Note:
Spread Angle Factor Formula: The tensile force on the anchor is affected by the spread angle of the cables. The formula helps determine the correct force distribution.
Spread Angle Factor Table:
| Angle β (degrees) |
Spread Factor (z) |
| 0° | 1.00 |
| 5° | 1.003 |
| 10° | 1.015 |
| 15° | 1.035 |
| 20° | 1.064 |
| 25° | 1.103 |
| 30° | 1.154 |
| 35° | 1.220 |
| 40° | 1.305 |
| 45° | 1.414 |
Key Parameters That Affect Calculation:
- Total Load (Ftot): The weight of the lifted object in kN.
- Cable Angle (β): The angle between the cables and the object. (Preferred β < 30°)
- Spread Angle Factor (z): A multiplier based on β (from table).
- Number of Load Anchors (n): The count of load-bearing points.
Real-Life Applications:
- Construction: Used in tower crane lifting operations.
- Shipping: Ensuring safe handling of large cargo.
- Manufacturing: Lifting machinery parts safely.
Conclusion:
Using the spread angle factor formula ensures safety, prevents overloading, and improves efficiency in lifting operations.