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Conterminous 48 States <br /> 2003 NEHRP Seismic Design Provisions <br /> Latitude = 47.933 <br /> Longitude = -122.2561 <br /> Spectral Response Accelerations Ss and S1 <br /> Ss and S1 = Mapped Spectral Acceleration Values <br /> Site Class B - Fa = 1.0 ,Fv = 1.0 <br /> Data are based on a 0.05 deg grid spacing <br /> Period Sa <br /> (sec) (g) <br /> 0.2 1.244 (Ss, Site Class B) <br /> 1.0 0.442 (S1, Site Class B) <br /> Conterminous 48 States • <br /> 2003 NEHRP Seismic Design Provisions <br /> Latitude = 47.933 <br /> Longitude = -122.2561 <br /> Spectral Response Accelerations SMs and SM1 <br /> SMs = Fa x Ss and SM1 = Fv x S1 <br /> Site Class D - Fa = 1.002 ,Fv = 1.558 <br /> Period Sa <br /> (sec) (g) <br /> 0.2 1.247 (SMs, Site Class D) <br /> 1.0 0.689 (SM1, Site Class D) <br /> IBC 2009 LOADING <br /> SEISMIC: ss= 124.4 % g <br /> Sl= 44.2 % g <br /> Soil Clas: D <br /> Modified Design spectral response paramete <br /> Sms= 124.7 % g Sds= 83.1 % g <br /> Sml= 68.9 % g Shc= 45. 9 % g <br /> Seismic Use Group 2 <br /> Seismic Design Category D <br /> or D <br /> Ie = 1 <br /> R = 3.5 R = 3.25 <br /> Cs = 0.238 W Cs = 0.256 W • <br /> Using Working Stress Design <br /> V = Cs*W/1.4 <br /> V = 0.170 W V = 0. 183 W <br />