Rough terrain crane stability occurs when more loads than it should, and nearly involve two things: operating beyond the load chart at the actual working radius. This online calculator addresses the ground preparation side — how much pressure each outrigger is putting on the ground.
Outrigger Pad Sizing Reference
| Crane Class | Typical Max Outrigger Reaction | Min Pad Size (Firm Ground) | Min Pad Size (Soft Ground) |
|---|---|---|---|
| 25–40 ton RT crane | 150–280 kN | 0.6 m × 0.6 m | 1.0 m × 1.0 m + mat |
| 50–80 ton RT crane | 280–450 kN | 0.8 m × 0.8 m | 1.2 m × 1.2 m + mat |
| 100–150 ton RT crane | 450–700 kN | 1.0 m × 1.0 m | 1.5 m × 1.5 m + mat |
How to Calculate Crane Outrigger Load? RT Crane Stability & Ground Pressure Calculator
Essential Site Safety Analysis for Ground Bearing Pressure (GBP) & Mat Sizing
🛡️ Structural Stability Report
| Max Outrigger Point Load: | Tons |
| Ground Bearing Pressure: | kN/m² |
| Soil Stability Status: |
*Note: Outrigger load is estimated at 75% of combined weight during slewing operations. Ground Bearing Pressure (GBP) must be compared against the certified soil report of the site.
Try the above tool for the Rough-Terrain Crane stability and ground pressure. It ensures which machine is more useful as per the climate.
