For on-rubber lifting, capacities should not exceed what percentage of tipping?

In the context of on-rubber lifting, the capacity should not exceed 75% of the tipping capacity when utilizing rubber tires for stability. This is essential because lifting beyond this threshold could compromise the safety and stability of the equipment. The rationale is based on ensuring that the center of gravity remains within a safe range, preventing the risk of the crane tipping over during operation.

When operating on rubber tires, the vehicle's stability is particularly dependent on the load distribution and the strength of the tires. If the load exceeds 75% of the tipping capacity, there is a significant risk of causing the crane to topple over, which can lead to accidents and potential injuries. Therefore, adhering to the 75% guideline helps maintain a safety buffer, ensuring safer operations in various lifting scenarios.

Understanding this principle is crucial for anyone involved in crane operations or equipment handling, as it emphasizes the importance of following published capacity ratings to ensure safe and effective lifting practices.