Under what condition should damaged wire rope not be used?

The correct condition for not using damaged wire rope is when 10% of strands are damaged within a length of 8 diameters. This guideline is based on established industry standards for the safety and reliability of wire rope in various applications, particularly in lifting and rigging.

When damage occurs in the wire rope, it can significantly reduce its overall strength and integrity. The standard of evaluating the condition of the wire rope by assessing the percentage of damaged strands is crucial in determining whether it can still be safely used. Typically, when inspecting wire rope, a threshold like the 10% criterion provides a clear and measurable standard for identifying unacceptable levels of damage. Beyond this threshold, the risk of catastrophic failure during use increases, which is particularly critical in environments where safety is paramount.

The other conditions mentioned—5% and 15%—either do not meet the recognized safety standards or exceed them without justification. While the choice indicating "under no circumstances" may seem cautious, it does not account for minor damage that might still allow for safe use. Using specific guidelines helps balance safety with practical considerations about the usability of materials. Thus, the assessment based on a 10% strand damage criterion within 8 diameters remains the most appropriate standard for determining whether a