TABLEtS
APPROXIMATE METALLIC AREAS
OF
ONE-INCH ROPE
OF
VARIOUS CONSTRUCTIONS*
Fiber
IWRC
Cable
or
Construction Core WSC
Laid
5x7
.390 .457
6x6
.320 .386
6x7
.384
.451
6 x
12
.232
6x
191217
.376 .442
* Values given are based on 3%
6x
19S
.404 .470
oversize because this is a com-
6x
19W
.416 .482
mon design "target." But, this
6x21
FW
.412
.478
figure often varies and is not to
6x21
S
.411
.477
be considered a standard. Wire
6 X 2415/9
.329
sizes in specific constructions
6x25FW
.417
.483
also vary, thus the given values
6x26WS
.409
.476
are approximate. They are, how-
6x29FW
.420 .486
ever, within the range
of
accura-
6 X 3112/19
.385
.452
cy
of
the entire method that is, in
6x31
WS
.414
.481
itself, approximate.
For
con-
6x33FW
.423
.490
structions, consult the rope man-
ufacturer.
6x36WS
.419
.485
6x3718119W
.393
.459
As indicated, it is necessary to
6x37FW
.427
.493
know the rope area
in
order to
6x41
SFW
.425
.491
solve the previously given
6x41
WS
.424
.490
stretch equation.
6 X 42 Tiller
.231
For
diameters other than 1 inch,
6x43
FWS
.392
.458
multiply the area given in this
6
x46
SFW
.425
.492
table by the square
of
the nomi-
6x46WS
.426 .492
nal rope diameter.
6x61
FWS
.408
.474
Example: To find the area
of
1/2" 6 x 36 WS IWRC
7x7
.471
From the table: .485
7 X
19
1217
.466
Diameter squared:
(112)2=114
or
7x
19W
.505
.5
x
.5
=.25
8x7
.343
.474
Multiply table value by diameter
8 X
19
S
.359 .472
squared:
8x
19W
.366
.497
Area =.25 x .485=.121 inches
2
8x25FW
.368
.499
Example: To find the area
of
8x
19FW
.366 .499
1-1/4" 6 x 25
FW
FC
18
X 7
.422
Answer: (1.25)2 x
.417::::1.563
x
19
X 7
.453
.417=.652 inches
2
6 X 3 X
19
.122
7x7x7
.343
7 X 7 X
19
.361
Wire Rope Technical Board - Wire Rope Users Manual, Fourth
Edition·
91
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