To get the maximum use of a gin-pole derrick, rig with at least _____ guy wires

To get the maximum use of a gin-pole derrick, rig with at least _____ guy wires

• A. 3
• B. 2
• C. 4
• D. 5

Answer: (C)

Stability in multiple directions is the key idea. A gin-pole derrick creates a tipping and side-to-side moment as the load is raised, so you counter those forces with guy wires anchored to solid points. Using at least four guy wires gives you two independent bracing planes around the base, which keeps the derrick plumb and resisting movement in both fore-aft and side-to-side directions. This setup lets you utilize more of the derrick’s lifting capacity safely. With fewer than four, stabilization in one direction is weaker, limiting how effectively you can use the crane and increasing the risk of tipping or excessive deflection.

Stability in multiple directions is the key idea. A gin-pole derrick creates a tipping and side-to-side moment as the load is raised, so you counter those forces with guy wires anchored to solid points. Using at least four guy wires gives you two independent bracing planes around the base, which keeps the derrick plumb and resisting movement in both fore-aft and side-to-side directions. This setup lets you utilize more of the derrick’s lifting capacity safely. With fewer than four, stabilization in one direction is weaker, limiting how effectively you can use the crane and increasing the risk of tipping or excessive deflection.