Which factor is essential when selecting cribbing points for an unstable load?

• A. Stability
• B. Visibility
• C. Cost
• D. Color

Answer: (A)

Stability of the cribbing point under the expected load is the key factor. When you’re supporting an unstable load, you must place cribbing on surfaces that won’t move, compress, or shift as the load is applied. If a point settles, sinks into debris, or slides, the cribbing can tilt, bind, or fail, sending the load or the cribbing itself into a dangerous uncontrolled movement. Therefore you look for solid, nondeforming bearing surfaces—like intact structural members, solid concrete, rock, or well-compacted ground—that can evenly distribute the weight and resist movement throughout the lift. This stability prevents unintended translation or rotation of the load and keeps the cribbing stack from collapsing.

Other factors like visibility, color, or cost may affect efficiency or ease of operation, but they do not ensure the safe transfer of the load.