Regarding outriggers, blocking should be at least how many times the surface area of the outrigger pad?

• A. 3 times
• B. 2 times
• C. 4 times
• D. 1 time

Answer: (A)

Blocking under outriggers is about spreading the crane’s load to protect the ground and keep the crane stable. The outrigger pad has a limited footprint, and when you place blocking, you extend that load distribution beyond the pad itself. This helps keep bearing pressure on the ground within what the soil can safely handle and reduces the risk of the pad sinking or the crane tipping. The minimum recommended is a blocking area that is at least three times the surface area of the outrigger pad, giving a conservative margin for typical ground conditions. On very soft or uneven ground, you’d use even more blocking or larger mats to maintain stability, while smaller blocking would provide less spread and could compromise safety.