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CITY OF SANTA ANA <br />Project: Muir Chase Plumbing Santa n ?1aftift a0NWbt9g Agency <br />S <br />E <br />Date: 7/2 <br />SEISMIC DESIGN LOAD CALCULATIONS <br />Variable Value Unit <br />Engineer: PZSE <br />Approved <br />PERMAT iccUANCE <br />Risk Category <br />II <br />Table 1.5-1 <br />Building Importance Factor <br />le <br />1.0 <br />Section 11.5.1, Table 1.5-2 <br />PV System Importance Factor <br />IP <br />1.0 <br />Section 13.1.3 Master ID. <br />Component Amplification Factor <br />ap <br />1 <br />Table 13.6-1 Date: <br />Component Response Factor <br />RP <br />1.5 <br />Table 13.6-1 <br />Array Attachment Height above Ground <br />z <br />30.0 ft <br />13.3.1 <br />Mapped Short -Period Acceleration Parameter <br />SS <br />1.271 g <br />11.4.1 and USGS maps <br />Mapped Long -Period Acceleration Parameter <br />S1 <br />0.455 g <br />11.4.1 and USGS maps <br />Mapped Long -Period Transition Parameter <br />TL <br />8 s <br />Site Classification <br />Default <br />Conservatively enveloped (11.4.3) <br />Site Coefficient <br />Fa <br />1.200 <br />11.4.4 (Table 11.4.4-1) <br />Site Coefficient <br />F <br />1.845 <br />11.4.4 (Table 11.4.4-2) <br />Adjusted Max Spectral Response <br />SMs <br />1.525 g <br />11.4.4 <br />Adjusted Max Spectral Response <br />SM1 <br />0.839 g <br />11.4.4 <br />Design Spectral Acceleration Parameter <br />SDs <br />1.017 g <br />11.4.5 <br />Design Spectral Acceleration Parameter <br />SDI <br />0.560 9 <br />11.4.5 <br />Period parameter Ct <br />Ct <br />0.02 <br />Period parameter x <br />x <br />0.75 <br />Flexible diaphragm with vertical LFRS > 40' apart? <br />Yes <br />Fundamental Period of Structure <br />Ta <br />0.256 <br />Constant Velocity Transition Period <br />Ts <br />0.550 <br />Short Period Seismic Design Category, 0.2 sec <br />D <br />Long Period Seismic Design Category, 1.0 sec <br />D <br />Seismic Design Category, S1 > 0.75 <br />N/A <br />Controlling Seismic Design Category <br />D <br />Seismic demand on nonstructural components: <br />..................................................................................................................................................................................................................................................................................................................................................................................... ................... <br />Fp = 0.4 aP(SDs)WP11 +2(z/h)]/ (RP/IP) 0.81 *WP Equation 13.3-1 <br />Fp max = 1.6 SDs(IP)Wp 1.63 *WP Equation 13.3-2 <br />Fp min = 0.3 SDs(IP)Wp 0.31 *W Equation 13.3-3 <br />Seismic demand on array: 0.81 *W <br />Design To Accommodate Seismic Displacement per ASCE 7-16 <br />.............................................................................................................................................................................................................................................................................................................................................................................................. ...................... <br />Design Seismic Displacement AMPv 24.0 in (ASCE 7-16 13.6.12) <br />Condition Minimum Separation <br />------------------------------------------------------------------------------------------------------- <br />Between separate solar arrays of similar construction I 1.00 ft <br />------------------------------------------------------------------------------- ----------------------- <br />Between a solar array and a fixed object on the roof, <br />2.00 ft <br />---------------or solar array of different construction i ----------------------- ----------------------- <br />Between a solar array and a roof edge with a qualifying parapet I 2.00 ft <br />•-------------------------------------------------------------------------------y-----------------------' <br />Between a solar array and a roof edge without a qualifying parapet 4.00 ft <br />Notes: <br />1) A parapet is "qualifying" if the top of the parapet is not less than 12 inches in height. <br />2) The minimum allowable friction factor required for use of the prescriptive displacement method isµ = 0.4, which should be measured <br />under wet conditions per ASTM G115. If positive attachments are provided for lateral resistance of seismic forces, then the minimum <br />requirement is waived, as friction is not allowed to contribute in conjunction with attachments (IBC 1604.9) <br />3) The array is designed to move (displace) when subjected to earthquake forces. Therefore, the design displacement distance is <br />calculated to provide room for the array to move without affecting other rooftop installations. After an earthquake, the array shall be <br />returned to compliance with the separation distances listed above, and damaged anchors (if any) shall be repaired. <br />4) The contractor shall field verify all dimensions and site conditions before starting work and shall notify PZSE, Inc- Structural Engineers, <br />(PZSE, Inc) of any discrepancies. <br />5) All omissions and conflicts regarding the seismic setback specifications shall be brought to the attention of PZSE, Inc and resolved prior <br />to proceeding with work so involved. <br />Page 5 of 20 <br />