11
4. Wire Rope
4.1
Wire rope speci
fi
cation
Use only wire ropes speci
fi
ed by the manufacturer:
(1)
Classi
fi
cation/Construction
:
5x19, 4x26, or 5x26, with
fi
ber core, or 6x19,
(min. 17 wires/strand), galvanized or black,
lubricated, preformed IPS or XIPS.
(2)
Diameter
:
4.2
Wire rope rigging instructions
WARNING:
Be sure to use a wire rope with the diam-
eter marked on the tirak
™
nameplate.
(1) RIG FROM TOP.
You should have enough wire rope to reach to the
ground or other safe level with about
fi
ve feet (1.5 m)
extra for ensuring safety.
CAUTION:
Always unreel and reel the wire rope in a
straight line
(Fig. 14)
to prevent kinks,
which make it unusable for the hoist.
Figure 13 Checking Wire Rope Diameter “d”
Incorrect
CORRECT
Figure 14 Wire Rope Handling
d
Table 3: Wire rope diameter and min. breaking strength
wire
rope
diameter
1)
min. actual
breaking
strength
for
tirak
™
hoists
with
rated load up to
5/16 in.
8.4 mm
10,000 lbs
44.5 kN
1,500 lbs
680 kg
3/8 in.
9.5 mm
15,000 lbs
66.8 kN
2,200 lbs
1,000 kg
13/32 in.
10.2 mm
18,660 lbs
83.0 kN
1,850 lbs
840 kg
1)
Maximum allowed tolerances
of
NEW
wire rope
diameter
:
5/16 in. (8.4 mm)
=
0.319
to
0.331
in. (8.1 to 8.4 mm)
3/8 in. (9.5 mm)
=
0.362
to
0.374
in. (9.2 to 9.5 mm)
13/32 in. (10.2 mm) =
0.390
to
0.400
in. (9.9 to 10.2 mm)
CAUTION:
Correct wire rope diameter is very im-
portant for the tirak
™
function!
An oversized wire rope may cause a wire
rope jam inside the hoist and/or the BSO
or BS/BSO secondary brake to malfunc-
tion.
N O T E :
How to measure wire rope diameter
:
The correct diameter of the wire rope is the
largest cross-sectional measurement across
the strands (and not the valleys).
The measurement should be made carefully
with calipers as shown in Fig. 13.
