Mountaineering equipment. It is divided into main rope and auxiliary rope. The length of the main rope is 60-100m, the diameter is about 10mm, the weight per meter is required to be about 0.08kg, and the tensile resistance is required to be no less than 1800 kg. In the past, jute was mostly used, but nylon fiber has been used as raw material recently. There is also a main rope with a diameter of 8-9 mm, which weighs 0.06 kg per meter and has a tensile strength of no less than 1600 kg. It is used to climb steep rock walls.
A 10kg weight is tied to the climbing rope and rubbed longitudinally on the rotating sand wheel, which directly causes the outer net of the rope to be damaged (that is, the rope is exposed white, which is often said by climbers). The time when the rope is worn directly reflects the longitudinal wear resistance of the rope. Generally speaking, the mountaineering power rope with perdur logo has more than 30% longer anti-wear time than other ropes in similar tests.
The sharp angle can have fatal consequences for the transverse cutting of the rope. It is easy to cut the rope with a sharp object when the rope is loaded. In the standard anti cutting test of uiaa, it is required to drop an 80 kg weight from a height of 5 meters and cut the rope at the edge of a sharp object with a radius of 5 mm placed laterally. In the first such experiment, the rope shall not be damaged. In this way, the anti cutting index test can be passed.
