Just a note .. from Wikipedia
Corrugated galvanized iron ((the wikipedia link spells it
galvanised. Go figure)
The corrugations are described in terms of pitch (the distance between two crests) and depth (the height from the top of a crest to the bottom of a trough). It is important for the pitch and depth to be quite uniform, in order for the sheets to be easily stackable for transport, and to overlap neatly when making a join. Pitches have ranged from 25 mm (1 inch) to 125 mm (5 inches). It was once common for CGI used for vertical walls to have a shorter pitch and depth than roofing CGI. This shorter pitched material was sometimes called "rippled" instead of "corrugated". However nowadays, nearly all CGI produced has the same pitch of 3 inches (76 mm).
Just seems to me that with phrases like "have ranged" and "once common" along with that pitch having ranged from 1 inch to 5 inches .. you should have a pretty wide field as long as the corrugated metal sheet is from 'back when' and not a recent building.
Just to add to that,
from trawling my memory I seem to remember 'Big 6' corregated, possibly asbestos sheet, in the 60s here in (sometimes) sunny ole south Devon,
There was also definitely in Asbestos, an industrial size corrugation, ex government (UK) with aternate 9"? wide flats & 5-6 inch corrugations in curved sheets for possibly Aircraft Hanger application, 30-35ft Radius curve, I worked a small Coles crane INSIDE one, although that might have been an American contribution to the war effort
