Single Girder Gantry Crane

A single girder crane has only one bridge beam, and the hoist trolley operates or travels on the lower flange of the bridge girder. · A double girder crane will have two bridge beams, and the hoist trolley travels on rails, usually attached to the tops of the crane girder.A Single Girder Bridge Crane is a type of overhead crane. It feature end trucks that operate on fixed rails attached to the top flange of runway. The hoists are underhung and ride on the lower flange of the bridge beam.A Double Girder Bridge Crane is a type of overhead crane. It feature end trucks that operate on fixed rails attached to the top flange of runway girders or beams.