Inspiration

[tomustang]

How far can I stretch the time period of my layout?

How about the transition period (e.g. 1952)?

1. Did the "box building" as put on my layout already exist at the time?
2. Did industry parks already exist at that time?

It's hard to specify the timeline, but must industrial places I've worked at got build in the 60-70's and they were all "box buildings", square concrete block foundation a few feet off the ground/sheet metal sidings. Size ranged from small and large buildings

The others, were brick factories and the time ranged from 1890's to 1950's


I know that corrugated metal buildings from top to bottom started around the 1890's I believe

Your 'box building' however looks like concrete wall all around and they were around more recently.




Now this wouldn't be a direct answer but it should give some clues