To ensure load chart ratings are valid, a crane must be level within what percentage?

A crane must be level within 1% to ensure that load chart ratings are valid. This specification is crucial because a crane that is not level can significantly affect its stability and load capacity. When the crane is tilted, uneven weight distribution can lead to an increased risk of tipping or failure, which poses serious safety hazards.

Maintaining a level position ensures that the load is balanced and that the crane operates within its designed parameters. This is essential for safe lifting operations, as the load chart provides critical information regarding the crane's lifting capability based on various factors including load radius and configuration. Operating outside the specified level tolerance could invalidate the load chart data, posing risks to both operators and on-site personnel.