A double girder crane is an overhead crane designed with two parallel girders (beams) that support the bridge and the lifting mechanism. This configuration makes double girder cranes suitable for handling heavy loads and applications requiring increased lifting height, stability, and precision. Below are the primary uses and benefits of double girder cranes:
1. Handling Heavy Loads:
Double girder overhead cranes are ideal for applications that involve lifting and transporting very heavy loads, such as large machinery, heavy steel plates, coils, and structural components. They are commonly used in industries like steel manufacturing, heavy machinery assembly, and construction where high load capacities are required.
Typical load capacity: These cranes can lift heavy loads, often exceeding 20 tons and up to several hundred tons.
2. Increased Lifting Height:
The design of double girder bridge cranes allows for greater lifting heights compared to single girder cranes. This is achieved because the hook is mounted on the trolley, which runs along the top of the two girders. This provides more space between the hook and the ground, making them ideal for applications that require lifting large components or materials to significant heights.
Example applications: Moving large structural beams in construction or lifting heavy parts in power plants or shipyards.
3. Wider Span and Long Travel:
Double girder cranes can have a wider span and longer travel distance, allowing them to cover larger areas. This makes them suitable for large factory floors, warehouses, or areas where long-distance material handling is necessary.
Example: Handling long steel bars or large containers in manufacturing plants or port facilities.
4. Increased Stability and Safety:
The two girder configuration enhances the stability of the crane during lifting operations. The weight is distributed more evenly, reducing the likelihood of tilting or instability, particularly when lifting heavy or awkwardly shaped loads.
This makes double girder cranes safer for operations involving high-risk loads or precise positioning.
5. Higher Speed and Efficiency:
Double girder overhead travelling crane is capable of faster hoisting and traveling speeds because of their stronger structure. This makes them efficient for high-speed lifting operations, such as in automotive assembly lines or material handling in manufacturing plants.
6. Precise Load Handling:
Due to the robust and stable structure, double girder cranes can be used for precise positioning of loads, which is crucial in applications like machine assembly, maintenance of heavy equipment, or handling sensitive materials.
A double girder crane is used for lifting and transporting heavy loads in industries like manufacturing, construction, steel production, and shipbuilding. It offers higher load capacities, increased lifting height, greater stability, and more efficient operation compared to single girder cranes, making it an ideal choice for heavy-duty and high-precision applications.