You are lifting a 5-ton weight with a single whip rove on a swinging boom set at an angle of 60° to the horizontal. Use the formula for the size of a shackle with a safe working load and determine the minimum size shackle that should be used to secure the head block to the boom?

Question

You are lifting a 5-ton weight with a single whip rove on a swinging boom set at an angle of 60&deg; to the horizontal. Use the formula for the size of a shackle with a safe working load and determine the minimum size shackle that should be used to secure the head block to the boom?

Accepted Answer

Option D: 1 7/8 inch. Boom loading creates high compressive forces and stress on rigging components. Applying standard shackle sizing formulas based on safe working load and dynamic stress factors from a 60-degree boom angle dictates a minimum 1 7/8 inch shackle.

You are lifting a 5-ton weight with a single whip rove on a swinging boom set at an angle of 60&deg; to the horizontal. Use the formula for the size of a shackle with a safe working load and determine the minimum size shackle that should be used to secure the head block to the boom?

You are lifting a 5-ton weight with a single whip rove on a swinging boom set at an angle of 60° to the horizontal. Use the formula for the size of a shackle with a safe working load and determine the minimum size shackle that should be used to secure the head block to the boom?