Double Girder Overhead Cranes can be offered for a very large range of spans, large range of heights of lift as well as a large number of speeds. They can also be provided with multiple hoisting trolleys running on the same bridge.  Double Girder Overhead Cranes can be offered for a very large range of spans, large range of heights of lift as well as a large number of speeds. They can also be provided with multiple hoisting trolleys running on the same bridge.