Edwin T. Pairo, 93, a Washington architect who retired from the firm of Chatelain, Gauger and Nolan in 1974, died Nov. 18 at Manor Care Nursing and Rehabilitation Center in Chevy Chase after a stroke.

Mr. Pairo began his architectural career in 1928 with the Washington architectural firm of Philip M. Julien. In 1929, he won first prize in the Paris Beaux Arts Institute competition. Later, he worked for Allied Architects and as a civilian for the Army's Quartermaster Corps.

From 1936 to 1953, he was an architect for the public housing agency of the federal government, serving in Washington, Atlanta and Richmond. In 1953, he left government service and joined Chatelain, Gauger and Chatelain, where he became a partner and chief of specifications.

He was instrumental in the formation of the Construction Specifications Institute. He was chairman of its first national convention in Washington in 1957, president of the D.C. Metropolitan chapter in 1959-60 and national president in 1963.

A resident of Chevy Chase, he was born in Washington. He graduated from McKinley Tech High School and Catholic University.

His wife of 65 years, Catherine J. Pairo, died in 1997.

Survivors include three children, Mary Lou Pairo of Chevy Chase, William E. Pairo of Wheaton and Winifred P. Offutt of Walkersville; four grandchildren; and three great-grandchildren.