I hope someone can help me, I have about a 20-foot wide patio that is pitched out about 11 feet. I had three 4x4 posts and I am eliminating the center one, so I need a new header. The current headers are two 2x6x16 and two 2x6x4 if that makes sense. Butted and overlap so 16 and 4 and 4 and 16...