What are the strength requirements for anchorages used with fall arrest systems?

The strength requirement for anchorages used with fall arrest systems is correctly identified as needing to support a minimum of 5,000 pounds or be able to withstand twice the impact load generated by a fall. This criterion is crucial for ensuring that the anchorage can effectively absorb the forces experienced during a fall, which can be significantly higher than the weight of the employee alone due to the dynamics of the fall.

The rationale behind the requirement for 5,000 pounds, or twice the impact load, is rooted in safety engineering principles, which account for various factors that may affect the conditions under which a fall occurs, including the weight of the worker, the duration of the fall, and any additional equipment that may be in use. This robust safety factor is critical in preventing failures of the anchorage that could lead to injuries or fatalities.

When considering the context of the other options, they do not provide the necessary safety margin or are not aligned with established industry standards for fall protection systems. Each alternative falls short in providing adequate strength for high-risk scenarios, thus emphasizing the careful selection and testing of anchorages in fall arrest systems to safeguard workers effectively.