How to choose gantry crane?

Gantry cranes are a variation of overhead traveling cranes.Gantry crane metal frame is similar to the leg, the load-bearing girder to install two legs,can run directly on the ground track,both ends of the main beam has cantilever, also known as cantilever gantry crane. Gantry cranes have the advantages of high site utilization, wide range of operation, wide adaptability and versatility.It has been widely used in the indoor and outdoor industrial and mining enterprises, iron and steel industry, railway transportation, port and terminal, logistics, and other departments and places.

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There are many different types of gantry crane, only choosing the right gantry crane, the work efficiency is higher, the cost is lower. So what kind of gantry crane can we choose? I will give you some suggestions to choose your own gantry crane.

Single girder gantry crane or double girder gantry crane?

Firstly, all the gantry crane must meet the relative requirements, in China, these standards include GB/T— and GB-86.

Generally speaking, if the lifting weight is less than 50t, span is less than 35m, and there is no special requirements, you should to use single girder gantry crane. On the contrary, if the width of gantry leg is required large, working speed is high, or it need to lift heavy load and large-sized object, then the double girder gantry crane is an ideal choice.

Requirements of  wheel distance

• Meet the requirement of the stability of the gantry crane along the direction of the track.
• Pay attention to the proportional relationship between track B and S span, general track B= (1/4 - 1/6) S.
• Dimension of cargos can be smoothly through the legs of flat steel.

Distance

During the operation of gantry crane, a certain space dimension should be left between the external size of the gantry crane and the cargo and the transport vehicles, in order to facilitate loading and unloading operations. In general, during the loading and unloading of the transport truck, it should keep a distance more than 0.7m between the truck and the gantry leg. hen not working, the slings should keep a distance more than 0.5m with the transport truck. When the cargo pass the gantry leg, it should keep a distance more than 0.5m.

Span and cantilever length

The span of the gantry crane is an important factor affecting the quality of the gantry crane. When the span is selected, the span should be shortened as long as the equipment is used and the span series standards are met.

The span of double beam gantry crane is an important factor affecting the quality of the crane. In loading and unloading, the transport vehicle should maintain a certain distance at least 0.7m with the gantry crane leg. When not working, the slings should keep a distance more than 0.5m with the transport truck.

Electric equipment for gantry crane

Choosing the Right Gantry Crane for Container Yards: Rail-Mounted vs. Rubber-Tired

In the fast-paced world of shipping and logistics, container yards play a crucial role in efficiently managing and transporting cargo. Among the essential equipment used in these facilities are gantry cranes, which are responsible for lifting and relocating shipping containers with precision and efficiency. Two primary types of gantry cranes dominate container yard operations: rail-mounted gantry (RMG) cranes and rubber-tired gantry (RTG) cranes. Each type offers unique advantages and is suited to specific operational needs. Understanding the differences between RMG and RTG cranes can help you determine the best fit for your container yard.

Understanding the Basics: RMG vs. RTG Cranes

Rubber-Tired Gantry (RTG) Cranes

As the name suggests, RTG cranes are equipped with rubber tires, allowing them to move freely throughout the container yard. This mobility provides greater flexibility in operations, making RTGs an excellent choice for yards with dynamic layouts and varied container placement needs. RTG cranes can be driven to different locations within the yard, optimizing container handling efficiency.

However, the rubber tires present some limitations. RTG cranes have a restricted lifting capacity compared to their rail-mounted counterparts. The weight they can carry is limited by the strength of their tires and the need to maintain balance while moving. Additionally, because RTGs rely on diesel or hybrid power sources, they can have higher operational costs and environmental impacts compared to fully electric cranes.

Rail-Mounted Gantry (RMG) Cranes

RMG cranes, on the other hand, operate on fixed rail tracks. This design provides a more stable lifting platform, allowing RMG cranes to handle heavier loads than RTG cranes. Their steel wheels reduce friction and allow for a higher load-bearing capability, making them ideal for large-scale container yards with high-volume container handling requirements.

