Climbing ropes are made to absorb the force of a fall. To absorb the force of a fall, ropes must stretch. The ability of a climbing rope to stretch is called the dynamic quality. Climbing ropes stretch under impact force, but should remain static under a load. The Union Internationale Des Association D'Apinisme (UIAA) provides a testing standard for climbing ropes. To pass the minimum requirements, ropes must not break after 5 test falls with 12 kN impact force. Ropes are made to conform to specifications. Climbing rope test specifications are listed below.
Stinger III 9.4mm Golden Dry Rope
More...Created to give sport and trad climbers an ultralight line that won’t be pull off your harness. Features a Golden Dry treatment for wet alpine climbing, and a center mark to help you set up rappels quickly.
Flyer II 10.2mm Dry Cover Climbing Rope
More...Has a moderate diameter and protective dry cover sheath. It is ideal for any climbing requiring use of a rope. It has a low weight and progressive diameter between traditional climbing ropes and new thin ropes.
Sterling Marathon Mega Climbing Rope
More...It has a durable sheath that stands up to almost any abuse you can give it, and it handles easily. There is a dry treatment that keeps the interior of the rope dry leaving it flexible and strong.
Sterling BiAthlon Pro Rope
More...The dual-pattern sheath on the Sterling BiAthlon Pro 10.1mm Rope makes the center point stick out. This will help you locate it quickly and gives you a cue that you have enough to finish out and lower down.
Petzl Nomad Climbing Rope
More...The Petzl Nomad Climbing Rope is a lightweight climbing rope at just 9.8mm in diameter. THe smooth-handling cord provides features of skinny ropes and older fat ropes. It is durable and has the Duratec dry treatment that coats both the sheath and the core.
Climbing Rope Testing. Indicates the type of test performed. There are two types of tests: “single” or “half”.
Impact Force. This is the amount of force a climbing rope is able to absorb. high numbers indicate more force is transferred to the climber. Low numbers indicate better performance. The highest acceptable impact force is 8 kN for the half rope test and 12 kN for a single rope test.
Elongation. This defines the dynamic qualities of the climbing rope. Elongation is the length a climbing rope will stretch. It is expressed as a percentage. The test is performed by attaching an 80 kilogram object to the rope. The rope’s length is measured with the object attached. The maximum elongation for single ropes is 8%. The maximum elongation for half ropes is 10%.
Number of Falls. This test is performed by attaching an 80 kilogram object to a climbing rope. The rope is 2.8 meters long. The object is dropped 5 meters. This test is repeated until the climbing rope breaks. Ropes must survive 5 falls to pass the test.
Usage. The type of climbing. Different types of climbing require different characteristics in the rope.
Weight per meter. Weight in grams for a meter of climbing rope.
Center Marked. This is listed as “yes” or “no”. Some climbing ropes mark the center.
Length. Measured in meters.
Thickness. Measured in millimeters.
Water Resistance. characteristics of a climbing rope to repel water.