <br />Plan : 1 <br />BEAM : R2 - R.R. 2X10#2 @ 16" O.C. <br />Loads(Downward+) <br />Rafter Vaulted: (13+20)(1.3) = (DL=17.4PLF; LLr=26.7PLF) form 0 to 13.5 <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 297/297 0 <br />2 297/297 0 <br />USE 2 x 10 <br />Critcal Shear = 297 LB @0' 1.5xV/(F'v x A)= 0.14 <br />F'v = 225, A = 13.88 <br />Critcal Moment = 1003 LB-FT @6.75' M/(F'b x S)= 0.39 <br />F'b = 1423, S = 21.39 <br /> Critical Deflection for TL = -0.208 INCH @ 6.75 L/240 = 0.675" <br /> Critical Deflection for LL = -0.126 INCH @ 6.75 L/360 = 0.45" <br />1 2 <br />Moment <br />Shear <br />Deflection <br />13.5' <br />Page 36 of 57 <br />1834 W Third St & <br />#2,33/21/2025