Durability in Design. Discussion on the paper by T. O’Brien MA BSc

Mr. K. F. Simm (of Freeman Fox & Partners) writes: ' The computer program described by the author greatly simplifies the analysis of reinforced concrete columns subject to bi-axial bending. It has been used in my office for some time and the data preparation is very much easier than the laborious hand calculation involved in Saville's method. '

A message of congratulations and good wishes to the 13,000 members of the Institution from HRH Prince Philip, an Honorary Member, was read to the 400 guests who assembled at the Luncheon at the Dorchester Hotel in London on 20 March last to mark the 60th Anniversary of the Institution's formation in 1908. Among the many distinguished guests were Professor Pier Luigi Nervi and his wife who were making one of their rare visits to London for the occasion.

At present, the requirements for structural concrete are specified in five different Codes of Practice. These Codes have been drafted at different times and it is not surprising that they differ considerably in those sections related to the specification and production of the concrete. This paper describes the development of the requirements for concrete in the Codes from 1934 to 1965. D.C. Teychenné