Examples of ZIGZAG handling - Petzl USA
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Examples of ZIGZAG handling

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.

Warnings

  • 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.



Note: in this document the name ZIGZAG means either the ZIGZAG or ZIGZAG PLUS models.

Moving away from the trunk

Moving away from the trunk 1/5
Moving away from the trunk 2/5

Normal handling

Moving away from the trunk 3/5

In case of a fall, there is a risk of clenching the hand on the rope and not being able to stop the fall

Moving away from the trunk 4/5

Normal handling

Moving away from the trunk 5/5

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

Returning to the trunk in double mode 1/3
Returning to the trunk in double mode 2/3

Normal handling.

The doubled rope enables self-hauling which reduces the effort needed to climb.

Returning to the trunk in double mode 3/3

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

Returning to the trunk in single mode 1/4
Returning to the trunk in single mode 2/4
Returning to the trunk in single mode 2/4

Normal handling. On a single rope the arborist must pull 100% of his/her weight with each movement.

Returning to the trunk in single mode 3/4

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.