My son wants to build a glass overhang to protect the small deck on his house that leads to the front door from the elements. The overhand will be about 8 feet wide and sloped from the house.He plans to use 8X 8 cedar posts on 8 ft centres supporting a 4X 12 cedar beam. He will then use 2X10 cedar planks to support the glass panels(4X8 tempered glass). He is concerned if the 4X12 (full size) will be strong enough to support an 8 ft. span. Also is there a website to supply material to seal the glass on the rafters?

Thanks for any help.

Regards

Fred