Laboratory Soil Classification: Quality Control for Engineering Design and Inspection

Sieves are an integral part of soil classification. Sieving a soil sample of a known dry weight by shaking it through a stack of sieves of designated sizes produces what's known as a grain size distribution curve. This provides information about what proportion of the soil is composed of fines, sand, and gravel. Combined with Atterberg Limits or hydrometer tests to determine the nature of the fines (silt and/or clay), this allows us to provide an industry standard classification, which in turn qualifies or disqualifies the soil for a variety of applications on a given jobsite based on specification.

The ability to predict the behavior of soil is essential to an engineer's design and construction plan, as well as being key to an effective quality assurance system for field inspection. Soil classification provides an easy check on whether the right material is being used or if something has changed and further testing is required. Accurate soil classification is a vital aspect of keeping a project on schedule and error free, and is just one of many services our lab provides.








Foundation Test Group (FTG) is a certified Women-Owned (WBE) engineering and testing company networked to support design and construction projects for a diverse group of Engineers, Architects and Contractors as well as multiple state and local governments. Our firm seeks new relationships with teaming partners to provide state of the art support in a strong, but niche market.

Foundation Test Group., Inc.
11408 Cronridge Drive, Suite K
Owings Mills,MD 21117
Phone: 410-517-0715 Fax: 410-517-0716