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Foster Printing 03/08/2023 <br />Brett Allen, P.E. <br />DETERMINE BALLAST REQUIREMENTS FOR EKONORACK SYSTEM BY KB RACKING-BUILDING 1 <br />Project Information <br />Project Name & Location -Foster Printing, 700 East Alton Ave, Santa Ana, CA 92705 <br />KB Racking Project Number -- <br />Building Code -2022 CBC, 2021 IBC, ASCE 7-16 <br />Wind Loading - ASCE Standard - ASCE 7 Chapter 27 Directional Procedure <br />3 Second Wind Gust -V = 95 mph Risk Cat. II <br />Importance Factor -I w = 1.00 <br />ASD Conversion Factor -Ω = 0.6 <br />Wind Exposure -Exposure = B <br />Mean Roof Height -Hr = 23 ft <br />3-Second Gust-Speed Power Law Exponent -α = 7 <br />Nominal Height of Atmospheric Boundary Layer -zg = 1200 ft <br />Wind Directionality Factor -Table 26.6-1 Kd = 0.85 <br />Velocity Exposure Coefficient -Table 26.10-1 Kz = 0.7 <br />Topographic Factor -Section 26.8.2 Kzt = 1 <br />Ground Elevation Factor -Section 26.9 Ke = 1.000 <br />Velocity Pressure -27.3.2 qz = 8.14 psf <br />Velocity Pressure w/o ASD Conversion -qz,LRFD = 13.75 psf <br />Array Layout & Panel Information <br />Solar Panel Length -lpanel = 89.210 in <br />Solar Panel Length (Design) -lpaneld = 89.997 in <br />Solar Panel Width -wpanel = 44.650 in <br />Solar Panel Row Spacing -wspacing = 58.224 in <br />Solar Panel Thickness -tpanel = 1.380 in <br />Solar Panel Uplift Area -Aup = 27.631 ft2 <br />Solar Panel Drag Area -Adrag = 3.263 ft2 <br />Solar Panel Design Area -Apd = 36.389 ft2 <br />Solar Panel Weight -Wpanel = 71.000 lb <br />Panel Weight + Hardware -Wtotal = 75.852 lb <br />Drag Force Coefficients <br />Design Wind Pressures <br />Note: drag force coefficients were provided in the wind tunnel test report prepared by RWDI Inc. "KB RACKING ROOF-MOUNTED PV RACKING SYSTEMS WIND <br />PRESSURE STUDY", Report #1600846 and are the property of KB Racking. The following calculations contained within use the drag force coefficients determined by <br />RWDI for the PV system by KB Racking installed at the tilt angle defined above. The drag force coefficients have been hidden from the calculations as they are the property <br />of KB Racking. <br />Note: design wind pressures are a function of the drag coefficients for the PV solar system by KB Racking determined in the above-referenced wind tunnel testing. Use of <br />the drag coefficients or wind pressures shown below by others is not permitted for any other system. Eclipse Engineering have provided a review of the plans and <br />calculations prepared by KB Racking for the above-noted project only. <br />3/23 <br />700 E Alton Ave - <br />101114289 & <br />2017906306/06/23