Manitowoc CD15 Operator's Manual page 103

CD15 OPERATOR MANUAL
6. After final pin connections are made, increase the loads
gradually until the wedge is properly seated.
7. The wire rope and wedge must be properly secured
inside the socket before placing the crane into lifting
service. It is the wedge that secures the wire rope inside
the socket. The dead-end treatment is used to restrain
the wedge from becoming dislodged from the socket
should the rope suddenly become unloaded due to the
hook block or the downhaul weight striking the ground,
etc.
Sketches A through F (Figure 5-9) illustrate various ANSI
approved methods for treating the dead-ends of wire ropes
which exit a wedge socket assembly. While use of the loop-
back method is acceptable, care must be exercised to avoid
the loop becoming entangled with tree branches and other
components during crane transport and with the anti-two
block system and other components during use of the crane.
Of the methods shown below, Manitowoc prefers that
method A or F be used, i.e., clipping a short piece of wire
rope to the dead-end or using a commercially available
specialty clip or wedge. Typically, it is recommended that the
tail length of the dead-end should be a minimum of 6 rope
diameters but not less that 6 in (15.2 cm) for standard 6 to 8
strand ropes and 20 rope diameters but not less than 6 in
(15.2 cm) for rotation resistant wire ropes.
When using method A, place a wire rope clip around the
dead end by clamping a short extra piece of rope to the rope
dead end. DO NOT CLAMP THE LIVE END. The U-bolt
should bear against the dead end. The saddle of the clip
should bear against the short extra piece. Torque the U-bolts
according to the table titled Wire Rope Clip Torque Values
(Table 5-1).
Other sources for information with which crane users should
be familiar and follow is provided by the American Society of
Specialty Clip
Mechanical Engineers, American National Standard, ASME
B30.5, latest revised. ASME (formerly ANSI) B30.5 applies
to cableways, cranes, derricks, hoists, hooks, jacks, and
s ling s. I t stat es , in s ec tio n 5 -1 .7 .3, " (c) Swag ge d,
compressed, or wedge socket fittings shall be applied as
recommended by the rope, crane or fitting manufacture."
Wire ropes are addressed in ASME B30.5, section 5-1.7.2,
ROPES, it states, in pertinent part, "(a) The ropes shall be of
a c onst ruction rec ommende d by the ro pe or crane
manufacturer, or person qualified for that service." Additional
information is published by the Wire Rope Technical Board in
the Wire Rope Users Manual, latest revised edition.
Table 5-1
Wedge Socket
Published 3-30-2018, CTRL 636-05
Wire Rope Clip Torque Values
Clip Sizes
Inches mm lb-ft
1/8 3.18 4.5
3/16 4.76 7.5
1/4 6.35 15
5/16 7.94 30
3/8 13.28 45
7/16 11.11 65
1/2 12.70 65
9/16 14.29 95
5/8 15.88 95
3/4 19.05 130
7/8 22.23 225
1 25.40 225
1-1/8 28.58 225
1-1/4 31.75 360
1-3/8 38.68 360
1-1/2 38.10 360
Specialty Wedge
ATTACHMENTS
Torque
Nm
6
10
20
40
60
90
90
130
130
175
300
300
300
490
5
490
490
FIGURE 5-9
5-11