TABLE 23
MINIMUM
BREAKING
FORCE
OF
WIRE
ROPE
6 x 36 Classification/Bright (Uncoated),
Fiber
Core
Nominal Diameter Approximate Mass
Minimum Breaking Force*
Extra Improved
Plow
IrnprQv~d
Plow Steel**
Steel**
inches
tn..'ll
Ib/ft
tons metric tonnes
tons
metric tonnes
114
6.4
0.11
0.16
2.74 2.49
3.02
2.74
5/16 7.9
0.16 0.24 4.26 3.86
4.69
4.25
3/8
9.5 0.24 0.35
6.10
5.53
6.72
6.10
7/16
1l.1 0.32 0.48 8.27 7.50 9.10
8.26
112
12.7
0.42 0.63 10.7 9.71
11.8
10.7
9/16 l4.3 0.53 0.79 13.5 12.2
14.9 13.5
5/8 15.9
0.66 0.98 16.7
15.1
18.3 16.6
3/4
19.1
0.95 1.41 23.8
21.6 26.2
23.8
7/8
22.2 1.29 1.92 32.2 29.2
35.4
32.1
25.4 1.68
2.50 41.8 37.9
46.0
41.7
1-118
28.6 2.13 3.17 52.6
47.7 57.8
52.4
1-1/4
31.8 2.63 3.91 64.6 58.6
71.1
64.5
1-3/8 34.9 3.18 4.73
77.7
70.5
85.5 77.6
1-1/2 38.1 3.78 5.63 92.0 83.5
101
91.6
1-5/8 41.3 4.44
6.61
107 97.1
118
107
1-3/4 44.5
5.15 7.66 124
112 137
124
1-7/8
47.6 5.91 8.80
141
128
156
142
2
50.8 6.72 10.0 160
145
176
160
2-1/8
54.0 7.59 11.3 179
162 197
179
2-114
57.2 8.51 12.7 200
181
220
200
*
To
convert to Kilonewtons (kN), multiply tons (minimum breaking force) by 8.896;
1 lb
= 4.448 newtons (N).
**
Minimum breaking forces listed above apply to ropes with bright or drawn galvanized wires. Minimum breaking forces are 10%
lower for ropes with
wife~
galvanjzed at finish size.
98 • Wire Rope Technical Board - Wire Rope Users Manual, Fourth Edition
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