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PROJECT <br />CLIENT <br />LOCATION <br />ITEM <br />McGuff TI <br />KPRS Inc <br />Santa Ana, CA <br />Hazards <br />S24-0254 <br />SHEET # <br />ENGINEER <br />DATE <br />JOB # <br />3/12/2025 <br />C. Landis <br />Exception 2 Period Calculations <br />SDS =1.052 g Design spectral response acceleration parameter <br />Ts =0.548 s Short-period transition period <br />TL =8 s Long-period transition period T ≤ 1.5Ts ?Yes <br />Ct =0.02 Approximate period parameter (ASCE7-16 Table 12.8-2)TL ≥ T > 1.5Ts ?No <br />x = 0.75 Approximate period parameter (ASCE7-16 Table 12.8-2) T > TL ?No <br />hn =33 ft Structure height <br />Ta =0.275 s Approximate structure period (ASCE7-16 Eq. 12.8-7) <br />Cs =Value per Eq. 12.8-2 <br /> BRANDOW & JOHNSTON STRUCTURAL & CIVIL ENGINEERS | LOS ANGELES NEWPORT BEACH