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There are also lobbies where you choose an elevator for a specific range of floors. I wonder if that's a legacy solution and what you're describing has become t

There are also lobbies where you choose an elevator for a specific range of floors. I wonder if that's a legacy solution and what you're describing has become the new standard.

grishka 3y ago
I've seen that in several buildings in Dubai. Considering that most of Dubai was built since around 2000, these kinds of advanced elevator controllers should've been available when at least some of these buildings were planned and built. So no, probably not legacy. Maybe those hall-floor-selector systems are simply much more expensive. Or maybe they only make sense when you need a really high throughput.
Cthulhu_ 3y ago
Both work, but I think the range elevators simply have no exits for the unsupported floors and can go high speed to the first supported elevator. They probably do have exits though, in case another elevator breaks down. Taller buildings will require you to transfer to a different elevator once you've reached a certain floor; one because else you get cables that are hundreds of meters long (with the weight to match), and two because else you'll need more elevators and -shafts to service all hundred+ floors in a timely fashion, which takes up real estate / floor space.
- bewaretheirs 3y ago
  > They probably do have exits though, in case another elevator breaks down. Floor space is generally too precious for that. In a typical multi-bank elevator setup, lower floors get their toilets or other utility spaces placed between two banks of elevators that don't stop at that floor; the corresponding point in the upper floors is the elevator lobby for an upper-floor elevator bank. There's a widely reported story that a group of people stuck in an elevator in the WTC on 9/11/2001 used a window washer's squeegee to cut their way through multiple layers of drywall to escape into a 50th floor bathroom.

There are also lobbies where you choose an elevator for a specific range of floors. I wonder if that's a legacy solution and what you're describing has become the new standard.

grishka 3y ago

I've seen that in several buildings in Dubai. Considering that most of Dubai was built since around 2000, these kinds of advanced elevator controllers should've been available when at least some of these buildings were planned and built. So no, probably not legacy. Maybe those hall-floor-selector systems are simply much more expensive. Or maybe they only make sense when you need a really high throughput.

Cthulhu_ 3y ago

Both work, but I think the range elevators simply have no exits for the unsupported floors and can go high speed to the first supported elevator. They probably do have exits though, in case another elevator breaks down. Taller buildings will require you to transfer to a different elevator once you've reached a certain floor; one because else you get cables that are hundreds of meters long (with the weight to match), and two because else you'll need more elevators and -shafts to service all hundred+ floors in a timely fashion, which takes up real estate / floor space.

bewaretheirs 3y ago
> They probably do have exits though, in case another elevator breaks down. Floor space is generally too precious for that. In a typical multi-bank elevator setup, lower floors get their toilets or other utility spaces placed between two banks of elevators that don't stop at that floor; the corresponding point in the upper floors is the elevator lobby for an upper-floor elevator bank. There's a widely reported story that a group of people stuck in an elevator in the WTC on 9/11/2001 used a window washer's squeegee to cut their way through multiple layers of drywall to escape into a 50th floor bathroom.