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Project: Muir Chase Plumbing Santa <br />P— a Date: 7/29/ <br />WIND DESIGN LOAD CALCULATIONS <br />Design Wind Load Calculation for Sollega FastRack system per Wind Tunnel Test Report <br />CITY OF SANTA ANA <br />f la fti ft a0gk(Wbt!3g Agency <br />4 Engineer: PZSE <br />Approved <br />FOR PERMIT ISSUANCE <br />(ASCE 7-16 §29.4.3) <br />Description <br />Variable <br />Value Unit <br />Risk Category <br />II�alieY <br />Importance factor (ASCE 7-05 only) <br />1 <br />1.00 <br />Exposure Category <br />C <br />Date: <br />Mapped Wind Velocity <br />V <br />95 mph <br />Adjustment Factor for Height and Exposure Category <br />KZ <br />0.98 <br />ASCE 7-16 (Table 26.10-1) <br />Topographic Factor (assumed to be 1 for level ground) <br />Kzt <br />1.0 <br />ASCE 7-16 26.8-1 <br />Directionality Factor <br />Kd <br />0.85 <br />ASCE 7-16 (Table 26.6-1) <br />Elevation Factor <br />Ke <br />1.00 <br />ASCE 7-16 26.9 <br />Velocity Pressure <br />qh <br />16.68 psf <br />ASCE 7-16 (Eqn 26.10-1) <br />Tilt Angle of Module <br />W <br />6 degrees <br />Friction Factor <br />µ <br />0.4 <br />SEACC PV1-2012 <br />Wind Equation & Governing Load Combinations <br />Design Wind Force: W = qh (GCp) * A <br />Eq.: 2.4.1-5: D + 0.6W (Downward) <br />Eq.: 2.4.1-7: 1D + 0.6W (Uplift and Drag) <br />.................................................................................................................................................................................................................................................................................................................................................. <br />Building and Array Parameters <br />Average Roof Height of Structure Above Ground <br />h <br />30 ft <br />Parapet Height <br />hpt <br />3 ft <br />North -South Width of Building <br />WN_S <br />77.5 ft <br />Roof Zone Width parallel to North -South <br />Ll, LZ, L7, or L$ <br />65.6 ft <br />East-West Width of Building <br />WE_W <br />122.5 ft <br />Roof Zone Width parallel to East-West <br />L4, or L5 <br />65.6 ft <br />PV Module Length <br />Ip <br />3.42 ft <br />Tilt Angle of Module <br />W <br />6.00 degrees <br />PV Module Height Above Roof at Low (South) Edge <br />hl <br />0.54 ft <br />PV Module Height Above Roof at High (North) Edge <br />hz <br />0.90 ft <br />Array Zone Key: <br />Array 1 <br />North Row, 1st-4th Module <br />Array 2 <br />North Row, Interior Module <br />Array 3 <br />Interior Row, 1st-4th Module <br />Array 4 <br />Interior Row, Interior Module <br />Array 5 <br />South Row, 1st-4th Module <br />Array 6 <br />T South Row, Interior Module <br />Note: <br />1. GCp values are derived per the wind tunnel test report by Institut fiir Industrieaerodynamik GmbH [IFI] (Report SCF02-1, dated March 12, <br />2019)." <br />2. Pressures and results converted to US standard units for use in the North American market . <br />3. Maximum allowable building height is 60 ft, unless it can be demonstrated that the building's natural period, T, is less than 1 second. Per <br />guidance given in ASCE 7 section 26.11.3, the estimated period of this structure is 0.4 seconds. <br />Page 6 of 20 <br />