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Mr. W. G. Cantlay (F): Although I am a partner in the author's firm I had no involvement in this project and would, therefore, ask a simple question. You have stated that you chose steel to achieve speed of erection but you have not stated whether composite construction was adopted forthefloors. I would ask you to make some comment as to whether your choice of steel met the requirement for speed of erection.
In 1969, a study was made of the results of tests on eighty steel-concrete composite beams in which longitudinal shear stress was high, and a new design method for transverse reinforcement in the slab was deduced. This gave a more uniform margin of safety than the method of CP 117 Part 1: 1965, and showed that the amount of reinforcement could be reduced by about 35 per cent.
This paper was prepared as part of the work of the Environmental Wind Committee of the Institution, and the author was assisted by other members of the Committee and by the representatives of the Institution in many countries, as well as by the national standards organizations concerned.