1) Crane Manufacturers Association of America (CMAA) Industry Group
CMAA is the Crane Manufacturers Association of America, Inc., an independent trade association affiliated with the Material Handling Industry. CMAA traces its roots to the Electric Overhead Crane Institute, known as EOCI, which was founded in 1927 by leading crane manufacturers of that time to promote the standardization of cranes as well as uniform quality and performance. The voluntary association was incorporated as the Crane Manufacturers Association of America, Inc. in 1955. Member Companies, representing the industry leaders in the overhead crane industry, serve the United States market from operations based in the United States, Canada, and Mexico.
2) Electric overhead crane
A crane with a single or multiple girder (bridge girder) bridge carrying a movable or fixed hoisting mechanism and traveling on an overhead fixed runway structure with all or most movements powered by electric motors.
3) Electrification
The track mounted conductor system by which the moving equipment receives its electrical power. All of the electrical components that go into providing power to an electric overhead crane or jib crane. These components may include power bar, collectors, collector rings, pendent stations, and tagline/festooning.
4) Top running crane
An electric overhead traveling crane having the end trucks supported on rails attached to the top of the crane runways.
5) Underhung crane
An electric overhead traveling crane having the end trucks supported on track attached to the bottom flanges of the beam; or supported on bottom flanges of beams. These beams make up the crane runway.
6) Under running crane
An electric overhead traveling crane having the end trucks supported on track attached to the bottom flanges of the beam; or supported on bottom flanges of beams. These beams make up the crane runway.