On top of my shed goes a simple gable roof. I plan to call around to see about prefab roof trusses, not that I expect anyone to stock them in shed sizes, and I don't expect a custom run of 9+2 units to be cost-effective. I already asked Tuff-Shed; they don't sell components, just sheds. I'll probably just build my own, since I've done that before and had very good results.
My question today, though, is how to extend the roofline to form an overhang beyond the end gable truss. I'm trying to remember how it was done back when I was in construction (I wasn't a framer). I think they used a sort of flying rafter arrangement, basically rake boards nailed to the overhung roof sheathing, then nailed to the ends of the fascia boards at the bottom. Am I remembering wrong? I can't quite visualize how such a thing could carry its roof load without sagging.