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STRUCTURAL CERTIFICATION REPORT <br />Roof-mounted Solar Panels <br />March 07, 2025 <br />To: Sunrun Re: Theodore Arroyos <br />1800 Ashton Blvd 1312 S Hickory St <br />Lehi, UT 84043 Santa Ana, CA 92707 <br />AHJ: Santa Ana (City), CA <br />Sunrun proposes to install new roof-mounted solar panels at this residence and asked Right Angle Engineering to review <br />the existing structure for suitability. This letter summarizes the methods that were used to survey, evaluate, and certify <br />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 = 96.0 mph | Exposure = C <br />Seismic:Risk Category = 2 | Seismic Design Category = A | Site Class = D <br />STRUCTURE <br />Field Technicians from Sunrun visited the site and observed the existing structure : <br />Array Name Panel Quantity Roof Framing Material Pitch <br />Array 1 8 2x6 Rafter| 16" o.c.Asphalt Shingles 10° <br />ANCHORAGE <br />The solar panel anchorage shall be installed according to the manufacturer's most current installation manual. The <br />attachment configuration should match the certified building plans. The solar panels should be mounted parallel (max 5 <br />inches) to the roof surface. <br />Array Name Connection Type Fastener Max Anchorage Spacing <br />Array 1 Umbrella L-Foot <br />5/16” lag screw (2.5" <br />embedment) into roof <br />substructure <br />64" <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. If deviations from the approved structural plans occur, Right Angle Engineering must be <br />notified. Prior to installation, the installer should: <br />Confirm that the existing structure matches the information provided in the site survey, the approved installation <br />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 />757 Technology Ave, F31 | Orem, UT 84097 | 925-787-3067 | www.rightangleeng.com | Page 1 of 6 <br />1312 S Hickory St <br />5/5/2025