Understanding and optimizing clearance with ABSORBICA-I and Y - Petzl United Kingdom
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Understanding and optimizing clearance with ABSORBICA-I and Y

Clearance is the amount of clear space required below the user to avoid hitting an obstacle in a fall.

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.
Clearance is the amount of clear space required.

A: Lanyard length

B: Tearing of the energy absorber

C: Average distance between harness attachment point and the worker’s feet = 1.5 m

D : Safety margin required by the standard = 1 m

1. Optimizing clearance

To reduce the clearance it is necessary to limit the tearing of the energy absorber. This tearing depends on the amount of energy to be absorbed, thus the fall distance. In the field, it is advisable to always stay as far below the anchor as possible.

Optimizing clearance
Optimizing clearance

If the situation requires the use of an anchor located below the user, choosing a lanyard that is as short as possible helps limit the potential fall distance. The ABSORBICA VARIO lanyard helps address this type of situation.

Using a short lanyard if the anchor point is below the user.
Using a short lanyard if the anchor point is below the user.

2. Clearance progression depending on the user’s weight

Arresting the fall of a heavier user (with his/her equipment) means more energy that needs to be absorbed, so the absorber tear length is greater, which effects the clearance value.

Slinging an anchor with ABSORBICA-I and Y lanyards 1/3

Example with ABSORBICA-Y 150 MGO lanyard (length with connectors 1.85 m).

Clearance progression depending on the user’s weight
Clearance progression depending on the user’s weight