Minimum safety factor for lifting personnel using 6x19 rope?

Minimum safety factor for lifting personnel using 6x19 rope?

• A. 5 to 1
• B. 9 to 1
• C. 7 to 1
• D. 6 to 1

Answer: (C)

Lifting personnel requires a generous safety margin to protect lives against dynamic loads, shock, wear, and potential equipment faults. For wire rope used in lifting people, the standard minimum safety factor is seven to one. That means the working load limit is set so that it is at most one seventh of the rope’s breaking strength, providing enough margin to absorb sudden loads if the lift experiences acceleration, deceleration, or partial rope damage. The six-by-nineteen rope construction describes how the rope is built (six strands of nineteen wires each), which influences flexibility and wear characteristics but does not change the requirement for a large safety factor when people are being hoisted. So, for lifting personnel, seven to one is the appropriate minimum, ensuring a robust buffer against real-world loading conditions.

Lifting personnel requires a generous safety margin to protect lives against dynamic loads, shock, wear, and potential equipment faults. For wire rope used in lifting people, the standard minimum safety factor is seven to one. That means the working load limit is set so that it is at most one seventh of the rope’s breaking strength, providing enough margin to absorb sudden loads if the lift experiences acceleration, deceleration, or partial rope damage.

The six-by-nineteen rope construction describes how the rope is built (six strands of nineteen wires each), which influences flexibility and wear characteristics but does not change the requirement for a large safety factor when people are being hoisted. So, for lifting personnel, seven to one is the appropriate minimum, ensuring a robust buffer against real-world loading conditions.