🏗️ How to Calculate Capacity of Lifting Gears Using Doubled Single Leg Choker – With Diagram & Excel

🔍 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

✅ 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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