Elevator

An elevator is a transport device used to move goods or people up and down. Outside North America, elevators are known more frequently as lifts. Other languages may have loanwords based on moreover elevator (e.g. Japanese) or lift (e.g. Cantonese). Because of wheelchair right to use laws, elevators are often a requirement in new buildings with multiple floors.Elevators begin as simple rope or chain hoists. An elevator is basically a platform that is either pulled or pushed up by a mechanical means. A modern day elevator consists of a cab (also called a "cage" or "car") mounted on a platform within an enclosed space called a shaft, or in Commonwealth English called a "hoist way". In the past, elevator drive mechanisms were motorized by steam and water hydraulic pistons. In a "traction" elevator, cars are pulled up by means of rolling steel ropes over an extremely grooved pulley, commonly called a sheave in the industry. The weight of the car is objective with a counterweight. Sometimes two elevators move always synchronized in opposite way, and they are each other's counterweight.

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