Which type of soil is often classified as Type C?

Type C soil is classified as a soil type that poses the highest risk in excavation conditions due to its structural instability and loose texture. Sand, which is commonly classified as Type C, has a granular structure that lacks cohesion, making it particularly susceptible to collapsing when unsupported. This instability can lead to dangerous conditions for workers in trenches or excavation sites.

Understanding the characteristics of Type C soil is crucial for safety protocols in construction and excavation projects. In contrast, materials such as clay and loam exhibit higher cohesion and structural integrity, making them more stable and typically classified as Type A or Type B soils, respectively. Silt also tends to fill voids between other particles, but its properties are not as unstable as those of sand. Recognizing the properties of these soil types helps ensure appropriate safety measures and excavation methods are applied, which reduces the risk of accidents on the job site.