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December 11, 2024 Subject: Proposed Solar Panel Installation Rosales, Rogelio Residence, 1012 N King St, Santa Ana, CA Job #001-04502 To Whom it May Concern, Design Parameter Summary Governing Building Code: 2022 California Residential Code Risk Category: II Wind Exposure: C Design Wind Speed: 115 mph Ground Snow Load: 0 psf Roof Information Roofing Material: Clay Tile, Mod Bit Roof Slope: 20, 1 degrees We have reviewed information, provided by our client, related to the proposed solar panel installation at the above-referenced address. The purpose of the review was to determine if the existing roof is structurally adequate for the proposed installation. Based on our review and analysis of the given information, and in accordance with governing building codes, I certify that the capacity of the structural roof framing that directly supports the additional gravity loading due to the solar panel supports and modules had been reviewed and determined to meet or exceed the requirements in accordance with the Design Criteria. Engineering Analysis Lag Screws: 2 screws, 5/16" dia min., with min. 2.5" embedment into roof truss top chord only, at 72" O.C. max Roof Structure: 2x4 Manufactured Trusses @ 24" O.C. (assumed) Roof Connection Details (Roof 1) Roof Connection Details (Roof 2) Lag Screws: 1 screws, 5/16" dia min., with min. 2.5" embedment into roof truss top chord only, at 72" O.C. max Wind uplift on the panels has been calculated in accordance with the relevant provisions of ASCE 7-16. This loading has been used to verify the adequacy of the connection specified above. Connection locations should be in accordance with design drawings. Stagger attachments to avoid overloading any individual truss top chord. The proposed installation will be 6" max. above the roof surface (flush mounted) and parallel to the roof surface. Therefore, any increase in wind loading on the building structure from the solar panel installation is expected to be negligible. Wind is the governing lateral load case. Because the increase in lateral loading is not increased by more than 10%, per provisions in the adopted building codes, the structure need not be altered for lateral loading. Everest K2 Systems Crossrail 44-X rails will support the modules and will fasten to the roof structure with Everest K2 Flat Tile Hook and K2 Big Foot along the rail. The proposed installation - including weight of panels, racking, mounts, and inverters where applicable - will be approximately 3 psf. In the areas where panels are installed, roof live loads will not be present. The reduction of roof live load is adequate to fully or partially compensate for the addition of the panel installation. Because the member forces in the area of the solar panels are not increased by more than 5%, and so per provisions in the adopted building codes, the structure need not be altered for gravity loading. 1012 N King St 1/23/2025