Rail Container Gantry Crane

 

Key Features of Rail-Mounted Gantry Cranes

1. Rail-Based Movement System

Runs on parallel steel rails embedded in the yard, allowing precise movement along container stacks.

Can span 6–12 container rows and stack 4–6 tiers high.

2. High Load Capacity & Efficiency

Lifts 30–50 tons (single-container handling) or up to 100+ tons (twin-lift models).

Faster cycle times compared to RTGs due to smoother rail movement.

3. Automation & Smart Technology

Automated stacking cranes (ASCs) use AI, GPS, and RFID for unmanned operations.

Remote-controlled via operator cabins or ground control stations.

4. Energy Efficiency

Regenerative braking recaptures energy during lowering.

Electric-powered (no diesel emissions), reducing operational costs.

5. Safety & Reliability

Anti-collision sensors prevent accidents with other cranes.

Wind-resistant design (anemometer-controlled braking).

 

Comparison: RMG vs. RTG Cranes

Feature	Rail-Mounted Gantry (RMG)	Rubber-Tired Gantry (RTG)
Mobility	Fixed rails (high precision)	Moves on rubber tires (flexible)
Automation	Highly automated	Mostly manual/semi-auto
Energy Use	Electric (energy-efficient)	Diesel or hybrid
Load Capacity	30–100+ tons	30–50 tons
Maintenance	Lower (fewer moving parts)	Higher (tire wear)

 

Core Components：Bearing, Gear, Gearbox, Motor

Place of Origin：Henan, China

Warranty：1 Year

Weight (KG)：2000 kg

Video outgoing-inspection：Provided

Machinery Test Report：Provided

Keywords：gantry crane

Color: Customized

Size: Customized

Design: computer optimization design

Safety: High flexible flat cable power

Application: construction industrial,workshop,warehouse

Working class: A3-A8

Certification: ISO,CE,BV,S GS,TUV

Power Source: 380~480V,customized

 

 

1. Structural Framework
Main Girder (Bridge)

Single or double box girder construction (typically 40-100m span)

Fabricated from high-grade steel (S355/S460) with corrosion-resistant coatings

Designed for ISO container profiles (20'/40'/45'/53' lengths)

 

Support Legs

Two or four vertical columns with reinforced knee braces

Height clearance: 15-25m (for stacking 4-6 high containers)

Equipped with ladder access and maintenance platforms

End Carriages

Heavy-duty steel frames housing drive mechanisms

8-16 wheels per crane (dual-flanged steel wheels)

Wheel load capacity: 25-50 tons per wheel

 

2. Motion Systems
Travel Drive System

4-8 AC frequency-controlled motors (15-45 kW each)

Planetary gear reducers (ratio ~1:100)

Rail clamps for parking (hydraulic or mechanical)

Trolley System

Low-profile design with 4-8 running wheels

Servo-controlled transverse movement (speed: 30-60 m/min)

Festoon cable management system

 

 

Lifting Mechanism

Wire rope hoist (4/6/8 falls) or hydraulic lift

20-60 ton capacity spreader (twistlock or vacuum type)

Anti-sway control system (Laser/IMU-based)

3. Electrical & Control Systems
Power Supply

480V-690V 3-phase AC via conductor bars or cable reels

Backup diesel generator (for critical operations)

Control Components

Siemens/ABB PLC with PROFIBUS communication

HMI touchscreen in operator cabin

Remote radio control (2.4GHz frequency hopping)

Automation Features

OCR (Optical Character Recognition) for container ID

Laser scanning for position detection

Automated path planning software

4. Rail Infrastructure
Running Rails

QU100/QU120 crane rails (UIC 60/ASCE 136)

Welded joints with expansion allowances

Rail inclination: 1:20 to 1:40 gradient

Foundation System

Reinforced concrete beams (1.5-3m depth)

Rail fastening: elastic clip systems (Pandrol type)

Conductivity bonding for earthing

 

5. Safety Systems
Load Monitoring

Strain gauge load cells (±0.5% accuracy)

Overload cut-off at 110% SWL

Collision Prevention

Laser scanners (10-30m range)

Radar-based anti-collision (for multiple RMGs)

Environmental Protection

Wind speed anemometer (cut-off at 20m/s)

Lightning protection system (IEC 62305)

.

