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�-, 19011 Wood-Sno Road NE,Suite 100 <br /> Li Woodinville,WA 98072-4436 <br /> Phone:425-814-8448 <br /> ENGINEERING Fax:425-821-2120 <br /> Pacific Ridge Homes Revision Date: 1/11/2021 <br /> Thelon Elevations A & B <br /> Redundancy, p 1.0 • (Section 12.3.4) <br /> Design Base Shear <br /> S Ms = F a S s (Eq. 11.4-1) S M I = F„S 1 (Eq. 11.4-2) <br /> = 1.80 = 0.90 <br /> SOS = %S Ms (Eq. 11.4-3) So 1 = %S M 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, To = C t (ha)" (Eq. 12.8-7) <br /> T= TB = 0.22 <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 = RI (Eq. 12.8-2) <br /> Ie <br /> CS = 0.18 <br /> The total design base shear need not exceed: <br /> (Eq. 12.8-3) (Eq. 12.8-4) <br /> SD1 SD1Ti <br /> for T TL CS = /R\ for T> TL CS = T (f-) <br /> T(\ ) ze <br /> CS = 0.43 Cs = 11.78 <br /> C S = 0.43 T s TL <br /> CS = 0.64 1.5 times Cs in accordance with 11.4.8 <br /> The total design base shear shall not be less than: <br /> C S = 0.044S Ds/e >_0.01 (Eq. 12.8-5) <br /> Cs = 0.05 <br /> • nor where S i >_ 0.6g: <br /> Cs = 0.5S1/(R/Ie) (Eq. 12.8-6) <br /> C5 = 0.00 <br /> CS = 0.18 <br /> V= 0.18W Date:4/6/2022 <br /> Page: L1.3 <br />