To balance an unstable guy derrick, which measure is used?

To balance an unstable guy derrick, which measure is used?

• A. Extra guy lines
• B. Additional counterweights
• C. Shims
• D. Brace plates

Answer: (A)

The stability of a guy derrick comes from its guy lines. When the rig is unstable, the corrective measure is to add extra guy lines (or tighten existing ones) to increase lateral resistance and keep the derrick upright against wind and hoisting forces. Additional counterweights are used for other crane configurations to balance vertical loads, not to stabilize a guy derrick. Shims are for leveling or alignment, and brace plates strengthen connections but don’t provide the external stabilization needed to balance the mast.

The stability of a guy derrick comes from its guy lines. When the rig is unstable, the corrective measure is to add extra guy lines (or tighten existing ones) to increase lateral resistance and keep the derrick upright against wind and hoisting forces. Additional counterweights are used for other crane configurations to balance vertical loads, not to stabilize a guy derrick. Shims are for leveling or alignment, and brace plates strengthen connections but don’t provide the external stabilization needed to balance the mast.