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Page 2 of 2 <br />D.Solar Panel Anchorage <br />1. The solar panels shall be mounted in accordance with the most recent Everest Solar Systems <br />installation manual. If during solar panel installation, the roof framing members appear unstable or <br />deflect non-uniformly, our office should be notified before proceeding with the installation. <br />2. The maximum allowable withdrawal force for a M5 x 60mm lag screw is 213 lbs per inch of <br />penetration as identified in the National Design Standards (NDS) of timber construction <br />specifications. Based on a minimum penetration depth of 2”, the allowable capacity per connection <br />is greater than the design withdrawal force (demand). Considering the variable factors for the <br />existing roof framing and installation tolerances, the connection using two (2) M5 x 60mm lag screw <br />with a minimum of 2” embedment will be adequate and will include a sufficient factor of safety. <br />3. Considering the wind speed, roof slopes, size and spacing of framing members, and condition of <br />the roof, the panel supports shall be placed no greater than 72” on center. <br />4. Panel supports connections shall be staggered to distribute load to adjacent framing members. <br />Based on the above evaluation, this office certifies that with the racking and mounting specified, the existing <br />roof system will adequately support the additional loading imposed by the solar system. This evaluation is in <br />conformance with the 2019 CRC, current industry standards and practice, and is based on information supplied <br />to us at the time of this report. <br />Should you have any questions regarding the above or if you require further information do not hesitate to <br />contact me. <br />Very truly yours, <br />Scott E. Wyssling, PE <br />California License No. 83664 <br />Signed: 12/02/22 <br />1313 S Baker St <br />03/24/23