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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 : C1 - C.J. 2X6 DFL#2 @ 16" O.C. <br />Loads(Downward+) <br />Ceiling Joist: (4+10)(1.3) = (DL=5.3PLF; LLr=13.4PLF) form 0 to 15.25 <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 143/143 0 <br />2 143/143 0 <br />USE 2 x 6 <br />Critcal Shear = 142 LB @0' 1.5xV/(F'v x A)= 0.11 <br />F'v = 225, A = 8.25 <br />Critcal Moment = 543 LB-FT @7.62' M/(F'b x S)= 0.51 <br />F'b = 1682, S = 7.56 <br /> Critical Deflection for TL = -0.684 INCH @ 7.63 L/240 = 0.762" <br /> Critical Deflection for LL = -0.488 INCH @ 7.63 L/360 = 0.508" <br />1 2 <br />Moment <br />Shear <br />Deflection <br />15.25' <br />BEAM : C2 - C.J. 2X8 DFL#2 @ 16" O.C. @ KITCHEN <br />Loads(Downward+) <br />Ceiling Joist DL: (4)(1.3) = (DL=5.3PLF) form 0 to 16 <br />Point load @ 6ft ( D=121 Lr=174 )(P1) <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 227/227 0 <br />2 153/153 0 <br />USE 2 x 8 <br />Critcal Shear = 227 LB @0' 1.5xV/(F'v x A)= 0.14 <br />F'v = 225, A = 10.88 <br />Critcal Moment = 1266 LB-FT @6' M/(F'b x S)= 0.74 <br />F'b = 1552, S = 13.14 <br /> Critical Deflection for TL = -0.629 INCH @ 7.43 L/240 = 0.8" <br /> Critical Deflection for LL = -0.31 INCH @ 7.43 L/360 = 0.533" <br />1 2 <br />P1 <br />Moment <br />Shear <br />Deflection <br />16' <br />23 of 32