Glossary


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1) Box girder crane

An overhead traveling crane that utilizes a "box" configuration in fabricating the bridge girder.  This box girder design incorporates a four-sided box with a running surface plate for the hoist trolley attached to the bottom of the box.  The advantage of the box girder is that it possesses greater loading capabilities and is able to span greater bridge distances. Generally utilized in pairs with the hoisting mechanism operating on rails attached to the top of each box girder.

2) CMAA

The Crane Manufacturers Association of America, Inc. (CMAA) , an independent trade association affiliated with the United States Division of Material Handling Industry. The voluntary association of CMAA members has existed since 1955. Member companies represent industry leaders in the overhead crane market. Contact: CMAA 8720 Red Oak Blvd., Suite 201 Charlotte, NC 28217 Phone: (704) 676-1190  Fax: (704) 676-1199 Hal Vandiver, Managing Director hvandiver@mhia.org

3) Crane Association

The Crane Manufacturers Association of America, Inc. (CMAA) , an independent trade association affiliated with the United States Division of Material Handling Industry. The voluntary association of CMAA members has existed since 1955. Member companies represent industry leaders in the overhead crane market. Contact: CMAA 8720 Red Oak Blvd., Suite 201 Charlotte, NC 28217 Phone: (704) 676-1190  Fax: (704) 676-1199 Hal Vandiver, Managing Director hvandiver@mhia.org

4) Crane Manufacturers

As applies to Members of the Material Handling Industry of America (MHIA), this term usually applies to manufacturers of overhead traveling cranes, jib cranes, stacker cranes, and gantry cranes to the exclusion of mobile cranes, tower cranes or devices otherwise referred to as construction cranes.

5) 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.

6) Double leg gantry

An overhead traveling crane designed so that the bridge carrying the trolley or trolleys is rigidly supported on two or more legs moving on fixed rails embedded in the floor (via end trucks attached to the bottom of each leg) or on wheels.

7) 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.

8) 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.

9) Festoon

A configuration of small trolleys, support track, and electirical cable utilized to provide power to material handling devices while keeping the power cable out of harm's way.  The cable is looped or "festooned" by attaching to trolleys supported on a track. Thsi arrangment allows this cable to be "bunched" in an accordian-like fashion so as to keep the cable from becoming entangled in the movement pattern of the device it serves. Often utilized to "stretch" cable across the bridge of an overhead traveling crane.

10) Gantry crane

A crane similar to an overhead crane except that the bridge for carrying the trolley or trolleys (with lifting device) is rigidly supported on two or more legs running on fixed rails or other runway.

11) 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.

12) Overhead travelling 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.

13) Push type crane

An overhead traveling crane whose horizontal travel is powered manually or by the operator.  Often work station cranes are push type cranes.  This crane may or may not utilize powered hoist or lifting mechanisms.

14) Single girder crane

An overhead traveling crane that utilizes a single bridge beam attached to the two runway/end trucks.  This bridge beam or single girder supports a lifting mechanism or hoist that "runs" on the bottom flange of the bridge beam.

15) Top running crane

An electric overhead traveling crane having the end trucks supported on rails attached to the top of the crane runways.