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5/23/2023 <br /> RE: Structural Certification for Installation of Residential solar <br /> Gerardo Barragan; 1711 West Park Lane, Santa Ana, CA 92706 <br /> Attn: To Whom It May Concern <br /> This letter is for the existing roof framing which supports the new PV modules. As well as the <br /> attachment of the PV system to existing roof framing. From the field observation report, the roof <br /> is made of Composition Shingle over roof plywood supported by 2 x 4 Rafter @ 24 Inch <br /> spacing. The slope of the roof was approximately 26 degrees. <br /> After review of the field observation data and based on our structural capacity calculation, the <br /> existing roof framing has been determined to be adequate to support the imposed loads <br /> without structural upgrades. Contractor shall verify that existing framing is consistent with the <br /> described above before install. Should they find any discrepancies, a writer's approval from the <br /> SEOR is mandatory before proceeding with install. Capacity calculations were done in <br /> accordance with applicable building codes. <br /> If you have any questions on the above, please do not hesitate to call us for further support. <br /> Sincerely, <br /> Jin Byon <br /> Registered Professional Engineer <br /> Irfan Engineering LLC <br /> design@irfanengineering.com <br /> design@irfanengineering.com Irfan Engineering LLC <br />1711 N Park Ln- 101120149 & <br />201834587/26/2024