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PROJECT NAME: HULTS RESIDENCE ADDITION <br /> JOB: X10-2854 <br /> 1.2 SEISMIC DESIGN <br /> Maximum considered earthquake spectral response accelerations <br /> Given position: <br /> Lat = 47.950, Long = -122.200 <br /> Short period, Ss = 135.7 % of g <br /> 1 second period, S 1 = 51.5 % of g <br /> Site class and adjusted maximum spectral accelerations: <br /> Site class = D <br /> For Site Class = D, Site coefficient, F. = 1.20 Par 11.4.4 <br /> Site coefficient, F, = 1.78 Table 11.4-2 - Interpolated <br /> The adjusted maximum spectral response per §11.4.3 <br /> S Nis = Fa Ss 1.20 (1.36) = 1. 63g Eq 11.4-1 <br /> S Nu. = FS 1 = 1.78 (0.52) = 0.92g Eq 11.4-2 <br /> Design spectral accelerations parameters: <br /> S Ds = 2/3S Nis = 2/3 (1 .63g) = 1.09g Eq 11.4-3 <br /> S Dl = 2/3S mi = 2/3 (0.92g) = 0.61g Eq 11.4-4 <br /> Building Risk Category and importance factors: <br /> Category = II (per Table 1.5-1) <br /> Category = I (as defined per Table 1.5-1) <br /> Importance factor, /e = 1.00 <br /> Seismic Design Category(SDC) <br /> Table 11. 6-1, Pg 85 <br /> For S Ds = 108.54g, SDC = D <br /> Table 11.6-2, Pg 85 <br /> For S D1 61.30g, SDC = D <br /> SDC D controls. <br /> Building system <br /> 15. Light-frame (wood) walls sheathed with wood structural panels rated for shear <br /> resistance or stee <br /> R = 6.5 (Table 12.2-1) <br /> 1-20 = 3.0 (2.5 for flexible diaphragm - Note 9) <br /> Cd = 4.0 <br /> Building element weights <br /> Level 2, Roof weight = 15.0 psf <br /> CUSTOM DESIGN & ENGINEERING, INC. <br /> March 3, 2022 Page 8 /67 <br /> Copyright©2022 Custom Design&Engineering,Inc.All rights reserved. <br />