According to ASME B30.26, multiple slings in the body of a shackle shall not exceed what degree included angle?

• A. 90°
• B. 180°
• C. 150°
• D. 120°

Answer: (D)

This question tests how much angle between multiple sling legs passing through a shackle is acceptable for safe loading. When more than one sling leg goes through the body of a shackle, the forces from each leg don’t pull straight in line; they create a lateral component on the pin and the body. As the included angle between the legs increases, this sideways load increases the bending and bearing stress on the shackle, raising the risk of pin shear or body failure.

ASME B30.26 sets the limit to keep these loads within the shackle’s design capability. The maximum allowed included angle for multiple slings in the body is 120 degrees. Keeping the angle at or below this helps ensure the load is distributed more safely and the shackle isn’t overstressed.

So, the safe, correct rule is that the included angle should not exceed 120 degrees.