Gantry Crane

gantry crane ( twin girder

Gantry crane is a type of overhead crane and one of the fixed cranes' type. But this crane can't move either working or not, it is fixed in its position the supports holding the crane up are fixed in location. Then how it serves weights if it can't move? Well, the weights must come to the crane's operating area. It has a hoist in a fixed machinery house that runs horizontally along rails

The hoist is fitted on one beam for mono girder and two beams for twin girder. On the gantry rail, the crane frame which is supported on gantry system runs forward and backward to lift the weights. Gantry cranes are very common in factories as it moves along certain product assembling line. We can see gantry crane at shipping ports

They are used in loading containers on and off the ships. Because it is fixed at the edge, the trolley or machinery house travels on cantilevered rail at the top of the crane. In the previous case gantry crane can be called container crane.the difference between container and gantry is that container crane can move horizontally while gantry one can't.