What is the minimum depth of a trench excavation in which a ladder is required to be provided?

The minimum depth of a trench excavation requiring a ladder is established at 4 feet. This requirement is rooted in safety regulations designed to protect workers from falls and to ensure safe access to and from the trench.

At this depth, the hazard of workers potentially falling into or out of the trench increases significantly, necessitating the use of a ladder or similar means of egress. Providing a ladder not only helps workers safely enter and exit the trench but also aids in escaping in case of an emergency.

While other depths may seem relevant for safety considerations, they do not meet the threshold where a ladder is mandated by regulations. Thus, the requirement to provide a ladder begins specifically at a depth of 4 feet to ensure compliance with safety standards.