How is a two person load defined in terms of weight?

A two-person load is defined as 600 lb because this weight is the typical maximum that can be safely handled by two individuals working together in various operational contexts, particularly in environments like construction or logistics. This standard helps ensure safety and prevents overexertion or injury that could arise from pushing beyond recommended lifting limits.

The specification of 600 lb aligns with ergonomic guidelines designed to balance efficiency and safety during manual handling tasks, emphasizing the importance of minimizing risk in workplaces where heavy loads are common. The other weight options exceed the generally accepted limit for two people, which could lead to unsafe lifting practices and the potential for accidents or injuries, reinforcing the rationale behind the 600 lb standard.