The 6 x 19 classification of wire ropes includes standard 6 strand, round strand ropes with 16 through 26 wires per strand. The 6 x 36 classification of wire ropes includes standard 6 strand, round strand ropes with 27 through 49 wires per strand. Although their operating characteristics vary, all have the same weight per foot and the same minimum breaking force, size for size.
While the 6 x 19 ropes give primary emphasis to abrasion resistance in varying degrees, the 6 x 36 ropes are important for their fatigue resistance. This fatigue resistance is made possible by the greater number of small wires per strand.
Although there are exceptions for special applications, the constructions in 6 x 36 classification are primarily designed to be the most efficient for each rope diameter. As the rope size increases, for instance, a large number of wires can be used to achieve required fatigue resistance, and still those wires will be large enough to offer adequate resistance to abrasion.
|
FIBER CORE |
IWRC |
Diameter
(in.) |
Approx.
wt./ft.
(lbs.) |
Minimum Breaking Force
(tons of 2000 lbs.)
IPS XIP® |
Approx.
wt./ft.
(lbs.) |
Minimum Breaking Force
(tons of 2000 lbs.)
IPS XIP® XXIP® |
3/16 |
0.059 |
1.55 |
1.71 |
-- |
-- |
-- |
-- |
1/4 |
0.105 |
2.74 |
3.02 |
0.116 |
2.94 |
3.40 |
-- |
5/16 |
0.164 |
4.26 |
4.69 |
0.18 |
4.58 |
5.27 |
-- |
3/8 |
.0236 |
6.10 |
6.72 |
0.26 |
6.56 |
7.55 |
8.30 |
7/16 |
0.32 |
8.27 |
9.10 |
0.35 |
8.89 |
10.2 |
11.2 |
1/2 |
0.42 |
10.7 |
11.8 |
0.46 |
11.5 |
13.3 |
14.6 |
9/16 |
0.53 |
13.5 |
14.9 |
0.59 |
14.5 |
16.8 |
18.5 |
5/8 |
0.66 |
16.7 |
18.3 |
0.72 |
17.9 |
20.6 |
22.7 |
3/4 |
.095 |
23.8 |
26.2 |
1.04 |
25.6 |
29.4 |
32.4 |
7/8 |
1.29 |
32.2 |
35.4 |
1.42 |
34.6 |
39.8 |
43.8 |
1 |
1.68 |
41.8 |
46.0 |
1.85 |
44.9 |
51.7 |
56.9 |
1 1/8 |
2.13 |
52.6 |
57.8 |
2.34 |
56.5 |
65.0 |
71.5 |
1 1/4 |
2.63 |
64.6 |
71.1 |
2.89 |
69.4 |
79.9 |
87.9 |
1 3/8 |
3.18 |
77.7 |
85.5 |
3.50 |
83.5 |
96.0 |
106 |
1 1/2 |
3.78 |
92.0 |
101 |
4.16 |
98.9 |
114 |
125 |
1 5/8 |
4.44 |
107 |
118 |
4.88 |
115 |
132 |
146 |
1 3/4 |
5.15 |
124 |
137 |
5.67 |
133 |
153 |
169 |
1 7/8 |
5.91 |
141 |
156 |
6.50 |
152 |
174 |
192 |
2 |
6.72 |
160 |
176 |
7.39 |
172 |
198 |
217 |
2 1/8 |
7.59 |
179 |
197 |
8.35 |
192 |
221 |
244 |
2 1/4 |
8.51 |
200 |
220 |
9.36 |
215 |
247 |
272 |
2 3/8 |
|
10.4 |
239 |
274 |
|
2 1/2 |
11.6 |
262 |
302 |
2 5/8 |
12.8 |
288 |
331 |
2 3/4 |
14.0 |
314 |
361 |
2 7/8 |
15.3 |
341 |
392 |
3 |
16.6 |
370 |
425 |
3 1/8 |
18.0 |
399 |
458 |
3 1/4 |
19.5 |
429 |
492 |
3 3/8 |
21.0 |
459 |
529 |
3 1/2 |
22.7 |
491 |
564 |
3 5/8 |
24.3 |
523 |
602 |
3 3/4 |
26.0 |
557 |
641 |
3 7/8 |
27.7 |
591 |
680 |
4 |
29.6 |
627 |
720 |
4 1/8 |
31.7 |
658 |
757 |
4 1/4 |
33.3 |
694 |
799 |
4 3/8 |
35.4 |
734 |
844 |
