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19011 Wood-Sno Road NE,Suite 100 <br /> Woodinville,WA 98072-4436 <br /> Phone:425-814-8448 <br /> ENGINEERIPti G Fax:425-821-2120 <br /> Pacific Ridge Homes Revision Date: 1/11/2021 <br /> Hudson (Elevations A & B) <br /> Redundancy, p (Section 12.3.4) <br /> Design Base Shear <br /> SMs = F,S s (Eq. 11.4-1) S M, = F„S j (Eq. 11.4-2) <br /> = 1.80 = 0.90 <br /> S Ds = % S Ms (Eq. 11.4-3) S D j = z3 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 Cr = 0.020 Table 12.8-2 <br /> x = 0.75 <br /> Building Height(Mean Roof), h„ = 23 ft <br /> Approximate Fundamental Period, Ta = Ct (h„)" (Eq. 12.8-7) <br /> T= T, = 0.21 <br /> TL = 6 (Figs. 22-14 thru 22-17) <br /> Calculated design base shear.- <br /> V= CS W (Eq. 12.8-1) <br /> SDS <br /> CS = (R (Eq. 12.8-2) <br /> je f <br /> CS = 0.18 <br /> The total design base shear need not exceed: <br /> (Eq. 12.8-3) (Eq. 12.84) <br /> for T < TL CS = SD1 SD1TL <br /> (R for T > TL CS = <br /> T \Ie� Tz ��} <br /> CS = 0.44 CS = 12.38 <br /> Cs = 0.44 T<_ TL <br /> C S = 0.65 1.5 times Cs in accordance with 11.4.8 <br /> The total design base shear shall not be less than: <br /> CS = 0.044SDs 1e >_0.01 (Eq. 12.8-5) <br /> C S = 0.05 <br /> nor where S >_ 0.6g: <br /> CS = 0.5S1/(R/le) (Eq. 12.8-6) <br /> Cs = 0.00 <br /> CS = 0.18 <br /> V= 0.18W <br /> Date: 6/20/2022 <br /> Page: L1.3 <br />