Which value describes static stretch of kernmantle rope?

Which value describes static stretch of kernmantle rope?

• A. 5%
• B. 10%
• C. 15%
• D. 20%

Answer: (D)

Static stretch is how much a rope lengthens when it’s kept under a constant load for a period of time. It reflects creep and elastic deformation under a sustained force, and is expressed as a percentage of the rope’s original length. Kernmantle rope, with its core and outer sheath, will slowly elongate under load as the fibers rearrange and creep. In the standard ranges used for kernmantle ropes, the static elongation under a sustained load is about 20% of the original length. So, describing static stretch as around 20% captures the typical amount of length increase you’d expect when the rope is held steady under load, distinct from the additional elongation that can occur during a sudden fall or shock load (dynamic stretch).

Static stretch is how much a rope lengthens when it’s kept under a constant load for a period of time. It reflects creep and elastic deformation under a sustained force, and is expressed as a percentage of the rope’s original length.

Kernmantle rope, with its core and outer sheath, will slowly elongate under load as the fibers rearrange and creep. In the standard ranges used for kernmantle ropes, the static elongation under a sustained load is about 20% of the original length. So, describing static stretch as around 20% captures the typical amount of length increase you’d expect when the rope is held steady under load, distinct from the additional elongation that can occur during a sudden fall or shock load (dynamic stretch).