What defines a "Critical Lift" in terms of crane or derrick operations according to OSHA 1926.753?

A "Critical Lift" is specifically defined by OSHA guidelines to ensure safety during crane operations. It refers to situations where the load being lifted exceeds a certain percentage of the crane's rated capacity, which increases the risk involved in the lift. The definition states that a lift is considered critical when it exceeds 75% of the crane’s rated capacity.

This threshold is significant because lifting loads that approach or exceed this percentage can lead to increased stress on the crane and its components, potentially resulting in failure if not properly managed. When operating at or above this level, it is essential to take extra precautions, such as establishing a documented lift plan, engaging additional supervision, and ensuring that all personnel involved are properly trained. This approach minimizes the risks of accidents and enhances overall safety during operation, aligning with OSHA's mission to protect worker safety and health.