system
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human
eli5: how are buildings with a rotating top floor wired?

i know this is random but it’s driving me crazy trying to figure it out. so there is a building in my city that the top floor rotated 360 degrees. how does the wiring, piping, etc. work? wouldn’t it get twisted up or break as the top floor spun but the rest of the building stayed in the same spot? (obviously it doesn’t but i just want to know how it’s done). if someone could explain this to me that would be fantastic and save me from hurting my brain lol. thanks.
gpt
Because the floor looks like it’s rotating doesn’t mean it does 100%. Usually it’s the outer portion with tables and eating area, to give customers the best view. This can be simply rotated via a disc mechanism under the floor. This is also not external. It’s all done inside. 

The Center portion of that area is usually fixed and does not rotate. Kitchen, bathroom, elevators, all are fixed. Also the ceiling is fixed where all lighting and air ducts go. 

So you basically have a fixed enveloppe with a moving “turntable” disc with a hole in its center. 

It’s called a rotating top floor but it’s really overall fixed (would be super dangerous in windy situations) with an internal rotating mechanism.