What is the maximum vertical bench height for excavations 20 feet or less in depth?

The maximum vertical bench height for excavations that are 20 feet or less in depth is 4 feet. This regulation is put in place to enhance safety for workers in excavation sites. When excavations have a depth of 20 feet or less, maintaining a bench height of no more than 4 feet helps to minimize the risk of cave-ins and provides a stable, safe working environment. By adhering to this limit, the workplace conditions can be made safer, as benches serve as steps or ledges that allow for easy access to the excavation while also reducing the potential for soil movement and associated hazards.

Other heights such as 2 feet, 6 feet, and 8 feet exceed the recommended guidelines for excavations of this depth, which could compromise the safety protocols established to protect workers. Therefore, the choice of 4 feet aligns perfectly with the safety standards in excavation practices.