We had a false alarm go off in the building where I work last week. The elevators automatically shut down forcing the use of the fire escapes. The building is 22 floors. I was lucky in that I’d just taken the elevator to the first floor to step outside on a break. When they finally let us back in, I wondered what someone with mobility issues is expected to do had the building been on fire. Just die? Have a kind soul carry them? With most people wfh at least a couple of days per week, this seems really dangerous for anyone who might get stranded.
In my workplace, there are a few options: When a disabled person is on a certain floor above ground floor, there will be a special chair they can be put in, that allows one person to maneuver them down the fire escape. Multiple people in the company are trained on the use of this contraption and are notified before the evacuation is necessary.
When there are more wheelchair bound people in the building than there are evacuation chairs available, they’ll have to be taken to the fire escape behind double fireproof doors, where the area is pressurized with clean air. There the firemen will evacuate them.
A third option is the area where the elevators are. It closes automatically and has a fireproof door where you can wait in front of the elevators for the firemen to evacuate you using the elevators (or otherwise).
Normally there aren’t that many wheelchair bound people in the building that need those chairs, because visitors are normally confined to the ground floor. On a floor where a disabled person used to work (now retired), one of those chairs was permanently available.
Edit: the ones we have resemble these https://evac-chair.com/