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19011 Wood-Sno Road NE,Suite 100 <br /> Woodinville,WA 98072-4436 <br /> IR rr 1-1 Phone:425-814-9448 <br /> Fax:425-821-2120 <br /> £NG11NEEERIIti G <br /> Pacific Ridge Homes Revision Date: 1/11/2021 <br /> Thelon i Elevations A & B f <br /> Redundancy, p i.o a (Section 12.3.4) <br /> Desi n Base Shear <br /> SMS = F$SS (Eq. 11.4-1) SM, = F„S, (Eq. 11.4-2) <br /> = 1.60 = 0.90 <br /> S DS = 2/1 SMS (Eq. 11.4-3) S D 1 = a/S M, (Eq. 11.4-4) <br /> = 1.20 = 0.60 <br /> Seismic Design Category: Structure Period and Weight: <br /> Short Period— D <br /> 1Second 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 /> 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 = (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 T < TL CS = Rl for T> TL Cs = T2�Rl <br /> T\Ie/ e <br /> CS = 0.43 CS = 11.78 <br /> CS = 0.43 Ts 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 l e >_0.01 (Eq. 12.8-5) <br /> CS = 0.05 <br /> nor where S, -e 0.6g: <br /> CS = 0.5S,/(R/1B) (Eq. 12.8-6) <br /> CS = 0.00 <br /> CS = 0.18 <br /> V= 0.18 W Date:4/6/2022 <br /> Page: L1.3 <br />