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WEST <br />COAST <br />S TRUCTURAL <br />ENGINEERING, INC. <br />9540 Semiahmoo Parkway (425) 347-8998 <br />#137 wcse.net <br />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)) SpS = (2/3)Fa SS = 0,83 <br />S1 : 0.40 ( mapped spectral accel. 1-sec. period) F, : 1.6 ( TABLE 1613.5.3(2)) Sol = (2/3)F S1 = 0,43 <br />Seismic Base Shear - ASCE 7-0512.8 Equivalent Lateral Force Procedure V = Cs W = 0.128 W <br />C., — S Cs = 0.128 <br />(R)CS need not exceed: CS shall not be less than: <br />C= S .for T < T, Cs = 0.256 CS = O>_ .�S <br />,. , for S, 0.6g CS = 0.000 N/A <br />TCI� C ) <br />C., _ SD TL f V T > TI. CS = 0.000 N/A CS = 0.010 <br />T 2(R) <br />CS MAX: 0.128 CS MIN: 0.010 <br />hn : 30 ft Ct : 0.02 x : 0.75 T = C, 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 />I = 1.0 <br />Calculating Structures Contributing Seismic Weights: <br />Description <br />Area <br />psf <br />W. (k) <br />Roof <br />1624 <br />_ 1624 <br />15 <br />24.4 <br />2nd Floor Walls <br />( 3 (40) + 3 (32) ) 8 <br />= 1728 <br />10 <br />17.3 <br />2nd Floor <br />1320 <br />= 1320 <br />10 <br />13.2 <br />1st Floor Walls <br />( 3 (40) + 2.5 (36) ) 1/2 (8) <br />= 840 <br />10 <br />8.4 <br />Using allowable stress design load combinations <br />V = 0.7 x 0.128 x 63.2 = 5.68 kips <br />Total W = 63.2 <br />Project: W4861 Sheet No: 8 9/13/2023 <br />