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Under the chairmanship of the President, Mr. A.J. Harris, BSc, CEng, MIStructE, MICE opened the debate in support of the motion ' That structural design is best carried out in professional offices ' and was followed by Mr. J.A. Derrington BSc(Eng), CEng, MIStructE, MICE who opposed it. This debate took place against the background of the note which appeared in The Structural Engineer, January 1967, pp. 3-4. At the end of the evening the two camps were equally populated and it was the Chairman's casting vote that carried the motion.
The Chairman: 'I think perhaps Mr. Reece has been a little less controversial than I had hoped he would be, but I trust that there are members in the audience who will draw out the very finest which Mr. Reece can produce in the discussion to follow. I think the open frankness of general approach in the paper is one which made me rather proud that we had a contributor who would write things in such terms, and we as an Institution were prepared to publish, for instance, such a statement as appears in the paper at the bottom of page 102, " What do we do about this?" Also, "Do we give up the analytical ghost...". It is that kind of expression which I think has a lot of hard thinking behind it.'
The process of prestressing can be used to advantage in improving the general performance and load-carrying capabilities of structures of composite construction involving interaction between structural steel and concrete, whether plain or reinforced. Up-to-date, the most notable successes have been achieved with bridge decks and composite floors in order to prevent development of shrinkage cracks in the concrete or to counteract negative bending effects over the supports.
Professor Sean Mackey and Leung Kui-Wai