My main trusses are 44' (24" oc) with 12" over hangs...I have a 16' ceiling so I could put a loft in the back corner. The main building is block and the 26' wide annex is stick built with an 11'-6" ceiling. It's 70' wide across the front.
Trust me when I say build it bigger then what you think you need, there is never enough room!
Mike B
