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® <br />VSE Project Number: U3594.0103.251 <br />Suzanne Stauduhar Residence <br />1/31/2025 <br />Conclusions <br />Based upon our review,we conclude the existing structure is adequate to support the proposed solar panel installation.The <br />glass surface of the solar panels allows for a lower slope factor per ASCE 7,resulting in reduced design snow load on the <br />panels.The gravity loads,and thus the stresses of the structural elements,in the area of the solar array are either decreased <br />or increased by no more than 5%.Stress decreases or increases of no more than 5%are considered acceptable.Therefore,the <br />structure is permitted to remain unaltered. <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.Increases in lateral forces less than 10%are considered acceptable.Thus the existing lateral force <br />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 />01/31/2025 <br />_______________________________________________________ <br />Kelly Springer, P.E. <br />Project Engineer <br />Enclosures <br />KGS/acs <br />I hereby certify that this plan, specification or report was prepared <br />by me or under my direct supervision and that I am a duly Licensed <br />Professional Engineer under the laws of the State of Minnesota. <br />Kelly Springer, License No. 60925, <br />Expiration Date: 30-June-2026 <br />01/31/2025 <br />651 W. Galena Park Blvd., Ste. 101 / Draper, UT 84020 / T (801) 990-1775 / F (801) 990-1776 / www.vectorse.com