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76 North M eadowbrook Drive <br />Scott E. Wyssiing, P E A l p i n e, U T 8 4 0 0 4 <br />Col eman D. Larsen, SE, PE office (201} 8 7 4 -3 4 8 3 <br />Gregory T. Elvestad, P E swyssling@wysstingconsulting.com <br />April 26, 2023 <br />Current Insight <br />2852 W . Amini W a y <br />South Jordan, UT 84095 <br />Re: Engineering Services <br />Hernandez R esidence <br />1402 Alona Street, Santa A na C A <br />7.020 k W System <br />To W h om It M ay Concern: <br />W e have received information regarding solar panel installation on the roof of the above referenced <br />structure. Our evaluation of the structure is to verify the existing capacity of the roof system and its ability <br />to support the additional loads imposed by th e proposed solar system. <br />A. Site A s s e s s m e n t i n f o r m a t i o n <br />1. Site visit documentation identifying attic information including size and spacing of framing <br />for the existing roof structure. <br />2. Design drawings of the proposed system including a site plan, roof plan and connection <br />details for the solar panels. This information wiil be utilized for approval and construction <br />of the proposed system. <br />B. D es cr i p t i o n o f S t ruct ur e: <br />R o o f F r a m i n g : 2x4 dimensional lumber at 16? on center. <br />R o o f M ateri al : Composite A sp h al t Shingles <br />R o o f S l op e: 19 and 21 degrees <br />A tt i c A c c e s s : Accessible <br />F o u n d a t i o n : ? Permanent <br />C. L o a d i n g Cri teria U s ed <br />«D ead L o a d <br />o Existing Roofing an d framing = 7 psf <br />o N ew Sol ar Panels and Racking = 3 psf <br />o T O T A L = 1 0 PSF <br />e L i v e L o ad = 20 psf (reducible) - 0 p s f at locations of solar panels <br />«*G r o u n d S n o w L oad =0 psf <br />«W i n d L oad based on A S C E 7-16 <br />o Ultimate Wi n d Speed = 95 m p h (based on Risk Category II) <br />o Exposure Category C <br />A n a l y s i s p e r f o r m e d o f t h e e x i s t i n g r o o f s t r u c t u r e util iz ing t h e a b o v e l o a d i n g criteria i s in a c c o r d a n c e <br />w ith t h e 2 0 2 2 C a l i f o r n i a B u i l d i n g C o d e , i n c l u d i n g p r o v i s i o n s a l l o w i n g e x i s t i n g s t r u c t u r e s to n o t <br />r eq u i r e s t r e n g t h e n i n g i f the n e w l o a d s d o n o t e x c e e d e x i s t i n g d e s i g n l o a d s b y 1 0 5 % f o r g r a v i t y <br />e l e m e n t s a n d 1 1 0 % f o r s e i s m i c e l e m e n t s . T h i s a n a l y s i s i n d i c a t e s t h a t t h e ex i s t i n g f r a m i n g w i l l <br />s u p p o r t the a d d i t i o n a l p a n e l l o a d i n g w i t h o u t d a m a g e , i f i n s t al l ed cor r ectl y . <br />2402 N Alona St <br />06/06/23