I'm closing in a space beside my garage. On the one side are the posts and the other the garage wall. I am running 2x8 between the two. I have a bracket that will fit on top of of the posts and the 2x8 will go through that and "hang over." I don't know how to figure the angle of the other end that will fit in a metal joist hanger and attach to a 2x8 on the garage wall.
Seems like there should be an easy way to figure it, but I'm stumped by my lack of construction knowledge.