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Check Top Chord of Existing Truss <br />Oct. 31, 2022 14:44 <br />Design Check Calculation Sheet <br />WoodWorks Sizer 2019 (Update 4) <br />Loads: <br />Load Type Distribution Pat- Location [ft] Magnitude Unit <br /> tern Start End Start End <br />Roof-DL Dead Full Area No 10.00(24.0") psf <br />Roof-LLR Roof constr. Full Area Yes 20.00(24.0") psf <br />PV1 Dead Point No 0.50 32 lbs <br />PV2 Dead Point No 5.50 32 lbs <br />PV3 Dead Point No 7.00 32 lbs <br />PV4 Dead Point No 12.00 32 lbs <br />Self-weight Dead Full UDL No 1.2 plf <br />Maximum Reactions (lbs) and Bearing Lengths (in) : <br />1.5' 8.5' <br />16.32' <br />15.5' <br />Unfactored: <br /> Dead 148 255 71 <br /> Roof Live 191 343 126 <br />Factored: <br /> Total 340 599 198 <br />Bearing: <br /> Length 0.50* 0.51 0.50* <br /> Min req'd 0.50* 0.51** 0.50* <br />*Minimum bearing length setting used: 1/2" for end supports and 1/2" for interior supports <br />**Minimum bearing length governed by the required width of the supporting member. <br /> Lumber-soft, D.Fir-L, No.2, 2x4 (1-1/2"x3-1/2") <br />Supports: All - Timber-soft Beam, D.Fir-L No.2 <br />Roof joist spaced at 24.0" c/c; Total length: 16.44'; Clear span(horz): 1.5', 6.938', 6.938'; Volume = 0.6 cu.ft.; Slope: 18.0 deg <br />Lateral support: top = continuous, bottom = at all supports; Repetitive factor: applied where permitted (refer to online help); <br />This section PASSES the design code check. <br />Analysis vs. Allowable Stress and Deflection using NDS 2018 : <br /> Criterion Analysis Value Design Value Unit Analysis/Design <br /> Shear fv = 80 Fv' = 225 psi fv/Fv' = 0.36 <br /> Bending(+) fb = 1162 Fb' = 1941 psi fb/Fb' = 0.60 <br /> Bending(-) fb = 1673 Fb' = 1824 psi fb/Fb' = 0.92 <br />Deflection: <br /> Interior Dead 0.08 = < L/999 <br /> Live 0.20 = L/434 0.37 = L/240 in 0.55 <br /> Total 0.29 = L/306 0.49 = L/180 in 0.59 <br /> Cantil. Dead -0.03 = L/585 <br /> Live -0.14 = L/132 0.16 = L/120 in 0.91 <br /> Total -0.18 = L/107 0.21 = L/90 in 0.84 <br />2229 S Laura Linda <br />Ln12/21/22