Dynamic kernmantle rope stretches up to what percentage under load?

Dynamic kernmantle rope stretches up to what percentage under load?

• A. 10%
• B. 30%
• C. 50%
• D. 60%

Answer: (D)

Dynamic kernmantle rope is built to absorb energy by stretching when a load is applied. That stretch, or dynamic elongation, is what reduces the peak forces during a fall and helps protect both climber and gear. Under typical dynamic loading conditions, the rope can elongate quite a bit—up to about 60 percent of its original length. This large elongation is a hallmark of dynamic ropes, distinguishing them from static ones that stretch far less. Of course, the exact amount can vary with factors like rope size, age, moisture, temperature, and how the load is applied, but 60 percent represents the upper range seen in standard tests and specs.

Dynamic kernmantle rope is built to absorb energy by stretching when a load is applied. That stretch, or dynamic elongation, is what reduces the peak forces during a fall and helps protect both climber and gear. Under typical dynamic loading conditions, the rope can elongate quite a bit—up to about 60 percent of its original length. This large elongation is a hallmark of dynamic ropes, distinguishing them from static ones that stretch far less. Of course, the exact amount can vary with factors like rope size, age, moisture, temperature, and how the load is applied, but 60 percent represents the upper range seen in standard tests and specs.