For movement in the tree, the arborist can move along a single work rope. The rope must be taken up as the arborist moves: there should never be a loop of slack between the anchor and the arborist.
Note: in this document the name ZIGZAG means either the ZIGZAG or ZIGZAG PLUS models.
Moving away from the trunk
- Normal handling
- In case of a fall, there is a risk of clenching the hand on the rope and not being able to stop the fall
Returning to the trunk in double mode
The doubled rope enables self-hauling which reduces the effort needed to climb.
Warning: risk of creating a loop of slack between your hands and the device, increasing the potential fall distance.
In case of a fall, there is a risk of clenching the hand on the rope and not being able to stop the fall
Note: in certain situations, with sufficient rope weight, this technique can facilitate returning to the trunk, with the rope self-feeding through the ZIGZAG. But beware if moving quickly, and remember to monitor for the possible development of a loop of slack.
Returning to the trunk in single mode
Normal handling. On a single rope the arborist must pull 100% of his/her weight with each movement.
Warning: if the user moves without taking up rope, risk of creating a loop of slack between the device and the anchor, increasing the potential fall distance.