1. What is the Web Sling Load Formula?

The Web Sling Load Formula calculates the tension (T) in each leg of a web sling when lifting a load. It considers the total load weight (W), number of legs (n), and the angle (α) at which the sling is used.

2. How Does the Calculator Work?

The calculator uses the web sling tension formula:

Where:

• \( T \) — Tension in each sling leg (N or lb)
• \( W \) — Total load weight (N or lb)
• \( n \) — Number of sling legs
• \( \alpha \) — Angle between sling leg and vertical (degrees)

Explanation: The formula distributes the total load among the sling legs and accounts for the increased tension caused by the angle of the sling.

3. Importance of Tension Calculation

Details: Accurate tension calculation is crucial for selecting appropriate sling capacity, ensuring safe lifting operations, and preventing equipment failure or accidents.

4. Using the Calculator

Tips: Enter total load weight in N or lb, number of sling legs, and the angle in degrees (between 0-90°). All values must be valid (load > 0, legs ≥ 1, angle 0-90°).

5. Frequently Asked Questions (FAQ)

Q1: Why does the angle affect the tension?
A: As the angle increases from vertical, the tension in each sling leg increases because the load is distributed less efficiently.

Q2: What is the optimal sling angle?
A: The optimal angle is typically 60° or less. Angles greater than 60° significantly increase tension and reduce lifting capacity.

Q3: How do I measure the sling angle?
A: Measure the angle between the sling leg and a vertical line. Use an angle finder or protractor for accurate measurement.

Q4: Are there safety factors to consider?
A: Yes, always apply appropriate safety factors based on industry standards and the specific lifting application.

Q5: Can this formula be used for all sling types?
A: This formula applies to web slings and similar flexible slings. Different formulas may be needed for chain slings or wire rope slings.