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® <br />VSE Project Number: U3998.0088.241 <br />Grovemont Residence <br />1/29/2024 <br />The solar array will be flush-mounted (no more than 10"above the roof surface)and parallel to the roof surface.Thus,we <br />conclude that any additional wind loading on the structure related to the addition of the proposed solar array is negligible. <br />The attached calculations verify the capacity of the connections of the solar array to the existing roof against wind (uplift), <br />the governing load case.Regarding seismic loads,we conclude that any additional forces will be small.Conservatively <br />neglecting the weight of existing wall materials,the installation of the solar panels represents an increase in the total weight <br />(and resulting seismic load)of 2.9%.Increases in lateral forces less than 10%are considered acceptable.Thus the existing <br />lateral force resisting system is permitted to remain unaltered. <br />Limitations <br />Installation of the solar panels must be performed in accordance with manufacturer recommendations.All work performed <br />must be in accordance with accepted industry-wide methods and applicable safety standards.The contractor must notify <br />Vector Structural Engineering,LLC should any damage,deterioration or discrepancies between the as-built condition of the <br />structure and the condition described in this letter be found.The use of solar panel support span tables provided by others is <br />allowed only where the building type,site conditions,site-specific design parameters,and solar panel configuration match <br />the description of the span tables.The design of the solar panels,solar racking (mounts,rails,etc.)and electrical engineering <br />is the responsibility of others.Waterproofing around the roof penetrations is the responsibility of others.Vector Structural <br />Engineering assumes no responsibility for improper installation of the solar array.Vector Structural Engineering shall be <br />notified of any changes from the approved layout prior to installation. <br />VECTOR STRUCTURAL ENGINEERING, LLC <br />01/29/2024 <br />_______________________________________________________ <br />Jacob Proctor, P.E. <br />CA License: 70567 - Expires: 06/30/2025 <br />Project Engineer <br />Enclosures <br />JSP/jsj <br />01/29/2024 <br />651 W. Galena Park Blvd., Ste. 101 / Draper, UT 84020 / T (801) 990-1775 / F (801) 990-1776 / www.vectorse.com <br />901 E Grovemont St- <br />101118284 & 201821233/21/2024