Section 3.4
Overhead and Gantry Cranes
Glossary
Cantilever Gantry Crane: A gantry or semi-gantry crane in which the bridge girders extend transversely beyond the crane runway on both sides.
Chain Sprocket or Drum Groove: Grooved or notched wheel that the hoist rope or chain is seated.
Crane: A machine used to raise, lower or move a load horizontally.
Engineered Lift: A test load that has been identified and evaluated for use in determining the lifting capacity of the hoisting equipment.
Gantry Crane: Similar to an overhead crane, except that the bridge for carrying the trolley or trolleys is rigidly supported on two or more legs running on fixed rolls or other runway.
Load Block: The assembly of hook, shackle, swivel, bearing, sheaves, pins, and frame suspended by the hoisting rope and used to attach the load to the hoisting cable or chain.
Main Line Disconnect: The controller used to isolate power to the hoisting equipment.
Overhead Crane: A crane with a movable bridge carrying a movable or fixed hoisting device that travels on a fixed runway.
Semi-gantry Crane: A gantry crane with one end of the bridge rigidly supported on one or more legs that run along a fixed rail or runway, the other end of the bridge supported by a truck running on an elevated runway or rail.
Tower Crane: A vertical crane with a horizontal boom. The boom is balanced asymmetrically across the top of the tower. Its short arm carries a counterweight while the long arm carries the lifting gear.