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Idiomas disponibles
Idiomas disponibles
Us er Ins tru ct ion s - Engl is h
5.1.1 Dorsal Attachment Element - Back
D-Ring/Web Loop
The dorsal attachment element or back D-ring/web loop shall be
used as the primary fall arrest attachment, unless the applica-
tion allows for the use of an alternate attachment. The dorsal
attachment may also be used for travel restraint or rescue.
When supported by the dorsal attachment during a fall, the
design of the full-body harness shall direct load through the
shoulder straps, supporting the user, and through the thighs.
Supporting the user, post fall, by the dorsal attachment will result
in an upright body position with a slight lean to the front with
some slight pressure to the lower chest. Considerations should
be made when choosing a sliding versus fixed dorsal attach-
ment element. Sliding dorsal attachments are generally easier
to adjust to different user sizes, and a allow a more vertical rest
position post fall, but can increase full-body harness stretch.
CAUTION: Due to the nature of soft loop conections, it is
recommended that only soft loops and carabiners be used
to connect to soft loop attachments. Connecting snap
hooks to soft loops is not a preferred connection. However,
if a snap hook is used to connect to a soft loop, the snap
hook must be ANSI compliant with a gate strength of at
least 3,600 lbs. (16 kN). (Current CSA standards do not al-
low the use of snap hooks with soft loops.)
5.1.2 Sternal Attachment Element -
Chest Area Front D-Ring
The sternal attachment may be used as an alternative fall
arrest attachment in applications where the dorsal attachment
is determined to be inappropriate by a competent person and
where there is no chance to fall in a direction other than feet
first. Free fall shall be limited to 2 ft. (0.6m). Accepted practical
uses for a sternal attachment include, but are not limited to,
ladder climbing with a guided type fall arrester, ladder climbing
with an overhead self-retracting lifeline for fall arrest, work
positioning, and rope access. The sternal attachment may also
be used for travel restraint or rescue.
When supported by the sternal attachment during a fall, the
design of the full-body harness shall direct load through the
shoulder straps, supporting the user, and around the thighs.
Support the user, post fall, by the sternal attachment will
result in roughly a sitting or cradles body position with weight
concentrated on the thighs, buttocks and lower back. Supporting
the user during work positioning by this sternal attachment will
result in an approximate upright body position.
If the sternal attachment is used for fall arrest, the competent
person evaluating the application should take measures to en-
sure that a fall can only occur feet first. This may include limiting
the allowable free fall distance. It may be possible for a sternal
attachment incorporated into an adjustable style chest strap to
cause the chest strap to slide up and possibly choke theuser
during a fall, extraction, suspension, etc. The competent person
should consider full-body harness models with a fixed sternal
attachment for these applications.
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