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Page 2 of 2 <br />B. Solar Panel Anchorage <br />1. EcoFasten Installation <br />Manual e found on the EcoFasten website (http://EcoFasten.com/). If during solar <br />panel installation, the roof framing members appear unstable or deflect non-uniformly, our office <br />should be notified before proceeding with the installation. <br />2. Maximum allowable pullout per lag screw is 235 lbs/inch of penetration as identified in the National <br />Design Standards (NDS) of timber construction specifications for Doug-Fir (North Lumber) <br />assumed. Based on our evaluation, the pullout value, utilizing a penetration depth of 2 ½ <br />than what is allowable per connection and therefore is adequate. Based on the variable factors for <br />the existing roof framing and installation tolerances, using a thread depth of 2 ½ <br /> screw per attachment point for panel anchor mounts should be adequate with a <br />sufficient factor of safety. <br />3. Considering the roof slopes, the size, spacing, condition of roof, the panel supports shall be placed <br />no greater than 48 c. <br />Based on the above evaluation, it is the opinion of this office that with appropriate panel anchors being utilized <br />the roof system will adequately support the additional loading imposed by the solar panels. This evaluation is in <br />conformance with the 2019 California Building Code, current industry standards, and is based on information <br />supplied 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 /> <br /> <br />Scott E. Wyssling, PE <br />California License No. 83664 <br />2202 N Freeman St <br />02/08/22