What is the maximum horizontal spacing allowed between vertical shores in type B soil at a depth between 5 and 10 feet?

In excavation safety practices, the spacing of vertical shores is crucial to ensure the stability of the excavation and the safety of workers. For type B soil at a depth between 5 and 10 feet, the regulations specify a maximum horizontal spacing of 8 feet between vertical shores. This is based on the characteristics of type B soil, which has medium-level cohesion and is considered to provide moderate support, thus necessitating closer shore spacing than might be required in more stable soils.

Maintaining this maximum spacing helps reduce the risk of soil collapse, which can occur if the vertical shores are too far apart, leading to an increased lateral pressure on the walls of the excavation. Proper spacing ensures that the shores can effectively support the weight of the soil and any equipment or personnel in the vicinity, thus playing an essential role in maintaining safety on excavation sites.