Fall Zone

sturzraum

The necessary fall zone has to be taken into consideration while working with fall protection equipment, regardless of the situation.

Goal:
Impact during an accidental fall must be prevented!

The required fall zone can have a radius between .5 and 10 meters, depending on the system components and placement of the anchors.

The important factors are:

  1. Placement of the anchors (directly above the worker, and above head height wherever possible)
  2. Total length of the ropes
  3. Dynamic stretching of the ropes.
    For example: the dynamic pull of a EN1891 rope is 5%!
    A wet rope can stretch up to 1.5x more than a dry rope!
  4. Extension of shock absorbers
    = the effective, fall dependent, extension length
    → A lower fall height will only extend the absorber a fraction of the distance
    →A specialist should be able to calculate the correct extension length
  5. Stretching of the harness
  6. Distance between the attachment point on the harness and the workers shoes
  7. A safety reserve of 1m

Here are a few example calculations for a safe fall zone:

Example 1: Height safety device with an overhead anchor point

Example 2: 2m rope with an anchor point below the waist

Example 3: 1.5m rope with an anchor point at shoulder height