Electric overhead travel crane Overhead Crane, is commonly known as single girder overhead cranes. The hoist trolley of overhead cranes works under the part of the main girder, rail is usually bottom flange plate of I-beam or welded small box girder, and the main girder is the type of single-beam. Compared single girder Overhead Crane, compared with double beam Overhead Crane, is mainly applied to small weight, small span and slower speed workplace.
