steel plant crane 4 beam overhead crane
A bridge crane, sometimes called an overhead bridge crane, is a type of crane with a movable bridge that runs on elevated beams suspended overhead. This allows a load to be moved in three axes to and from any point in the crane’s operating space. In addition to the bridge, a bridge crane system includes a trolley and hoist that can move across the length of the bridge, and elevated beams, known as the runway, over which the bridge moves forward and backward. The trolley moves from side to side across the bridge, perpendicular to the direction of motion of the bridge, carrying with it the hoist, which can be raised and lowered from the floor to position the load at varying heights.Bridge crane design allows multiple configurations to accomplish this movement. The two main categorizations are top-running versus under-running bridge cranes and single-girder versus double-girder bridge cranes. This allows four general configurations: single-girder top-running, double-girder top-running, single-girder under-running, and double-girder under-running bridge cranes.
