Here is a better example of the different classes in architecture: https://www.landzero.com/post/understanding-property-zoning-a-comprehensive-guide

That looks like a guide on zoning, not on the layout inside office buildings or the age in which they were constructed.

As far as the windows, I don’t know that site and the window requirements, but it’s hard to see what’s going on on the sides. The overhead trusses are easily accessible as well. Maybe, maybe not.

I'm confused. You said this in the prior post:

The class B pic shown in your link would be a perfect candidate to retrofit to housing if it’s unrented.

If you say "its hard to see whats going on" or "maybe, maybe not", why did you say that picture was the perfect candidate?

Don't just take my word for it. Go look up the studies actually performed on Office-to-Residential conversion. There was one that evaluated something like 1250 office buildings in North America. Look up your local building codes for residential apartments. Some Class B are good candidates yes, but I doubt the one pictured is for some of the reasons I cited and more.

I disagree with you on what you think you can do with “Class B” , but I don’t think you’re wrong about anything, if that makes sense.

No, that doesn't make sense to me. I'm no expert in this field. I just read the studies commissioned by the Federal government or articles about those studies. I even replied on Lemmy with this info a few months ago citing those sources. You're welcome to take a look at it for more info here.