Maybe Behlen they made some galvanized stuff I think as well as metal corncribs.

Or perhaps Martin Steel. It looks pretty similar to a Martin all metal building I tore down in 2001. This was the biggest piece of junk building ever made. Not sure if it was military surplus or just a poor design but it sweated terrible on the inside and literally rusted away as the structure was designed to hold moisture instead of having the channels welded where the moisture could drain out of them.

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