T M 5 - 3 8 1 0 - 3 0 5 - 1
Illustrated below are a few combinations of basic design constructions (Figure 4- 19). Wire rope is iden-
tified by reference to its number of strands, as well as the number and geometric arrangement of wires in
the strand (Figure 4-20).
6x7 6x9 WARRINGTON 6X19 SEALE
6X25 FW
Figure 4-19. Basic Constructions
Figure 4-20. A Single Wire Rope Strand
Table 1. Wire Rope Classification
Based on the normal number of wires in each strand
Classification
6x7
6x19
6x37
6X61
6x91
6x127
8x19
19x7
and
18x7
Description
Containing 6 strands that are made up of 3 through 14 wires, of
which no more than 9 are outside wires.
Containing 6 strands that are made up of 15 through 26 wires, of
which no more than 12 are outside wires.
Containing 6 strands that are made up of 27 through 49 wires, of
which no more than 18 are outside wires.
Containing 6 strands that are made up of 50 through 74 wires, of
which no more than 24 are outside wires.
Containing 6 strands that are made up of 75 through 109 wires, of
which no more than 30 are outside wires.
Containing 6 strands that are made up of 110 or more wires, of
which no more than 36 are outside wires.
Containing 8 strands that are made up of 15 through 26 wires, of
which no more than 12 are outside wires.
Containing 19 strands, each strand is made up of 7 wires. It is
manufactured by covering an inner rope of 7x7 left Iang lay
construction with 12 strands in right regular lay. (The rotation-
resistant property that characterizes this highly specialized
construction is a result of the counter torques developed by the
two layers.) When the steel wire core strand is replaced by a
fiber core, the description becomes 18x7.
When a center wire is replaced by a strand, it is considered as a single wire, and the rope classification
remains unchanged. There are, of course, many other types of wire rope, but they are useful only in a
limited number of applications and, as such, are sold as specialties. They are usually designated accord-
ing to their actual construction.
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