What Is a Double Girder Gantry Crane?
A double girder gantry crane is a heavy-duty lifting crane that uses two parallel main girders supported by legs to lift and transport materials. Unlike overhead cranes that rely on building structures, a gantry crane has its own supporting legs and can operate independently on ground rails.
The double girder design provides higher strength, better stability, and larger lifting capacity compared with single girder gantry cranes. It is commonly used for heavy material handling applications where high load capacity, long spans, or frequent operation are required.
A typical double girder gantry crane consists of:
-Two main girders
-Supporting legs
-End trucks and travel system
-Electrical control system
During operation, the hoisting trolley moves along the two main girders to lift and position loads, while the entire crane travels along ground rails to cover the working area.
Structure and Features of Double Girder Gantry Crane
The main feature of a double girder gantry crane is its two-girder structure, which provides stronger load-bearing capability and improved operational stability.
The two main girders support the hoisting trolley and distribute the lifting load more effectively, making the crane suitable for heavy-duty working conditions.
Compared with single girder gantry cranes, double girder gantry cranes usually provide:
- Higher lifting capacity
- Longer span capability
- Better stability during operation
- Higher working duty performance
- More lifting height options
The crane configuration can be customized according to project requirements, including lifting capacity, span, lifting height, working duty, and operating environment.
Applications of Double Girder Gantry Crane
Double girder gantry cranes are mainly used in industries where heavy materials need to be moved safely and efficiently.
Common applications include:
Heavy Manufacturing
Used for handling large equipment, steel structures, machinery components, and production materials.
Steel and Metal Industries
Suitable for lifting steel plates, steel coils, fabricated structures, and other heavy products.
Outdoor Storage Yards
Because of its independent supporting structure, it is widely used in:
Material storage areas
Shipyards
Construction yards
Precast concrete plants
Large Equipment Maintenance
Provides reliable lifting support for heavy machinery installation and maintenance operations.
Double Girder Gantry Crane vs Single Girder Gantry Crane
The main difference between double girder and single girder gantry cranes is the number of main girders and their application range.
A double girder gantry crane is generally selected for projects requiring higher performance and continuous heavy lifting, while a single girder gantry crane is more suitable for general material handling applications.
| Comparison | Double Girder Gantry Crane | Single Girder Gantry Crane |
| Main structure | Two main girders | One main girder |
| Load capacity | Higher capacity | Light and medium duty |
| Stability | Higher | Suitable for general applications |
| Span capability | Longer spans | Standard spans |
| Working duty | Heavy-duty operation | Normal operation |
How to Choose the Right Double Girder Gantry Crane?
Choosing a suitable double girder gantry crane requires considering the actual working conditions rather than only the lifting capacity.
Important factors include:
Lifting Capacity
Determine the maximum load weight and consider future expansion requirements.
Span and Lifting Height
The crane size should match the working area and provide sufficient hook height for material handling.
Working Duty
Frequent operation and heavy-duty applications require stronger crane configurations and more durable components.
Application Environment
Consider whether the crane will operate indoors or outdoors, as environmental conditions may affect structural design and electrical components.
Travel Distance and Layout
The runway length, rail condition, and working area layout should be considered during crane design.
A professional crane manufacturer can help select the appropriate configuration based on the project requirements and ensure safe and efficient operation.
FAQ About Double Girder Gantry Crane
What is a double girder gantry crane?
A double girder gantry crane is a heavy-duty gantry crane that uses two parallel main girders to support the hoisting trolley and lift materials. It is designed for applications requiring higher capacity and stronger performance.
What is the difference between single and double girder gantry cranes?
The main difference is the number of main girders. Double girder gantry cranes use two girders, providing higher capacity and stability, while single girder gantry cranes are more economical and suitable for general lifting applications.
Where are double girder gantry cranes used?
They are widely used in heavy manufacturing, steel plants, shipyards, construction yards, equipment factories, and outdoor storage areas.
Are double girder gantry cranes suitable for outdoor use?
Yes. Double girder gantry cranes are commonly used outdoors. The design can be customized with suitable protection for weather conditions and specific working environments.
What information is needed to select a double girder gantry crane?
The main information includes:
-Lifting capacity
-Span
-Lifting height
-Travel length
-Working duty
-Application environment
-Power supply
