---
kind: "section"
citation: "30 C.F.R. § 75.1434"
title: "30"
number: "75.1434"
heading: "Retirement criteria."
url: "https://uscodex.org/cfr/30/75.1434"
---

# §75.1434. Retirement criteria.


Unless damage or deterioration is removed by cutoff, wire ropes shall be removed from service when any of the following conditions occurs:

- (a) **The number of broken wires within a rope lay length, excluding filler wires, exceeds either—**
  - (1) Five percent of the total number of wires; or
  - (2) Fifteen percent of the total number of wires within any strand;
- (b) On a regular lay rope, more than one broken wire in the valley between strands in one rope lay length;
- (c) A loss of more than one-third of the original diameter of the outer wires;
- (d) Rope deterioration from corrosion;
- (e) Distortion of the rope structure;
- (f) Heat damage from any source;
- (g) Diameter reduction due to wear that exceeds six percent of the baseline diameter measurement; or
- (h) **Loss of more than ten percent of rope strength as determined by nondestructive testing.**

## Notes

### Source

Source: Sections 75.1429 through 75.1438 appear at 48 FR 53239, Nov. 25, 1983, unless otherwise noted.

### Authority

Authority: 30 U.S.C. 811, 813(h), 957.

### Source

Source: 35 FR 17890, Nov. 20, 1970, unless otherwise noted.