In response to this post:

I just asked one of the maintenance men who comes into the lab how elevators get into elevator shafts. He said “piece by piece. Which is how I took ’em out last year.”

So craftsment assemble the elevator in the shaft. And they disassemble them in the same way.

He also told me what they’re going to do with the old shaft, and also explained what is in the addition they built at the back of the building last year.

Which just goes to show that if I want to learn something, I should keep asking until I find someone that knows the answer.