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

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Prepare for the California Structural Steel Contractor C-51 License Exam. Use our flashcards and multiple choice questions, each with hints and explanations. Ensure you are ready for the exam!

Multiple Choice

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

Explanation:
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.

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