An elevator or lift is a vertical transport vehicle that efficiently moves people or goods between floors of a building. They are
generally powered by electric motors that either drive traction cables and counterweight systems, or pump hydraulic fluid to raise a
cylindrical piston.Languages other than English may have loanwords based on either elevator (e.g., Japanese) or lift (e.g.,
Cantonese).Because of wheelchair access laws, elevators are often a legal requirement in new multi-storey buildings, especially
where wheelchair ramps would be impractical.Elevator doors protect building tenants from falling into the shaft.