Interesting thread. I don't know the answer to the question, but have decided for my shop that I can save money by going longer for square footage instead of wider. My best price seems to be in the 32 foot width with wood trusses every 4 feet so I can put metal on the ceiling and blown in insulation. The main work shop will be 48 feet deep, but then I will add two more 48 foot long sections to it over time. For storage, there will be a lean-to on each side the full length of the building. Except for concrete, I plan on doing all of the work myself, which is also why I'm designing it this way. I will only concrete the first 32x48 section and gravel the others as I build them for tractor and implement parking.