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<br /> 76 North Meadowbrook Drive <br />Scott E. Wyssling, PE Alpine, UT 84004 <br />Coleman D. Larsen, SE, PE office (201) 874-3483 <br />Gregory T. Elvestad, PE swyssling@wysslingconsulting.com <br /> <br /> <br /> <br />November 3, 2023 Revised January 4, 2024 Flagship Holdings, LLC 15911 Canterbury Court Bakersfield, CA 93314 Re: Engineering Services Mangosing Residence 118 W Stevens Avenue, Santa Ana CA 9.480 kW System To Whom It May Concern: We have received information regarding solar panel installation on the roof of the above referenced structure. Our evaluation of the structure is to verify the existing capacity of the roof system and its ability to support the additional loads imposed by the proposed solar system. <br />A. Site Assessment Information 1. Site visit documentation identifying attic information including size and spacing of framing for the existing roof structure. 2. Design drawings of the proposed system including a site plan, roof plan and connection details for the solar panels. This information will be utilized for approval and construction of the proposed system. <br />B. Description of Structure: <br /> <br />Roof Framing: Assumed prefabricated wood trusses with all truss members constructed of 2 x 4 dimensional lumber at 24” on center. <br />Roof Material: Tile Roofing <br />Roof Slope: 18.43 degrees <br />Attic Access: Inaccessible <br />Foundation: Permanent <br /> <br />C. Loading Criteria Used <br /> <br />• Dead Load <br />o Existing Roofing and framing = 13 psf <br />o New Solar Panels and Racking = 3 psf <br />o TOTAL = 16 PSF <br />• Dead Load <br />o Existing Roofing and framing = 7 psf <br />o New Solar Panels and Racking = 3 psf <br />o TOTAL = 10 psf <br />• Live Load = 20 psf (reducible) – 0 psf at locations of solar panels <br />• Ground Snow Load = 0 psf <br />• Wind Load based on ASCE 7-16 <br />o Ultimate Wind Speed = 95 mph (based on Risk Category II) <br />o Exposure Category C <br /> <br />Analysis performed of the existing roof structure utilizing the above loading criteria is in accordance <br />with the 2022 California Building Code, including provisions allowing existing structures to not <br />require strengthening if the new loads do not exceed existing design loads by 105% for gravity <br />elements and 110% for seismic elements. This analysis indicates that the existing framing will <br />support the additional panel loading without damage, if installed correctly. <br />118 W Stevens Ave - <br />201817302/22/2024