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The authors' examination of end plate connections, with particular reference to thin column flanges, provides reassuring evidence of the ductility of such connections, albeit with some loss of strength. The criteria adopted for assessing the yield moment in the tests seem unduly conservative when one considers the well-formed plateaux of the moment-rotation curves. For double beam connections in a multi-storey frame, it would not be unreasonable to anticipate hinge rotations of the order of 30 x 10-3 radian and on this basis J1 almost qualifies as a full-strength connection instead of the half-strength assessment applied by the authors.
J.O. Surtees, J.H. Howlett and R.C. Hairsine
We had expected that the Finniston enquiry and the controversy which surrounds it and
indeed preceded it would become a matter for discussion in this column; Mr. S. B. Tietz takes up the subject when he writes: The evidence by the Institution of Structural Engineers to the Finniston Inquiry is encouraging in its support for technical and individual freedom. Unfortunately some of the bigger Institutions and in particular the Electrical Engineers are favouring various restrictive practices and are going to some lengths to canvass su~aort for such ideas. At a recent meeting they brought Registrars from the USA, Canada and South Africa to explain the way registration worked in these countries. The summaries were of great interest even if a little light on some of the disadvantages of registration.
Designers can conveniently be divided into two camps, those who believe that structures are inherently 'better’if they are designed using the maximum possible rigour and those who do not. The latter believe that the difference between the predictions of the most sophisticated analytical model and the behaviour of a real structure is such that simple methods of design are just as good, if not preferable.
A.W. Beeby and H.P.J. Taylor