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Eco, Structural Calculations, <br /> 2/23/2023, Pg. 7 of 25 <br /> Seismic Analysis <br /> Address: 215 110TH PLACE SE Date: 2/23/2023 S/W User: P. Finfrock 1-:2 <br /> Calculation of Seismic Loads ASCE 7-16 12.14.8 Simplified Lateral Force Analysis Procedure: <br /> An equivalent lateral force analysis shall consist of the application of equivalent static lateral forces to a linear mathematical <br /> model of the structure.The lateral forces applied in each direction shall sum to a total seismic base shear given by Section <br /> 12.14.8.1 and shall be distributed vertically in accordance with Section 12.14.8.2. For the purpose of analysis,the structure <br /> shall be considered fixed at the base. <br /> Inputs Calculations <br /> Seismic Category D Fa,Acceleration-based Site Coefficient 1.2 <br /> Number of Stories One Story F,Structure Height Coefficient 1 <br /> Risk Category II R,Response Modification Coefficient 6.5 <br /> Structure Type Light-Frame Wood-Sheathed Walls S DS,Seismic Design Parameter 1.105 g <br /> Soil Type Stiff Soil,D(typical) Seismic Snow Load* 0 psf <br /> Base Snow Load* 25 psf <br /> Ss** 1.382 g <br /> F*sDs*W <br /> V = R (ASCE 7—16,12.14—11) <br /> *Snow load required to be in seismic calculation if snow load is>30 psf.Snow load analysis for Washington,2nd ed.by <br /> Structural Engineers Association of Washington recommends using 25%of base snow load to be used in seismic calculations <br /> due to statistical probability theory. <br /> Dead Loads of roof and upper portion of walls Roof Sesmic Loads <br /> Load Source Load (psf) L(ft) W(ft) A(sq ft) DL(Ibs) lRoof Weight,Wr 73600 Ibs <br /> Roof 12 4000 48000 IRoof Shear,Vr 12512 Ibs <br /> Exterior Walls 12 260 5 1300 15600 <br /> Interior Walls 10 200 5 1000 10000 <br /> Comparison of Wind and Seismic Forces <br /> Direction North/South East/West <br /> Wind tributary length,ft 76 55 <br /> Wind tributary height,ft 15 15 Therefore,Wind loads govern lateral analysis <br /> Wind tributary area,sq ft 1140 825 for North/South resisting walls. <br /> Wind Pressure,psf 16.00 16.00 <br /> Design wind load,lb 18240 13200 Furthermore,Wind loads govern lateral analysis <br /> Design seismic Load,lb 12512 12512 for East/West resisting walls. <br /> Governed by: Wind Wind <br />