Ground Rail Single Girder Gantry Crane

 

A Ground Rail Single Girder Gantry Crane is a type of gantry crane designed to run on rails at ground level. This type of crane typically features a single girder (beam) that supports the hoisting mechanism. It is used in applications where lifting and moving heavy loads need to be done within a limited space and at ground level, making it ideal for outdoor environments or in factories with low clearance.

 

Place of Origin:Henan, China

Warranty:2 years

Weight (KG):60000 kg

Video outgoing-inspection:Provided

Machinery Test Report:Provided

Application:warehouses,factory and other place

Crane type:box type gantry crane

Travelling speed:20m/min

Lifting mechanism:Electric Hoist

Control method:Ground Control+ Remote Control (customized)

Working duty:A5

Working Temperature:-20~+40℃

Industrial voltage:380V50HZ3Phanse or other

Color:Customised

Customization:Accepted

 

 

1.Main beam

Single Girder Configuration: As the name suggests, this crane uses a single girder (beam) that spans the space between the two end carriages. It is the primary horizontal load-bearing element of the crane.

Material: The main beam is typically made of high-strength steel or steel alloy to ensure it can support the weight of the load, as well as the stresses exerted during crane operations. In some cases, reinforced steel may be used to increase load capacity.

Shape: The cross-section of the main beam is often I-beam or box girder style, depending on the crane's design. Box girders provide better torsional stability, while I-beams are more commonly used for lighter-duty cranes.

 

2.Lifting System

1)Hoist Mechanism
The hoist is the primary component of the lifting system, and it consists of a motorized mechanism that raises and lowers the load. The hoist is mounted on the trolley, which moves along the crane's main beam.
2)Lifting Mechanism (Rope or Chain)
Rope: For higher capacities (usually over 5 tons), cranes typically use steel wire ropes. Wire ropes are more durable and capable of handling greater weights.

Chain: For lower to medium-capacity cranes, chains are commonly used in the hoist system. Chains are less expensive and easier to maintain, but they are limited in the weight they can lift.

Lifting Height: The lifting height is defined by the length of the rope or chain, the number of sheaves used, and the maximum travel distance of the hoist along the beam.
3)Trolley
The trolley is the platform that carries the hoist mechanism and moves along the crane's main beam. The trolley moves horizontally to position the load above the desired location. It is an integral part of the lifting system, as it ensures that the load is raised and lowered in a precise manner.
4)Hoisting Motor
The hoisting motor is a critical part of the lifting system. It powers the lifting and lowering of the load. The hoisting motor is typically electric in modern cranes but can also be hydraulic or diesel in some applications.
5)Drum or Sheave System
In the hoist mechanism, a drum or sheave system is used to guide and control the rope or chain as it winds or unwinds during lifting and lowering.

3.End carriage

Frame Construction: The end carriage is usually made of steel or high-strength alloy materials to ensure strength and durability. It is designed to support both the main girder and the weight of the load.

Modular Design: The end carriage is designed to be easily integrated with the crane's main girder. In some cases, end carriages can be modular, allowing for easy replacement or maintenance of components like wheels or motors.

Shape and Size: The size and shape of the end carriage are directly related to the crane's lifting capacity and span. It is usually a rectangular frame that supports the wheels and motor systems. The design may vary depending on whether the crane is meant for heavy-duty or lighter applications.

                                         

4.Crane travelling mechanism

The crane traveling mechanism of a Ground Rail Single Girder Gantry Crane is an essential component that allows the crane to move horizontally along its rails. This mechanism provides mobility, enabling the crane to cover the entire length of the operating area. The crane traveling mechanism typically includes the driving system, wheels, and associated control systems, ensuring smooth and reliable movement.

5.Trolley travelling mechanism

The trolley traveling mechanism of a ground rail single girder gantry crane enables the horizontal movement of the trolley (and hoisting unit) along the length of the main beam. This mechanism allows the load to be positioned precisely over the work area and is crucial for the crane's operational flexibility and precision.

6.Crane wheel

The wheel system of a ground rail single girder gantry crane is a vital component that supports the entire crane structure and enables its movement along ground-level rails. These wheels ensure smooth and stable travel of the gantry along the working area.

7.Crane Hook

The hook of a ground rail single girder gantry crane is one of its most critical components, responsible for directly bearing and lifting the load. It interfaces with the hoisting system and must be strong, reliable, and safe.

8.Motor

The motor of a ground rail single girder gantry crane is the powerhouse behind its critical movements, including lifting, trolley travel, and crane travel. These motors are specially selected and configured to deliver reliable performance, smooth operation, and safety under varying load and environmental conditions.

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9.Sound and light alarm system & limit switch

The Sound and Light Alarm System and Limit Switches of a ground rail single girder gantry crane are essential safety and control components that ensure reliable and secure crane operation, particularly in industrial or outdoor environments where visual and audible alerts are crucial.
1)Sound and Light Alarm System
Purpose
Warns workers of crane movement (traveling, lifting).

Alerts in case of abnormal operation or emergencies.
2)Limit Switches
Purpose
Prevents over-travel or mechanical collision.

Protects crane and load from damage.

10.Safety Devices

The safety devices of a ground rail single girder gantry crane are crucial for protecting operators, equipment, and materials during lifting and traveling operations. These devices are designed to prevent accidents, reduce wear, and ensure compliance with international safety standards such as ISO, FEM, and GB.

11.Control Mode

1)Pendant Control (Wired)
Description: A control pendant is suspended from the crane, connected via a flexible cable.

