What is the safety factor for rotation resistant rope?

• A. 3 to 1
• B. 4 to 1
• C. 5 to 1
• D. 2 to 1

Answer: (C)

In lifting and rigging, the safety factor tells you how much stronger the rope is than the maximum load you expect to put on it. Rotation-resistant rope is designed to minimize twisting under load, which helps prevent wear and fatigue and keeps the rope looping in a controlled way.

Because lifting involves dynamic and shock loads and potential wear from bending, a larger margin is used to ensure reliability over time. Five to one provides a safe, practical cushion between the rope’s breaking strength and the actual working load, accounting for wear, snagging, and unexpected peak forces.

So, the safety factor for rotation-resistant rope is five to one. Lower factors would not give enough margin for these dynamic conditions.