When is fall protection needed at a lower height than normal?

Fall protection is required at lower heights than usual when specific conditions indicate an increased risk of falling. In the context of this question, the correct response identifies the height of 4 feet as a threshold for fall protection if such measures are not already in place. This reflects regulatory guidelines that prioritize worker safety in environments where even a low fall could result in serious injury.

The rationale for needing fall protection at this height relates to the potential hazards present in various work environments. In particular, certain areas may have additional risks—such as uneven surfaces, protruding objects, or the presence of machinery—that necessitate protective measures even before reaching the typical standard height of 6 feet commonly recognized in many guidelines.

While it's true that the construction of commercial buildings might enforce stricter regulations, fall protection regulations are not limited to just that sector. Furthermore, the reference to public spaces acknowledges that the need for safety measures can extend beyond specific workplace types. However, the requirement for fall protection specifically at 4 feet highlights circumstances where the risk assessment leads to the need for preventative measures regardless of the established typical height regulations.