Tensile or Breaking Strength 7/16” – 6,000 lbs 1/2” – 9,000 lbs 5/8” – 13,000 lbs Working Strength = Tensile / 15Ĭlass 1 (Light use) – One person life safety rope w/ > 300 lbs working strength Class 2 (General use) – Two person life safety rope w/ > 600 lbs working strength Note: Life Safety Rope must have an internal tracer tape indicating complianceħ Inspection and Care Use manufacturer's recommendations PHTLS, Mosby, Fourth EditionĤ Ropes Used In Rescue Static Kern mantle Dynamic Kern mantleįiber bundles run parallel Stretches no more than 20% Known as “low-stretch rope” Dynamic Kern mantle Made of twisted strands Stretches as much as 60% Known as “high-stretch rope” NFPA 1006, Standard for Rescue Technician Professional Qualifications, 2001 ed. Knowledge of rope types & strengths Tying basic knots Knowledge of rope software & hardware Knowledge and use of anchoring points Constructing mechanical advantage systems Basket operationsģ References NFPA 1983, Standard on Fire Service Life Safety Rope and System Components, 2001 Edition Rescue Technician Instructor Guide, Department of Defense Fire Academy Fire Service Rescue, Sixth Edition, IFSTA NFPA 1670, Standard on Operations and Training for Technical Rescue Incidents, 1999 ed.

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