What is the maximum height above catwalks or lofts that the top of an extension ladder should extend?

The correct answer highlights that the top of an extension ladder should extend a maximum of 3 feet above catwalks or lofts to provide safe access and egress. This extension is crucial because it allows the user to maintain three points of contact while climbing or descending, which significantly increases stability and reduces the risk of falls.

When the ladder extends beyond 3 feet, it can become more difficult to maneuver safely, and the added height can make the ladder less stable, increasing the risk of accidents. Therefore, adhering to this guideline is essential in ensuring safety while using extension ladders in elevated work situations.

In addition, other height options either extend beyond this safe threshold or do not provide enough height for safe access, which can lead to potential hazards when using the ladder.