Single Girder vs. Double Girder EOT Cranes
The definitive engineering guide to selecting the right crane architecture for your industrial facility.
Best for Small-Mid Units
The Single Girder Design
Optimized for light to medium duty cycles where building load capacity and budget are the primary constraints.
- Cost-effective fabrication
- Faster installation timeline
- Reduced dead weight on gantry
Best for Heavy Industries
The Double Girder Design
The gold standard for heavy engineering, large spans, and applications requiring maximum hook height.
- Superior lift height (hook travels between girders)
- Maximum stability for long spans
- Easiest maintenance access
The 'Hook Height' Advantage
The most critical technical difference is the **Effective Lift Height**. In a single girder crane, the hoist hangs below the main beam, consuming 600mm to 1000mm of vertical space. In contrast, a double girder crane allows the hoist to sit **between** the two beams, effectively reclaiming that space and allowing for higher stacking in your warehouse or facility.
Head-to-Head Comparison
| Parameter | Single Girder | Double Girder |
|---|---|---|
| Max Capacity | Up to 15 Tons | Unlimited (500+ Tons) |
| Max Span | Up to 20 Meters | Up to 50+ Meters |
| Dead Weight | Low | High (Requires heavy gantry) |
| Duty Class | M3 to M5 | M5 to M8 (Heavy Duty) |
| Price Index | 100% (Baseline) | 130% - 160% |
When to Choose Which?
Choose Single Girder if:
- Your facility is a warehouse with low height.
- Budget is the primary constraint.
- You are lifting under 10 tons.
- You need the crane installed quickly.
Choose Double Girder if:
- You need a walkway for safe maintenance.
- You are lifting heavy machinery (20+ tons).
- Your span exceeds 25 meters.
- High precision and duty cycles (3 shifts).