High Quality Content by WIKIPEDIA articles! A steam crane is a crane powered by a steam engine. It may be fixed or mobile and, if mobile, it may run on rail tracks, caterpillar tracks, or road wheels. It usually has a vertical boiler placed at the back so that the weight of the boiler counterbalances the weight of the jib and load. They were very common as railway breakdown cranes and several have been preserved on heritage railways in the United Kingdom. A crane is a lifting machine, generally equipped with a winder (also called a wire rope drum), wire ropes or chains and sheaves, that can be used both to lift and lower materials and to move them horizontally. It uses one or more simple machines to create mechanical advantage and thus move loads beyond the normal capability of a human. 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.
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