Which of the following is not considered duty cycle work?

The concept of duty cycle work refers to the sustained operation of equipment over a period of time, particularly involving repetitive actions that place mechanical demands on the crane. In this context, tandem lifting operations involve lifting loads with multiple cranes working together, which typically requires coordination and can involve various operational pauses or adjustments due to the complexity of such lifts.

Single lifting operations and frequent lifting and lowering are activities that can be part of a duty cycle, as they both indicate a repetitive and sustained use of the crane. Continuous operation without interruption also fits the definition of duty cycle, as it involves ongoing work without scheduled breaks.

However, tandem lifting operations, while they involve lifting, are generally not classified as duty cycle work because they can include significant periods of setup, coordination, and potential delays while working with multiple cranes. These elements reduce the overall repetitive nature and sustained operations characteristic of duty cycle work, making it the correct choice for identifying which activity does not fit within that definition.