What is the maximum allowable slope for all benched excavations 20 feet or less in depth?

The maximum allowable slope for all benched excavations that are 20 feet or less in depth is set at a ratio of 3/4 run to 1 rise. This specific slope is important for maintaining stability and safety in excavation sites, as it helps to prevent collapses that could occur if the slopes are too steep. The 3/4:1 ratio strikes a balance between providing adequate support and ensuring that the excavation site is accessible and practical for workers to maneuver safely.

In practical terms, this means that for every 1 foot of vertical rise, there should be a horizontal distance of at least 3/4 foot sloping away from the excavation site. This slope is designed to accommodate natural soil behavior, factoring in the type of soil and moisture conditions that could affect the integrity of the excavation.

Understanding the significance of excavation slopes is vital for plumbing professionals, especially when working on projects that involve underground installation and repair. Safe function in excavation work is not only a regulatory requirement but also crucial for protecting the health and safety of workers on a job site.