What is the minimum length of overlap required between two sections of a 30' extension ladder?

The minimum length of overlap required between two sections of a 30-foot extension ladder is 3 feet. This requirement is important for ensuring stability and safety when using the ladder, especially when extended to its full height. The overlap allows for adequate support and minimizes the risk of the extended sections separating or shifting during use, which could lead to accidents or falls.

In general, ladder safety guidelines specify this overlap to ensure that the ladder can bear the weight applied to it and maintain its structural integrity when a person climbs or works from it. Using the correct overlap is part of best practices in ladder safety training, helping apprentices understand both the practical aspects of ladder use and the necessary precautions to prevent injuries.