Rubber Tyre Tire Mobile Container Gantry Crane

 

Why Choose RTG Cranes?

Best for flexible, mobile container handling in medium-to-large terminals.

Ideal for ports expanding operations (no need for rail infrastructure).

Future-proof with hybrid/electric and automation upgrades.

 

Advantages of RTG Cranes:

✔ Flexibility – Can be relocated as needed.
✔ High Stacking – Optimizes yard space.
✔ Better Ground Pressure Distribution (compared to rail-mounted cranes).

 

Disadvantages:

❌ Higher Maintenance (tires, steering systems).
❌ Less Stable in High Winds (may require locking mechanisms).
❌ Diesel RTGs produce emissions (electric/hybrid models are preferred for sustainability).

 

Comparison with Other Gantry Cranes:

Feature	RTG (Rubber Tyre)	RMG (Rail-Mounted)	STS (Ship-to-Shore)
Mobility	High (rubber tires)	Fixed (rails)	Fixed (rails)
Use Case	Yard operations	Yard/rail ops	Ship loading/unloading
Power	Diesel/Electric/Hybrid	Electric	Electric
Stacking	4–6 high	5–7 high	N/A

 

Lifting Capacity: 30 metric tons (30,000 kg)
Span: 10m–35m (customizable)
Lifting Height: 6m–20m (adjustable)
Hoist Type: Double-girder with electric wire rope hoist (QD-type)
Travel System: Motorized (rail-guided or rubber-tired)
Wheel Type: Steel wheels (for rails) / Pneumatic tires (floor use)
Control System: Cabin-operated or remote control
Power Supply: 380V/50Hz (3-phase)
Structural Steel: Q345B (high-strength) with corrosion-resistant coating

1. Main Gantry Frame

The core steel structure consisting of two vertical legs, two horizontal beams, and a cross girder. Designed for high rigidity and container clearance.

2. Trolley (Hoisting Mechanism)

Travels along the horizontal beam; carries the spreader and hoisting system. Handles container lifting, lowering, and fine positioning.

3. Spreader (Telescopic Container Lifter)

Specialized attachment that grips containers. Typically adjustable to handle 20ft, 40ft, or 45ft ISO containers.

4. Hoisting Mechanism

Winch and wire rope system used for lifting containers via the spreader. Equipped with motors, gearbox, brakes, and limiters.

 

5. Trolley Travel Mechanism

Drives the trolley along the crane's horizontal girder; includes electric motors, wheels, and drive shafts.

6. Crane Traveling System (Wheel Bogies)

Multi-axle wheel assemblies (typically 8 or 16 rubber tires) that move the entire gantry crane horizontally across the yard.

 

7. Steering System

Controls wheel rotation and direction. May include 360° pivoting capability for high maneuverability.

8. Power Supply System

Powered by diesel generator, hybrid, or full electric motor. Includes fuel tanks, batteries, or cable reel system.

 

9. Electrical System & Control Panel

Centralized panel that manages crane operations, VFD drives, safety interlocks, and overload protection.

10. Operator Cabin / Remote Console

Cabin typically mounted on the crane or use of a wireless remote control for safe, flexible operation.

11. Safety Systems

Includes overload limiters, anti-collision systems, emergency stops, limit switches, wind speed alarms, fire extinguishing systems, and CCTV.

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12. Lighting & Alarm Systems

LED work lights, rotating beacons, horns, and fault alarms ensure visibility and safety in 24/7 operations.

Optional Advanced Features

Automated Guided Vehicle (AGV) Compatibility – For fully automated ports.

Hybrid/Electric Conversion Kits – To reduce emissions.

Remote Monitoring (IoT Sensors) – For predictive maintenance.

SKETCH

Main technical

 

RTG cranes are widely used in ports, terminals, and logistics hubs due to their flexibility, efficiency, and cost-effectiveness. Here are their key advantages:

1. High Mobility & Flexibility

Rubber tires allow free movement (unlike rail-mounted gantry cranes).

Can be relocated easily within the yard or to different terminals.

No fixed tracks required, reducing infrastructure costs.

2. Optimal Space Utilization

Can stack containers 4–6 high, maximizing storage density.

Wide span configurations (e.g., 6+1, 7+1) allow efficient yard organization.

3. Versatile Power Options

Diesel RTGs – Suitable for remote or non-electrified yards.

Electric (eRTG) & Hybrid RTGs – Lower emissions, energy-efficient.

Battery-powered RTGs – Emerging as a green alternative.

4. High Productivity & Speed

Fast container handling (30–50 tons capacity).

Automated RTGs (AS-RTGs) improve efficiency with AI-guided stacking.

5. Lower Initial Cost vs. RMGs

No rail infrastructure needed, reducing setup costs.

Easier to deploy in temporary or expanding terminals.

6. Adaptability to Automation

Can integrate with AGVs (Automated Guided Vehicles).

Remote-controlled & autonomous operation reduces labor costs.

7. Better Ground Pressure Distribution

Rubber tires spread load evenly, reducing ground damage vs. rail systems.

 

1. Port Container Terminals

Stacking containers in yard blocks.

Transferring boxes between trucks, trains, and STS cranes.

2. Intermodal Rail Yards

Loading/unloading containers from trains to trucks.

