Ladders should extend past the roof edge by how much?

When using ladders for accessing elevated areas such as rooftops, it's essential to ensure safety and stability. Extending the ladder beyond the roof edge by a specified amount helps prevent accidental slips and enhances the overall grip and support when getting on or off the roof.

In this context, extending the ladder three feet past the roof edge is the standard recommendation. This length provides a safer transition area when climbing onto a rooftop, allowing the individual to maintain a secure hold on the ladder while stepping onto the roof. Additionally, this extension helps prevent the ladder from slipping or shifting, which can happen if it’s positioned too close to the edge or not extended far enough.

The other choices suggest shorter extensions, which may not provide adequate support or transition space. Therefore, three feet is recognized as the appropriate and safest practice to ensure that individuals can safely navigate between the ladder and the roof.