Single Girder Gantry Crane

A single girder gantry crane is a gantry crane with a single girder/beam structure. The lifting mechanism is usually a wire rope hoist traveling on the single girder, and the crane traveling on the rail track fixed on the ground/floor.Single Girder Overhead Bridge Cranes. On a single girder crane, the bridge consists of one girder beam supported on each side by an end truck. The trolley and hoist are most commonly underhung—meaning they run on the bottom flange of the bridge. The bridge itself can either be top running or under running in design.Single Girder Cranes generally have no platform for maintenance,or have 2 small platform for LT mechanism maintenance. Double Girder Cranes have both sides platform across the main girders for maintainance purpose and platform for crab maintenance.