Temporary storage before onward transport.

3. Logistics Hubs & Depots

Repositioning empty containers for reuse.

Cross-docking operations in distribution centers.

4. Private Terminals & Industrial Sites

Heavy industries (steel, mining) handling bulk containers.

Military & disaster relief (mobile container management).

5. Automated & Smart Ports

Automated RTGs (AS-RTGs) with AI-guided navigation.

Integration with terminal operating systems (TOS) for real-time tracking.

 

 

1. Design and Planning

Demand Analysis: According to customer needs and usage scenarios, a detailed demand analysis is carried out to determine the specifications, load, span, lifting height, etc. of the crane.

Engineering Design: Engineers use CAD and other design software to carry out detailed design, including structural, mechanical, electrical and other aspects to ensure that the design meets relevant standards and specifications.

2. Material Procurement

Material Selection: Select appropriate steel, motors, control systems and other components according to design requirements.

Supplier Screening: Screen suppliers of materials and components to ensure the quality and reliability of materials.

3. Processing and Manufacturing

Cutting and Forming: Cut, weld, bend and other processes on steel to form main beams, end beams and other structural components.

Machining: Precision machining of key components, such as turning, milling, drilling, etc., to ensure that the size and accuracy meet the design requirements.

Surface Treatment: Spray, galvanize or rust-proof metal parts to enhance corrosion resistance and aesthetics.

4. Assembly

Component Assembly: Assemble the main beam, end beam, trolley, lifting mechanism and other components to form a complete crane structure.

Installation of electrical system: Install electrical equipment such as motors, control cabinets, sensors, limit switches, etc. to ensure the normal operation of the electrical system.

5. Debugging and testing

Preliminary debugging: Carry out preliminary debugging of the crane to check the coordination and operation of each component.

Load test: Carry out load test to ensure the safety and stability of the crane under rated load, and test the functions of safety devices such as overload protection and limit switches.

Performance test: Test the performance indicators of the crane such as lifting speed, running speed, braking effect, etc. to ensure that they meet the design requirements.

6. Quality inspection

Quality inspection: Carry out a comprehensive quality inspection of the crane, including appearance, size, performance, etc., to ensure compliance with relevant standards.

Safety assessment: Carry out safety assessment to ensure the normal operation of all safety devices and systems.

7. Delivery and installation

Packaging and transportation: Pack qualified cranes and prepare them for transportation to the customer site.

On-site installation: Carry out on-site installation according to customer requirements, including basic production and equipment debugging.

Training and handover: Train operators to ensure that they master the operation methods and safety precautions of the equipment and complete the handover work.

 

 

 

 

 

 

 

Material Inspection

Quality Inspection: Strict quality inspection is carried out on the purchased raw materials to ensure that they meet the design requirements and national standards.

Material Storage: Qualified materials are stored according to classification to prevent corrosion or damage.

Cutting and Forming

Steel Cutting: Use plasma cutting, laser cutting or flame cutting and other technologies to cut the steel according to the size of the design drawing.

Forming Processing: Form the steel plate through bending, rolling, welding and other processes to manufacture the main beam, end beam and other structural parts.

Welding

Component Welding: The cut and formed steel parts are welded into the main structures such as the main beam, end beam and trolley. The welding process needs to be strictly controlled to ensure the structural strength and welding quality.

Weld Inspection: Use non-destructive testing technology (such as ultrasonic testing, radiographic testing) to inspect the welds to ensure that there are no cracks or other defects.

Machining

Precision Machining: Precision machining is performed on the key components of the crane, such as wheel sets, bearing seats, pulleys, etc., to ensure their dimensional accuracy and surface quality.

Assembly of the whole machine

General assembly: On the basis of pre-assembly, the overall assembly of the crane is carried out, including the final installation of the main beam, end beam, lifting mechanism, walking mechanism, etc.

Commissioning and testing

Under dynamic conditions, the operating performance of the crane is tested, including the testing of lifting, walking, steering and other functions. The overall size of the assembled bridge crane is checked to ensure that all dimensions meet the design requirements.

Spraying and anti-corrosion treatment

Surface treatment Rust removal: Rust removal on the surface of the crane, common methods include sandblasting, pickling, etc. Primer spraying: Spray anti-corrosion primer on the treated surface to prevent metal oxidation and corrosion. Topcoat spraying Color spraying: Spray topcoat according to customer requirements or industry standards to give the crane a protective and decorative effect. Marking: After spraying, mark the crane's identification information in accordance with the specifications, such as model, rated load, etc.

Factory and installation

Packaging and transportation

Packaging protection: Protectively package the key components of the crane to prevent damage during transportation. Transportation arrangement: According to the equipment size and transportation conditions, select a suitable transportation method to transport the crane to the customer's site.

Acceptance and delivery

Customer acceptance

On-site acceptance: The customer conducts on-site acceptance of the crane according to the contract requirements and technical specifications to check the performance and quality of the equipment.

Problem rectification: If any problems are found, the manufacturer needs to rectify them in time to ensure that the equipment fully meets the customer's requirements. Delivery and use Operation training: The manufacturer usually trains the customer's operators to ensure that they can operate the crane correctly and safely.

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