What is required for trenches that exceed sixty inches in depth for safe installation?

When installing trenches that exceed sixty inches in depth, it is essential to provide walls stabilized with shoring devices to ensure safety. Trenches of this depth pose a significant risk of cave-ins, which can cause serious injury or fatality to workers. Shoring devices, such as hydraulic shores or trench boxes, are designed to support the sides of the trench and prevent collapses.

These devices create a stable environment within the trench, allowing workers to safely perform their tasks without the imminent risk of soil failure. Implementing shoring practices is a critical step in excavation safety protocols outlined in occupational safety standards and regulations.

While the other options may play a role in the overall installation process, they do not address the immediate safety concerns presented by deep trenches. For example, pipes may be necessary for the drainage system, backfill material might be utilized after installation, and reinforcements could be relevant in other contexts, but the primary requirement specifically for ensuring safety in deep trenches is the use of shoring devices.