FallTech Shock-Absorbing Lanyards (SAL’s) - Manual (Page 7)

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Example Values Actual Values
Free-Fall Distance
(OSHA allows up to 6’)
6’
Deceleration
Distance
(Typically 3.5’ or less)
3.5’
Height of Worker 6’
Safety Factor
(Minimum of 2’)
2’
Total
(Sum of all values)
17.5’
See figure 2.1 below for a graphic illustration of Clear-Fall Distance and
the method for calculating.
Figure 2.1: Clear-Fall Diagram
It is also necessary to consider the fall path when determining the
Clear-Fall limitations in your application. Ensure the fall path is clear of
obstructions, protrusions, equipment or materials that may be a hazard in
the event of a fall. Pay special attention to those items which may
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present an impalement hazard. Obstructions in the fall path may be just
as hazardous as the fall itself, and your PFAS may not be able to protect
you from these hazards. Failure to clear the fall path may result in
serious injury or death. Rig your PFAS with extreme caution, and be
aware of all of the factors that may come into play in the event of a fall.
2.10: Swing-Fall
Swing-Fall is the phenomenon that occurs when the user falls from a
location that is not directly adjacent to, or directly below the anchorage
connector. This is also referred to as the “pendulum effect”, and can
result in a situation where the user is not only falling vertically, but is also
swinging on the horizontal as well. This can bring additional hazards into
play, as you may swing into an obstruction or structural element, causing
serious injuries (see figure 2.2). A significant Swing-Fall may also
require increased Clear-Fall distance, and may also prevent the shock-
absorber from functioning properly. As a rule of thumb, you should
ensure work in an area that does not exceed an angle greater than 15
degrees in any direction from your anchorage.
Figure 2.2: Swing-Fall Diagram