Elevators, Dumbwaiters, Escalators
The modern multistoried commercial and industrial building must provide vertical transportation for its occupants and the equipment and supplies they require in order to operate in an orderly, efficient manner. The elevator is not a new invention. In 236 B.C., Archimedes invented a vertical lifting device using a system of ropes and pulleys, and the Egyptians employed hoists to lift some of their 20-ton building blocks when they built the pyramids.
KeywordsGuide Rail Elevator Dimension Machine Room Steel Angle Elevator Shaft
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