Specification
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ENGLISH
braided, or other types of rope constructions must not be used.
When selecting the lifeline, choose a rope with a rm lay. Inspect
the lay of the rope by grasping it several feet from the end
between the thumb and index nger. You should not be able to
easily squeeze or atten the rope. Untwisting should be difficult
and the rope should spring back to its original shape.
3. MATERIAL: Werner Co. recommends selecting lifeline ropes
made from polyester bers. Polyester has less stretch and less
swelling due to moisture absorption than nylon. Ropes made
solely of polypropylene, polyethylenes, or other olens must not
be used. Ropes made from cotton, sisal, hemp, abaca (manila),
or other plant/animal bers must not be used. ANSI Z359.1
requires rope used in vertical lifelines to be made of virgin
synthetic materials having strength, aging resistance, abrasion
resistance, and heat resistance characteristics equivalent or
superior to polyamides.
4. STRENGTH: Select a lifeline which, when terminated and
installed, will retain a minimum strength of 5,000 lbs. (22kN)
per ANSI Z359.1. Selection must account for strength reduction
factors, such as sharp edges and degrading factors (i.e.
chemicals).
Note: Per ANSI Z359.1; Knots shall not be used for load bearing
end terminations, but may be an acceptable means of securing
the free end of the lifeline at ground level.
d. Lanyard
For fall arrest systems Werner Co. recommends using energy
absorbing lanyards incorporating self locking snap hooks. Lanyards
labeled ANSI A10.14 Type II must not be used for fall arrest
applications. All lanyards must have a minimum breaking strength
of 5,000 lbs.
e. Body Support
The recommended body support for fall arrest applications is a full
body harness. For restraint applications a body belt may be used.
IMPORTANT: Only lifeline ropes which meet the size, construction,
and material properties required for compatible use with this rope
grab may be used.