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Stair lifts have a lift that will bring you up stationary stairs. Escalators are where the stairs themselves actually move up or down.
The walk, use the stairs, the elevators, and the escalators.
A stair elevator is best described as a residential elevator installed directly next to a set of stairs. Escalators can also be considered stair elevators since they are stairs that move floors like and elevator.
Walk instead of driving; climb stairs instead of taking elevators or escalators. Eat less.
Elevators don't look like stairs.
because they don't use electricity unlike escalators (despite their fun for riding up and down on) and elevators (also fun to ride).
Yes, in certain ways. Financially, practically, and safety-wise (legally), yes. Physically, no, as you could make a building that tall without elevators, but it would be hard to ascend to the top using just the stairs and/or escalators.
stairs
you buy elevators in the build section where you buy the stairs.
elevators and stairs
Using an elevator doesn't make you tired, unlike stairs.
elevators were invented to help people get up and down insted of having to use stairs