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Tacos Los Cholos Hood Attachment Calculation <br /> Site Parameters <br /> Occupancy: Restaurant (A-2) <br /> Risk Category: II <br /> Component Importance Factor: I P = 1.0 <br /> Number of stories: 5 <br /> S DS = 1.17 s <br /> Coefficients for Mechanical and Electrical Components (Table 13.6-1) <br /> C AR = 1.4 <br /> R po = 2.0 <br /> 0P = 2.0 Ω <br /> Design coefficients and factors for seismic force-resisting system (Table 12.2-1) <br /> Bearing wall system: Wood shear wall: R = 6.5 and Ω 0 = 3 <br /> S DS = 1.17s <br /> Seismic Importance Factor: I e = 1.0 <br /> Component Importance Factor: I p = 1.0 <br /> Redundancy factor: = 1.0 ρ <br /> Height of attachment: z = 20 ft <br /> Average roof height: ℎ = 65 ft <br /> Approximate fundamental period of the supporting structure, T a (Section 12.8.2.1) <br /> ℎ n = ℎ = 65 ft <br /> C t = 0.02 <br /> x = 0.75 <br /> T a = C t ℎ n x = (0.02)(65 ft) 0.75 = 0.46 s <br /> Force amplification factor as a function of height in the structure, H f <br /> 1 = = = 2.2 > 2.5, use 1 = 2.5 𝑎 1 <br /> 𝑇𝑎 <br /> 1 <br />. 46 𝑎 <br /> 2 =[1-(0.4/T a ) 2 ] = [1-(0.4/.46) 2 ] = 0.24, use 2 =0.24 𝑎 𝑎 <br /> H f = 1 + 1 ( ) + 2 ( ) 10 = 1 + 2.5( ) + 0.24( ) 10 = 1.8 𝑎 𝑧 <br /> ℎ 𝑎 𝑧 <br /> ℎ <br /> 20 <br /> 65 <br /> 20 <br /> 65 <br /> Structure ductility reduction factor, R µ <br /> R = (1.1R/(I e Ω 0 )) ½ = (1.1(6.5/((1)(3))) ½ = 1.6 µ <br />113 E Fourth St <br />4/16/2025