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Warnings
This solution is described here because it is often seen in use. It has poor ergonomics and a high risk of error.
- Simplicity of the system and its installation - Low equipment cost
Disadvantages:
- The second rope cannot be considered a belay system unless the climber is continuously connected to it A Y-lanyard must be used and the user must be clipped to the next knot before unclipping from the last knot. - Average ease of use: the climber lifts the secondary rope with each move upwards, and supports its weight - In case topping out is necessary to exit the route, retrieving a rope with many knots in it could be complicated or even dangerous
Risks in case of primary ascender malfunction:
- Significant potential fall length - With an I-lanyard, the secondary belay system is not continuous Close to the belay station, there is a risk of a fall factor 1: beware if the rope is semi-static. With a static lanyard, the fall factor close to the belay station can be greater than 1. (A dynamic rope lanyard is preferred.)