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PROJECT ADDRESS: 328 N_HARBOR BLVD, SANTA ANA, CA 92703 <br />MECHANICAL UNIT ON ROOF TOP <br />MECHANICAL UNIT ON ROOF TOP <br />BASIC DESIGN PARAMETERSE PER ASCE7-22 AND CBC2025 <br />SDS =1.17 <br />z/h =1 <br />Response Mod. Coeff.R =6 Table 12.2-1 <br />Component Importance Factor Ip =1 Chapter 13.1.3 <br />Importance Factor by Risk Cat.Ie =1 Table 1.5-2 <br />Oversrength Factor Omega =2.5 Table 12.2-1 <br />Component operating Weight:Wp =687 lbs See Specs by MFR. <br />Amplification with Height Hf = 1+2.5(z/h)(13.3-5) <br />Hf =3.5 <br />Structure Ductility Reduction Factor Ru = [1.1R/(Ie*Omega)]^1/2 >= 1.3 (13.3-6) <br />Ru =1.63 <br />CAR =1.4 Table 13.5-1 <br />Component strength factor Rpo =1.5 Table 13.5-1 <br />Horizontal Seismic Design Fp =0.4*Sds*Ip*Wp*[Hf/Ru]*[CAR/Rpo] <br />Fp =644.35 #GOVERNED <br />Fpmax = 1.6*Sds*Ip*Wp <br />Fpmax =1286.07 # <br />Fpmin = 0.3*Sds*Ip*Wp <br />Fpmin = 241.137 # <br />GENERATOR DIMENSIONS: <br />H =4.2 ft <br />W =4.7 ft <br />OVERTURNING LC: 0.6D + 0.7E <br />M (overturning) = 0.6*(Wp*W/2) - 0.7*Fp*H/2 =21.48 lbs-ft <br />USE (1) 3/8" DIA. X 6" LONG LAG SCREW EA. CORNER (4 TOTAL). <br />PLATFORM AREA: 6.5FT X 9FT <br />W=6.5 FT <br />D=9 FT <br />UNIFORM DL OF MECH UNIT =11.7436 PSF <br />UNIFORM LL=20 PSF <br />NO LIVE LOAD ON TOP OF MECH. UNIT, ROOF JOIST ARE OKAY <br />Component resonance ductility factor that converts the <br />peak floor or ground acceleration into the peak component acceleration <br />8 of 9