Single Girder Gantry Crane Cantilever Design | Cantilever Crane

Cantilever crane for sale. Single girder gantry crane with cantilever design extended trolley runway length. Check how cantilever gantry crane benefits you.

What is the cantilever of gantry crane?

The crane span is the center-to-center distance between the gantry crane's traveling tracks. The cantilever of the gantry crane is the portion of the main beam that hangs out of the span. Simply put for better understanding, it is the portion of the gantry crane's main beam that extends beyond the width of the travelling rails and serves as the gantry crane's cantilever.

For the gantry crane with cantilever, its cantilever camber value has a great influence on the operation and stop reliability of the lifting trolley, which is an important performance index of the bearing structure of the equipment. Generally, a cantilever gantry crane has at least one extended cantilever which can be left, right, or both. The majority of cantilever gantry cranes are used outdoors for various industrial application and uses.

MH Series Single Girder Hoist Gantry Crane Cantilever Design

For the gantry crane as shown in Figure 1, there is an arc-shaped arch in the middle of the main beam span, and an arc-shaped warping at the cantilever end.

The arc camber of the main beam AB and the arc camber of the right effective cantilever BC can be simplified as a straight line in the process of determining the camber of the right cantilever BC, as shown in Figure 2.The main beam span is known to be s, and the functional cantilever length on the right side is L. The outrigger and main beam joint heights a, B, and cantilever effective arm length outer end C relative to the earth, as well as the vertical heights ya, Yb, and YC, are measured.

Typically, the heights of A and B at both ends of the main beam are not equal due to manufacturing and assembly mistakes, i.e., Ya and Yb are not equal. At this moment, the cantilever upwarping f is equal to the distance between point C and line AB, i.e. the length of line segment CD, rather than YC Yb.

Functions of Gantry Crane Cantilever

In general, the gantry crane's span is typically used for the production site, and completed products or materials can be lifted, loaded, transferred, or unloaded by the gantry crane's cantilever outside the span without interfering with normal production operations within the span.

As a result, the gantry crane's cantilever is primarily for the ease of loading, unloading, and lifting cargos without wasting use space in the span. It is extremely useful and simple to use.

How Long can A Gantry Crane Cantilever be?

The gantry crane's cantilever is not as long as it could be; it must be determined based on the customer's particular working conditions. Typically, the length of a gantry crane's cantilever is no more than one-third of the span of the gantry, ensuring both safety and efficiency.

Cantilever gantry cranes

Outdoor use cantilever gantry cranes are classified into two types: cantilever gantry cranes and non-cantilever gantry cranes, and those with cantilever are further classified into single cantilever gantry cranes and double cantilever gantry cranes.

Types of rail travelling cantilevered gantry cranes

Cantilever Gantry Crane Single Girder Type

• Capacity up to 20 tons
• Span up to 30 meters
• Cantilever length is less than 10 meters
• Lifting height is according your request
• Power supply: 220-550V 50/60Hz 3Phase
• Working duty: A3, A4
• Ambient Temperature: -25~40℃
• Application: outdoor and indoor

Cantilever Gantry Crane Double Girder Type for Container Handling

• Capacity up to 500 tons
• Span up to 35 meters
• Cantilever length is less than 12 meters
• Lifting height is according your request
• Power supply: 220-550V 50/60Hz 3Phase
• Working duty: A3~A6
• Ambient Temperature: -25~40℃
• Application: outdoor and indoor

If outdoor use, the main beam and legs may be designed as truss type which has better wind resistance, just like follow photos.

Applications of cantilever gantry cranes  

Cantilever gantry cranes are commonly used for material loading and unloading in interior and outdoor warehouses, factories, docks, and open storage yards.

Cantilever gantry cranes are commonly used to transport bulk cargoes like coal and ores, as well as piece commodities like high-grade rolled metal.They're mostly used in open storage places like railroad freight yards, river ports, and seaports. Lifting capabilities range from 5 to 30 tons, with spans of up to 120 meters and cantilever lengths of up to 50 meters. Their bridges travel at 10-30 m per minute, and their trolleys move at up to 360 m per minute. Grab-bucket cranes have capabilities ranging from 500 to 1,000 tons per hour and higher.

Cantilever ganty cranes are widely used

How can you benefit from gantry crane cantilever design?

Many gantry cranes are designed with cantilevers, but some people are unsure of their purpose. The cantilever of a gantry crane is the portion of the primary girder that extends beyond the crane runway on one or both sides. The cantilever design has several benefits, which are listed below.

• When compared to a gantry crane without a cantilever, this lifting system can expand the span, making it easier to load, unload, and move cargo on one or both sides of the cantilevers without interfering with normal production within the span. As a result, this gantry lifting equipment is a very practical design for a wide range of uses.
• The gantry crane we design needs little maintenance and reduces equipment downtime to increase crane efficiency.
• The crane has a low dead weight, and the optimized construction puts less strain on the crane structure.
• A reasonable and compact structure design allows you to maximize available room.
• Gantry cranes are typically outfitted with a variety of safety devices to ensure that they operate safely and efficiently.

How to Get A Cantilever Gantry Crane Price and Solution?

We are excited to work with you to discover the best solution for your material handling problems, no matter how complex or unique it is. Our engineering team will design a custom cantilever gantry crane for your building that includes everything you need for efficient material handling.

• Lifting capacity: ____ ton
• Lifting height: ____ m
• Crane Span: ____ m
• Cantilever length : left: ____ m, right: ____ m
• Power supply (e.g., 380V 50Hz 3Phase):
• Crane travelling length: ____ m
• If the crane rails and power feeding system is required
• Used indoor? Or outdoor?
• Detailed working conditions of the crane:
• Other requirements:

If you have any need of gantry cranes, please feel free to let us know , we will custom the gantry crane with single or double cantilever for your application based on your needs and requirements.