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Seismic Load Calculation for Components and System
<br />(Reference: 2018 IBC Section 1613 & ASCE 7-16 Section 13.3)
<br />0.2s Spectral Response Acceleration, Site Class B, S, =
<br />1.245
<br />(ASCE 7, Figure 22-1 thru 22-8)
<br />1.0s Spectral Response Acceleration, Site Class B, S, =
<br />0.442
<br />(ASCE 7, Figure 22-1 thru 22-8)
<br />Site Class =
<br />D
<br />(ASCE 7, Section 11.4.3)
<br />Seismic Design Category =
<br />(ASCE 7, Tables 11.6-1 & 11.6-2)
<br />Site Coefficient per S, & Site Class, F. -
<br />1.20
<br />(ASCE 7, Table 11.4-1)
<br />Site Coefficient per S, & Site Class, F
<br />(ASCE 7, Table 11.4-2)
<br />SMs = F,S,
<br />1.494
<br />(ASCE 7, Section 11.4.4)
<br />S,= FvSl =
<br />Z
<br />0.821
<br />(ASCE 7, Section 11.4.4)
<br />SDs = 2/3 SMs =
<br />0.996
<br />(ASCE 7, Section 11.4.5)
<br />SDI = 2/3 SMt =
<br />0.547
<br />(ASCE 7, Section 11.4.5)
<br />(Per ASCE 7-16, 13.3)
<br />Component Amplification Factor, ap =
<br />1.0
<br />(ASCE 7, Table 13.6-1)
<br />Component Response Modification Factor, Rp =
<br />2.5
<br />(ASCE 7, Table 13.6-1)
<br />Overstrength Factor, (1, =
<br />2.0
<br />(ASCE 7, Table 13.6-1)
<br />Component Importance Factor, Ip =
<br />1.0
<br />(ASCE 7, Table 1.5-2)
<br />Component Operating Weight, W. =
<br />Wp
<br />(Ib)
<br />Height in structure at lowest point of attachment of component, z, =
<br />128
<br />(ft)
<br />Height in structure at highest point of attachment of component, zZ =
<br />133
<br />(ft)
<br />Average Roof Height of Structure, h =
<br />128
<br />(ft)
<br />Seismic design force, FP =
<br />0.4apSDsWP
<br />(1+2z/h)
<br />v/ P
<br />E
<br />(q 13.3-1 )
<br />Max. seismic design force, Fp,,,,, =
<br />1.65DSIPWP
<br />(Eq. 13.3-2)
<br />Min. seismic design force, Fp,,, =
<br />0.3SDSIpWp
<br />(Eq. 13.3-3)
<br />Seismic design force at lowest point, Fp, =
<br />Seismic design force at highest point, Fp2 =
<br />Min. seismic design force, Fp,,,i =
<br />Max. seismic design force, Fp,,,,, _
<br />0.478 Wp
<br />Fp IpvGi= 0.484
<br />0.491 Wp
<br />0.299 Wp
<br />1.594 Wp
<br />Seismic design force, Fp (ASD) = 0.346 Wp
<br />BEL
<br />C ChlllM
<br />ENGINEERING
<br />Seismic Loads For Components &Systems
<br />250 4th Ave. South EVERETT CITY HALL I
<br />N.T.S.
<br />Suite 200 lob N.
<br />Edmonds, WA 98020 21015.312
<br />9/27/2023
<br />M
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