Using 2 - 10'6" sections for a hoop would get you just under 13' wide.
Using 3 - 10'6" sections for a hoop would get right about 19' wide.
Sounds like you must be commercial growing with that much space requirement!
I had plans of building 2- 14x25', in hindsight, I think I should have planned to just extend the 25' if more room was needed. Would have saved me on a door, lumber, and the fan/exhaust/wiring setup.
