What is the rating of the CMC lifeline?

• A. 40 kN Rating (8992 lbf)
• B. 44 kN Rating (9891 lbf)
• C. 41 kN Rating (9217 lbf)
• D. 42 kN Rating (9390 lbf)

Answer: (A)

The rating on a lifeline is its breaking strength—the maximum force the line is certified to withstand before it would fail in testing. For the CMC Lifeline, that rating is 40 kN, which is about 8,992 pounds of force. This value reflects the standard test where the line is subjected to increasing load until it breaks, and 40 kN is the specified limit for this product. The other numbers would imply higher breaking strengths, but they don’t match the manufacturer’s specification for this lifeline. Remember, this rating is about ultimate strength, not the safe working load used in daily operations, which is kept well below this value with an appropriate safety margin.