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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 : 5 - CLG @ W.I.C <br />Loads(Downward+) <br />Beam Weight 6.2 plf from 0 ft to 6.5 ft <br />Roof Rafter: (14+20)(4) = (DL=56PLF; LLr=80PLF) form 0 to 6.5 <br />Ceiling Joist DL: (4)(4.8) = (DL=19PLF) form 0 to 6.5 <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 524/524 0 <br />2 524/524 0 <br />USE 4 x 8 <br />Critcal Shear = 523 LB @0' 1.5xV/(F'v x A)= 0.13 <br />F'v = 225, A = 25.38 <br />Critcal Moment = 851 LB-FT @3.25' M/(F'b x S)= 0.22 <br />F'b = 1462, S = 30.66 <br /> Critical Deflection for TL = -0.036 INCH @ 3.25 L/240 = 0.325" <br /> Critical Deflection for LL = -0.018 INCH @ 3.25 L/360 = 0.217" <br />1 2 <br />Moment <br />Shear <br />Deflection <br />6.5' <br />BEAM : 6 - CLG @ BEDROOM <br />Loads(Downward+) <br />Beam Weight 6.2 plf from 0 ft to 5.25 ft <br />Roof Rafter: (14+20)(9.2) = (DL=129.5PLF; LLr=185PLF) form 0 to 5.25 <br />Ceiling Joist DL: (4)(8.8) = (DL=35PLF) form 0 to 5.25 <br />Reactions (D+Lr+L/Max. Load comb.) <br />Bearing Down Up <br />1 934/934 0 <br />2 934/934 0 <br />USE 4 x 8 <br />Critcal Shear = 933 LB @0' 1.5xV/(F'v x A)= 0.24 <br />F'v = 225, A = 25.38 <br />Critcal Moment = 1222 LB-FT @2.5' M/(F'b x S)= 0.32 <br />F'b = 1462, S = 30.66 <br /> Critical Deflection for TL = -0.034 INCH @ 2.5 L/240 = 0.262" <br /> Critical Deflection for LL = -0.018 INCH @ 2.5 L/360 = 0.175" <br />1 2 <br />Moment <br />Shear <br />Deflection <br />5.25' <br />21 of 26