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<br /> <br />AHZ Consulting Engineers, Inc. <br />111 Rodeo <br />Irvine, CA 92602 <br />(949) 466-1544 <br />(901) 692-0431 <br /> <br /> <br />07/13/2025 <br /> <br />CalSolar, Inc. <br />200 South San Pedro St <br />Suite #500 <br />Los Angeles, CA 90012 <br /> <br />REFERENCE: 3600, S SUSAN ST, SANTA ANA, CA 92704 <br /> <br />To Whom It May Concern: <br /> <br />Per your request, we have reviewed the existing roof framing at the above referenced site. The <br />purpose of our review was to determine the adequacy of the existing structure to support the <br />proposed installation of solar panels on the roof as shown on the panel layout plan. Based upon <br />our review, we conclude that the existing structure is adequate to support the proposed solar <br />panel installation with the given geometry and weight restriction outline in this report. <br /> <br />The mechanical attachment for the PV ballast system is also designed in this calculation and can <br />be used if applicable. <br /> <br />The PV ballast system including requirements for blocks and mechanical attachments to resist <br />the wind and seismic forces (uplift, drag, lateral) to be designed by others. The design of the PV <br />ballast system is out of scope of this calculation. <br /> <br />If you have any questions, don't hesitate to contact. <br /> <br />Sincerely, <br />Arash Zandieh, Ph.D., P.E. <br />a.zandieh@ahzengineers.com | 901-692-0431 <br />AHZ Consulting Engineers, Inc. <br />ARASH ZANDIEH <br />2025.07.13 <br />21:45:00