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Seismic Loads <br /> Forces due to earthquakes will be determined using Chapters 11 and 15 of the ASCE 7 per <br /> Section 1613.1 of the IBC. The site-specific parameters below are as provided from the ASCE <br /> Hazard Tool. Seismic loads are considered to act on full tanks. <br /> D assumed seismic so class <br /> le:=1.50 seismic importance factor per Section 1.5.1 <br /> SS:=1.369 mapped risk-targeted maximum considered earthquake spectral <br /> acceleration parameter at short periods per ASCE 7 Hazard Tool <br /> Fa:-1.0 short-tern site coefficient per Table 11.4-1 <br /> Sls:=a 'SS=1.369 mapped risk-targeted maximum considered earthquake <br /> spectral acceleration parameter at short periods <br /> adjusted for site class effects per Equation 11.4-1 <br /> 2 design earthquake spectral response acceleration <br /> SDS:=3 SMS=0.913 parameter at short periods per Equation 11.4-3 <br /> As permitted by ASCE 7 Section 15.7.6, the tanks may be designed to resist the seismic forces <br /> calculated as if a rigid-body system per Section 15.4.2. <br /> Vtank2°=0.30'SDS'Tgt2F'1e=99891bf seismic b.se shear per Equation 15.4-5 <br /> p:=1.0 redundancy factor per Section 12.3.4 <br /> Eh2'—p'Vtank2=9989lbf horizontal seismic load effect per Equatiou 12.4-3 <br /> Ev2:=0.2•SDS'T't2F=4440 lbf vertical seismic load effect per Equation 12.4-4a <br /> Mt2E:=Vrank2'COG2=67.2836 kip ft overturning moment on tank <br /> project 2405-0007 date 2/25/2025 <br /> PSE Peterson Structural Engineers,Inc.www.psengineers.com designer TJC sheet 15 of 46 <br /> SE <br />