A Frame 15 Ton Single Girder Gantry Crane

 

An A-frame single girder gantry crane is a cost-effective, versatile, and mobile crane system used for lifting and transporting heavy loads in industrial, construction, and outdoor settings. The 15-ton capacity is suitable for medium to heavy-duty operations.

 

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

1)Structure & Design
Type: Single girder, either a box-type beam or a welded I-beam

Shape: Horizontal beam mounted between the two A-frame legs

Design Method: Optimized using finite element analysis (FEA) for structural integrity and deflection control

2)Material
Steel Grade: High-strength structural steel such as Q235B or Q345B (ASTM A36 or equivalent)

Plate Thickness: Typically 6–20 mm, depending on span and load

 

2.Lifting System

Overload Protection: Load limiter integrated into control system

Thermal Protection: Motor has built-in overheating protection

Two-Speed or VFD Drive: For precise control of lifting and soft start/stop

Emergency Stop: Included in control circuit and pendant/remote controller

High Durability: Designed for continuous operation in industrial environments

3.End carriage

The end carriage of an A-frame 15-ton single girder gantry crane is a critical structural and mechanical component that supports the main beam and enables the crane to travel along its track or ground. It also integrates the wheel assemblies and driving mechanism.
Function
Connects the A-frame legs and supports the main girder

Houses the wheels and crane drive motor for longitudinal movement

Bears part of the crane's total load (split with opposite end)

                                         

4.Crane travelling mechanism

The crane traveling system of an A-frame 15-ton single girder gantry crane enables the entire crane structure to move longitudinally along rails (or tires, if mobile). This motion allows the crane to position its lifting mechanism over the load and transport it along the full span of the work area.
Purpose
Enables longitudinal travel of the whole crane on rails or wheels

Provides precise load positioning along the length of the working area

Drives are mounted on the end carriages of the crane

5.Trolley travelling mechanism

The trolley traveling system of an A-frame 15-ton single girder gantry crane is the mechanism that moves the hoisting unit (trolley and hoist) horizontally along the main girder. This system allows precise left-right (cross-travel) positioning of the load.
Purpose
Moves the hoist and hook laterally along the main girder

Enables accurate placement of heavy loads across the crane's span

6.Crane wheel

The wheel of an A-frame 15-ton single girder gantry crane is a critical component of the crane's traveling mechanism. It bears the crane's weight and enables longitudinal movement along rails.
Type
Rail-Mounted Steel Wheels

Typically double-flanged for better rail alignment and anti-derailment

7.Crane Hook

The hook of an A-frame 15-ton single girder gantry crane is a vital load-handling component in the hoisting system. It's responsible for directly engaging with the lifted load, ensuring safe, secure, and efficient lifting operations.
Type of Hook
Forged Steel Hook

Single Hook (standard for 15T)

Optional: Double Hook (for stability or special lifting needs)

8.Motor

VFD (Inverter Drive):Smooth speed control, soft start/stop, energy efficiency
Two-speed Motor :High/low-speed settings for precision and bulk handling
Integrated Brake:Electromagnetic brake mounted on motor shaft for instant stop
Encoder Support:For motion feedback and automation-ready systems

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9.Sound and light alarm system & limit switch

1)Sound and Light Alarm System
Purpose:
Warns workers nearby when the crane is about to start moving or lifting, improving site safety.

Provides visual and audible alerts during crane operation, reducing accident risks.
2)Limit Switches
Purpose:
Prevent the crane or trolley from traveling beyond safe limits, avoiding collisions or derailment.

Protect the hoist from overlifting or over-lowering to prevent damage or accidents.

10.Safety Devices

1. Overload Protection Device
Prevents lifting loads exceeding the crane's rated capacity (15 tons).

Automatically cuts off power or sounds an alarm when overload is detected.

Typically uses load cells or strain gauges to measure the actual load.

2. Limit Switches
Hoist Upper and Lower Limit Switches: Stop the hoist when the hook reaches its highest or lowest safe position to prevent damage or accidents.

Trolley Travel Limit Switches: Prevent trolley from traveling beyond the ends of the main beam.

Crane Travel Limit Switches: Prevent crane from traveling beyond the runway rails.

3. Emergency Stop (E-Stop)
Large, easily accessible buttons on control panels and pendant controls.

Instantly cuts all power to the crane motors for immediate shutdown in emergencies.

4. Anti-Collision Devices (Optional)
Sensors or mechanical bumpers that detect obstacles and stop crane movement to prevent collisions.

5. Sound and Light Alarm System
Audible alarms and flashing lights activate before and during crane movements to alert nearby personnel.

6. Phase Loss and Phase Sequence Protection
Protects motors from damage due to incorrect electrical supply, phase loss, or incorrect phase sequence.

11.Control Mode

1. Pendant Control (Wired Remote)
Description: A handheld control device connected to the crane by a flexible cable.

Features:

Push buttons or joysticks control lifting, trolley travel, and crane travel.

Emergency stop button integrated.

Simple, reliable, and widely used in workshops or factories.

Advantages:

Direct operator control near the load.

Lower cost and easy maintenance.

Limitations:

Operator mobility limited by cable length.

Potential cable wear or damage.

