Laserfiche WebLink
DATE: 10-28-2021/Rev B <br />FOR: Unique Solar Design JOB: Abel Marica (Santa Ana) <br />13535 Valerio Street Apt 204 2210 West Avalon Avenue <br />Van Nuys, CA 91405 Santa Ana, CA 92706 <br />USA <br />To Whom It May Concern <br />This letter is to certify that we have performed a structural analysis of the existing roof members that are to <br />support photovoltaic panels, as shown on the attached report. The calculations were performed in accordance <br />with the latest editions of IBC, NDS, ASCE/SEI, CBC, and IRC, and the latest edition of the building codes <br />for the state of California. <br />Our analysis was based on the following design criteria: <br />Ground Snow (psf)0 psf <br />Sloped Snow (psf), reduced per ASCE, Sect. 7.4 0 psf <br />Basic Wind Speed (mph):110 mph <br />Roof Slope:20 degrees <br />The PV module orientation:Landscape <br />The maximum horizontal roof mount spacing:6 ft. <br />The maximum vertical roof mount spacing:1.708 ft. <br />Staggered roof mounts required?Yes <br />Based on this analysis, we can certify that the individual existing roof framing members that support the <br />PV panels; and the individual roof members as described in the attached report; are adequate to support the <br />design loads as required by the various codes. This includes Dead Loads (including the weight of the PV <br />panels), Live Loads, Snow Loads, and Wind Loads, on the roof members that support the PV panels, <br />combined as required in the codes. <br />If you have any questions on this or need further clarification, <br />please contact us at your convenience. <br />Sincerely, <br />Paul Truong, P.E. <br />NOTE: <br />1. Prior to commencement of work, the Solar Installer shall verify <br /> that the roof framing sizes, spacing, and spans (between supports), <br /> are as noted in these plans. The Engineer of Record must be <br /> notified if any discrepancies are discovered, before proceeding. <br />2. These plans are Stamped for Structural Code compliance of <br /> the roof members that support the PV solar system only. <br />3. These plans are not stamped for rain water leakage prevention. <br />4. As a precaution, old or wet snow should be removed from the roof, <br /> if the snow builds up to 18" or more. <br />Digitally Signed by <br />Phong Truong, P.E. <br />Date: 2021.10.28 09:08:47 -0700