How does synthetic fire rope compare to natural rope?

How does synthetic fire rope compare to natural rope?

• A. It has a smaller diameter than a natural fiber rope of equal strength
• B. It is weaker
• C. It is heavier
• D. It has more stretch

Answer: (A)

The key idea is strength per diameter. Synthetic fire ropes use fibers with higher tensile strength, so you can achieve the same overall breaking strength with a smaller diameter. That means the rope is thinner and typically lighter, while still meeting the required performance. Natural fiber ropes, like Manila or cotton blends, don’t pack strength as efficiently by cross-section, and they’re more prone to moisture uptake and creep, which can reduce effective strength. So for the same strength level, a synthetic rope is thinner and lighter, not weaker, heavier, or more stretch.