Do you only need to use the crane occasionally for the transportation of materials under five tons? If so, you will probably only  require an overhead industrial crane with a single hoist configuration (which will be cheaper). Yet, if you want to manage heavier payloads, you will most likely necessitate a more robust crane, such as one with a 30-ton double girder bridge. In the United States, overhead cranes are differentiated per the specifics of the Crane Manufacturers Association of America and come in six different classes per their maximum load capacity.