VERTICAL LIFELINE ROPE - Ropes used for vertical lifelines require a minimum breaking strength at the termination of at least 22kN (5,000 lbs.). This means that ropes with spliced terminations must have a breaking strength of at least 27kN (6,000 lbs.). Lifelines should be made from synthetic rope, usually nylon, Poly Pro, or Poly Dac. Check rope grab operating instruction for the proper size and type of rope. Purchase SALA lifeline rope from Bairstow today.