Overhead cranes are immensely popular for heavy weight lifting and the lower cost gantry cranes are hugely acknowledged. These are considered a substantial alternative to the overhead bridge cranes. These types of cranes are similar to the bridge crane only with a difference that it runs on a track on the floor or ground level not on an elevated runway. The bridge of gantry is sustained by a pair of tough steel legs which are carried by a pair of end trucks along the floor runway. Such cranes are accessible as both indoors and outdoors in spans to 150 feet and capacities to 10 tons.
As gantry cranes are made to ride on the ground, there is no need of runway structure and thus saving on the concrete foundations. The installation procedure for the gantry crane is very simple and swift. On the basis of the environment and application, these cranes can sometimes offer the same material handling potential as a comparable overhead bridge crane system, but with a noteworthy cost savings.
But, in contrast not all gantries will cost less than their counterparts, i.e. bridge cranes. But there are circumstances where these can prove very reasonable and efficient:
1. When the investor is in no mood of putting a major amount in a bridge crane runway structure.
2. When there is requirement for the material handling equipment for the interior and exterior of your building.
3. When there is chance of shifting the workplace and the owner does not want to afford much loss.
Gantry cranes are easily assembled and disassembled, whether mounted or mobile. Gantries are profitably utilized across manifold industries. These Cranes are obtainable in steel, aluminum or a lightweight model along with adaptable heights and spans. Further variations of cranes include: container, overhead, a frame, rubber tire, rolling, semi and rail mounted gantry cranes.
Such type gantries are classified into two categories: manual and motor driven.
• Portable gantry (manual)
• Adjustable gantry (manual)
• Motor driven gantry
Each type has its own benefits which could be easily compared to the benefits offered by the bridge cranes. When we talk about manual gantries as part of your material handling equipment solutions we say that they are lightweight, high expensive with easy of assembling and disassembling. They are said to be more productive and endowed with superlative safety. And in case of motor driven cranes we can eliminate the need of runways and are easily transportable.
Thus we can say that investing in the gantries is not at all a bad deal and thus if the owner does not have much to spend on material handling equipments then these are the best buy for him. Gantry cranes possess all the capabilities and efficiency as enjoyed by the overhead bridge cranes. But before buying gantry one must review his needs and utilization because if in order to see money he invested in gantries and later realizes that his requirement for much bigger cranes like, jib crane then his entire work will be in waste.