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trsoilarCity <br />3055 Clearview Way <br />San Mateo, CA. 94402 <br />(888)·SOL<ITY (765·2489) www.solaicity.com CEIVE <br />SEP 1 6 2013 IW1 <br />September 5, 2013 <br />Project/Job # 927402 City of Santa Ana <br />RE:COVER LETTER <br />Project:Vandervoort Residence <br />2025 N Olive St <br />Santa Ana, CA 92706 <br />To Whom It May Concern, <br />A jobsite survey of the existing framing system was performed by an audit team from SolarCity. The attached structural calculations are <br />based on site observations and the design criteria listed below: <br />Design Criteria: <br />- Applicable Codes = 2010 CBC, ASCE 7-05, and 2005 NDS <br />- Roof Dead Load = 8 psf (All MPs) <br />- Roof Live Load = 20 psf (All MPs) <br />- Ground Snow Load = 0 psf <br />- Risk Category = II, Wind Speed = 85 mph, Exposure Category C <br />- Solar modules = As indicated in attached drawings. <br />On the above referenced project, the structural roof framing has been reviewed for loading from the PV system on the roof. The <br />structural review, including the plans and calculations only apply to the section of roof that is directly supporting the PV system and its <br />supporting elements. After review it was determined that the existing structure is adequate to carry the PV system loading. <br />The structural roof framing and the new attachments that directly support the gravity loading from PV modules have been reviewed <br />and determined to meet or exceed requirements of the 2010 CBC. <br />Please contact me with any further questions or concerns regarding this project. <br />Sincerely, <br />Abe De Vera, P.E. <br />Civil Engineer <br />Main: 888.765.2489, x7526 <br />email: adevera@solarcity.com 62<< Nd r52202 1,1 <br />Clvi <br />r Digitally signed by Abe De Vera <br />Date: 2013.09.05 06:48:16 <br />-07'00' <br />i