How many feet must side rails on a portable ladder extend above an upper level?

The requirement for side rails on a portable ladder to extend above an upper level is set to ensure safety during use. When the side rails extend at least 3 feet above the upper surface, they provide a stable handhold for the user as they transition from the ladder to the upper level or vice versa. This height allows for sufficient grip, reducing the risk of slips and falls, which are common hazards when using ladders.

In ladder safety standards, the 3-foot extension is specifically designed to provide that extra measure of security, offering users ample height to safely maneuver and maintain balance while either stepping off or climbing onto the ladder. By recognizing the importance of such standards, it becomes clear that having the right height for side rail extensions is crucial in promoting safer work environments.