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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 : 1 - CLG @ LIVING ROOM <br />Loads(Downward+) <br />Beam Weight 35 plf from 0 ft to 30.75 ft <br />Roof Rafter: (14+20)(9.5) = (DL=133PLF; LLr=190PLF) form 0 to 30.75 <br />Ceiling Joist DL: (4)(11) = (DL=44PLF) form 0 to 30.75 <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 5059/5058 0 <br />2 5059/5058 0 <br />USE 7" x 16" PSL <br />Critcal Shear = 5058 LB @0' 1.5xV/(F'v x A)= 0.18 <br />F'v = 362, A = 112 <br />Critcal Moment = 38884 LB-FT @15.37' M/(F'b x S)= 0.43 <br />F'b = 3625, S = 298.67 <br /> Critical Deflection for TL = -1.385 INCH @ 15.37 L/240 = 1.538" <br /> Critical Deflection for LL = -0.492 INCH @ 15.37 L/360 = 1.025" <br />1 2 <br />Moment <br />Shear <br />Deflection <br />30.75' <br />BEAM : 2 - CLG @ BEDROOM <br />Loads(Downward+) <br />Beam Weight 12.7 plf from 0 ft to 14.75 ft <br />Roof Rafter: (14+20)(9.5) = (DL=133PLF; LLr=190PLF) form 0 to 14.75 <br />Ceiling Joist DL: (4)(11) = (DL=44PLF) form 0 to 14.75 <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 2629/2629 0 <br />2 2629/2629 0 <br />USE 6 x 10 <br />Critcal Shear = 2629 LB @0' 1.5xV/(F'v x A)= 0.35 <br />F'v = 212, A = 52.25 <br />Critcal Moment = 9696 LB-FT @7.37' M/(F'b x S)= 0.83 <br />F'b = 1688, S = 82.73 <br /> Critical Deflection for TL = -0.604 INCH @ 7.37 L/240 = 0.738" <br /> Critical Deflection for LL = -0.283 INCH @ 7.37 L/360 = 0.492" <br />1 2 <br />Moment <br />Shear <br />Deflection <br />14.75' <br />19 of 26