Sling angles less than 30 degrees should not be used unless approved by a qualified person.

• A. 15 degrees
• B. 25 degrees
• C. 30 degrees
• D. 45 degrees

Answer: (C)

Sling angle affects the force in each leg of the lift: as the angle toward the vertical gets smaller, the tension in the legs increases, meaning you must rely on higher capacity and stricter oversight. The rule sets a minimum of 30 degrees, so any angle below that should not be used unless a qualified person approves the lift. Therefore, 30 degrees sits at the threshold and can be used without special approval, while angles smaller than 30 would require approval. Angles larger than 30 are also acceptable, but the key point is that 30 degrees is the minimum that does not automatically require approval.