Unified Soil Classification System (USCS)

The Unified Soil Classification System (USCS) is a standardized method used by engineers to categorize soils based on their properties, mainly grain size and behavior. It helps predict how soils will perform under different conditions, such as supporting structures or withstanding pressure. Soils are classified into groups like sands, clays, silts, and gravels, with specific codes indicating their characteristics, such as stability or workability. This system ensures clear communication and proper decision-making in construction, foundation design, and geotechnical assessments by providing a consistent way to describe soil types.