Laserfiche WebLink
VSE Project Number: U2880.1484.211 <br />October 25, 2021 <br />Equisolar <br />16530 Ventura Blvd Suite 102 <br />Encino, CA 91436 <br />REFERENCE: Praxedis, Candido & Prisca Residence: 3702 Alder Street, Santa Ana, CA 92707 <br />Equisolar Project: 3223 <br />Solar Array Installation <br />To Whom It May Concern: <br />Per your request, we have reviewed the existing structure at the above referenced site. The purpose of our review was to <br />determine the adequacy of the existing structure to support the proposed installation of solar panels on the roof as shown on <br />the panel layout plan. <br />Based upon our review, we conclude that the existing structure is adequate to support the proposed solar panel installation. <br />Design Parameters <br />Code: California Building Code, 2019 Edition (2018 IBC) <br />Risk Category: II <br />Design wind speed, Vult: 95 mph (3-sec gust) per ASCE 7-16 <br />Wind exposure category: C <br />Seismic design category: D <br />Existing Roof Structure <br />Roof structure: 2x6 rafters @ 24" o.c. <br />Roofing material: composite shingles <br />Roof slope: 18.5° <br />Connection to Roof <br />Mounting connection: (1) 5/16" lag screw w/ min. 2.5" threaded embedment into framing at max. 48" o.c. along rails <br />(2) rails per row of panels, evenly spaced; panel length perpendicular to the rails not to exceed 80 in. Rail cantilever shall <br />not exceed 50% of connection spacing. <br />Conclusions <br />Based upon our review, we conclude that the existing structure is adequate to support the proposed solar panel installation. <br />In the area of the solar array, other live loads will not be present or will be greatly reduced (2019 CBC, Section 1607.13.5). <br />The gravity loads, and thus the stresses of the structural elements, in the area of the solar array are either decreased or <br />increased by no more than 5%. Therefore, the requirements of Section 503.3 of the 2019 CEBC are met and the structure is <br />permitted to remain unaltered. <br />651 W. Galena Park Blvd., Ste. 101 / Draper, UT 84020 / T (801) 990-1775 / F (801) 990-1776 / www.vectorse.com <br />3702 S Alder St <br />11/05/21