Wire
Ropes
Wire
Rope Construction
Essentially,
it is made of a number of strands laid helically about a metallic or
non-metallic core. Each strand composed of a number of wires also
laid helically . Various types of wire rope have been
developed to meet a wide range of uses and operating conditions.
These types classified by the kind of core; number of strands; the
number, sizes and wire arrangement in each strand.
Wire
Rope Materials
Materials
used in the manufacture of wire ropes are, in the order of
increasing strength: iron, phosphor bronze, traction steel, plow
steel, improved plow steel and bridge rope steel. Iron wire
rope is largely used low strength applications such as elevator
ropes not used for hoisting and for stationary guy ropes.
Phosphor
bronze wire rope is used occasionally for elevator
governor-cable rope and marine applications as life lines, clearing
lines, wheel ropes and rigging.
Traction
steel wire rope is primarily used as hoist rope for
passenger and freight elevators of the traction drive type, an
application for which it was specifically designed.
Galvanized
wire or coated with zinc by the electrode position process are
used in certain applications where additional protection against
rusting is required.
Galvanized
carbon steel, tinned carbon steel and stainless steel are used
for small cords and strands ranging in diameter from 1/64” to 3/8”
and larger.
