What is the purpose of outriggers and mats on soft ground?

• A. They are only required for on hard ground.
• B. They reduce crane reach.
• C. They increase the lifting speed.
• D. They distribute load and prevent sinking, providing a stable base.

Answer: (D)

On soft ground, stability hinges on spreading the crane’s weight over a larger area and keeping the base from sinking. Outriggers widen the footprint of the crane, while mats distribute the load across a firmer, even surface and prevent the outriggers from sinking into soft soil. This combination creates a stable base and reduces the risk of tipping while lifting.

Outriggers and mats aren’t about reaching farther or lifting faster, and they’re not only for hard ground. Their role is to keep the crane stable by distributing the load and preventing ground failure, which is why this option is the best description.