TM 5-3810-302-10
WIRE ROPE AND SHEAVES.
The following information is taken from a National Consensus Standard as
referenced by Federal Government Agencies.
All wire rope will eventually deteriorate to a point where it is no longer
useable. Wire rope shall be taken out of service when any of the following
conditions exist:
In running ropes, six randomly distributed broken wires in one lay
1.
or three broken wires in one strand in one lay.
Wear of one-third the original diameter of outside individual wires.
2.
Kinking, crushing, bird caging, or any other damage resulting in distortion of
the rope structure.
Evidence of any heat damage from any cause.
3.
Reductions from nominal diameter of more than:
4.
1/64 inch for diameters up to and including 5/16 inch.
1/32 inch for diameters 3/8 and 1/2 inch inclusive.
3/64 inch for diameters 9/1 6 to 3/4 inch inclusive.
1 /16 inch for diameters 7/8 to 1 1/8 inches inclusive.
3/32 inch for diameters 1 1/4 to 1 1/2 inches inclusive.
In standing ropes, more than two broken wires in one lay in sections
5.
beyond end connections or more than one broken wire at an end connection.
Refuse to work with worn or damaged wire rope.
Demand to see the rope inspection record required by law and inspect the wire
rope yourself. Don't take another person's word.
