Tire-Mounted Gantry Crane: Detailed Overview of Features
What is a 20t+20t rubber-tired gantry crane?
Detailed explanation of the dual-hoist configuration
The core of the so-called 20t+20t configuration lies in its two independent 20-ton hoisting mechanisms—the dual-hoist design. These hoists do not share a single power system but operate independently. They can function separately or synchronously, offering high flexibility.
During independent operation, each hoist can lift materials weighing up to 20 tons, such as precast panels or small steel components. This allows a single unit to handle two light-load tasks simultaneously, eliminating the need for additional small cranes and reducing equipment investment.
When operating synchronously, both hoists combine their lifting capacity to handle heavy loads up to 40 tons, such as bridge girders over ten meters long or large precast components. This configuration is ideal for lifting long materials, with each hoist applying force at opposite ends to ensure stability and prevent tilting or deformation during transport.
Advantages of the Tire-Mounted (Rubber Wheel) Design
The tire-mounted design is the core distinguishing feature of this crane compared to rail-mounted models, and the primary reason for its popularity in outdoor operations. Equipped with heavy-duty rubber tires at its base, it requires no fixed tracks. As long as the ground is level and capable of bearing the equipment’s weight, it can move freely.
For precast yards and construction sites where work zones frequently shift and materials need transfer between stations, the tire design offers flexible adaptation. Unlike rail-mounted cranes requiring track reinstallation, this saves significant time and costs.
Its operation is highly agile with a small turning radius. Even in confined spaces with obstacles like precast yards, it can easily turn and maneuver without compromising efficiency. This agile maneuverability makes it an ideal choice for open-yard operations.
Core Technical Parameters
Understanding a crane’s core specifications is essential to determine if it meets your operational needs. Henan Mining’s 20t+20t tire-mounted gantry crane features parameters optimized for real-world applications, ensuring high practicality.
Below is a table of core technical parameters for easy reference:
Structural Design and Engineering Features
Main Beam Structure
This Henan Mining model features a box-type main beam design. This structure offers excellent rigidity and deformation resistance, effectively controlling deflection during heavy lifting operations to prevent beam bending.
During the design process, engineers employ finite element analysis to simulate stress conditions under various loads, optimizing the structural design. This ensures the main beam can sustain 20t+20t heavy loads long-term without fatigue failure.
The main beam is constructed from high-strength steel through precision welding. Weld quality undergoes rigorous inspection to eliminate defects like porosity or cracks, fundamentally guaranteeing structural integrity. This is one of the core reasons for the exceptional durability of Henan Mining’s gantry cranes.
Travel Mechanism
The travel mechanism is the heart of a tire-mounted crane, directly impacting the equipment’s mobility and stability. This model employs a multi-wheel drive system with ample power, enabling smooth operation even on uneven outdoor terrain without power shortages or slippage.
The hydraulic steering system offers effortless operation with a compact turning radius, allowing easy maneuvering and reversing in confined precast yards without compromising efficiency. Its stability remains consistent during prolonged use, preventing stuttering or failure.
The tires are heavy-duty rubber tires, offering high wear resistance and pressure tolerance. They adapt well to complex outdoor conditions like gravel or concrete surfaces. With strong load-bearing capacity, they support both the equipment’s weight and lifted materials, reducing the frequency of tire replacements.
Hoisting Mechanism
The hoisting mechanism is the crane’s “core power source,” and Henan Mining has put considerable thought into its design. Both the motor and reducer undergo rigorous selection, choosing models with high durability and ample power. They can withstand heavy-duty operations over extended periods with minimal risk of failure.
The wire rope system utilizes high-strength, wear-resistant steel wire ropes with excellent break resistance, capable of handling a rated load of 20 tons. The ropes feature effective lubrication to reduce wear, extend service life, and lower long-term maintenance costs.
Control options include dual-speed and variable frequency drive (VFD) configurations. Dual-speed operation accommodates diverse work scenarios: low speed ensures stability when handling heavy loads, while high speed boosts efficiency for lighter materials. VFD control delivers smoother operation, minimizes load sway, and enhances lifting precision.
