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P a g e 2 o f 2 D. S o l a r P a n e l A n c h o r a g e 1. The solar panels shall be mounted in accordance with the most recent Unirac installation manual. If during solar panel installation, the roof framing m e m b e rs a p p e a r unstable or deflect non- uniformly, our office should be notified before proceeding with the installation. 2. T h e m a x i m u m a l l o w a b l e w i t h d r a w a l f o r c e fo r a 5/15? l a g s c r e w is 2 3 5 I b s p e r i n c h o f p e n e t r a t i o n a s i d e n ti f i e d in t h e N a t i o n a l D e s i g n S t a n d a r d s ( N D S ) o f t i m b e r c o n s t r u c t i o n s p e c i f i c a t i o n s . B a s e d o n a m i n i m u m p e n e t r a t i o n d e p t h o f 2%?, t h e a l l o w a b l e c a p a c i t y p e r c o n n e c t i o n is g r e a t e r t h a n t h e d e s i g n w i t h d r a w a l f o r c e ( d e m a n d ) . C o n s i d e r i n g t h e v a r i a b l e f a cto r s f or t h e e x i s t i n g r o of f r a m i n g a n d i n sta ll a t i on t o l e r a n c e s , t h e c o n n e c t i o n u s i n g o n e /16? d i a m e t e r l a g s c r e w w i th a m i n i m u m o f 2 % e m b e d m e n t w i ll b e a d e q u a t e a n d w ill i ncl ud e a s uf f i c i e n t f a c t o r o f s a f e t y . 3. C o n s i d e r i n g t h e w i n d s p e e d , ro of s l o p e s , s i z e a n d s p a c i n g o f f r a m i n g m e m b e r s , a n d c o n d i t i o n o f t h e roof , t h e p a ne l s u p p o r t s s h a ll b e p l a c e d n o g r e a t e r t h a n 7 2? o n ce n t e r s . 4. P a n e l s u p p o r t s c o n n e c t i o n s sh a l l b e s t a g g e r e d t o d i s t r i b u t e l o a d t o a d j a c e n t f r a m i n g m e m b e r s . B a s e d on t h e a b o v e e v a lua ti o n , th is off i ce certifies th a t w i th t h e ra ck in g a n d m o u n t i n g s p e cif i e d , the e x i sting ro o f s y s t e m will a d e q u a t e l y s u p p o r t the a d d i ti on a l l oa d i ng i m p o s e d b y t h e s o l a r s y s t e m . T h i s e v a l ua t i o n is in c o n f o r m a n c e w i th t h e 2 0 1 9 C a l i f or n i a B uil d i n g C o d e , c ur r e n t i n d u s t r y s t a n d a r d s , a n d is b a s e d o n i n f o rm a ti on s u p p l i e d t o us a t the t i m e o f th i s r e p ort. Should you have any questions regarding tha above or if you require further information do not hesitate to contact me. truly yours, r £ A 0 , Q - Scott E. Wysslig§, PE California License N ve 2215 N Freeman St 12/27/22