If a shackle is used at the suspension point, it must be wired shut. True or False?

If a shackle is used at the suspension point, it must be wired shut. True or False?

• A. True
• B. False
• C. Sometimes
• D. Not specified

Answer: (A)

Shackles used at a suspension point must be wired shut to prevent the pin from loosening and the shackle from opening under load. When the shackle is loaded, vibrations, movement, or torque can cause the pin to back out or rotate, which could release the load. Winding a wire through the pin and the shackle holes acts as a simple lock, keeping the pin in place and maintaining a secure connection. This is why the statement is true. If a shackle has a built-in locking feature, it should still be used correctly, but relying on that feature alone without a safety wire isn’t considered as foolproof in many lifting standards.

Shackles used at a suspension point must be wired shut to prevent the pin from loosening and the shackle from opening under load. When the shackle is loaded, vibrations, movement, or torque can cause the pin to back out or rotate, which could release the load. Winding a wire through the pin and the shackle holes acts as a simple lock, keeping the pin in place and maintaining a secure connection. This is why the statement is true. If a shackle has a built-in locking feature, it should still be used correctly, but relying on that feature alone without a safety wire isn’t considered as foolproof in many lifting standards.