A gantry crane is an overhead crane that has two more beams that are supported by legs. These cranes move on wheels, tracks, or rails. Gantry cranes are used widely in workshops, warehouses, shipyards, and railroads. Gantry cranes are designed in a way to carry small loads as well as heavy-duty ones. Read More…
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Gantry cranes are classified as single girders and double girders. The single girders are designed to carry smaller loads and double girders are designed to carry heavy-duty loads. It means, the higher the capacity of the crane, the greater the performance will be.
Gantry cranes are available in a variety of shapes, such as the “A” frame and sometimes with “L” and “U” shaped legs. However, the most commonly used is the “A” shaped one. All gantry cranes are designed to lift light and heavy loads whether they are single girder or double girder. However, double girder gantry cranes are more expensive compared to single girder ones.
The lifting capacity of gantry cranes ranges from a few hundred pounds to several hundred tons. The height of gantry cranes is either fixed or adjustable depending on the type of object to be lifted and the working environment.
Construction of Gantry Cranes
The components of a gantry crane, whether a small one or a huge one, are divided into three categories:
- Mechanical
- Structural
- Electrical
Girders or beams are present in all types of gantry cranes positioned off the floor and parallel to the ground. The girders, frame, and legs are the essential part of these cranes. The legs of a gantry crane can be a straight beam, truss beam, or A-frame. These components differentiate the gantry cranes from overhead or bridge cranes.
Components of Gantry Cranes
Below are the components of the gantry cranes:
Frame
The gantry crane consists of the main girder and its legs, whereas the semi-gantry crane has one leg. The size, length, and number of beams depend on the load’s weight. One side of the leg is rigid, and the other one is flexible to reduce the dead weight of the load.
Trolley
The hoist is moved by the trolley horizontally along the girder or may be attached to the top or underside. The trolleys are of three types: low, normal headroom, and double girder. Some trolleys came with space washers and can be adjusted by adding or removing the washers. The trolley collision can be prevented by using wheel bumpers and side guide rollers to prevent it from wobbling.
Hoist
The hoist is mounted on the trolley to lift and lower the load along the vertical plane. The chain-driven hoist can lift up to five tons of a load, while the wire rope hoist can lift five tons or greater.
Power
A form of wiring called festoon powers the trolley and the hoist. Cables are used to send the power from the panel to the hoist. The power can be direct AC or induction AC.
Controls
The operator gets all the controls of the gantry crane and drives it with the help of remote control or a pendant. It has buttons, levers, or other commanding mechanisms to move the gantry crane.
Types of Gantry Cranes
The types of gantry cranes are divided based on their configuration, design, and weight capacity. These are:
Full Gantry Crane
This type is the normal configuration of the gantry crane with a cross beam, legs, and hoist. These run on wheels, rails, or a track. Depending on the size, these cranes are mobile and portable.
Semi-Gantry Crane
This crane has one leg, and a wall-mounted I beam that supports the other side of the crane. These cranes are a combination of overhead and gantry cranes. These cranes are installed indoors and outdoors, sometimes under overhead cranes, to increase work efficiency.
Portable Gantry Crane
Portable gantry cranes are lightweight and mounted on rubber wheels. The lifting capacity of these cranes is from half a ton up to five tons. These cranes can be moved to any place for lifting purposes.
Adjustable Gantry Crane
There are various adjustable gantry cranes, such as portable or fixed. The dimensions of these cranes can be adjusted according to the load requirements.
Single Girder Gantry Crane
This crane has one bridge beam with a hoist trolley that runs on the lower portion of the crane. Its components are a beam, support legs, hoist, crane drive, controls, and cross beams.
Double Girder Gantry Crane
This crane has two girder beams that make up the bridge, and the trolley runs on the top or under the beam. These are designed for heavy duty applications. These cranes have strong bearing capacity, large spans, and stability.
Truss Gantry Crane
It has a latticed structure, lightweight, good lifting ability. It is best to use in a warehouse for lifting equipment.
Box Gantry Crane
These are placed in areas where overhead cranes cannot work well. These can be double-box or single-box designs. Double-box designs are used for lifting extremely heavy objects.
L-Shaped Gantry Crane
L-shaped gantry cranes have attached hooks that help lift objects and load at seaports or warehouses.
U-Shaped Gantry Crane
U-shaped gantry cranes have more space between the legs and are used for lifting heavy duty loads.
Workstation Gantry Crane
These are industrial cranes with moving bridges that run across parallel runways. These are attached with a hoist, manipulators, or intelligent lifting devices for lifting loads.
Uses of Gantry Cranes
Gantry cranes are widely used in the industrial sector for lifting and placing heavy or lightweight loads. These are used in railroads, automotive manufacturing facilities, or shipyards to speed up the lifting process with ease.
Choosing the Correct Gantry Cranes Supplier
To make sure you have the most constructive outcome when purchasing Gantry Cranes from a Gantry Cranes Supplier, it is important to compare at least 4 Manufacturers using our list of Gantry Cranes suppliers. Each Gantry Cranes Supplier has a business profile page that highlights their areas of experience and capabilities and a contact form to directly communicate with the manufacturer for more information or request a quote. Review each Gantry Cranes company website using our proprietary website previewer to get an idea of what each company specializes in, and then use our simple RFQ form to contact multiple Gantry Cranes businesses with the same form.