2. Radio Remote Control (Wireless)
Description: A wireless handheld controller that sends commands via radio signals.

Features:

Full control of all crane movements without cable restrictions.

Emergency stop and safety interlocks included.

Longer operating range, typically up to 100 meters or more.

Advantages:

Greater operator freedom and safety (can stand clear of the load).

No cable tangling or wear issues.

Limitations:

Requires batteries and regular charging.

Potential interference in noisy RF environments.

3. Cabin Control
Description: Operator sits inside a cabin mounted on the crane.

Features:

Joystick or lever controls for hoist, trolley, and crane travel.

Climate control for comfort in harsh environments.

Good visibility of the load and surroundings.

Advantages:

Comfortable for long operation periods.

Safe from weather and noise.

Limitations:

More expensive and complex to install.

Less suitable for small workshops or short-span cranes.

4. Automated / PLC Control
Description: Programmable Logic Controllers (PLC) and automation systems control crane movements.

Features:

Pre-programmed lifting sequences and positioning.

Integration with factory automation, sensors, and safety systems.

Data logging and diagnostics.

Advantages:

Precise, repeatable movements.

Reduced human error and increased efficiency.

Limitations:

High initial setup cost.

Requires skilled programming and maintenance.

Sketch

Main technical

 

 

1. Simple and Cost-Effective Design
Single girder structure means less steel and materials, reducing manufacturing and installation costs.

A-frame legs provide strong support without complex foundation requirements.

2. Good Load Capacity
Supports loads up to 15 tons, suitable for medium-duty lifting in various industries.

Reliable for handling heavy materials with stable performance.

3. Versatile Application
Can be used indoors or outdoors on flat surfaces.

Ideal for warehouses, workshops, shipping yards, construction sites, and manufacturing plants.

4. Easy Installation and Maintenance
A-frame design offers good stability with relatively simple assembly.

Accessible components make routine inspection and maintenance straightforward.

5. Space Efficient
Single girder saves vertical space compared to double girder cranes.

Suitable for facilities with height restrictions.

6. Flexibility in Control Modes
Supports pendant, radio remote, cabin, or automated controls, allowing customization to operational needs.

7. Good Mobility
Equipped with robust wheels and traveling mechanisms, it can move along runway rails efficiently.

Suitable for frequent repositioning within a site.

 

1. Manufacturing Plants
Handling heavy raw materials and finished products.

Loading/unloading machinery parts, metal sheets, and fabricated components.

Assembly line assistance for medium-duty lifting.

2. Warehouses and Storage Yards
Moving heavy pallets, containers, and equipment.

Stacking and organizing goods efficiently.

Facilitating loading/unloading trucks or railcars.

3. Construction Sites
Transporting construction materials like steel beams, concrete blocks, and large pipes.

Assisting in erection of structures and scaffolding.

4. Shipyards and Ports
Handling cargo containers, heavy ship parts, and loading/unloading vessels.

Maintenance tasks involving heavy equipment handling.

5. Automotive Industry
Lifting engines, chassis, and large components during vehicle assembly or repair.

6. Metal Fabrication and Steel Industry
Moving heavy coils, plates, and fabricated steel components.

Supporting welding, cutting, and assembly operations.

 

 

1. Design & Engineering
Create detailed technical drawings and 3D models.

Perform structural analysis and stress calculations.

Select appropriate materials and components.

Plan production workflow and quality control points.

2. Material Procurement
Source high-quality steel plates, profiles, motors, electrical parts, and accessories.

Verify material certifications and compliance with standards.

3. Cutting & Preparation
Cut steel plates and profiles for main beam, legs, end carriages, and trolley parts using CNC cutting or plasma cutting.

Prepare components by cleaning, deburring, and pre-fitting.

4. Welding & Assembly
Weld the main girder, A-frame legs, and end carriages according to welding procedures.

Use fixtures and jigs to ensure dimensional accuracy and alignment.

Inspect weld quality via visual and non-destructive testing (NDT) methods like ultrasonic or magnetic particle inspection.

5. Machining
Machine critical parts such as wheel seats, motor mounts, and shaft holes.

Ensure precise fitting and smooth operation.

6. Surface Treatment
Clean and sandblast steel surfaces to remove rust and scale.

Apply primer and anti-corrosion paint coatings according to specifications.

Optional: Apply additional layers like polyurethane or epoxy paint for outdoor use.

7. Component Assembly
Install wheels, motors, hoisting mechanism, electrical wiring, limit switches, and safety devices.

Assemble the trolley and hook block.

8. Electrical System Installation
Wire motors, control panels, alarm systems, and limit switches.

Install control mode devices (pendant, radio remote, cabin controls).

Perform insulation and continuity tests.

9. Testing & Inspection
Conduct no-load functional tests for hoisting, trolley, and crane traveling.

Perform load testing with gradually increasing weights up to 125% of rated capacity.

Check all safety devices, alarms, and limit switches for proper operation.

Record test data and certify compliance with relevant standards.

10. Final Adjustments & Packaging
Make any necessary adjustments to mechanical and electrical components.

Clean and prepare the crane for shipment.

Package components securely to prevent damage during transport.

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%.