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STRUCTURAL CERTIFICATION REPORT <br />Roof-mounted Solar Panels <br />March 31, 2023 <br />To: Flex Energy Solar Re: Elisabeth Le Guin <br />330 E 1750 N Building B 2112 S Woodland Pl <br />Vineyard, UT 84058 Santa Ana, CA 92707 <br />Flex Energy Solar proposes to install new roof-mounted solar panels at this residence and asked Right Angle <br />Engineering to review the existing structure for suitability. This letter summarizes the methods that were used to survey, <br />evaluate, and certify the existing roof framing and the attachment of the new solar panels to it. <br />STRUCTURAL DESIGN <br />Building Code: California Residential Code 2022 <br />Design Standards: ASCE 7-16 <br />Snow: Ground: pg= 0.0 psf | Flat Roof: pf= 0.0 psf | Sloped Roof: ps= 0.0 psf <br />Wind: Ultimate Wind Speed = 95.0 mph | Exposure = C <br />Seismic: Risk Category = 2 | Seismic Design Category = A | Site Class = D <br />STRUCTURE <br />Field Technicians from Flex Energy Solar visited the site and observed the existing structure : <br />Array Name Panel Quantity Roof Framing Material Pitch <br />Array 1 4 Pre-Manufactured Truss | 24" <br />o.c.Asphalt Shingles 20° <br />Array 2 6 Pre-Manufactured Truss | 24" <br />o.c.Asphalt Shingles 20° <br />ANCHORAGE <br />The solar panel anchorage shall be installed according to the manufacturer's most current installation manual. <br />Anchorage shall be staggered to distribute the load evenly to adjacent roof members. The solar panels should be <br />mounted flush to the roof surface. <br />Array Name Connection Type Fastener Max Anchorage Spacing <br />Array 1 Quickbolt QB2 <br />5/16” lag screw (2.5" <br />embedment) into roof <br />substructure <br />72" <br />Array 2 Quickbolt QB2 <br />5/16” lag screw (2.5" <br />embedment) into roof <br />substructure <br />72" <br />Installation Instructions <br />Solar panels and the equipment shall be installed per the manufacturer's installation specifications. Improper installation <br />will void this certification. Deviations from the approved structural plans (including equipment substitutions) are not <br />allowed without written approval from Right Angle Engineering. Prior to installation, the installer should: <br />· Confirm that the existing structure matches the information provided in the structural survey, the approved <br />installation plans and this certification. <br />· Identify discrepancies between this certification and the approved installation plans. If found, then this <br />certification shall govern. <br />· Identify structural elements that are dangerous (cracked, broken, excessive sag, signs of overstress, rot,decay, <br />fire, water). If found, installation shall cease until those elements are adequately abated and made to comply with <br />the referenced building code. <br />· Verify that both the existing structure and the solar addition has been permitted through the AHJ. <br />581 E Technology Ave, C1500 | Orem, UT 84097 | 925-787-3067 | www.rightangleeng.com | Page 1 of 5 <br />2112 S Woodland <br />Pl06/20/23