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Dong Engineering Inc. <br />T.I. PHO N GO <br />328 N_HARBOR BLVD, SANTA ANA, CA 92703 <br />Job #: 260166 <br />Date : 04/17/2026 <br />Plan : 1 <br />BEAM : R1 - ROOF JOIST 2X6 DFL#2 @ 16" O.C. @ <br />MECH <br />Loads(Downward+) <br />Beam Weight 2.1 plf from 0 ft to 6 ft <br />Mech Area: (18+20)(1.3) = (DL=24PLF; LLr=26.7PLF) form 0 to 6 <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 158/158 0 <br />2 158/158 0 <br />USE 2 x 6 <br />Critcal Shear = 158 LB @0' 1.5xV/(F'v x A)= 0.13 <br />F'v = 225, A = 8.25 <br />Critcal Moment = 237 LB-FT @3' M/(F'b x S)= 0.25 <br />F'b = 1462, S = 7.56 <br /> Critical Deflection for TL = -0.046 INCH @ 3 L/240 = 0.3" <br /> Critical Deflection for LL = -0.023 INCH @ 3 L/360 = 0.2" <br />1 2 <br />Moment <br />Shear <br />Deflection <br />6' <br />7 of 9