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Seismic Loads <br /> Forces due to earthquakes will be determined using Chapters 11 and 13 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. <br /> D assumed seismic soi_ class; <br /> Ie:=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-term site coefficient per Table 11.4-1 <br /> SMS`=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--1 <br /> RP:=2.5 seismic coefficient for mechanical engines, turbines, <br /> pumps, and compressors per Table 13.6-1 <br /> a :=1 <br /> P <br /> 0.4•a •SDs'WC�E: J <br /> R =4293.9725 lbf seismic base shear per Equation 13.3-1 <br /> Ie <br /> p:=1.0 redundancy factor per Section 12.3.4 <br /> Ehc'-P'cE=4294 lbf horizontal seismic load effect per Equation 12.4 <br /> EVc:=0.2•SDS•PIC=3578 lbf vertical seismic load effect per Equation 12.4-4a <br /> M E`=cE•COGc=14.3132 kip ft overturning moment on tank <br /> q hcE =439.3113 lbf vertical force on anchor line <br /> cvE — <br /> danchors-LRISA, it <br /> i_ cE =225.169 lbf horizontal force on anchor line <br /> gchw _2.L ft <br /> R ISA <br /> project 2405-0007 date 2/25/2025 <br /> PSE Peterson Structural Engineers,Inc. <br /> www.psengineers.com designer TJC sheet 8 of 46 <br /> PETERSON STRUCTURAL EMOMM <br />