30
Fig. 55
c) Wire ropes
Attention!
Replace wire ropes, if one of the following
defects is determined during the prescribed
weekly check:
– 8 or more wire breaks (fig. 54) on a length
which corresponds to 30 times the rope
diameter.
“Pig-tail” curl
in wire rope
Kinked wire rope
Damage
caused by improper use,
(e.g. by fixing a load with the rope)
Crushed wire rope
Birdcaged wire rope
Loop formation
on wire rope
Fig. 56
Wire rope
diameter
broken wires
Fig. 54
8.2
Checks
8.2.1 Essential checks
a)
General
Prior to every operation
and
during operation make sure, that
– the TIRAK
®
hoist,
– and all other used equipment (anchoring de-
vices, pulleys etc.)
are properly installed
and
without visible damage
Attention!
If during operation damage appears:
– STOP operating,
– if necessary: cordon off the danger zone,
and
– have the damage removed by a qualified
person!
b)
Nameplates and labels
Make sure that all nameplates and labels are in place
and not obscured (see section 9.5, pages 32 to 33).
Replace missing labels and those which are not leg-
ible!
– Heavy rust formation on the surface or in-
side.
– Heat damage, recognisable through discol-
oured wires.
– Reduction of the diameter by 5% or more
compared with the nominal diameter (fig. 56).
– External damage to the rope – fig. 55
shows the most frequent forms of damage.
These examples do not however replace the
ISO 4309 reference for wire rope checks!
d)
Electric cables
Replace lead and control cables if damage to
the insulation or to cable connections is
determined during the prescribed weekly
check.
