Using the ASAP and ASAP LOCK when approaching an obstacle or the ground
Warnings
- Carefully read the Instructions for Use used in this technical advice before consulting the advice itself. You must have already read and understood the information in the Instructions for Use to be able to understand this supplementary information.
- Mastering these techniques requires specific training. Work with a professional to confirm your ability to perform these techniques safely and independently before attempting them unsupervised.
- We provide examples of techniques related to your activity. There may be others that we do not describe here.
Clearance is the minimum amount of clear space below the ASAP that prevents the user from hitting an obstacle in the event of a fall.
The clearance values to be considered during use are specified in the Instructions for Use for the ASAP and ASAP LOCK fall arrest devices and compatible ASAP'SORBERs.
1. To limit the clearance distance, limit the potential fall distance.
The position of the ASAP or ASAP LOCK relative to the user affects the fall distance and therefore the tearing length of the energy absorber; both of these factors increase the clearance.
Keep the ASAP or ASAP LOCK above the attachment point of your harness as much as possible.
During movement, position the ASAP or ASAP LOCK over the shoulder.
During ascents, the user tends to climb above the ASAP or ASAP LOCK. Remember to regularly move it up as high as possible and before any technical maneuver (e.g., passing an obstacle, changing direction). Most harnesses have a loop on the shoulder strap that allows the ASAP or ASAP LOCK to be kept in a high position without having to manipulate it while ascending.
At the workstation: deliberate blocking of the ASAP or ASAP LOCK in a high position
With ASAP LOCK, use the locking function. Remember to deactivate this function before starting a descent. With ASAP, a quick downward pull blocks it in the desired position. Remember to unlock the wheel before starting a descent.
2. Do not disregard rope stretch (E)
The clearance values provided in the Instructions for Use do not take rope stretch into account. Rope stretch adds a variable to the clearance, depending on the distance to the anchor. Only the user can assess rope stretch based on their situation and equipment: consult the Instructions for Use for your rope to find out its elasticity.
For example, if we consider an elongation value of 10% during a fall:
- At 10 m from the anchor, 1 m must be added to the clearance.
- At 50 m from the anchor, 5 m must be added to the clearance.
If rope stretch has too great an impact on your clearance, use intermediate anchors to rebelay the rope when possible.
3. Monitor the rope tension
It is important to make sure the rope is properly sliding through the ASAP, to avoid creating slack that can increase the potential fall distance.