Advantages of the 20t+20t Rubber-Tired Gantry Crane
It serves as the ideal RTG crane for precast yards. Precast yards handle diverse materials—light or heavy, long or short—and the dual-hoist configuration adapts flexibly. Single hoist handles light loads, while dual hoists synchronize for heavy loads, eliminating the need for additional equipment and reducing costs.
For temporary projects, it offers exceptional value. With short project timelines making track installation impractical, this crane can be relocated at any time. After project completion, it can be transferred to other sites for continued use, ensuring high utilization and avoiding wasted equipment investment.
The dual-hoist design is specifically engineered for handling long materials like bridge girders and extended steel components. By applying force at both ends of the material, it ensures stability during lifting, preventing tilting or deformation and minimizing the risk of damage.
Typical Application Scenarios
Precast Concrete Beam Yard
Precast concrete beam yards represent one of the primary application scenarios for this model. These yards require lifting bridge girders, precast panels, and other materials that are either extremely heavy or exceptionally long—challenges conventional cranes struggle to handle.
Steel Structure Manufacturing Plants
Steel fabrication plants also benefit greatly from this model, primarily for moving steel components and performing modular assembly. Steel parts vary widely in weight, from lightweight to heavy. The dual-hoist configuration offers flexible adaptation, eliminating frequent equipment changes.
During modular assembly, multiple steel components must be precisely positioned at designated locations. This model’s high positioning accuracy ensures assembly precision. Its agile mobility allows seamless movement both indoors and outdoors, adapting to various assembly stations.
Infrastructure Project Sites
This model is frequently deployed at infrastructure project sites for bridges, roads, railways, and more. At bridge construction sites, it handles lifting bridge girders and precast pier components. For road and railway projects, it transports large equipment and building materials, flexibly adapting to outdoor work environments.
Most infrastructure sites are open-air areas without fixed rails. This tire-mounted crane’s advantage shines here—it moves freely on-site without rail installation, completing lifting tasks and boosting construction efficiency.
Why choose Henan Mines’ tire-mounted gantry cranes?
In terms of manufacturing capability, Henan Mines operates a 1.62 million square meter production base equipped with advanced machinery, enabling mass production of heavy-duty mobile gantry cranes. The standardized production process ensures strict quality control at every stage—from raw material procurement to manufacturing—guaranteeing consistent product reliability.
Engineering Support: Henan Mining’s professional technical team provides comprehensive support throughout the entire process—from equipment selection and customized design to on-site installation and commissioning—with engineers closely following up to resolve practical issues. The company also collaborates with multiple universities and research institutions to continuously optimize product design and enhance performance.
With extensive export experience, our products are sold nationwide and across Belt and Road countries and regions. Our network of 428 sales and service centers nationwide ensures timely after-sales support, even for exported equipment.
Safety and Control Features
Overload protection is standard. When lifted loads exceed rated capacity, the equipment automatically shuts down, preventing structural damage, material drops, and safeguarding personnel and equipment.
Limit switches are critical, restricting lifting height and travel distance to prevent operation beyond safe parameters.
Emergency braking systems enable rapid shutdown during unexpected situations.
Anti-sway technology minimizes material oscillation during lifting, particularly when handling long loads. It effectively controls sway amplitude to prevent collisions and material drops while enhancing positioning accuracy, ensuring precise delivery to designated locations.
Two control methods are available: cab control and remote operation. The cab offers unobstructed visibility, enabling operators to clearly observe the work area and precisely control equipment movements.
Customization Options
Different clients have unique operational scenarios and requirements. Standardized equipment often fails to fully meet these needs. Henan Mining provides comprehensive customization services, adjusting equipment parameters and configurations based on your actual demands.
Power options include electric and diesel. Customers without stable outdoor power sources can choose the diesel model, which features self-contained power. For those with stable power access, the electric model offers greater energy efficiency, environmental friendliness, and lower long-term operating costs.
