12
4.2
Wire rope rigging instructions
(continued)
(2) If the wire rope is not equipped with a swaged
fi
tting
as shown in Fig. 15, proceed as follows:
– Install heavy duty thimble with a minimum of three
(3) J-Type (Fist Grip) Clamps (Fig. 16).
– Apply
fi
rst clamp approximately 7“ (18 cm) from thim-
ble. Tighten nuts moderately.
– Attach second clamp as close to thimble as possible.
Leave nuts loose.
– Attach the third clamp half-way between
fi
rst and
second clamp, leaving the nuts loose. Take up wire
rope slack.
– Tighten nuts evenly on all clamps (approx. 30 ft-lbs.
torque) as speci
fi
ed by the clamp manufacturer.
WARNINGS
:
a) Retighten after the wire rope is
loaded for the
fi
rst time
b) Inspect fastening periodically.
In use, wire ropes will stretch and reduce in
diameter.
Retighten all “Fist Grip” nuts periodically.
(3) Anchor the wire rope end to a rigging device, which
complies with all relevant safety requirements.
Be sure to use compatible connecting devices, e.
g. a 1/2 in. anchor shackle or similar with adequate
strength and safety factor. Secure it.
(4) Insure that the anchor points of the wire rope are
directly above the position of the hoists (Fig. 17).
max.
1
1
/
2
dia.
dia.
4 in. (10 cm) Straight
Figure 18 Wire Rope Tip
Figure 17 Suspension Distance
Figure 16
Wire Rope Termination
by Fist Grip Clamps
Figure 15
Wire Rope Termination
by Swaged Fitting
Fist Grip Clamp
Heavy duty
thimble
Heavy duty thimble
Ferrule
(Sleeve)
a) Prepare ends by
brazing or welding
–
make
sure all end wires are captured
.
b) Grind end to approximately 1/4“ diameter.
DO NOT
grind end
fl
at or to a cone shape.
End
must be rounded
(Fig. 18).
c) The last 4 in. (10 cm) of wire rope must be
straight for proper reeving.
WARNING
:
Improper spacing is dangerous
and could cause failure
of the support system.
(5) Check that wire rope tip is welded round
(Fig. 18). IF NOT:
Same distance
X
Platform
Support
system
Hoist
X
