What classification does the soil shift to when cracks are present in an open excavation?

When dealing with soil classifications in the context of excavation and construction, the presence of cracks in an open excavation suggests that the soil is likely experiencing stress or weakening. This situation indicates that the soil may have difficulty maintaining its structural integrity under existing conditions.

The classification of "potentially hazardous" is appropriate in this scenario because cracks may signal that the soil is unable to support loads adequately or may lead to a collapse of the excavation. This classification alerts contractors and safety personnel to the necessity for additional precautions and assessments to ensure the safety of workers and the integrity of the construction site. The identification of potentially hazardous soil helps guide the implementation of safety measures, such as shoring or additional bracing, to mitigate risks associated with soil instability.

Understanding the implications of soil conditions is key in construction practices, as proper management of potentially hazardous situations reduces the risks of accidents, injuries, and structural failures.