Difference Between Single Girder and Double Grinder Cranes

Understanding the distinction between single girder and double girder overhead cranes is essential for choosing the right solution for your operational needs. Both types vary in structure, capacity, cost, and application, influencing facility efficiency and productivity.

Single Girder Cranes

• Structure: One main girder with an underslung hoist running along the lower flange.


• Capacity: Lifts up to 20 tons; spans up to 20 meters.


• Height: Reduced lifting height due to the hoist’s position below the girder.


• Advantages:
  
  
  
  • Cost-effective and simpler design.
  
  
  • Lower dead weight and easier installation.
  
  
  • Requires less maintenance.
  
  
  
  


• Limitations:
  
  
  
  • Lower lifting capacity and hook height.
  
  
  • Limited customization options.
  
  
  
  

Double Girder Cranes

• Structure: Two girders with a hoist on rails atop the girders.


• Capacity: Lifts heavy loads (20 to over 100 tons); spans over 30 meters.


• Height: Higher hook height, ideal for facilities with high ceilings.


• Advantages:
  
  
  
  • Greater lifting capacity and height.
  
  
  • Enhanced durability and stability.
  
  
  • Extensive customization options (e.g., walkways, platforms).
  
  
  
  


• Limitations:
  
  
  
  • Higher cost and dead weight.
  
  
  • More complex installation.
  
  
  
  

Key Differences

• Capacity: Single girder for lighter loads; double girder for heavy-duty lifting.


• Height: Double girder provides higher hook height.


• Span: Single girder suits shorter spans, while double girder handles larger spans.


• Cost: Single girder is more economical; double girder offers higher performance.


• Customization: Double girder allows more features and flexibility.

Choosing the Right Crane

• Light Loads: Single girder for up to 20 tons.


• Heavy-Duty Needs: Double girder for heavy loads and long spans.


• Budget: Single girder for cost-effectiveness; double girder for durability.


• Space: Double girder for larger, high-ceiling facilities.

Conclusion

Single girder cranes are ideal for cost-conscious operations with light lifting needs, while double girder cranes offer robust solutions for demanding applications requiring greater capacity and customization.

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