What is the maximum stretch percentage for STATIC kernmantle rope under load?

What is the maximum stretch percentage for STATIC kernmantle rope under load?

• A. 10%
• B. 40%
• C. 20%
• D. 60%

Answer: (C)

Static kernmantle rope is designed to stretch very little under load. This low elongation keeps rope lengths predictable during rescue, lowering, or fixed-line work, which is essential for safety and accuracy. Unlike dynamic rope, which is meant to stretch a lot to absorb shock, static rope maintains its length when forces are applied. In practical terms, the elongation of a static rope under typical rated loading is only a few percent—usually around 2 to 3 percent, and most specifications cap it around 5 percent. So the maximum stretch you would expect is on the order of a few percent, not tens of percent.

Static kernmantle rope is designed to stretch very little under load. This low elongation keeps rope lengths predictable during rescue, lowering, or fixed-line work, which is essential for safety and accuracy. Unlike dynamic rope, which is meant to stretch a lot to absorb shock, static rope maintains its length when forces are applied. In practical terms, the elongation of a static rope under typical rated loading is only a few percent—usually around 2 to 3 percent, and most specifications cap it around 5 percent. So the maximum stretch you would expect is on the order of a few percent, not tens of percent.