Hi, I have been wanting to cover my back patio for a while now, and I want to do it right. My goal is to leave the patio as open to the yard as possible without ruining the integrity of the structure. The concrete pad is 30' wide and 8' deep, and I will setting new footings. I would like to frame a cross gable and tie into the existing roof, and shingle it to match.
Here is my plan:
I would like to use only a 6x6 post on each side with a 4x6 beam running back to the brick and top plate behind the eaves. Then run 2x6 rafters 16" OC. On the end gable I plan on adding a rafter tie somewhere high withing the bottom 1/3 of the rafters and adding supports. With the same idea as a truss. I don't know what that is called but I have it in the drawing.
1. Will 6x6 pine be enough for posts?
2. Are 4x6 beams overkill or not enough?
3. Will the "gable truss" keep the posts from spreading. I am thinking about doing one on the end and another a few rafters back, in the center.
There are many more questions but these are the most important. Does anyone see any mistakes, please, let me know what you think. Any addtional advice will be welcomed.
Thanks in advance,