AppendixD
MODULUS
OF
ELASTICITY The
slope
of
the secant to the stress-strain
curve between 10%
of
the rope's mini-
mum
breaking force and 90%
of
the pre-
stretching force.
MOORING LINES Galvanized wire
rope used for holding ships to dock.
NON-PREFORMED Rope
or
strand
that is not preformed.
OPEN SOCKET A wire rope fitting
that consists
of
a basket and two ears
with a pin. See FITTING.
OUTER WIRES Outer layer
of
wires
in a strand.
PEENING Permanent distortion result-
ing from cold plastic metal deformation
of
the outer wires. Usually caused by
pounding against a sheave
or
machine
member,
or
by heavy operating pressure
between rope and sheave. rope and
drum,
or
rope and adjacent wrap
of
rope.
PITCH
See LAY (b).
PREFORMED STRANDS Strand in
which the wires are permanently formed
during fabrication into the helical shape
they will assume in the strand.
PREFORMED
WIRE
ROPE Wire
rope in which the strands are permanent-
ly formed during fabrication into the
helical shape they will assume in the
wire rope.
PRESSED FITTINGS Fittings
attached by means
of
cold forming on
the wire rope.
138 • Wire Rope Technical Board - Wire Rope Users Manual, Fourth Edition
PRESTRESSING
An
incorrect refer-
ence to PRESTRETCHING.
PRESTRETCHING Subjecting a wire
rope
or
strand to tension prior to its
intended application, for an extent and
over a period
of
time sufficient to
remove most
of
the CONSTRUCTION-
ALSTRETCH.
PROPORTIONAL LIMIT As used in
the rope industry, this
tenn
has virtually
the same meaning as ELASTIC LIMIT.
It is the end
of
the load versus elonga-
tion relationship at which an increase in
load no longer produces a proportional
increase in elongation and from which
point recovery to the rope's original
length is unlikely.
RATED CAPACITY The load which a
new wire rope or wire rope sling may
handle under given operating conditions
and at an assumed DESIGN FACTOR.
REEL A flanged spool on which wire
rope
or
strand is wound for storage
or
shipment.
REEVE
To
pass a rope through a hole
or around a system
of
sheaves.
REGULAR
LAY
ROPE See LAY,
TYPES.
REVERSE BEND Reeving a wire rope
over sheaves and drums so that it bends
in opposing directions.
REVERSE
LAY
See LAY, TYPES.
RIGHT LAY See
LAY,
TYPES.
ROLLERS Relatively small-diameter
cylinders,
or
wide-faced sheaves, that
serve as support for ropes.
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