TM 55-2200-001-12
Change 3
Section No. 1--General Rules (Rev.-11--1978)
(n)
WIRE ROPE AND/OR CABLE, Dimensions, Strength, Securement.
Plow Steel (6 x 7) Hemp Center
Plow Steel (6 x 19) Hemp Center
Minimum
Minimum
Minimum
Minimum
Minimum
Joint
Number
Minimum
Joint
Number
Diameter
Strength-
Strength-
Clips or
Diameter
Strength-
Strength-
Clips or
Inches
Pounds
Pounds
Clamps
Inches
Pounds
Pounds
Clamps
3/4
8,800
7,400
2
3/8
9,200
7,800
2
1/2
15,500
13,100
3
1/2
16,200
13,800
3
5/8
24,100
20,400
3
5/8
25,200
21,400
3
3/4
34,400
9,200
4
3/4
36,000
36,000
4
7/8
46,400
39,400
4
7/8
48,700
41,400
4
1
60,000
51,000
4
1
63,300
53,800
4
Note (a).
The number of clips and/or clamps shown above is the minimum for safe operation. Proper type of
cable clip and/or wire rope clamp suitable for the type and size of cable being applied must be
used. In applying wire rope clips and/or clamps, the "U" bolt or bolt assembly must be applied on
the short end of the rope. The distance between clips and/or clamps should be equal to six times
the rope diameter. When the number of clips and/or clamps shown in the table is used and clips
and/or clamps are properly applied, they will develop 85 percent of the minimum breaking strength
of the wire rope and/or cable.
Note (b).
Values shown under "Minimum Breaking Strength-Pounds" in the above tables are based on 87
percent of the breaking strength of the wire rope and/or cable as supplied by the manufacturer. The
minimum number of clips and/or clamps shown are based on manufacturers' recommendations.
Note (c).
3/8 diameter (6 x 19) cable may be substituted by 5/16 galvanized aircraft cable (7 x 19) strand,
using tools designed for securing cable with the following approved aluminum connectors: (1) one
aluminum connector using a minimum of five (5) mechanical machined crimps and/or (2) one inch
closed aluminum connector using a minimum of two (2) mechanical machined broad crimps and/or
(8) one three inch open sided aluminum connector using a minimum of four (4) mechanical
machined crimps.
EXAMPLES FOR APPLYING "U" BOLT CABLE CLIPS AND/OR CLAMPS
TYPE III, CLASS 2 DOUBLE GRIP
DOUBLE SADDLE WIRE ROPE CLAMP
(FEDERAL SPECIFICATION FF-C-450C,
LATEST REV.)
Sketch 1
Sketch 2
D-32.4
