Hammerhead harbor crane

The 3D model of a Hammerhead harbor crane is often called simply a 3D "hammerhead", or 3D giant cantilever. This 3D Hammerhead harbor crane is a fixed-jib 3D 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. So, 3D Hammerhead harbor crane are generally constructed in large sizes, up to 350 tons.