Using static or low-stretch ropes for lifelines reduces fall distance when compared to dynamic ropes. True or false?

Using static or low-stretch ropes for lifelines reduces fall distance when compared to dynamic ropes. True or false?

• A. True
• B. False
• C. Not enough information
• D. It depends on weight

Answer: (A)

Fall distance hinges on how much the rope can stretch under load. Static or low-stretch lifelines elongate very little, so once taut they arrest the fall quickly, resulting in a shorter fall distance. Dynamic ropes are designed to stretch to absorb energy, which means the climber may continue to descend farther before the rope fully arrests, increasing fall distance but reducing peak forces. So, for lifelines used to limit how far a person can fall, static or low-stretch rope does reduce fall distance compared with dynamic rope.

Fall distance hinges on how much the rope can stretch under load. Static or low-stretch lifelines elongate very little, so once taut they arrest the fall quickly, resulting in a shorter fall distance. Dynamic ropes are designed to stretch to absorb energy, which means the climber may continue to descend farther before the rope fully arrests, increasing fall distance but reducing peak forces. So, for lifelines used to limit how far a person can fall, static or low-stretch rope does reduce fall distance compared with dynamic rope.