GANTRY CRANES

Gantry / Goliath Cranes are adapted to applications where overhead runways would be very long, costly to erect, and difficult to maintain in alignment. Where the installation is only temporary, a gantry crane can be moved to a new location with less trouble or expenses than an overhead crane and its runway. Also it is comparatively easy and inexpensive to extend the length of the runway and thus increase the working area of the crane.

Most gantry crane installations are outdoors. The initial cost of a gantry crane may be more than that of an overhead crane, but it must be equated against the additional cost of an overhead runway.

“GRIP” range of gantry cranes can be broadly classified into the following categories:-

• Deck-Leg Gantry-Most commonly used type. Both tracks are on ground level and the trolley travel between the legs only. ‘GRIP’ cranes are available upto 250T capacity.
• Through-Leg Gantry-Used in conjunction with a cantilever girder extension on one or both ends of the Bridge Girder. Such construction permits handling loads outside the area bounded by the runway rails. Load may or may not be carried through the leg.
• Semi Gantry- Construction is possible for both the Deck-Leg and Through-Leg type. These Cranes have legs of unequal length to operate on rails at different elevations.
• Bridge Building Gantry – This design allows handling of segment in front of the crane where no rails are available initially. However once segment is placed ahead, then rails are laid for the crane to travel for next similar handling, thus making a Bridge. Also the longer loads can be rotated in the Cantilever section of the Crane.
• Portal Gantry – This design allows handling of loads perpendicular to Crane travel, facilitating loading and un-loading on vehicles placed outside the Crane Bay.

All these cranes are available in Single Girder, Double Girder as well as Offset Crab Monobox design and are custom made to suit customer’s specific requirement.

These type of cranes are widely found in the following applications :-

1. Ports
2. Container Handling
3. Construction sites
4. Marble / Granite Industry
5. Stockyards
6. Scrap yards
7. Railway yards