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Dong Engineering Inc. <br />ADU <br />524 S.SHAWNEE DR UNIT 2, SANTA ANA, CA 92704 <br />Job #: 240168 <br />Date : 10/16/2024 <br />Plan : 1 <br />BEAM : R1 - R.R. 2X6 DFL#2 @ 16" O.C. TYP. <br />Loads(Downward+) <br />Roof Rafter: (11+20)(1.3) = (DL=14.7PLF; LLr=26.7PLF) form 0 to 12 <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 248/248 0 <br />2 248/248 0 <br />USE 2 x 6 <br />Critcal Shear = 248 LB @0' 1.5xV/(F'v x A)= 0.2 <br />F'v = 225, A = 8.25 <br />Critcal Moment = 744 LB-FT @6' M/(F'b x S)= 0.7 <br />F'b = 1682, S = 7.56 <br /> Critical Deflection for TL = -0.58 INCH @ 6 L/240 = 0.6" <br /> Critical Deflection for LL = -0.374 INCH @ 6 L/360 = 0.4" <br />1 2 <br />Moment <br />Shear <br />Deflection <br />12' <br />BEAM : R2 - R.R. 2X6 DFL#2 @ 16" O.C. TYP. <br />Loads(Downward+) <br />Beam Weight 2.1 plf from 0 ft to 11.5 ft <br />Roof Rafter: (11+20)(1.3) = (DL=14.7PLF; LLr=26.7PLF) form 0 to 11.5 <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 360/359 0 <br />2 140/141 0 <br />USE 2 x 6 <br />Critcal Shear = 207 LB @3.5' 1.5xV/(F'v x A)= 0.16 <br />F'v = 225, A = 8.25 <br />Critcal Moment = -266 LB-FT @3.5' M/(F'b x S)= 0.25 <br />F'b = 1682, S = 7.56 <br /> Critical Deflection for TL = -0.063 INCH @ 7.75 L/240 = 0.4" <br /> Critical Deflection for LL = -0.039 INCH @ 7.75 L/360 = 0.267" <br />1 2 <br />Moment <br />Shear <br />Deflection <br />3.5'8' <br />Page 20 of 21 <br />524 S Shawnee Dr & <br />Unit# 22/7/2025