Wire rope must not be used if the number of broken wires exceeds what percentage?

The correct answer of 10 percent is significant in ensuring the safety and integrity of wire rope. When evaluating the condition of wire rope, the percentage of broken wires is a critical factor in determining whether the rope is safe for continued use. If the number of broken wires exceeds 10 percent, it indicates that the rope may have sustained significant wear or damage, potentially compromising its strength and performance during operational use.

Maintaining a threshold such as 10 percent for broken wires helps prevent dangerous failures during lifting or rigging operations, where the integrity of the wire rope is essential for safety. Regular inspection and adherence to this guideline are crucial in industries utilizing wire ropes, such as construction and industrial sectors, to ensure the equipment is within safe operational limits.

The emphasis on the 10 percent threshold stems from industry standards and practices designed to protect workers and equipment by ensuring that worn or compromised wire rope is identified and replaced before it poses a risk.