Lowering 150 kg - 250 kg with the I'D S on the anchor
Above 150 kg, descent control becomes very difficult. It is recommended to take technical measures to improve braking.
- Read the technical notice before viewing the following techniques.
- It is important to fully understand the information provided in the technical notice before using this complementary information
- Mastering these techniques requires training.
- Consult a professional before attempting to perform these techniques on your own.
Factors affecting the difficulty of a descent:
- Increased load.
- Wear state of the I'D used.
- Diameter and condition of the rope used (new ropes tend to be slippery).
- High rate of descent
- Friction in the system: if the rope path passes through directional points, there is more friction than if the mass is directly suspended.
Techniques to improve braking:
- Use of a rope greater than 10.5 mm in diameter.
- Two-person operation.
- Munter hitch on the braking carabiner.
In the most critical situations, it is necessary to use all three techniques combined.
250 kg mass hanging freely with no directional point:
In less critical situations, too much friction can be a handicap. Thus it is recommended to use only two of the braking improvement techniques.
250 kg mass with a directional point:
The directional point provides additional braking.
Mass greater than 150 kg hanging freely with no directional point:
A mass of less than 200 kg requires less braking force.
- Release and rescue of a victim on a fall arrest system, by two co-workers
- Lowering a person with the I'D on the rescuer's harness
- Pre-installed individual evacuation kit
- Release and rescue of a co-worker using a rescue kit
- Release and rescue of a co-worker suspended on a static support.
- Release and rescue of a co-worker suspended on a long rope
- Accompanied descent rescue with the I'D
- Drop loop haul on the I'D for urgent rescue, with ASAP
- Litter hauling techniques