http://www.woodendesignplans.com/sheds Next is the shed roof framing. It is best to assemble the trusses on the ground and check their measurements before erecting on top of the wall structure. Just be careful to measure properly, insure a proper fit, then fasten them in place. Once your roof framing is in place, it is now time to place the roof sheathing on top of the roof trusses. Insure a proper fit, and then fasten them in place. ind out more in http://www.woodendesignplans.com