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Attach end (4) of the fall arrester (absorber side) to the back D link of the fall arrest harness as per standard EN361.
Any other configuration is tolerated only for vertical use.
Allow for the fall factors:
Depending on the position of the anchorage points, a distinction is made between 3 fall factors:
At fall factor 0, the anchorage point is above the user.
At fall factor 1, the anchorage point is level with the shoulders of the user. (Height of fall < 1 x working height)
At a fall factor 2, the anchorage point is at the feet of the user (Height of fall < 2 x working height)
Work carried out with a fall factor of 2 is particularly dangerous and should be avoided, if possible choosing an
anchorage point located higher up (see figure 2).
Fall factor 0
With an Automatic Retracting Fall Arrester, , It is essential to allow a clearance of 5.75 m (minimum working
height) under the user for work with a fall factor of 2.
Pour ces Antichutes à Rappel Automatique, this height can be reduced to 4.75m.
As a general rule, the minimum working height for a fall factor of 2 is calculated as follows (see figure 3):
Webbing length mutiplied by 2 (= fall travel)
+ 1.75m opening of energy absorber (= braking travel)
+ 1 m safety distance
The anchorage point must always be above the user (=fall factor of between 0 and 1).
3
4
Figure 2: comparison of fall factors before and after a fall .
Before
fall
After fall
Figure 3: minimum working height
Fall factor 1
Fall factor 2
Anchorage point
Lanyard ength
x2 +1.75m
decelaration
Maximum
distance
potential fall
+1m
distance
safety margin
Fall factor 2
5
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