Sling eyes (loops) should not be opened more than what?

• A. 60 degrees or 1/2 the loops length
• B. 45 degrees or 1/3 the loop length
• C. 90 degrees or full loop length
• D. 30 degrees or 1/4 the loop length

Answer: (A)

The main idea is safe limits for how far sling eyes (loops) can be opened to keep load sharing balanced and prevent damage or failure of the sling. The best answer sets a clear maximum: sling eyes should not be opened more than sixty degrees or about half the loop length.

Why this is best: as the angle between the sling legs increases, the force that each leg must carry grows rapidly. Pushing the opening beyond sixty degrees increases the load on each leg and raises the risk of overstressing the sling, slipping, or damaging the loop. The one-half loop length rule gives a practical geometric check to ensure the loop remains properly seated and capable of distributing the load safely.

Why the other limits aren’t used: a smaller angle like 45 degrees is safer but not the standard maximum the rule uses; a 90-degree opening is too wide and creates excessive forces and potential failure; a 30-degree limit is more restrictive than necessary for typical practice.