The device uses one or more simple machines to create mechanical advantage and thus move loads beyond the normal capability of a human. It is mainly used for lifting heavy objects and transporting them to other places. ![]() Manual crane from the late 19th century used for unloading small loads (bales, crates, etc.) from ships at the Port of Barcelona, SpainĪ crane is a type of machine, generally equipped with a hoist rope, wire ropes or chains, and sheaves, that can be used both to lift and lower materials and to move them horizontally. JSTOR ( November 2011) ( Learn how and when to remove this template message)ĭiagram of a modern crawler crane with outriggers.Unsourced material may be challenged and removed. ![]() Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.
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