I've been getting adventurous with my fort building lately, but I'm a little confused by how the physics in df works.
If I, for instance, build a huge tower with metal supports as a base and connect them to a lever, would the tower collapse if I pulled the lever? Would I only need to disable a few to make the tower crumble? Or all of them? A basic idea of what I'm thinking, only with the supports a few levels up:

Attached on the side will be a few peripheral towers, if I disable the supports, will those towers hold up the main one? Or will the game calculate the sudden mass of the "hanging" tower and cause attached structures to crumble? I think the latter is unlikely, that the peripheral towers will hold up the tower, no matter how big it is. I've heard you can make up-side-down pyramids with df, so I wouldn't be surprised if the physics part of the game allowed for such an occurrence.
My idea behind this fortress is that I want to create a huge tower which can collapse for people who explore it in adventure mode. If you're too greedy, pull one too many levers and step on one too many pressure plates, you'll realize that the tower you're in is slowly losing pillars to support it.
So can anyone suggest some ways for this to work? I've not really explored the physics of fortress building - if I make an upper level collapse, how much damage will I expect on the floors below it? Will it just take out the immediate floor below? Or could it potentially destroy the whole tower, if just a single floor collapsed? How much time would a player have to act when the tower starts collapsing?
Actually, I haven't even tried disabling supports yet. I noticed you can link them to levers, so I assume you can turn them off and rob a tower of support, but would that be enough to take it down? Would the game even realize that the supports are gone? Could you create a castle in the sky, so to speak?