What percentage of the perimeter of a personnel platform must contain a grab rail, except for gates?

The correct answer is based on safety regulations that require a personnel platform to have a grab rail for the protection of workers at all times. According to these regulations, 100 percent of the perimeter of the personnel platform must be equipped with a grab rail, with the exception of any gates that may be present.

Having a grab rail along the entirety of the platform's perimeter ensures that workers are protected from falling off during operations at height. It provides a continuous support system, contributing to the overall safety of the personnel using the platform. The requirement for the grab rail to encompass the entire perimeter, except for designated entry points such as gates, reinforces the importance of maintaining a secure working environment. Thus, ensuring complete coverage by the grab rail is critical for adhering to safety standards in the construction and operation of personnel platforms.