When using a portable ladder for access to the upper landing, how long must the side rails extend?

The correct standard for the extension of side rails on a portable ladder when accessing an upper landing is three feet. This requirement ensures that there is sufficient support and stability when the ladder is placed against a structure. Extending the side rails beyond the landing provides a secure handhold for users as they step on or off the ladder, which is crucial for maintaining safety and preventing falls.

In practical terms, this three-foot extension allows the individual climbing the ladder to have a firm grip on the ladder's side rails when accessing the platform or upper surface. The additional height also assists in creating a wider base of support, which is essential for the overall stability of the ladder during use. Achieving compliance with this safety measure is important for any contractor or individual working with ladders to minimize risk and promote safe work practices.