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19011 Wood-Sao Road NE,Suite 100 <br /> F <br /> Woodinville,WA 98072-4436 <br /> Phone:425-814-8448 <br /> E N GI N EE RI1ti G FaJc 425-$21-2120 <br /> Pacific Ridge Homes Revision Date: 1/11/2021 <br /> Lennon (Elevations A & B) <br /> Redundancy,p in a (Section 12.3.4) <br /> Desian Base Shear <br /> S MS = F m S s (Eq. 11.4-1) S M 1 = F„S 1 (Eq- 11.4-2) <br /> = 1.80 = 0.90 <br /> SDS = z3 SMS (Eq. 11.4-3) SD 1= %SM 1 (Eq. 11.4-4) <br /> = 1.20 = 0.60 <br /> Seismic Design Category: Structure Period and Weight: <br /> Short Period— D <br /> 1-Second Period-- D Ct = 0.020 Table 12.8-2 <br /> x = 0.75 <br /> Building Height(Mean Roof),h„ = 24 ft <br /> Approximate Fundamental Period, Te = Ct (h„)" (Eq. 12.8-7) <br /> T= Ta = 0.22 <br /> T L = 6 (Figs_ 22-14 thru 22-17) <br /> Calculated design base shear. <br /> V= C3 W (Eq. 12.8-1) <br /> SDS <br /> Cs = (TR <br /> ) (Eq. 12.8-2) <br /> CS = 0.18 <br /> The total design base shear need not exceed: <br /> (Eq. 12.8-3) (Eq. 12.84) <br /> SDI SDiTL <br /> for TsTL C41 = forT> Tj_ Cs = TZ ITLT(TR <br /> � (LI.) <br /> CS = 0.43 Cs = 11.78 <br /> Cs = 0.43 T5TL <br /> C s = 0.64 1.5 times Cs in accordance with 11.4.8 <br /> The total design base shear shall not be less than: <br /> CS = 0.044S Ds 1, ?0.01 (Eq.12.8-5) <br /> CS = 0.05 <br /> nor where S 1 >_ 0.6g: <br /> CS = 0.5S,1(R/le) (Eq. 12.8-6) <br /> CS = 0.00 <br /> Cs = 0.18 <br /> V= 0.18 W Date: 3/31/2022 <br /> Page: L1.3 <br />