A single wire rope strand. Wire rope is identified by reference to its number of strands, as
well as the number and geometric arrangement of wires in the strand.
Table 1 WIRE ROPE CLASSIFICATIONS
Based on the Nominal Number of Wires in Each Strand
Classification Description
6x7
Containing 6 strands that are made up of 3 through 14
wires, of which no more than 9 are outside wires.
6x19
Containing 6 strands that are made up of 15 through
26 wires, of which no more than 12 are outside wires.
6x37
Containing 6 strands that are made up of 27 through
49 wires, of which no more than 18 are outside wires.
6x61
Containing 6 strands that are made up of 50 through
74 wires, of which no more than 24 are outside wires.
6x127
Containing 6 strands that are made up of 75 through
109 wires, of which no more than 36 are outside wires.
8x19
Containing 8 strands that are made up of 15 through
26 wires, of which no more than 12 are outside wires.
19x7 and 18x7
Containing 19 strands, each strand is made up of 7
wires. It is manufactured by covering an inner rope of
7x7 left lang 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 replaces by
a fiber core, the description becomes 18x7.
When a center wire is replaces by a strand, it is considered as a single wire, and the rope
classification remains unchanged.
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