The most common size here is 18' diameter. "Governemnt bins" homestead act or something. 12', 18', 21', 27', 42'...
Careful taking down. Get many hands. They go back up quickly. Number each panel clockwise (1a, 1b, 1c...6a, 6b, 6c). Makes your life easier when bolt holes line up.
I've set one up last year for a buddy as a poor man's quonset. The roof can easily become endwalls if desired for low tech apps.
If short on hands, a front end loader is handy.
Don't bother reusing the hardware.
They make great temp or (if you shoot on mesh with 16 gauge staples or use roofing screws) big permanent arch formwork for thick walls. I have one between plaster and a 14' earthbag arch
Corrugated profile wins structurally over ribbed all day long. The older corrugated panels are also much thicker. Know that if you are pushing the material hard.