Carl H. Giroux, 87, a consulting electrical and mechanical engineer, died Monday at George Washington University Hospital.

An independent consultant since retiring from the federal government in 1960, he had been active to the present, working from an office at his home in Bethesda.

Mr. Giroux was director of industrial resources for the International Cooperation Administration when he retired from government. Before that he had been a civilian employee with the Army Corps of Engineers from 1924 to 1957, attaining the position of Special assistant to the chief of engineers.

Born in Alamosa, Colo., Mr. Giroux earned a degree in electrical engineering from the University of Colorado. He worked for the General Electric Co. in Schenectady, N.Y., before joining the government.

As a private consultant he was associated with the Bechtel Corp. on the Columbia River Wells project and the Chunju project in Korea. He also was on the board of consultants for a number of dam projects in the state of Washington and in Turkey.

Mr. Giroux had served as a private consultant to the Army Corps of Engineers on expansion of the Ryukyu power system in Oklahoma, to the Administration Nacional de Electricidad on the Puerto Embalse project in Paraguay, and to the Aichi Corp. on an irrigation project in Nagoya, Japan.

He was a fellow of the American Institute of Electronic and Electrical Engineers and a member of the Washington (D.C.) Society of Engineers, the Society of American Military Engineers, the Conference Internationale Grandes Reseaux Electrique and the Newcomen Society of North America. He belonged to the Congressional County Club.

There are no immediate survivors.

It is suggested that expressions of sympathy may be in the form of contributions to the Metropolitan Heart Guild.