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19011 Woad-Sno Road NE,Suite 100 <br /> Woodinville,WA 98072-4436 <br /> Phone:425-814-9448 <br /> Fax:425-821-2120 <br /> C 3'?CI[`IEERit`w C <br /> Pacific Ridge Homes Revision Date: 1/11/2021 <br /> Hudson (Elevations A & B) <br /> Redundancy,p 1.0 (Section 12.3.4) <br /> Demon Base Shear <br /> Sus = F.S$ (Eq. 11.4-1) Sfdt = FvSi (Eq. 11.4-2) <br /> = 1.80 = 0.90 <br /> S os = 2%S Ms (Eq. 11.4-3) S o i = %S M i (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 C, = 0.020 Table 12.8-2 <br /> x = 0.75 <br /> Building Height(Mean Roof), h„ = 23 ft <br /> Approximate Fundamental Period, T. = Ct (h„)K (Eq. 12.8-7) <br />! T = T8 = 0.21 <br /> TL = 6 (Figs. 22-14 thru 22-17) <br /> Calculated design base shear: <br /> K V= C, W (Eq. 12.8-1) <br /> i <br /> SDS <br /> C 8 - JRl (Eq. 12.8-2) <br /> je <br /> Cs = 0.18 <br /> The total design base shear need not exceed: <br /> (Eq. 12.8-3) (Eq. 12.8at} <br /> SDI sD7TL <br /> for T < TL C6 for T> TL CS = ll <br /> T(T'/ TAR! <br /> CS = 0.44 Cs = 12.38 <br /> CS = 0.44 T5TL. <br /> CS = 0.65 1.5 times Cs in accordance with 11.4,8 <br /> The iota/design base shear shall not he less than: <br /> CS = 0.044SDs1, >_0.01 (Eq. 12.8-5) <br /> CS = 0.05 <br /> nor where S, ' 0.6g: <br /> CS = 0.5S1/(R/la) (Eq. 12.8-6) <br /> CS = 0.00 <br /> CS = 0.18 <br /> V= 0.18 W Date:6/20/2022 <br /> Page: L1.3 <br />