ingle Girder overhead crane has the advantages of rational structure and strong rigidness of whole unit which will be used together with electric hoist in the operation. They are applicable to the transfer assembly, check and repair as well as load and unload at mechanic processing workshop, subsidiary workshop of metallurgical mills, warehouse, goods yard and power station. They can also be used instead of common double-girder overhead crane at production workshop in light textiles or food industry.