7 Wire
19
Warrington
Figure 5. Four Basic Strand Patterns
31
Warrington Seale
46
Seale
Filler Wire
Figure 6. Combination Strand Patterns
19
Seale
43 FillerWire Seale
25 Filler Wire <
49 Seale
Warrington Seale
The
nomenclature used to identify a wire rope indicates: 1) the number
of
strands in the rope, 2) the number (nominal or exact)
of
wires in each strand, and
3) a descriptive word or letter indicating the type
of
construction, i.e., the geo-
metric arrangement
of
wires.
Figure 5 shows cross sections
of
four basic strand constructions; Figure 6
shows several possible combinations
of
these constructions.
At this point, it would be useful to discuss wire rope nomenclature in detail
because the subject may generate some misunderstanding. The reason for this
stems from the practice
of
referring to rope either by classification
or
by its spe-
cific construction.
Rope classifications indicate the number
of
strands as well
as
the number
of
wires in each strand, e.g., 6 x
7,
6 x
19,6
x 36, 8 x 19, 19 x 7, 35 x 7 etc.
However, these are nominal classifications that
mayor
may not reflect the actual
construction. For example, the
6 x 19 classification includes constructions such
as 6 x
21
Filler Wire, 6 x 25 Filler Wire, and 6 x 26 Warrington Seale. Despite
the fact that none
of
the three constructions named have 19 wires, they are in the
6 x
19
classification.
As an example, a supplier receiving an order for 6 x 19 rope may assume this
to refer to the classification, and could furnish any construction within this clas-
sification. But,
if
the
job
requires the special characteristics
of
a 6 x 26
Warrington
Seale, and a 6 x 25 Filler Wire is supplied, shorter service life may result.
To avoid such misunderstandings, the safest procedure is to order a specific
construction. In the event that the specific construction is not known
or
is in
doubt, the rope should
be
ordered by classification along with a description
of
its
end
use.
12'
Wire Rope Technical Board - Wire Rope Users Manual, Fourth Edition
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