Control methods are also selectable. Cab control suits long-term fixed-position operations, while remote control is ideal for flexible outdoor tasks. Choose the control method best suited to your specific work environment.
Additionally, weather protection features—such as rain and wind shields—can be added based on outdoor environmental conditions. These prevent adverse weather from affecting equipment operation and extend its service life.
Installation and Maintenance Considerations
Foundation requirements are minimal; no complex base is needed. A level, solid ground capable of supporting the equipment’s weight and lifted materials is sufficient. Before installation, verify ground flatness to prevent equipment swaying or tilting during operation.
For spare parts supply, Henan Mining maintains a comprehensive spare parts system with common components in stock for prompt delivery, preventing prolonged downtime due to shortages. Contact your local sales service center for rapid spare part procurement.
20t+20t vs Single 40t Gantry Crane: Which to Choose?
Many customers struggle with this decision: for lifting 40-ton loads, should they opt for a 20t+20t dual-hoist model or a single 40t unit? The key lies in your operational requirements—there’s no absolute superior choice, only the better fit.
In terms of flexibility, the 20t+20t model clearly wins. Its dual hoists operate independently, enabling both light and heavy-load handling to suit diverse scenarios. The single 40t model, however, is limited to lifting around 40 tons. When handling lighter loads, it becomes inefficient and lacks flexibility.
Regarding structural load distribution, the 20t+20t model is more rational. When both hoists operate simultaneously, the load is evenly distributed across both ends of the main beam, reducing stress concentration and extending equipment lifespan. In contrast, the single 40t model concentrates the load on a single hoist position, causing localized stress on the main beam that can lead to fatigue damage over time.
Cost-wise, both configurations offer distinct advantages. For operations primarily handling heavy loads with occasional light loads, the single 40-ton model presents lower upfront costs. However, for complex work environments involving both light and heavy loads, the 20-ton + 20-ton model eliminates the need for additional equipment, proving more economical over the long term.
Application differences: The 20t+20t model is better suited for precast plants, infrastructure sites, and other scenarios requiring handling of long materials or diverse loads. The single 40t model is more appropriate for dedicated heavy-load lifting tasks, such as large equipment relocation, where the operational environment is relatively fixed.
Frequently Asked Questions (FAQ)
Customers frequently ask specific questions about this model. I’ve compiled the most common ones for unified answers to help you quickly understand.
Q: Can both hoists operate simultaneously?
A: Yes, both hoists support synchronized operation, enabling the lifting of up to 40 tons when working together. They can also operate independently, each handling loads under 20 tons, offering high flexibility.
Q: What is the maximum span?
A: Standard spans range from 10.5m to 31.5m. Custom spans exceeding 31.5m are available. The achievable span depends on your site dimensions and operational requirements. Our engineers will design the optimal span based on your needs.
Q: Is track installation required?
A: No. This model features a tire-mounted design with rubber tires. It can move freely on level, solid ground without fixed tracks, saving time and costs.
Q: What export certifications are available?
A: Henan KESHA’s products hold EU CE certification, ISO9001 quality system certification, and more, meeting import requirements for various countries and regions. If you have export needs, please inform us in advance so we can prepare the corresponding certification documents.
Q: What is the delivery lead time?
A: Standard models have a lead time of 30-50 days. Customized models require 45-60 days, depending on complexity. Please consult our staff for precise delivery scheduling.
Summary and Call to Action
In summary, the Henan Mining 20t+20t tire-mounted gantry crane is a highly adaptable, durable, and flexible heavy-duty mobile gantry crane. It serves as an ideal solution for double hoist rubber-tyred gantry cranes and RTG cranes for precast yards.
For detailed information—including customized solutions, technical specifications, and pricing—contact us today. Submit your site layout, and our engineers will provide a comprehensive technical proposal. We’ll also deliver precise quotations tailored to your requirements, helping your project advance efficiently.
