What is the minimum requirement for the side rails of extension ladders above the upper landing surface?

The minimum requirement for the side rails of extension ladders to extend above the upper landing surface is at least 3 feet. This regulation exists to ensure that there is adequate support and safety for individuals transitioning from the ladder to the upper surface. The additional height of 3 feet above the landing provides a secure handhold for the user, reducing the risk of slipping or falling during this critical movement. This height is crucial for maintaining stability and safety, as it allows the individual to grasp the rails and secure their footing before fully transitioning onto the landing. Compliance with this safety standard is essential in preventing accidents and ensuring safe operations when using extension ladders.