Hello, I am working on plans for a garage and I have added my trusses (with a 15 1/2" heel and no overhang) but I am having problems figuring out how to manually add overhangs on top of my trusses. I want the overhang on top as I am putting my purlins on top of my trusses and not in between them. Is this possible and if so, how do you do it?