AppendixD
CLOSING
LINE
Wire
rope
that per-
forms two functions:
1)
closes a
clamshell
or
orange peel bucket, and 2)
operates as a hoisting rope.
COIL
Circular bundle
or
package
of
wire rope that is not affixed to a reel.
CONSTRUCTION
Geometric design
description
of
the wire
rope's
cross sec-
tion. This includes the
number
of
STRANDS,
the number
of
WIRES
per
strand and the pattern of wire arrange-
ment
in each STRAND.
CONSTRUCTIONAL
STRETCH
The
stretch that occurs when the rope is
initially
loaded-it
is due
to
the helically
laid wires and strands creating a con-
stricting action that compresses the core
and generally brings all
of
the rope's ele-
ments into close contact.
CONTINUOUS
BEND
Reeving
of
wire rope
over
sheaves
and
drums so
that it bends in
one
direction, as opposed
to
REVERSE
BEND.
CONVEYOR
ROPE
Endless wire
rope used to carry material.
CORD
Term applied to small diameter
specialty wire rope
or
strand.
CORE
The
axial
member
of
a wire
rope around which the strands are laid.
CORING
LINE
Wire
rope
used to
operate the coring tool that is used to
take core samples during oil well
drilling.
CORROSION
Chemical decomposi-
tion
of
the wires in a rope through the
action
of
moisture, acids, alkalines
or
other destructive agents.
134·
Wire Rope Technical Board - Wire Rope Users Manual, Fourth Edition
CORROSION
RESISTING
STEEL
Chrome-nickel steel alloys designed for
increased resistance to corrosion.
CORRUGATED
Term used to describe
the grooves
of
a SHEAVE
or
DRUM
after they have been worn down to a
point where they show an impression
of
a wire rbpe.
CREEP
The
unique movement
of
a
wire rope with respect to a drum surface
or
sheave surface resulting from the
asymmetrical
load
between one side
of
the sheave (drum) and the other.
It
should be distinguished from slip which
is yet another type
of
relative movement
between rope and the sheave
or
drum
surface.
CROSS
LAY See LAY, TYPES.
CROWD
ROPE
A wire rope used to
drive or force a shovel bucket into the
material that is to be handled.
DEAD
LINE
In drilling, it is the end
of
the rotary drilling line fastened to the
anchor or dead-line clamp.
DECELERATION
STRESS
The
addi-
tional stress that
is
imposed on a wire
rope as a result
of
a decrease in the load
velocity.
DEFLECTION
a)
The
sag
of
a rope in
a span. Usually measured at mid-span as
the depth from the chord joining the tops
ofthe
two supports. b) Any deviation
from a rope operating in a straight line.
DESIGN
FACTOR
In
a wire rope, it
is
the ratio
of
the minimum breaking force
to the total working load.
DIAMETER
As related to wire rope it
is the diameter
of
a circle which circum-
scribes the wire rope.
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