According to OSHA, the maximum hook throat opening must not exceed

According to OSHA, the maximum hook throat opening must not exceed

• A. 5% of its original size
• B. 10% of its original size
• C. 15% of its original size
• D. 20% of its original size

Answer: (C)

Wear on a hook opens the throat as the metal gets worn, bent, or deformed from use. If that opening grows too much, the hook can’t grip the load securely and its strength is reduced, increasing the risk of the load slipping or the hook failing. OSHA sets a limit so that this wear doesn’t compromise safety: the throat opening may increase by up to 15 percent of the hook’s original size. If the current opening exceeds that, the hook must be removed from service and replaced. This 15% threshold provides a practical, safety-focused limit that balances usable life with risk control. The other percentages would either allow too little wear (unnecessarily forcing replacement) or permit more wear than the standard permits, which isn’t considered safe. In inspection, also look for cracks, bending, or other deformation that could affect performance.

Wear on a hook opens the throat as the metal gets worn, bent, or deformed from use. If that opening grows too much, the hook can’t grip the load securely and its strength is reduced, increasing the risk of the load slipping or the hook failing. OSHA sets a limit so that this wear doesn’t compromise safety: the throat opening may increase by up to 15 percent of the hook’s original size. If the current opening exceeds that, the hook must be removed from service and replaced. This 15% threshold provides a practical, safety-focused limit that balances usable life with risk control. The other percentages would either allow too little wear (unnecessarily forcing replacement) or permit more wear than the standard permits, which isn’t considered safe. In inspection, also look for cracks, bending, or other deformation that could affect performance.