Dec 30, 2005 · Fig. 3 Overhead Crane. crane, overhead: a crane with a single or multiple girder movable bridge carrying a movable or fixed hoisting mechanism and traveling on an overhead fixed runway structure (see Fig. 3). crane, polar: an overhead or gantry crane that travels on a circular runway.Mar 20, 2017 · Insulation double girder eot crane specifications:Capacity:5~50 ton,Span Length:10.5~31.5m,Working Class:A6,Ambient Temperature:-25~50℃, Grab Bucket Double Girder Overhead Crane. Grab overhead warehouse crane is widely used in power station, storage, workshop, and port to load and unload scattered objects.Double girder crane (DG): An overhead traveling bridge crane that utilizes two bridge beams set atop the runway (end) trucks. Generally this type of crane utilizes a top running trolley hoist which moves along the top of the two bridge beams on its own set of trucks/trolley wheels.Dec 16, 2021 · Twill be a 20 ton, double-girder electric overhead travelling crane once again of Condra design, but this time manufactured by BB Cranes at its Cape Town factory. It spans 18,2-metres and can deliver a 12-metre lifting height over a long-travel distance of 40 metres.