Choosing safe high-access rope
Choosing safe high-access rope
True Kernmantle Rope versus Double Braid Rope
True Kernmantle Rope
LSK, STATIC, ACCESS, LOW STRETCH
MULTIPLE COUNTER TWISTED (S AND Z) STRANDS/CORES AS THE INNER KERN WITH A TIGHTLY BRAIDED SHEATH.
Double Braid Rope
BRAID ON BRAID
A BRAIDED CORE WITH A BRAIDED SHEATH.
Strength & durability
- Strong, durable, with high abrasion resistance.
- Ability to retain its shape under rigorous conditions.
- Balanced twists prevent kinking.
- Inner core bears load while protected by the outer layer known as the sheath.
- Lower abrasion resistance, not as strong or durable.
- The lack of balance leaves the rope susceptible to kinks and twists.
- Vulnerable to unravelling if core cut.
- Both core and sheath contribute to strength.
Uses
Used in high-access climbing, repelling, caving, rescue operations, suitable for safety applications.
Commonly used in marine and general purpose applications, not suitable for safety-critical applications.
Safety aspect
In True Kernmantle rope, the presence of multiple cores provides enhanced safety and peace of mind in case of damage.
Even if only one core of the kern remains intact, the rope retains the capacity to support two individuals, ensuring safety even in scenarios where both the sheath and multiple inner cores are compromised.
Any cut which damages the core compromises the rope’s structural integrity, causing the braid to unravel.
TESTED AND CONTROLLED BY THE FOREMOST TESTING AUTHORITY IN THE WORLD.
LESS SUITABLE FOR HEIGHT SAFETY APPLICATIONS.
Nbi Specialised kernmantle high-access rope also offers:
WATER RESISTANCE
Resistant to swelling from water, retains stiffness.
HANDLE CHARACTERISTICS
Firm & dry handle, stiff and kink resistant due to high twist and fine yarns.
ABRASION RESISTANCE
High twist maximizes abrasion resistance.