🏗️ Choker Single Leg Hitch: Calculation Guide for Safe Lifting
The Choker Single Leg Hitch is a commonly used method in lifting operations for handling pipes, beams, and scaffold jacks. It involves looping the sling around the load and back through one of its ends or a choker hook. While effective, this method reduces the safe lifting capacity due to added tension and pressure on the sling.
🎯 When to Use It?
Lifting cylindrical items like pipes and scaffold jacks
When a secure grip is needed around the object
In scenarios where a standard vertical lift isn’t practical
⚠️ Key Safety Factors
| Factor | Explanation |
|---|---|
| Mode Factor | 0.8 (reduces effective capacity by 20%) |
| Rated Capacity | 80% of single part vertical lift |
| Gear Safety Margin | Lifting gear must be rated at 1.25x load weight |
| SWL Deduction | 20% of the gear’s SWL must be deducted |
🧮 Example Calculations
▶️ Example 1:
Load Weight: 1000 kg
Required Sling Rating: 1000 / 0.8 = 1250 kg
Lifting Gear Capacity: 1.25 × 1000 = 1250 kg
Usable SWL after 20% Deduction: 1250 × 0.8 = 1000 kg
▶️ Example 2:
Load Weight: 1500 kg
Required Sling Rating: 1500 / 0.8 = 1875 kg
Lifting Gear Capacity: 1.25 × 1500 = 1875 kg
Usable SWL after 20% Deduction: 1875 × 0.8 = 1500 kg
📊 Download Excel Calculator
Speed up your lifting calculations with our free spreadsheet:
📥 Choker Hitch Calculator (Excel)
🖼️ Visual Guide
Here’s a helpful diagram that illustrates how the Choker Hitch works:
✅ Conclusion
The Choker Hitch is a practical method for lifting awkward loads — but safety is critical. Always apply the correct mode factor and safety margins, and double-check your sling and gear capacities.
💬 What Do You Think?
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🔗 Visit EngineerHow.com for more lifting guides and engineering tutorials.
