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Dong Engineering Inc. <br />REMODEL & ADDITION <br />1409 MERIDAY LN, SANTA ANA, CA 92706 <br />Job #: 250344 <br />Date : 08/18/2025 <br />Plan : 1 <br />BEAM : 7 - HDR @ LIVING ROOM <br />Loads(Downward+) <br />Beam Weight 4.7 plf from 0 ft to 6.25 ft <br />Roof Rafter: (14+20)(6) = (DL=84PLF; LLr=120PLF) form 0 to 6.25 <br />Ceiling Joist DL: (4)(4.5) = (DL=18PLF) form 0 to 6.25 <br />Exterior Wall: (15)(2) = (DL=30PLF) form 0 to 6.25 <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 802/802 0 <br />2 802/802 0 <br />USE 4 x 6 <br />Critcal Shear = 802 LB @0' 1.5xV/(F'v x A)= 0.27 <br />F'v = 225, A = 19.25 <br />Critcal Moment = 1251 LB-FT @3' M/(F'b x S)= 0.58 <br />F'b = 1462, S = 17.65 <br /> Critical Deflection for TL = -0.113 INCH @ 3 L/240 = 0.312" <br /> Critical Deflection for LL = -0.053 INCH @ 3 L/360 = 0.208" <br />1 2 <br />Moment <br />Shear <br />Deflection <br />6.25' <br />BEAM : C1 - C.J. 2X6 DFL#2 @ 16" O.C. (MAX L=15'-3") <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 />22 of 26