Features:

Simple and cost-effective.

Operator walks with the crane.

Includes emergency stop and directional push buttons.

Limitations: Limited range; cable can wear over time or get tangled.

2)Remote Control (Wireless)
Description: A handheld transmitter sends signals to a receiver on the crane via radio frequency.

Features:

Operator can stand at a safe distance.

Increases visibility and safety in hazardous areas.

Range typically 50–100 meters.

Multi-speed control (optional).

Safety: Emergency stop button; encrypted signals to avoid interference.

3)Cabin Control (Optional for Large Cranes)
Description: Operator sits in a cabin mounted on the crane girder or trolley.

Features:

Full visibility for heavy-duty and large-span operations.

Joystick control, instrument panel, and monitoring systems.

Use Case: Rare for single girder cranes; more common in double girder or gantry applications.

4)Combined Control (Pendant + Remote)
Description: Switchable between wired pendant and wireless remote control.

Benefit: Backup option in case of signal interference or remote failure.

Sketch

Main technical

 

 

1. Cost-Effective
Lower material and manufacturing costs compared to double girder designs.

Reduced installation and maintenance expenses.

Efficient use of space with simplified structure.

2. Simple and Lightweight Structure
Single girder reduces total weight of the crane.

Easier to install and relocate.

Requires less foundation and structural support.

3. Flexible Configuration
Can be used with various types of hoists (wire rope or chain).

Available with adjustable span, height, and rail length.

Customizable control modes (wired, wireless).

4. High Mobility
Mounted on ground rails, allowing the crane to travel along a fixed path.

Suitable for long, linear outdoor work areas like stockyards and assembly lines.

5. Efficient Material Handling
Ideal for light to medium-duty tasks (commonly 1–20 tons).

Smooth start/stop operation with inverter control (optional).

Good for repetitive handling tasks with consistent movement.

6. Improved Safety
Equipped with modern safety devices: limit switches, alarms, overload protectors, etc.

Remote control operation reduces operator exposure to risks.

7. Low Maintenance
Fewer mechanical components than double girder systems.

Easy access to drive and electrical components for routine servicing.

8. Space-Saving Design
No need for building columns or support beams.

Rail-mounted on the ground, not suspended from overhead structures.

 

1. Outdoor Storage Yards
Handling steel plates, pipes, rebar, and structural components.

Loading/unloading trucks and organizing inventory.

2. Construction Sites
Lifting and positioning construction materials such as beams, formwork, and prefabricated sections.

Ideal for temporary or semi-permanent setups.

3. Logistics & Warehousing
Moving large containers, pallets, or heavy goods along fixed tracks.

Frequently used in railway yards and distribution centers.

4. Steel Fabrication Plants
Transporting semi-finished or finished metal products.

Used in conjunction with welding and assembly lines.

5. Precast Concrete Plants
Lifting and stacking concrete slabs, pipes, and blocks.

Enables safe and efficient movement across production lines.

6. Shipyards & Port Terminals
Moving tools, light equipment, or maintenance parts along dockside rails.

Supplementary crane for localized tasks.

7. Machinery Manufacturing Workshops
Transferring machine components or large tools between processing areas.

Suitable for outdoor zones where space is limited.

 

 

1. Technical Design & Engineering
Analyze customer requirements: load capacity, span, lifting height, working class.

Structural & mechanical design using CAD/CAE software.

Electrical system layout planning.

Compliance check with relevant standards.

2. Material Procurement
Select high-quality materials: Q235B/Q345B steel for structural parts, forged alloy for hooks, etc.

Source motors, gearboxes, electric components (Schneider, Siemens, etc.).

3. Main Beam & Leg Fabrication
Steel plate cutting (via CNC plasma/laser).

Beam welding (box-type girder or I-beam) and shaping.

Legs fabricated and connected to the beam with precise alignment.

Non-destructive testing (NDT) on weld seams (ultrasonic or magnetic particle inspection).

4. Trolley & Lifting System Assembly
Assemble electric hoist or winch trolley (includes drum, hook, wire rope, motor).

Test-fit hoisting mechanism on girder to ensure smooth movement.

Balance testing and gear alignment.

5. End Carriage & Traveling Mechanism Production
Machine wheels, axles, and bearing housings.

Install drive motor, reducer, buffer system.

Weld or bolt end carriages to gantry legs.

6. Wheel Set & Rail Compatibility Check
Assemble and align wheels for rail tracking accuracy.

Tolerance check to ensure smooth travel without derailment.

7. Electrical System Assembly
Install control cabinet, wiring, motors, limit switches, sound/light alarms.

Lay cable trays and connections for pendant or remote control systems.

Install overload limiter and safety interlocks.

8. Painting & Anti-Corrosion Treatment
Surface sandblasting (Sa2.5 standard) for rust removal.

Apply primer, middle coat, and top coat (standard: yellow, orange, or per request).

Outdoor units get enhanced weatherproof coating.

9. Pre-Assembly & Factory Testing
Trial assembly of all components in the factory yard.

Functional test: lifting, trolley travel, crane travel, brake, limit switch.

Electrical test: insulation resistance, circuit reliability.

10. Packing & Delivery
Disassemble into transportable modules.

Anti-corrosion wrapping, wooden cases/crates for small components.

Container or flat-rack loading with part list, manuals, and test certificates.

11. On-Site Installation & Commissioning
Crane erection on site with rail alignment.

System integration, final testing with rated load.

Operator training and handover.

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%.