Gantry & Semi Gantry Crane is a crane built atop a gantry, which is a structure used to straddle an object or workspace as shown in the pictures. They are also called portal cranes, the “portal” being the empty space straddled by the gantry. Gantry cranes are to run on rails without the need of infrastructure such as runway beams or columns. They can be produced as double girder or single girder as well as overhead crane. There’s a ladder with hand-rails, connected at least to one of the legs, in order to climb the girder.
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