Unified Soil Classification System

by Jim Stevens, Assoc. Prof.; Civ. Engrg. & Environmental Sci., Univ. of Oklahoma, Norman, Okla.,

Serial Information: Civil Engineering—ASCE, 1982, Vol. 52, Issue 12, Pg. 61-62

Document Type: Feature article


The most common soil classification method used by foundation engineers in the United States is A Standard Method for Classification of Soils for Engineering Purposes, ASTM D-2487, usually known as the Unified System. The BASIC program shown in this article classifies soil in accordance with this system.

Subject Headings: Soil classification | Foundations | Systems engineering | United States

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