Demag was a German heavy equipment industrial group whose individual companies are now scattered. The Demag name can be today found for example as the Demag Cranes and Components and Sumitomo (SHI) Demag.
Demag Overhead crane and hoist (device) Demag Bridge Crane.
Crane built by Demag in 1935
Example of steam powered overhead crane from 1875, produced by Ludwig Stuckenholz AG, Wetter an der Ruhr, Germany. Design developed by Rudolf Bredt from an original installation at Crewe railway works
Circa 2010 Double girder top running Demag bridge crane operated via radio control. Radio control is often used when handling steel coils.
An overhead crane, commonly called a bridge crane, is a type of crane found in industrial environments. An overhead crane consists of two parallel rails seated on longitudinal I-beams attached to opposite steel columns by means of brackets. The traveling bridge spans the gap. A hoist, the lifting component of a crane, travels along the bridge. If the bridge is rigidly supported on two or more legs running on two fixed rails at ground level, the crane is called a gantry crane or a goliath crane.
An overhead crane, featuring runways, bridge, and hoist in a traditional industrial environment.
Overhead crane at the Skanska precast concrete factory in Hjärup, Sweden.
Gantry-style overhead cranes of the Hainaut quarry in Soignies, Belgium.
A woman operating a 20-ton[which?] EOT crane, 1914
![A woman operating a 20-ton[which?] EOT crane, 1914](https://upload.wikimedia.org/wikipedia/commons/thumb/0/06/Woman_driving_20_ton_O.E.T._crane_%2815402565322%29.jpg/640px-Woman_driving_20_ton_O.E.T._crane_%2815402565322%29.jpg)