A crane is a lifting machine that can be used both to lift and lower materials and to move them horizontally. Cranes are commonly employed in the transport industry for the loading and unloading of freight, in the construction industry for the movement of materials and in the manufacturing industry for the assembling of heavy equipment.
The lifting capability and stability are two major factors when choosing cranes. Cranes can be divided into mobile cranes and fixed cranes. Common mobile cranes include truck-mounted crane, side-lift crane, rough terrain crane, all terrain crane, crawler crane, railroad crane, floating crane, and aerial crane. Common fixed cranes include tower crane, self-erecting crane, telescopic crane, hammerhead crane, level luffing crane, gantry crane, overhead crane, deck crane, jib crane, bulk-handling crane, loader crane, and stacker crane.