Petzl Веревки Petzl - Manual (Page 5)

5 R74 SEMI-STATIC ROPE R745000C (190209)
6
Precautions for use
6D. Taut rope
WARNING, a taut rope anchored with a rope clamp can be
damaged in case of overloading.
WARNING, a load applied to the center of the rope can strain
the anchors and the rope beyond their strength capacity (see
drawing).
6E. Protect your rope
WARNING, chemical agents (vapors, acids, oils, gasoline, etc.)
can destroy the rope’s fi bers. Protect your rope. Paint or cement
can affect the performance and strength of the rope.
7
Semi-static rope performance
Explanation of standard tests:
Fall factor f
Ratio between the length of a fall and
the length of rope that arrests the fall.
Shock load F
Shock force on the person during a
fall and transmitted to the fall-arrest
system (anchor, carabiner, rope, etc.).
The dynamic performance values
given were obtained from a fall of
factor 0.3 with a mass of 100 kg
(type A rope). These values must be
less than 6 kN in accordance with the
EN 1891 standard.
Number of falls
Determined by a device that produces
a fall of factor 1 every three minutes
(rope terminated with fi gure 8 knots).
The rope must resist fi ve successive
falls with a mass of 100 kg (type A
rope).
Static breaking strength
Breaking strength when the rope is
subjected to a slow pull. Type A ropes
must resist a force of at least 22 kN.
Static resistance of the termination.
A fi gure 8 knot or sewn termination
in a type A rope must resist a load of
15 kN for three minutes.
8 knot
8 knot
3 3 mm
0,9 m
1 m
1 m
factor 0,3
0,9 m
3 m
factor = =
0,9 0,9
3 3
0,3
100kg
f = = 1
x 5
1 m
Number of falls:
1 m
8 knot
8 knot
0,6 m
2 m
100kg
F < 6 kN
f = = 0,3
2 m
0,6 m
3 m
factor 1
3 m
3 m
factor = =
3 3
1
3 m
Number of falls Shock load F