What is the function of cribbing in stabilizing an aerial device on soft ground?

• A. To extend the reach of the platform
• B. To anchor the outriggers and reduce movement
• C. To provide a solid contact surface for stability
• D. To weigh down the device

Answer: (C)

When stabilizing an aerial device on soft ground, the key is turning yielding soil into a solid, level foundation. Cribbing accomplishes this by stacking rigid blocks under the outriggers or feet to create a stiff, continuous contact surface. This distributes the device’s weight over a larger area and across multiple contact points, so the ground is less likely to compress or shift, which helps prevent sinking, rocking, or tipping. In short, cribbing provides a solid, stable base that keeps the platform level and secure during operation. It isn’t used to extend reach or simply weigh down the unit; its purpose is to create that dependable, stable contact surface on soft ground.