First published as part of AS C45-1928.Second edition 1950.AS C45-1950 revised and redesignated in part as AS 1243-1972.Second edition 1982.AS 1243-1982 revised and redesignated in part as AS 60044.2-2003.Second edition 2007.Reconfirmed 2016. Originated as part of AS C45-1928. Previous edition AS 60044.2-2003. Second edition 2007.