Page 222 - Bài 1 ok_Neat

more dangerous and may rapidly lead to grave consequences. The harmful
influence of earth or sand is not negligible: minute grains of sand which penetrate
the webbing are tiny abrasion points where the fibers are cut when they are under
tension. It can lead to breakage of the tape at a value much less than normal.
• To limit this problem, a soiled harness should be washed, by hand or in a machine,
with a powder for delicate textiles then rinsed in clean water (maximum temperature
0
30 C), and finally dried in a shaded cool ventilated place. Damp webbing, due to
use in the wet or washing, shrinks slightly.

• It is thus more than advisable to inspect your harness regularly to check the
condition of the webbing and stitching, as well as the proper functioning of the
buckles. It is considered that a harness has a
lifetime of the order of five years by "natural
ageing."
Petzl-Rescue Harness Technical Information,
www.petzl.com

Chest Harness- A chest harness is worn in
conjunction with a seat harness, and helps to a

distribute shock force to the wearer in the event of
a fall (Figure 60). Depending upon the application,
use of a chest may be optional based upon on the Figure 59- Petzl Voltige Chest Harness.
likelihood of an inverted fall. © Petzl.

• A connector strap, which creates a sliding link
between the seat and chest harness, maintains
an upright position of rescuer even if they lose
consciousness (Figure 61). This connector strap
should be incorporated when the main line and
belay line are joined together somewhere above
the rescuer (e.g. rescue litter master attachment
point). Although a tied piece of webbing is
frequently utilized in this application, it is
recommended that such a strap be a

commercially sewn rated sling for added security.
It is important that the connection between the
seat harness and chess is snug to make certain Figure 60- Connector Strap (Blue)
that weight is transferred to the seat harness. Provides Link between Seat and
Chest Harness.

71 | Pa g e