American Society of Civil Engineers


Unified Soil Classification System


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

Civil Engineering—ASCE
, Vol. 52, No. 12, December 1982, pp. 61-62

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Document type: Feature Article
Abstract: 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.


ASCE Subject Headings:
Soil classification
Computer applications