The choose and buy of power line standards and performance characteristics

by:SanTong     2021-02-04
The rope is the important equipment of rock climbing activity. Power cord can scale absorption loss of momentum and the aiding fall protection. Choose a safe and effective power cord is therefore the most urgent task for many climbers. UIAA standards of the power line design standards: is a 80 kg of climber off when falling coefficient of 2, the impact of the on its own no more than 12 kn ( The body's stress limit, the experiment on the surface of the human body can withstand the impact of the 12 kn) in a short time , and to realize this purpose is done by the elasticity of the main line, power cord like a bungee cord to absorb a sudden impulse. Power line: the main line, Power cord) Is the core of the whole rock climbing protection system, the design criterion of dynamic rope UIAA standards: is a 80 kg of climber off when falling coefficient of 2, the impact of the on its own no more than 12 kn ( The body's stress limit, the experiment on the surface of the human body can withstand the impact of the 12 kn) in a short time , and to realize this purpose is done by the elasticity of the main line, power cord like a bungee cord to absorb a sudden impulse. All other equipment is around the premise to design. Long rope can extend more, absorb more energy, which is why falling coefficient of the same four meters off and 20 meters off the impact is as big as ( Falling coefficient is 2, the force of about 9 kn) 。 Static rope: traditional use in caving, rescue, but now is often used in the high altitude downhill, even in the climbing gym could be used as a head line protection; Static rope design for elastic with as small as possible, so that it can hardly absorb shock; And the static line is not like the power cord has a complete industrial system standard, so different vendors, different countries and regions of static rope its elasticity may have very big difference. Static rope like cables, pass all the impact of direct to protect system and fall off, in this case even if a short fall will create a very big impact on the system. Rope and sling as static rope, they also have no ductility, can be seen in the falling coefficient section when using a static line protection off the impact can be made by sling, seat belts, chains, such as equipment failure, the impact of the more dangerous is such a big waist fractures can directly make off. Under the static line protection, a shorter than 1. 2 meters off is likely to fall off and its serious harm, and even endanger the safety of life. Characteristics: 1, the fine diameter power cord ( Designed for rock climbers) Resistance to impact number is 6 - Eight times. 2, medium power cord impact resistance of 10 - diameter 11 times. 3, thick diameter power cord impact number is 16 - resistant 17 times.
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