What type of blocking or cribbing is not recommended under the outrigger float?

In the context of using outriggers on mobile cranes, the type of blocking or cribbing that is not recommended is span blocking. This choice refers to a method where blocks are laid across the ground in a manner that could potentially create instability or fail to distribute the loads properly. Span blocking does not provide adequate support for the outrigger float, which is essential for maintaining the crane's stability while in operation.

Providing stable and safe support under the outrigger float is critical since a mobile crane's effectiveness and safety are heavily reliant on its base support. Square blocking, wedge blocking, and safety blocking are all methods that offer more reliable load distribution and stability for the outrigger system. Unlike span blocking, these alternatives utilize solid configurations that enhance the crane's ability to operate safely without the risk of tipping or sinking into the ground.