When setting up a crane, which load chart must be used if the outriggers on one side could not be extended?

Using the load chart for "on rubber" is the correct choice in this scenario because it specifically addresses the conditions under which the crane is operating when outriggers are not fully extended on one side. When a crane is set up with outriggers only partially extended or not extended at all, it effectively operates with its wheels on the ground, rather than being fully stabilized by the outriggers. This situation requires a different load rating since the crane’s stability and lifting capacity are impacted by the load distribution over its tires rather than the outriggers.

The "on rubber" load chart provides guidelines for how much weight the crane can safely lift under these conditions, taking into account the reduced stability that comes with operating in that mode. It ensures that the operator is aware of the limitations and can prevent potential tipping or overloading scenarios.

Understanding the proper load chart to use is crucial for safe crane operation, ensuring that the load's weight remains within the limits specified for that particular configuration and helping to maintain safety standards on site.