A ladder should extend at least how many feet above its point of contact with the roof?

A ladder should extend at least three feet above its point of contact with the roof to provide a safe handhold for individuals getting on or off the roof. This extension is crucial because it helps ensure stability and prevents slipping or losing grip, especially when transitioning from the ladder to the roof or vice versa. It allows the user to grasp the ladder securely while stepping down, reducing the risk of falling.

The three-foot extension exceeds the minimum height requirement, which enhances safety measures during the ascent and descent. This precaution is vital in various industries where ladders are frequently used, as it promotes proper ladder usage and mitigates the potential for accidents related to ladder safety.