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1299 Columbia Ave, E-7 <br />Riverside, CA 92507 <br />(951) 788-2050 <br />(951) 788-2075 Fax <br />EW-Webb Engineering, Inc. <br />Page 8 of 11 <br />2019 <br />2024-129 <br />Fernandez, Joseph, Remodel, Santa Ana, Gabriel <br />30-Jan-25 <br />1820 17th St <br />Santas Ana <br />SEISMIC: <br />---------------------------------------------------------------------- <br />R = 6.5 <br />I = 1.0 <br />p(redundancy) = 1.30 <br />Risk Category = II <br />Ss = 1.307 S1 = 0.466 <br />SMs= 1.568 SM1= 0.885 <br />SDs= 1.045 SD1= 0.590 <br />Fa = 1.200 Fv = 1.900 <br />Seismic Design Category= D <br />Ta = Ct*hmax^X = 0.02*8.5^0.75 = 0.10 <br />Ts = SD1/SDs = 0.59/1.05 = 0.56 <br />1.5Ts = 0.68 <br />Tl = 8.00 <br />Cs = SDs/(R/I) = 0.161 AISC-7 12.8-2 <br />T <= Tl <br />Cs need not exceed SD1/(Ta(R/I)) = 0.912 AISC-7 12.8-3 <br />Cs = 0.161 <br /> Cs not less than 0.044Sds*I >= 0.01 AISC-7 12.8-5 <br /> CsMin = 0.044 x Sds*I = 0.046 <br />Cs = 0.161 <br />T <= 1.5 Ts therefore: <br />Cs = SDs/(R/I) = 0.161 AISC-7 12.8-2 <br />Cs = 0.161 <br />V = Cs p W = 0.209 W <br />Transform V for working stress design; divide by 1.4 <br />V = 0.149 W <br />Vertical Distribution of Base Shear <br />k = 1.0 for exponent in ASCE 7 12.8-12 <br />Group Section hx Wx wxhx^k Cvx Fx Fx/wx <br />0 1 8.500 49026.990 416729.400 .559 49026.986 1.000 <br />0 2 8.500 38687.920 328847.336 .441 38687.920 1.000 <br />Totals 87714.910 745576.736 87714.906 <br />Total Weight/Mass = 87714.910lbs <br />Total Base Shear = 13094.582lbs <br />SEC- ROOF FLOOR LUMPED <br />TION DIAPHRAGM +DIAPHRAGM +EXTERIOR WALLS +INTERIOR WALLS +MASS <br /> at 12.78psf at 0.psf at 14.96psf at 7.46psf <br />1L 43.5ft-depth 0.ft-depth 165ft x 4.3ft-ht/57.ft 216ft x 4.3ft-ht/57.ft <br />1L MASS = 860.12 plf; SEISMIC FORCE = 128.4plf <br />1T 57.ft-depth 0.ft-depth 165ft x 4.3ft-ht/43.5ft 216ft x 4.3ft-ht/43.5ft <br />1T MASS = 1127.06 plf; SEISMIC FORCE = 168.25plf <br />2L 51.ft-depth 0.ft-depth 154ft x 4.3ft-ht/42.ft 48ft x 4.3ft-ht/42.ft <br />2L MASS = 921.14 plf; SEISMIC FORCE = 137.51plf <br />2T 42.ft-depth 0.ft-depth 154ft x 4.3ft-ht/51.ft 48ft x 4.3ft-ht/51.ft <br />2T MASS = 758.59 plf; SEISMIC FORCE = 113.25plf