Under what conditions does OSHA require a rope to be taken out of service?

OSHA mandates that a rope must be taken out of service under specific conditions that indicate it may no longer perform reliably or safely. The correct answer includes abnormal wear, cuts in the fiber, and variations in shape or size due to roundness.

Abnormal wear signifies that the rope has experienced deterioration, which can compromise its strength and effectiveness. Cuts in the fiber are critical concerns as they indicate potential failure points that could lead to a catastrophic break when the rope is under load. Variation in shape or size, particularly in roundness, can also impact the rope's load-bearing capacity and make it less effective for lifting or rigging purposes.

The other options present factors that may not directly reflect critical safety concerns according to OSHA standards. While minimal moisture, color fading, or heavy staining may affect the rope's appearance, they do not necessarily indicate that the rope is unfit for use. Growth of mold may also suggest a need for cleaning or inspection, but not necessarily removal from service unless accompanied by significant structural concerns.

Therefore, understanding and recognizing signs of wear and tear consistent with the requirements outlined by OSHA is essential for maintaining safety in rigging and lifting operations.