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by zachlipton 4393 days ago
Elevators. I mean obviously there are significant structural concerns as well, but elevators are a big part of what makes building super-tall buildings uneconomic and impractical. The Elevator Conundrum, as Wikipedia dubs it (https://en.wikipedia.org/wiki/Skyscraper_design_and_construc...), means that as you build a taller building, you need more elevators to service the floors. More elevators take up more space, meaning less rentable space for occupants. While skylobbies, double-deck elevators, and other tricks can help, they don't eliminate the problem, especially since no one is willing to transfer elevators four times to get up/down. We also run into the issue of how to build a 10,000 foot elevator, which is so far outside the competence of manufacturers that it would represent a huge risk to the completion of the entire building project.

I am, of course, assuming you plan to build a useful tall building instead of an empty 10,000 foot tall shell for no particular reason.

2 comments

The elevator problem is partially solved by never leaving your section of the mega tower!

Work on level 120 Sleep on 73 Recreation on 145 Skyway connections to neighboring mega towers every 50-75 levels.

Actually travelling to the surface world would be akin to driving for hours across the state. It's a trip and would be planned for accordingly, and happen rarely.

>Actually travelling to the surface world would be akin to driving for hours across the state. It's a trip and would be planned for accordingly, and happen rarely.

I must be missing something. 10,000ft is 1.8ish miles. That's like an 8 minute bike ride not a cross-state drive. Even if it took 30 minutes by elevator, that's a reasonable commute in cities like Chicago.

Yea, I went funny with the scale. Jumped straight from skycraper to something the size of a GSV from the Culture series.
The main problem with elevators today is that you can only have on cage per shaft. You could solve this if you could have multiple cages per shaft. A bit like how trains operate with switches and passing points. I imagine that would take some serious technical development but doesn't seem entirely out of this world. It would be easier if you have cableless lifts like the maglev lift Toshiba developed (http://www.toshiba-elevator.co.jp/elv/infoeng/technology/tec...).
Maybe you don't have to pass - just like beads on an abacus string they could oscillate up and down with some overlap. Sometimes your cage might have to pause to let another leave the zone but mostly it could work.