6. Specialized Container Handling Attachments
Spreader Types

Fixed frame (20'/40')

Telescopic (20'-53')

Twin-lift (2x20')

Rotating (for sideways container placement)

Ancillary Tools

Container top handlers

Bulk material grabs

Coil lifting beams

Technical Specifications Comparison

Parameter	Small RMG	Medium RMG	Large RMG
Span	30m	50m	80m+
Lifting Capacity	30t	50t	100t (twin-lift)
Stack Height	3-over-1	5-over-2	6-over-3
Power Consumption	80kW	150kW	300kW

 

 

SKETCH

 

Main technical

 

 

Key Advantages of RMG Cranes

Superior Operational Efficiency

Achieve 25-35 moves/hour (vs. 15-20 for RTGs)

Precision rail guidance enables ±5mm positioning accuracy

Dual-cycle operations (simultaneous pickup/placement)

Enhanced Automation Capabilities

Fully automated models reduce labor costs by 60%

Integrated OCR (Optical Character Recognition) systems

Auto-stacking algorithms optimize yard space utilization

Energy & Cost Savings

Regenerative power systems recover 15-20% of energy

Electric operation cuts fuel costs by $150,000+/year vs. diesel RTGs

Longer lifespan (25+ years vs. 15 for RTGs)

High-Density Storage

Stack heights up to 6 containers (18m)

Narrow rail gauge allows tighter spacing (5.5m between rows)

Overhead clearance eliminates ground obstacles

Improved Safety

Autonomous collision avoidance (LiDAR+radar)

Container sway control (<0.5° deviation)

Storm-proof designs withstand 200km/h winds

Primary Applications

Container Terminals

High-volume ports (5,000+ TEUs/day)

Intermodal transfer hubs (ship-to-rail operations)

Example: Shanghai Yangshan Port's automated RMG system handles 16 million TEUs/year

Inland Ports & Dry Ports

Rail-to-truck transloading facilities

Cross-docking operations

Specialized for 53' domestic containers

Automated Storage Yards

Lights-out operations with remote monitoring

Block stacking configurations

Integrated with AGV systems

Specialized Cargo Handling

Heavy-lift projects (up to 100t)

Refrigerated container management

Dangerous goods storage zones

 

 

1. Design and Engineering

Requirement Analysis

Understand the client's specifications (load capacity, span, height, working environment, etc.).

Determine operational parameters: lifting height, travel speed, working frequency, etc.

Preliminary Design

Create conceptual designs and 3D models.

Choose materials based on strength and environmental conditions.

Detailed Engineering

Develop detailed engineering drawings (structural components, mechanisms, electrical systems).

Perform stress and fatigue analysis to ensure safety.

2. Material Procurement

Source high-quality materials, including:

Steel plates and profiles for structural components.

Motors, gearboxes, and other mechanical parts.

Electrical systems and control components.

Inspect materials to ensure compliance with quality standards.

3. Fabrication

Structural Component Fabrication

Cut, weld, and assemble the steel structures (main girder, cantilever arms, legs, etc.).

Ensure precise alignment and dimensions.

Perform surface treatment (e.g., shot blasting, painting) for corrosion protection.

Mechanical Assembly

Assemble mechanical parts (trolley, hoist, wheels, etc.).

Install motors, gearboxes, and drive systems.

Electrical Assembly

Install electrical components (control panels, cables, sensors).

Wire and connect the system to ensure functionality.

4. Quality Inspection

Material Inspection

Verify material certification and conduct tests (e.g., tensile tests).

Structural Inspection

Inspect weld quality (e.g., ultrasonic testing).

Ensure dimensional accuracy and surface finishing.

Assembly Inspection

Check alignment and functionality of all parts (mechanical and electrical).

Load Testing

Conduct static and dynamic load tests to ensure safe operation.

5. Factory Acceptance Testing (FAT)

Conduct a comprehensive trial run, including:

Full load and overload tests.

Functionality of all safety devices (e.g., limit switches, emergency brakes).

Smooth operation of trolley, hoist, and crane travel.

Document results and obtain client approval.

6. Disassembly and Packing

Disassemble the crane into transportable sections.

Pack components securely to prevent damage during transportation.

Label and prepare a packing list for efficient reassembly.

7. Transportation

Deliver the crane components to the installation site using appropriate transportation methods.

8. Installation and Commissioning

On-Site Assembly

Assemble structural components and mechanical systems.

Install electrical systems and control panels.

Calibration and Testing

Recalibrate the crane system for site-specific conditions.

Perform on-site load testing to verify performance.

9. Handover

Provide training to the client's personnel on safe operation and maintenance.

Deliver technical documentation (user manual, maintenance guide, certificates).

Obtain final approval and acceptance from the client.

10. After-Sales Support

Offer warranty services and maintenance support.

Provide spare parts and technical assistance as needed.

Workshop view:

The company has installed an intelligent equipment management platform, and has installed 310 sets (sets) of handling and welding robots. After the completion of the plan, there will be more than 500 sets (sets), and the equipment networking rate will reach 95%. 32 welding lines have been put into use, 50 are planned to be installed, and the automation rate of the entire product line has reached 85%.