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ASCE 7-16 Seismic Base Shear <br />LIC# : KW-06014368, Build:20.24.06.04 Core Structure, inc.(c) ENERCALC INC 1983-2023 <br />DESCRIPTION:Seismic Base Shear Analysis <br />Core Structure, Inc. <br />23172 Plaza Pointe Drive <br />Suite 145 <br />Laguna Hills, CA 92653 <br />925-270-0755 <br />Project File: 23033.ec6 <br />Project Title:TOM'S JR <br />Engineer:A.T. <br />Project ID:23033 <br />Project Descr: <br />" Cs " Response Coefficient ASCE 7-16 Section 12.8.1.1 <br />S : Short Period Design Spectral Response 0.850 <br />" R " : Response Modification Factor 1.25 <br />" I " : Seismic Importance Factor =1 <br />0.680From Eq. 12.8-2, Preliminary Cs = <br />4.627From Eq. 12.8-3 & 12.8-4 , Cs need not exceed = <br />From Eq. 12.8-5 & 12.8-6, Cs not be less than =0.037 <br />DS <br />=Cs : Seismic Response Coefficient =0.6800User has selected ASCE 12.8.1.3 : Regular structure, <br />Less than 5 Stories and with T <<= 0.5 sec, SO Ss <= 1.5 for Cs calculation <br />= <br />= <br />Seismic Base Shear ASCE 7-16 Section 12.8.1 <br />W ( see Sum Wi below ) =2.76 kCs =0.6800 from 12.8.1.1 <br />Seismic Base Shear V = Cs * W =1.88 k <br />Vertical Distribution of Seismic Forces ASCE 7-16 Section 12.8.3 <br />" k " : hx exponent based on Ta =1.00 <br />Table of building Weights by Floor Level... <br />Wi : Weight Hi : Height (Wi * Hi^k)Cvx Fx=Cvx * V Sum Story Shear Sum Story MomentLevel # <br />1 2.76 8.25 22.77 1.0000 1.88 1.88 0.00 <br />Sum Wi =2.76 k Total Base Shear =1.88 k <br />Base Moment = <br />22.77 k-ftSum Wi * Hi = <br />15.5 k-ft <br />Diaphragm Forces : Seismic Design Category "B" to "F"ASCE 7-16 12.10.1.1 <br />Level #Wi Fi Fpx : MaxFpx : CalcdSum Fi Sum Wi Fpx Dsgn. ForceFpx : Min <br />1 2.76 1.88 1.88 2.76 1.88 0.47 0.94 0.94 1.88 <br />Wpx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Weight at level of diaphragm and other structure elements attached to it. <br />Fi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Design Lateral Force applied at the level. <br />Sum Fi . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Sum of "Lat. Force" of current level plus all levels above <br />0.20 * S * I * WpxMIN Req'd Force @ Level . . . . . . . . . .DS <br />DSMAX Req'd Force @ Level . . . . . . . . . .0.40 * S * I * Wpx <br />Fpx : Design Force @ Level . . . . . . . . . .Wpx * SUM(x->n) Fi / SUM(x->n) wi, x = Current level, n = Top Level <br />14 <br />1430 E Edinger Ave <br />3/27/2025