What is the easiest way to build a 2x8, 16" o/c, 4/12 pitch, roof system over a slab that is supported by only 4 4x6 posts and 2 4x10 glulams, while the other end of the patio roof system is supported by a 2x10 ledger board that is attached to the house and the 2x8 rafters with metal ties.