The main limitation of RMG cranes is their lack of mobility. Unlike RTG cranes, they cannot move freely around the yard and are confined to the track system. This means that the yard layout must be planned carefully to

accommodate the fixed movement paths of the RMG cranes. However, their higher efficiency, lower maintenance costs , and electric-powered operation make them a sustainable and cost-effective choice for long-term container handling needs.

Key Factors to Consider When Choosing a Gantry Crane

When deciding between RMG and RTG cranes for your container yard, several factors must be taken into account, including yard layout, operational needs, and long-term cost considerations.

1. Yard Layout and Size

The physical layout of your container yard is a significant factor in determining the right crane type.

• RTG Cranes: Ideal for container yards with irregular layouts or areas requiring frequent repositioning of equipment. The ability to move freely allows RTGs to adapt to different stacking configurations and optimize space utilization.

• RMG Cranes: Best suited for container yards with fixed stacking areas and well-defined rail tracks. If your yard operates with a high level of organization and efficiency, RMG cranes can streamline container handling and reduce delays.

2. Lifting Capacity and Efficiency

• RTG Cranes: Limited in their lifting ability due to their reliance on rubber tires. They are best suited for medium-capacity lifting needs.

• RMG Cranes: Capable of lifting significantly heavier loads due to their stable steel wheel design. If your container yard handles large volumes of cargo regularly, RMG cranes may be the better choice.

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3. Energy Consumption and Environmental Impact

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• RTG Cranes: Typically powered by diesel or hybrid engines, RTG cranes consume more fuel and contribute to higher carbon emissions. Some modern RTGs are transitioning to electric or hybrid-electric models to reduce their environmental footprint.

• RMG Cranes: Fully electric-powered, making them a more sustainable and cost-efficient option in the long run. Reduced reliance on fossil fuels also translates to lower operating costs over time.

4. Maintenance and Downtime

• RTG Cranes: Require frequent maintenance due to their moving parts and reliance on rubber tires, which can wear out over time.

• RMG Cranes: Have fewer moving parts and lower maintenance requirements. However, if an RMG crane experiences a breakdown, repairs may take longer due to the complexity of the rail system.

Advantages of RMG Cranes in Large-Scale Operations

For intermodal container yards handling high container volumes, RMG cranes offer a range of advantages:

• Higher Load Capacity: RMG cranes can handle heavier loads, making them ideal for large-scale shipping operations.

• Versatility in Rail Configurations: They can be customized with different rail layouts to enhance efficiency.

• Extended Reach: RMG cranes can cover over 300 feet using cantilever extensions, allowing them to access multiple rail trac ks and stacking sections.

• Greater Efficiency: They operate faster and with greater precision than RTG cranes, reducing the time required to move containers.

Challenges of RMG Crane Implementation

Despite their benefits, RMG cranes come with certain challenges:

• Higher Initial Investment: The cost of installation and infrastructure development for rail-mounted systems is higher than RTG cranes.

• Limited Mobility: Once installed, RMG cranes are confined to their designated tracks, limiting their flexibility.

• Potential Downtime: In the event of a breakdown, operations may be delayed as repairs and maintenance take place.

When to Choose RTG Cranes

While RMG cranes offer numerous advantages, RTG cranes are the preferred option for many container yards due to their:

• Flexibility: Ability to move around the yard without being confined to a track.

• Lower Upfront Costs: No need for rail installation, making them a more affordable option for smaller yards.

• Adaptability: Suitable for yards with changing layouts or expansion plans.

Conclusion: Making the Right Choice

Selecting the right gantry crane depends on your container yard's specific needs. If your operations require high-capacity lifting, efficiency, and long-term cost savings, RMG cranes are the superior choice. However, if flexibility and mobility are critical, RTG cranes provide the adaptability needed to optimize yard space and streamline operations.

At Hercules Crane and Lifting Supplies , we provide top-tier lifting solutions tailored to meet the demands of modern industries. Whether you're looking for gantry cranes, jib cranes, bridge cranes, or monorails, our expert team is here to guide you in selecting the best equipment for your needs. Contact us today to learn more about our lifting solutions and how we can help improve your efficiency.