In kernmantle rope construction, which component carries most of the rope's strength?

• A. Kern
• B. Sheath
• C. Mantle
• D. Core

Answer: (A)

In kernmantle rope, the load-bearing part is the kern, the internal core fibers. These core fibers carry most of the rope’s tensile strength, while the outer protective layer—the mantle (also called the sheath)—protects the core from abrasion and damage and helps with handling. So the rope’s strength comes primarily from the core, not the outer cover. If the core is damaged, the rope loses most of its strength; damage to the sheath mainly affects durability and wear resistance.