FallTech Contractor Series SRL’s - Manual (Page 5)

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2.5: Fall Arrest
Fall Arrest is an area of Fall Protection which focuses on stopping a
fall once it has occurred. Personal Fall Arrest Systems typically consist
of an anchorage, a full body harness and a self-retracting lifeline, shock-
absorbing lanyard or other deceleration device designed to bring a falling
user to a stop in the shortest possible distance while limiting the force
imparted to the user’s body.
2.6: Fall Restraint
Fall Restraint is an area of Fall Protection devoted to restraining the
user of the system in a manner which restricts his or her access to the
fall hazard in a manner such that they cannot be subjected to a fall. A
typical Fall Restraint System consists of an anchorage, a full body
harness or a restraint belt and a restraint lanyard. An SRL should never
be utilized in a restraint application as it is not capable of restricting a
user’s access to fall hazards.
2.7: Work Positioning
Work Positioning is an area of Fall Protection devoted to allowing a
user to work on a vertical surface by means of a positioning assembly,
and restricting the user’s exposure to a fall of no more than two feet.
Typical positioning assemblies consist of a large rebar hook and a length
of chain, rope, wire rope or webbing with a double locking snap hook on
either end. These snap hooks are attached to d-rings on the hips or on
the waist of the user’s full body harness, with the rebar hook attached to
the structure upon which the user is working. An SRL should never be
used for work positioning, nor should it ever be attached to a side or hip
d-ring on a full body harness.
2.8: Free-Fall
Free-Fall is the distance that a worker will fall before the connecting
device or deceleration device elements of the PFAS will begin to engage
during a fall event. OSHA allows a maximum Free-Fall Distance of 6’ (6
feet) when rigging a Personal Fall Arrest System (PFAS). In some
cases, exceptions may be allowed when there is no practical way to limit
the Free-Fall Distance to 6’, such as a job-site where no overhead
anchor-point is available. Tying off in a manner that would create a
Free-Fall greater than 6’ should always be a last resort. If you are
rigging a system that allows more than 6’ of Free-Fall, make sure your
Connecting Device/Deceleration Device is rated for this application.
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FallTech Contractor Series SRL’s ARE NOT rated for Free-Falls
greater than 2’!
2.9: Clear-Fall
Clear-Fall or Clear-Fall Distance is the distance that is required to
safely arrest the fall of a user. When working at heights and using a
PFAS, it is important to consider the distance between the
walking/working level and the next lower level to ensure that the
components selected are capable of arresting the user’s fall before they
hit the next lower level. The required Clear-Fall Distance can easily be
calculated by adding together the Free-Fall Distance, the Deceleration
Distance, the height of the user plus a safety factor of 2 feet. The
formula for calculating Clear-Fall Distance is shown below:
Free-Fall Distance + Deceleration Distance + Height of Worker + Safety Factor = Clear-Fall
Distance
The matrix below can be used as a guide for calculating Clear-Fall
Distance on your job-site:
Example Values Actual Values
Free-Fall Distance
(OSHA allows up to 6’)
2’
Deceleration
Distance
(Typically 3.5’ or less)
3.5’
Height of Worker 6’
Safety Factor
(Minimum of 2’)
2’
Total
(Sum of all values)
13.5’
See figure 2.1 on the next page for a graphic illustration of Clear-Fall
Distance and the method for calculating. 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 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.