What is the minimum overlap required for extension ladders taller than 48 feet?

For extension ladders taller than 48 feet, the minimum overlap required is crucial for ensuring the ladder's stability and safety when in use. An overlap of 6 feet provides the necessary support to maintain structural integrity, particularly when the ladder is extended for various applications.

When it comes to extension ladders, the overlap is the section of the ladder that slides into the next section when extended. Adequate overlap is essential for preventing accidents or failures that could occur due to insufficient support. A 6-foot overlap strikes a balance, providing enough stability without making the ladder cumbersome to use. This requirement is generally established in safety regulations and guidelines to protect users against falls or collapse, which can be catastrophic when working at heights.

The other choices do not meet the established safety standards for tall ladders. Options that suggest less than 6 feet do not provide adequate support for a ladder of that height, which could lead to increased risk of accidents. Thus, a minimum overlap of 6 feet is recognized as both a best practice and a safety requirement for extension ladders over 48 feet.