Under which condition can longshoremen refuse to work based on workload?

Longshoremen can refuse to work based on workload if it is deemed onerous. This means that the workload meets a criteria of being excessively burdensome or difficult to handle safely. The concept of onerous work is crucial in labor practices as it safeguards the health and safety of workers. When a workload is assessed as onerous, it can pose risks to the workers' physical capabilities, potentially leading to injuries or accidents.

In this context, if the workload is indeed labeled as onerous, workers have the right to refuse that work to protect themselves from unsafe conditions. This aligns with health and safety regulations that prioritize workers' well-being.

The other scenarios, such as believing the workload is too difficult, being unfamiliar with the task, or working overtime, do not offer the same protections or justifications for refusal. These situations might involve personal assessments or preferences rather than an objective evaluation of safety and health concerns.