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Project: <br />Location: <br />Calc. by: <br />Date: <br />MEMBER CHECKS (ROOF 1 to 3) PASS <br />1. (E) WOOD ROOF CONSTRUCTION: <br />ROOF SLOPE = 20° <br />FRAMING TYPE = Rafters <br />WOOD SPECIES & GRADE = DF #2 <br />RAFTER OR TRUSS TOP CHORD SIZE = 2x4 (S =3.06 in^3 ; I = 5.35 in^4) <br />RAFTER OR TRUSS SPACING = 24" o.c. <br />MEMBER HORIZONTAL SPAN, L = 10'-0"10 <br />2. MEMBER LOADING: <br />GOVERNING LOAD CASE = <br />TOTAL LOAD, WTL = <br />3. BENDING CHECKS: <br />REFERENCE DESIGN BENDING STRESS, F b = 900 psi <br />LOAD DURATION FACTOR, Cd =0.90 <br />SIZE FACTOR, CF =1.50 <br />REPETITIVE MEMBER FACTOR, Cr =1.15 <br />ALLOWABLE BENDING STRESS, F' b = Fb x Cd x Cf x Cr =1,397 psi <br />MEMBER BENDING STRESS, f b = Mmax / S =1,251 psi <br />BENDING DEMAND-CAPACITY RATIO = f b / F'b =90% < 100%BENDING O.K. <br />4. SHEAR CHECKS: <br />REFERENCE DESIGN SHEAR STRESS, F v = 180 psi <br />LOAD DURATION FACTOR, Cd =0.90 <br />ALLOWABLE SHEAR STRESS, F' v = Fv x Cd =162 psi <br />MAX SHEAR, Vmax = WTL.L / 2 =128 lbs <br />MEMBER AREA, A =5.25 in2 <br />MEMBER SHEAR STRESS, fv = Vmax / A =24.3 psi <br />SHEAR DEMAND-CAPACITY RATIO = fv / F' v = 15% < 100%SHEAR O.K. <br />5. DEFLECTION CHECKS: <br />ALLOWABLE DEFLECTION (TOTAL LOAD), D ALL-TL = (L/120) E = <br />= 1.000 in SPAN TYPE = <br />MAX DEFLECTION (TOTAL LOAD), D MAX-TL = 5 WL^4/384EI <br />= 0.670 in (L/179) <br />DMAX-TL < DALL-LL TOTAL LOAD DEFLECTION O.K. <br /> * RLL = 0 PSF UNDER PV <br />1,600,000 psi <br />Simple Span <br />DL + PV <br />26 plf <br />ROOF SNOW LOAD 0.0 0.0 0.0 <br />ROOF DEAD LOAD <br />ROOF LIVE LOAD*0.0 0.0 0.0 <br />9.0 9.6 19.2 <br />PV DEAD LOAD 3.0 3.2 6.4 <br />LOAD TYPE UNIFORM LOAD <br />(PSF) <br />U.L. PROJECTION <br />OVER HORIZ. SPAN (PSF) <br />MEMBER DESIGN <br />LOAD (PLF) <br />PE <br />28202 CABOT ROAD, SUITE 300 <br />LAGUNA NIGUEL, CA 92677 <br />11/12/2021 <br />Minnis Residence <br />Santa Ana, CA <br />LAGUNA <br />CONSULTING ENGINEERS <br />LAGUNA PACIFIC GROUP, INC. <br />Page 4 <br />2401 N Hathaway <br />08/17/22