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901 91ST PL SW 2025-08-07
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901 91ST PL SW 2025-08-07
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Last modified
8/7/2025 7:21:21 AM
Creation date
6/3/2025 11:35:38 AM
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Address Document
Street Name
91ST PL SW
Street Number
901
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2 <br /> Project:901 91 st PI SW, Everett, WA 98204 <br /> 1.1 Seismic Design <br /> Criteria Basic Seismic-Force-Resisting System Diaphragms/Shear Walls <br /> Medium Building Height H = 20 ft <br /> Seimic Use Group II <br /> Importance Factor le = 1.0 <br /> Site Class D <br /> Seismic Design Category D <br /> Response Factor R = 6.5 (light frame wood building) <br /> Mapped Acceleration Ss = 1.55 <br /> S1 = 0.55 <br /> Design Acceleration SDs = 1.09 <br /> SD1 = NA <br /> Seismic Response Coefficient Cs = SDs/ (R/1) <br /> 1.09/(6.5/1.0) = 0.17 <br /> Building Weight <br /> The weight of the walls is applied by adding 5 psf to the roof DL and 10 psf to the floor DL . <br /> 2nd level W = (15 + 5) x 1,500 sgft = 30,000 Ibs <br /> 1 st level W = (20 + 10) x 1,500 sqft = 45,000 Ibs <br /> Total Building Weight W = 75,000 Ibs <br /> Base Shear VBase = Cs x W = 0.17 x 75,000 = 12,750 Ibs <br /> Design Shear: To convert from strength level to ASD, Base Shear is multiplied by 0.7 <br /> VDesign = 0.7 x 12,750 = 9,000 Ibs <br /> Vertical Distribution: FX = Cvx x V = Cvx x 9,000 <br /> Cvx = (wx x hxk) / (wi x hik) with k= 1.0 for T< 0.5 sec <br /> Level wX hX wxhx wxhx/lwihi FX per Grid <br /> (Ibs) (ft) (lb-ft) N (Ibs) (Ibs) <br /> 2nd 30,000 17 510,000 60 5,400 2,700 <br /> 1st 45,000 8 360,000 40 3,600 1,800 <br /> 75,000 --- 870,000 100 9,000 <br /> tecinstruct LLC <br />
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