I'm planning on building a wooden carport with a lean-to, single slope roof for one car.
The approximate dimensions 3.5 meters or 11.5 feet wide x 5 meter or 16.5 feet long.
The question is, if I could do something like this:
x_____x | <- | x <- | | <- | x_____x
3 posts on the left, 2 posts on the right. The arrow indicates the lean-to downwards direction. I figured this roof configuration would partially relief the right hand structure where there are 2 posts only, relying more on the left hand side where there are 3 posts. Unfortunately I'm also constrained when it comes to the lean-to roof pitch (around 20 degrees). I should also mention I live in a region where it snows in the winter but it not really windy.
Is it reasonable to build such a structure taking under consideration the extra strain added by the winter snow?
What would be recommended wooden beam sections to stay on the safe side?