Maximum allowable number of broken wires, Speed – Harrington Hoists and Cranes RH Wire Rope Hoist User Manual
Page 52
52
Table 5-8 Wire Rope Wear Dimensions (continued)
Hoist
Size
Rope Diameter
Maximum Allowable Number of Broken Wires
Rope
Construction
Rope
(mm-
spec.)
For 6xDia. Length
For 30xDia. Length
Standard
Discard
No.
Broken
Wires
Length
(in)
No.
Broken
Wires
Length
(in)
(mm)
(mm)
(in)
4
15
14.0
0.55
Normal
15-M
14
3.5
29
17.7
15-A
14
3.5
29
17.7
Anti-revolving
15-A
2
3.5
4
17.7
16
14.9
0.59
Normal
16-B
7
3.8
14
18.9
16-M
7
3.8
14
18.9
16-A
7
3.8
14
18.9
Anti-revolving
16-B
2
3.8
4
18.9
16-M
2
3.8
4
18.9
16-A
2
3.8
4
18.9
Table 5-9 Braking Distance (inches) With Nominal Load
No. of Falls
Speed
HOIST SIZE*
⇒
1
2
3
4
2 Fall
48 ft/min
Maximum Limit Before Adjustment
4.72
5.91
7.10
8.27
Best Value Following Adjustment
1.57
1.97
2.36
2.76
32 ft/min
Maximum Limit Before Adjustment
3.54
4.72
5.91
7.09
Best Value Following Adjustment
1.18
1.57
1.97
2.36
4 Fall
24 ft/min
Maximum Limit Before Adjustment
2.36
2.95
3.54
4.13
Best Value Following Adjustment
0.79
0.98
1.18
1.38
16 ft/min
Maximum Limit Before Adjustment
1.77
2.36
2.95
3.54
Best Value Following Adjustment
0.59
0.79
0.98
1.18
*To determine the hoist size, refer to Section 2.1.2.