Gantry Crane

Gantry cranes are widely used when the lifting is needed without the cost of a building or support steel work. The gantry cranes can be placed indoors or outdoors, used for activities in steel stock yards, pre-cast segment yards, construction sites and other outdoor application.

One or two beam is supported on steel legs, on beam, there is a trolley to lift and move across, and the whole structure seems like a big gate, we call it Gantry Crane. Gantry crane is a variant of bridge crane. Gantry cranes are widely used when the lifting is needed without the cost of a building or support steel work.

Double girder gantry crane with cantilever

Applications of gantry cranes

This gantry crane is working by traveling rails on the ground, mainly used in open-air storage yard, docks, power plants, ports and railway stations and other places for cargo handling and installation operations.
Gantry crane hoisting mechanism, trolley traveling mechanism and bridge construction, are basically same with bridge crane. Because of long span, gantry crane are usually used by respective driven way to prevent the crane producing skewed running and increasing the resistance, and even accidents.

It is mainly used for the loading and unloading operations of freight yards, yard goods, and bulk cargoes. Its metal structure is like a gantry frame, bearing two feet under the main beam, and can directly walk on the track of the ground. Both ends of the main beam can have an outrigger cantilever beam. The gantry crane has the characteristics of high site utilization rate, large operating range, wide adaptability and strong versatility and is widely used in the port cargo yard.

Advantages of  gantry cranes

• Gantry cranes with the runway located on the floor can be used where the overhead crane or bridge is not practical.
• Gantry cranes are more cost-effective comparing with the overhead crane system.
• Types of gantry cranes have a wide application. Gantry can be used indoors and outdoors. Gantry cranes can be used when the existing factory structure which cannot bear the wheel loads of the overhead crane; or loads needs to be handled outside the crane span and when the relocation of the crane is required after the work at a certain site is completed.

Gantry crane offerings of Dongqi Crane

Dongqi Crane can provide a complete range of gantry cranes, i.e. full gantry cranes, semi-gantry cranes and portable gantry cranes, including, single girder, double girder, single leg, double leg, and cantilever styles for indoor or outdoor service. The capacities, spans, heights can be customized.

Comparison of types of gantry cranes

Dongqi Crane can provide a complete range of gantry cranes, i.e. full gantry cranes, semi-gantry cranes and portable gantry cranes, including, single girder, double girder, single leg, double leg, and cantilever styles for indoor or outdoor service.

Full gantry crane vs. Semi gantry crane

First, normally, gantry cranes are divided into full gantry crane, semi-gantry crane, gantry crane with cantilever, gantry crane without cantilever. Their functions are as below:

• Full-gantry crane: The main beam has no overhang, and the trolley is carried out within the main span.
• Semi-gantry cranes: The height difference of the legs can be determined according to the site construction requirements.

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  Full gantry crane ,box girder, double girder gantry crane
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  Semi- gantry type, box girder, double girder gantry crane
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  Full gantry crane, box girder, single girder gantry crane

Double girder gantry crane vs.Single girder gantry crane

Double girder gantry crane vs. Single girder gantry crane

The most common form of double girder gantry crane structure, its structural force and the effective use of the site area are reasonable.Double girder gantry cranes have strong bearing capacity, large span, overall stability, and many varieties, but their own quality is larger and their cost is higher compared with single-girder gantry cranes with the same weight. According to the different main beam structure, it can be divided into two forms of box beam and truss. At present, generally more box-shaped structure.

Single girder gantry cranes of structure is often chosen by site constraints.The single girder gantry crane has a simple structure, is easy to manufacture and install, and has a small mass of its own. The main beam is mostly an off-track box-shaped structure. Compared with double-girder gantry cranes, the overall stiffness is weaker. Therefore, when the weight Q≤50t and the span S≤35m, this form can be used. Single-gantry gantry cranes have L-shaped and C-shaped door legs. The L-shape is easy to manufacture and install, and the stress conditions are good. The quality of the L-shape is small. However, the space for lifting cargo through the legs is relatively small. The C-shaped legs are made to be inclined or curved so as to have a large lateral space for the cargo to pass through the legs.

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  Truss type, double girder, full gantry crane
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  Truss type, single girder, full gantry crane
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  Truss leg, single box girder, full gantry crane

Box girder gantry crane vs. Truss girder gantry crane

• Box type:The use of steel plates welded into a box structure, with high safety, stiffness and other characteristics. It is generally used for gantry cranes with large tonnage and oversized tonnage. As shown in the right figure, MGhz1200 has a lifting capacity of 1,200 tons and is the largest gantry crane in China. The main beam adopts a box girder structure. The box girder also has the disadvantages of high cost, heavy self, and poor wind resistance.
• Truss type: The structural form welded by angle steel or I-beam has the advantages of low cost, light weight, and good wind resistance. However, because of the large number of welding points and the defects of the trusses themselves, the truss beams also have the drawbacks of large deflection, low rigidity, relatively low reliability, and frequent detection of welding spots. Suitable for sites with low safety requirements and low lifting weight.

Adjustable gantry crane vs. Portable gantry crane v.s. Rail mounted gantry crane

Gantry cranes also can be grouped into different crane types, in terms of gantry designs, including:

• Adjustable gantry cranes is designed for warehousing applications, where the movement of materials is required to go through aisles, doorways, around obstacles, and over or under obstructions. Adjustable gantry crane is often used to lift parts and equipment into position in welding shops, fabrication shops and etc.
• Portable gantry crane is flexible, which can be replaced and relocated, which is featured as fast, easy movement to and from a work site.
• Rail mounted gantry crane is used for transferring heavy loads, manually or motorized, over a fixed route.

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  Adjustable gantry crane
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  Portable gantry crane and movable gantry crane
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  Rail mounted gantry crane

Which type of gantry crane, do you need? Select the right type of gantry crane will largely reduce the gantry crane price.Leave a message below to get free consultation on how to select the right type of gantry crane for your application.

Featured gantry cranes of Dongqi Crane & Hoist

In order to win the international gantry crane market, Dongqi Crane exceeds itself in providing superior quality gantry cranes and gantry cranes services. Dongqi Crane is dedicated itself to win the smiles of you, though the efforts in the following aspects:

1. Customized gantry crane perfectly fits your application environment.Taking your building and working conditions and your lifting requirements into full consideration, the engineering team of DQCRANES will work out a gantry crane which will adapt your facility ideally.

2. Types of quality gantry cranes with various tonnages are available which can meet your lifting requirements.

3. Lifetime care is given to your gantry crane to maximize your gantry crane value.

4. Competitive gantry crane price is the unbeatable advantage of Dongqi Crane.On ensuring gantry crane quality, Dongqi Crane & Hoistis delicate to lowering the gantry crane price to lower your purchasing cost.