An extension ladder must extend how many feet past an upper edge?

The correct answer is that an extension ladder must extend 3 feet past an upper edge. This guideline is crucial for ensuring the ladder's stability and safety when it is being used to access elevated surfaces. Extending the ladder 3 feet beyond the edge provides a secure handhold for the user when stepping on or off the ladder and helps prevent slips and falls, which can occur if the ladder does not have sufficient overhang.

In practical use, this 3-foot extension helps maintain a proper angle for the ladder, allowing it to remain stable and secure while in operation. It's important to adhere to this safety standard to minimize the risk of accidents or injuries while working at heights. Understanding these guidelines is essential for any technician working with ladders in telecommunications or other fields that require access to elevated locations.