Crane Operator Certification Exam Prep · Question
A crane operator is lifting a 2,000 kg load using a two-leg bridle sling. The sling legs are attached to the load such that the angle between each sling leg and the vertical is 30 degrees. What is the approximate tension in each sling leg?
To calculate the tension in each sling leg, use the formula Tension = (Load Weight / Number of Legs) / cos(angle from vertical). Here, Tension = (2000 kg / 2) /
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Question: A crane operator is lifting a 2,000 kg load using a two-leg bridle sling. The sling legs are attached to the load such that the angle between each sling leg and the vertical is 30 degrees. What is the approximate tension in each sling leg?
Answer options: ✅ 1,154 kg
- 1,000 kg
- 1,414 kg
- 2,000 kg
Correct answer: 1,154 kg
Explanation: To calculate the tension in each sling leg, use the formula Tension = (Load Weight / Number of Legs) / cos(angle from vertical). Here, Tension = (2000 kg / 2) / cos(30°) = 1000 kg / 0.866 ≈ 1,154 kg. If the angle was 0, the tension per leg would be 1000 kg.
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- A crane's rated capacity decreases as the load radius:
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