When purchasing or hiring a bridge crane, there are a number of things to take into consideration. Here’s an overview of what you need to bear in mind, together with a brief comparison of the different types of bridge cranes that are available.
Key Considerations When Hiring or Purchasing Bridge Cranes
Your first consideration when hiring or purchasing a bridge crane is what bridge capacity and span you require. You’ll also need to think about how long the runway travel will be and how high you need the hoist to lift. Will the bridge be supported by a building or must it be self-supporting?
Are you going to use the crane indoors or outdoors, and how much work will you expect it to do? Do you require the crane to be motorised, push-pull, hand-geared or a combination of these things? If the crane is to be motorised, you will need to decide how fast you want the operating speed to be, and whether you want the controls to be remote, separate track or pendant from the hoist.
Overhead Travelling Bridge Crane
This type of bridge crane operates via an elevated runway system that fits along the length of a building. Overhead bridge cranes are available in double girder and single girder arrangements and operate on a three axis of hook movement. This set-up allows flexibility so that fragile loads can be placed very gently.
Although the general premise of a gantry crane is the same as that of a bridge crane, operation is slightly different. Gantry cranes are supported by two A-frame steel legs that rest on the ground. The legs have casters so that the crane can be mobile.
Gantry cranes are usually less expensive to buy than overhead bridge cranes.
Jib cranes are popular where operations require very specific lift application. Jib cranes are usually permanently installed over a particular workstation area, mounted on the ground or wall-hung. Different types of jib cranes are available for different applications and headroom requirements.