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WEST <br /> COAST ,i f 9540 Semiahmoo Parkway (425)347-8998 <br /> STRUCTURAL' <br /> -- - �. #137 wcse.net <br /> ENGINEERING,INC. Blaine,WA 98230 <br /> LATERAL ANALYSIS <br /> Site Class: D <br /> SS : 1.25 (mapped spectral accel.Short period) Fa : 1.0 (TABLE 1613.5.3(1)) Sips = (2/3)Fa SS = 0.83 <br /> S, : 0.40 (mapped spectral accel. 1-sec.period) Fv : 1.6 (TABLE 1613.5.3(2)) So, = (2/3)F,Si = 0.43 <br /> Seismic Base Shear- ASCE 7-05 12.8 Equivalent Lateral Force Procedure V = Cs W = 0.128 W <br /> C, = SD, <br /> Cs= 0.128 <br /> \.. ..I <br /> Cs need not exceed: Cs shall not be less than: <br /> Cs = SD'R\ for T < Tr_ CS= 0.256 Cs = O. 5, for S, >_ 0.6g Cs= 0.000 N/A <br /> T _ <br /> I) \ I <br /> C, = St)1 \ for T > TL, Cs = 0.000 N/A Cs = 0.010 <br /> T- .._._. <br /> CS MAX: 0.128 CS MIN: 0.010 <br /> h, : 30 ft Ct : 0.02 x : 0.75 T = CI hx x= 0.26 sec. = 3.9 Hz <br /> Non flexible building ASCE7-05 6.2 TL= 6.0 sec. <br /> R = 6.5 Light-framed walls sheated with wood structural panels <br /> 1 = 1.0 <br /> Calculating Structures Contributing Seismic Weights: <br /> Description Area psf W. (k) <br /> Roof 1624 = 1624 15 24.4 <br /> 2nd Floor Walls ( 3 (40) + 3 (32) ) 8 = 1728 10 17.3 <br /> 2nd Floor 1320 = 1320 10 13.2 <br /> 1st Floor Walls ( 3 (40) + 2.5 (36) ) 1/2 (8) = 840 10 8.4 <br /> Using allowable stress design load combinations Total W = 63.2 <br /> V = 0.7 x 0.128 x 63.2 = 5.68 kips <br /> Project: W4861 Sheet No: 8 9/13/2023 <br />