When using an extension ladder, how many feet must it extend past the platform for safe usage?

For safe usage of an extension ladder, it is required to extend a minimum of 3 feet beyond the platform or the point of support. This ensures stability when accessing the platform, allowing the user to maintain a secure grip and properly step onto or off of the ladder without compromising balance. The additional height provided by extending beyond the platform creates a safer transition area, helping to prevent falls and accidents during usage. This standard is a critical aspect of ladder safety protocols, ensuring that users can operate ladders effectively while minimizing risks.