The 'hammerhead' crane, also known as giant cantilever, is a fixed-jib crane consisting of a steel-braced tower on which revolves a large, horizontal, double cantilever; the forward part of this cantilever or jib carries the lifting trolley, the jib is extended backwards in order to form a support for the machinery and counter-balancing weight. In addition to the motions of lifting and revolving, there is provided a so-called 'racking' motion, by which the lifting trolley, with the load suspended, can be moved in and out along the jib without altering the level of the load. These cranes are generally constructed in large sizes.
Originally hammerhead cranes were developped for use in British shipyards. Later on they were installed and became popular in naval shipyards in Japan and in the USA, Australia and Singapore. Now they are used worldwide.
This hammerhead harbor crane model will become a great addition to any harbor or construction visualization.
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