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,�,�NSULTI Wyssling Consulting <br /> . 76 North Meadowbrook Drive <br /> Alpine, UT 84004 <br /> Scott E. Wyssling, PE, PP, CME office (201) 874-3483 <br /> swyssling@wysslingconsulting.com <br /> September 9, 2020 <br /> Suntuity Solar <br /> 2137 Route 35 <br /> Holmdel, NJ 07733 <br /> Re: Engineering Services <br /> Lugo Residence <br /> 3290 Lytton Hall Drive, Zephyrhills FL <br /> 8.820 kW System <br /> To Whom It May Concern: <br /> Pursuant to your request, we have reviewed the following information regarding solar panel installation on <br /> the roof of the above referenced home: <br /> 1. Site Visit/Verification Form prepared by a Suntuity Solar representative identifying specific <br /> site information including size and spacing of rafters for the existing roof structure. <br /> 2. Design drawings of the proposed system including a site plan, roof plan and connection <br /> details for the solar panels. This information was prepared by Suntuity Solar and will be <br /> utilized for approval and construction of the proposed system. <br /> 3. Photographs of the interior and exterior of the roof system identifying existing structural <br /> members and their conditions. <br /> Based on the above information we have evaluated the structural capacity of the existing roof system to <br /> support the additional loads imposed by the solar panels and have the following comments related to our <br /> review and evaluation: <br /> Description of Residence: <br /> The existing residence is typical wood framing construction with the roof system consisting of truss system <br /> with all chords constructed of 2 x 4 dimensional lumber at 24" on center. The attic space is unfinished and <br /> photos indicate that there was free access to visually inspect the size and condition of the roof rafters. All <br /> wood material utilized for the roof system is assumed to be Doug-Fir#2 or better with standard construction <br /> components. The existing roofing material consists of composite asphalt shingles. Photos of the dwelling <br /> also indicate that there is a permanent foundation. <br /> A. Loading Criteria Used <br /> • 145 MPH wind loading based on ASCE 7-10 Exposure Category"B" at a slope of 20 degrees <br /> • 7 PSF = Dead Load roofing/framing Live Load = 20 PSF/0 PSF(where panels are installed) <br /> • 3 PSF= Dead,Load solar panels/mounting hardware <br /> Total Dead Load=10 PSF <br /> The above values are within acceptable limits of recognized industry standards for similar <br /> structures in accordance with the (FBC 2017, 6th Edition). Analysis performed of the existing roof <br /> structure utilizing the above loading criteria indicates that the existing rafters will support the <br /> additional panel loading without damage, if installed correctly. <br />