TABLE
29
MINIMUM BREAKING FORCE
OF
WIRE ROPE
8 x 19 ClassificationlBright (Uncoated), Fiber Core
Nominal Diameter
Approximate
Mass
Minimum Breaking Force*
Improved
Plow Stee1**
inches
mm
lb/ft kg/m
tons metric tonnes
114
6.4 0.10 0.15 2.35
2.13
5/16 7.9
0.15
0.22
3.65 3.31
3/8
9.5
0.22
0.33
5.24 4.75
7/16 11.1
0.30 0.45 7.09
6.43
112
12.7 0.39 0.58 9.23 8.37
9/16 14.3
0.50 0.74
11.6
10.5
5/8
15.9
0.61 0.91
14.3 13.0
3/4 19.1 0.88 l.31 20.5
18.6
7/8 22.2
1.20
1.79 27.7 25.1
1 25.4
1.57 2.34
36.0 32.7
1-118
28.6 1.99 2.96
45.3 41.1
1-114
31.8
2.45
3.65 55.7 50.5
1-3/8
34.9
2.97 4.42
67.1 60.7
1-1/2
38.1 3.53 5.25
79.4 72.0
*
To convert to Kilonewtons (kN), mUltiply tons (minimum breaking force) by 8.896:
lIb
= 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 wires galvanized at finish size.
104'
Wire Rope Technical Board - Wire Rope
Users
Manual, Fourth Edition
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