1. Features

1.1 Definitions

Cranes used in the construction industry fall into three families: GMEs, GMAs and luffing jib cranes, whose installation and use differ according to their characteristics.

• GME (modular cranes)

  Rotation of the rotating part, the boom, is ensured by a slewing ring (or sometimes pivot, figure 1 ) which is placed at the top of the shaft or mast, fixed (or able to move in one direction).

  The GME crane family (figures 1 and 2 ) includes...