What ground conditions require outrigger mats or cribbing?

• A. Any ground condition is acceptable
• B. Level, solid ground is required; on soft, uneven, or unstable surfaces use mats, cribbing, or pads to distribute load and stabilize outriggers and equipment.
• C. Mats are never needed
• D. Only when it is raining

Answer: (B)

Outriggers need a stable, level base to keep the equipment from tipping. If the ground is soft, uneven, or otherwise unstable, the crane can sink, shift, or become unbalanced under load. Mats or cribbing spread the load over a larger area and fill gaps, creating a solid, level footing for the outriggers and the machine. Mats act as a wide, supportive pad under the outrigger feet, while cribbing stacks provide a stable platform on uneven terrain. On level, solid ground, you may not need them, but on soft or irregular surfaces they’re essential to maintain stability and safety.