Which arrangement best supports stability when using a lift bag on a box crib?

• A. A solid layer of cribbing under the bag.
• B. Cribbing spaced at even distances apart.
• C. Cribbing placed only on one side.
• D. No cribbing is needed.

Answer: (C)

Stability when lifting with a bag on a box crib comes from creating a broad, level base that spreads the lifting force evenly and resists tipping as the bag inflates. Placing cribbing on only one side makes the base asymmetric and can create a pivot point, causing the load to tilt away from that side or slip. The safest approach is to build a solid, multi-sided cribbing base with cribbing under the bag across its footprint so the lift forces are carried evenly through contact points. In short, full, even support under the bag and the load yields the most stable lift; one-sided cribbing is risky.