Wire rope is stronger, lasts longer, and is much
more resistant to abrasion than fiber line. Because of
these factors, wire rope is used for hoisting tasks that
are too heavy for fiber line to handle. Also, many of
the movable components on hoisting devices and
attachments are moved by wire rope.
Wire rope is an intricate device made up of a
number of precise moving parts. The moving parts of
wire rope are designed and manufactured to maintain
a definite relationship with one another. This
relationship ensures that the wire rope has the
flexibility and strength crucial to professional and safe
This chapter discusses the construction, the
characteristics and specifications, and the criteria used
for the selection of wire rope. The related attachments
and the proper handling procedures for wire rope are
NOTE: In the Navy, you may hear wire rope
referred to as wire or rope but never as line.
WIRE ROPE CONSTRUCTION
Wire rope is composed of three parts: wires,
strands, and core (fig. 5-1). A predetermined number
of wires of the same or different size are fabricated in
a uniform arrangement of definite lay to form a strand.
The required number of strands is then laid together
symmetrically around the core to form the wire rope.
The basic component of the wire rope is the wire.
The wire may be made of steel, iron, or other metal in
various sizes. The number of wires to a strand varies,
Figure 5-1.Fabrication of wire rope