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Project: Santa Ana -- Job #: 2023-10986 Date: 9/12/2023 Engineer: BV Description Variable Value Unit ASCE 7-16 Risk Category II Table 1.5-1 Building Importance Factor Ie 1.0 Section 11.5.1, Table 1.5-2 PV System Importance Factor Ip 1.0 Section 13.1.3 Component Amplification Factor ap 1 Table 13.6-1 Component Response Factor Rp 1.5 Table 13.6-1 Array Attachment Height above Ground z 35.0 ft 13.3.1 Mapped Short-Period Acceleration Parameter SS 1.313 g 11.4.1 and USGS maps Mapped Long-Period Acceleration Parameter S1 0.471 g 11.4.1 and USGS maps Mapped Long-Period Transition Parameter TL 8 s Site Classification Default Conservatively enveloped (11.4.3) Site Coefficient Fa 1.200 11.4.4 (Table 11.4.4-1) Site Coefficient Fv 1.829 11.4.4 (Table 11.4.4-2) Adjusted Max Spectral Response SMS 1.576 g 11.4.4 Adjusted Max Spectral Response SM1 0.861 g 11.4.4 Design Spectral Acceleration Parameter SDS 1.050 g 11.4.5 Design Spectral Acceleration Parameter SD1 0.574 g 11.4.5 Period parameter Ct Ct 0.02 Period parameter x x 0.75 Flexible diaphragm with vertical LFRS > 40' apart?Yes Fundamental Period of Structure Ta 0.288 Constant Velocity Transition Period TS 0.547 Short Period Seismic Design Category, 0.2 sec D Long Period Seismic Design Category, 1.0 sec D Seismic Design Category, S 1 > 0.75 N/A Controlling Seismic Design Category D Fp = 0.4 ap(SDS)Wp[1 +2(z/h)]/ (Rp/Ip) 0.84 *Wp Equation 13.3-1 Fp max = 1.6 S DS(Ip)Wp 1.68 *Wp Equation 13.3-2 Fp min = 0.3 S DS(Ip)Wp 0.32 *Wp Equation 13.3-3 Seismic demand on array: 0.84 *Wp Design Seismic Displacement ΔMPV 25.4 in (ASCE 7-16 13.6.12) Minimum Separation 1.06 ft 2.12 ft 2.12 ft 4.23 ft Notes: 1) 2) 3) 4) 5) SEISMIC DESIGN LOAD CALCULATIONS Design To Accommodate Seismic Displacement per ASCE 7-16 Seismic demand on nonstructural components: Between a solar array and a roof edge with a qualifying parapet Between a solar array and a roof edge without a qualifying parapet Condition The array is designed to move (displace) when subjected to earthquake forces. Therefore, the design displacement distance is calculated to provide room for the array to move without affecting other rooftop installations. After an earthquake, the array shall be returned to compliance with the separation distances listed above, and damaged anchors (if any) shall be repaired. The minimum allowable friction factor required for use of the prescriptive displacement method is μ = 0.4, which should be measured under wet conditions per ASTM G115. If positive attachments are provided for lateral resistance of seismic forces, then the minimum requirement is waived, as friction is not allowed to contribute in conjunction with attachments (IBC 1604.9) A parapet is "qualifying" if the top of the parapet is not less than 12 inches in height. Between separate solar arrays of similar construction Between a solar array and a fixed object on the roof, or solar array of different construction The contractor shall field verify all dimensions and site conditions before starting work and shall notify PZSE, Inc- Structural Engineers, (PZSE, Inc) of any discrepancies. All omissions and conflicts regarding the seismic setback specifications shall be brought to the attention of PZSE, Inc and resolved prior to proceeding with work so involved. Page 4 of 52 3600 W Segerstrom Ave - 101117310 & 201813801/11/2024