🔍 Introduction
When lifting cylindrical objects like pipes, scaffold jacks, or beams, using a Doubled Single Leg Choker is a common and effective method. But calculating the right capacity of the lifting gear is crucial to ensure safety and compliance with lifting standards.
In this guide, we’ll walk through:
The mode factor
How to calculate gear capacity
Provide worked examples
A helpful diagram
And a downloadable Excel sheet to automate the process
⚙️ Use Case
The Doubled Single Leg Choker is used when:
Lifting round or cylindrical objects
A secure grip is required using a single sling doubled back around the object
You want a quick and relatively strong lift setup
📐 Formula & Explanation
For Doubled Single Leg Choker:
Mode Factor = 1.6
Lifting Gear Capacity = 0.625 × Weight of the Load
🔎 This factor accounts for the way the sling is wrapped and the resulting load distribution.
🧮 Example Calculations
| Load Description | Load Weight (kg) | Capacity Required (kg) |
|---|---|---|
| Steel Pipe | 1000 | 625 |
| Scaffold Beam | 1800 | 1125 |
| Concrete Tube | 2500 | 1562.5 |
✅ Always ensure the sling and shackles are rated at or above the required capacity.
🧰 Diagram
📊 Download the Excel Template
We’ve created an easy-to-use Excel file. Just enter the weight of your load, and it calculates the required capacity instantly:
📥 Click to Download Excel Calculator
📝 Conclusion
Using the correct mode factor and calculating lifting gear capacity ensures safer operations and compliance with lifting regulations. The Doubled Single Leg Choker is reliable — if calculated and applied correctly.
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