1904-1909

• Inaugural convention of the National Association of Cement Users (NACU) organized

Making concrete blocks, 1904

1904-1909

• Richard L. Humphrey chosen as first President

Richard L. Humphrey

1910-1914

• First “building code” appeared

• Name changed to American Concrete Institute

Grafton Bridge, 1910

1915-1919

• Leonard C. Wason, ACI’s second President

• ACI assists war effort; war curtails activities, convention delayed

U.S.S. Selma, 1919

1915-1919

• ACI headquarters established in Detroit; Harvey Whipple appointed Secretary

Harvey Whipple

1920-1924

• Committees arranged by groups and numbered for first time

• 20th anniversary of ACI; standard reinforcing bar sizes adopted

1925-1929

• Richard L. Humphrey leaves Board after 21 years, named the first ACI Honorary Member

• Membership passes 2000

Hangar at Orly Airport, 1921

1925-1929

• First edition of Concrete Primerby F.R. McMillan published

• The ACI Journal introduced and published 10 times per year

F.R. McMillan

1930-1934

• Depression brings cost cutting and reduction of Journalpages; budget cuts force limit on paper length

• Financial crisis continues; Journalissues reduced to five issues per year Hoover Dam, 1933

1935-1939

• Effects of the Depression diminish; membership level stable after losses during the Depression

• First Reinforced Concrete Design Handbook on working stress design published

Hangar in Italy, 1936

1940-1944

• First Building Code under ACI 318 issued; ACI Manual of Concrete Inspectionpublished

• ACI turns its attention to the war effort; speeding the results of important committee work into print given priority Self-propelled concrete ship

built during World War II (1942)

1945-1949

• First ACI Book of Standardsissued

• Technical Activities Committee (TAC) formed

ACI Committee 115 meeting, 1948

1950-1954

• Membership passed 5000; first joint committee formed with ASCE

• Harvey Whipple retired after 32 years; William A. Maples appointed Secretary-Treasurer

William A. Maples

1955-1959• Revised Building Code adopted with an appendix on

ultimate strength design

• ACI headquarters building erected in Detroit

ACI headquarters building, Detroit, Michigan, 1957

1955-1959

• First local chapter in Southern California organized

• Journal modernized by use of cover photo; membership topped 10,000

Sam Hobbs, Secretary-Treasurer of Southern California Chapter,

1958-1974

1960-1964

• Institute chapter formed in Japan

• First edition of Formwork for Concrete (SP-4) published

• New ACI logo and motto introduced

ACI’s new logo, 1964

1965-1969

• First commentary to the Building Code published; Institute income exceeds $500,000

• Book of Standardssucceeded by ACI Manual of Concrete Practice

Constructing Habitat ’67 in Quebec

1965-1969

• Katharine Mather, first female Board of Direction member

• First ACI educational seminar held

Katharine Mather

1970-1974

• Educational Activities Committee (EAC) formed

• Membership grade of Fellow established

CEB meeting at ACI, 1975

1975-1979

• Maples retires after 27 years; George F. Leyhbecomes Executive Director

• ACI’s 75th anniversary celebrated

• Concrete International first published

Smithsonian exhibit honoring ACI’s 75th anniversary, 1979

1980-1984• Local chapters total more than 50 with addition of new

chapters in Israel and Korea

• First student chapters established

• ACI certification program launched

Pasco-Kennewick Intercity Bridge

1985-1989

• ACI Structural Journal and ACI Materials Journal debut

• 10,000 technicians certified in the ACI Concrete Field Testing Technician Grade I program

1985-1989

• ACI 318 Building Code and Commentary appear side-by-side for first time

• Metric edition of 318-89 available

1990-1994• ACI assumes Secretariat for ISO/TC-71

• Manual of Concrete Practice available on CD-ROM

ISO Plenary Session

1995-1999

• Completion of new ACI headquarters

• ACI website launched

• George F. Leyh retires; James G. Toscasbecomes Executive Vice President

ACI headquarters, 1996

1995-1999

• Jo Coke becomes ACI’s first female president

• Concrete Repair Manual published jointly with the International Concrete Repair Institute

Jo Coke

2000-2004• 200,000 certification exams administered

• ACI 318-02 Building Code features most comprehensive revision of code since 1971

• First Structural Concrete in the Americas Workshop held with 14 countries participating

Structural Concrete in the Americas Workshop, 2002

2000-2004

• William R. Tolleynamed Executive Vice President

• U.S. House of Representatives passes resolution commending ACI on its 100th anniversary