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IT is proposed in the following pages to write generally on the theoretical and practical aspects of elastic stability. No doubt part, of the ground covered is already familiar, but it is considered necessary to include the elementary principles, so that there may be as few gaps as possible in the argument. Thus we may have some idea of the theoretical effects of various combinations of loading and end conditions and it may then be seen to what extent we are justified in relying on any particularly fixed or stlereotyped method of design for such a wide range of conditions. A. Noel Procter
Mr Philip Reece (F): It has been mentioned already that the trussed rafter industry is now 15 years old, and I think it is by no means too soon for Mr Ransom to peer into the future and see what possible dangers are awaiting the use of the trussed rafter on a big scale. There will be, and are, plenty of legitimate criticisms. After 15 years, it is unlikely that such a revolution as we made in the building industry would go by without leaving some traces somewhere. But let us not lose sight of what the trussed rafter has achieved for us.
Mr. Dorman: ‘Judging by the number of enquiries relating to the merits of various roofing systems received by the BCSA central office, Dr. Buchholdt is to be congratulated on producing a timely paper. It will be of considerable value to have this present study, with its summary of the state of the art in the design of tension structures, and one would certainly hope that this paper will go some way towards bridging the “credibility gap” between research and development activity on the one hand, and design practice on the other.'