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The Structural Engineer, Volume 50, Issue 10, 1972
Reproduced herewith are the four parts of the new Rules of Conduct which from 1 October 1972 replace all previous Rules of Conduct and, in particular, those dated 1 October 1964.
A symposium was organized by the Institution in London from 17-19 May 1966 on the subject of Industrialized Building and the Structural Engineer. Following this, two ad hoc committees were appointed by the Council to prepare reports Stability of modern buildings and Design for indusfrialproducfion. The first of these was introduced at a meeting of the Institution on 27 January 1972 by L. R. Creasy. The second was completed shortly after the 'Stability' report and was published in November 1971.
The paper examines the lateral stability of beams which are supported at points within their length by elastic restraints capable of providing lateral, torsional or combined restraint. Relationships are provided between the buckling load and non-dimensional lateral and torsional restraint stiffness parameters. The increase in stability resulting from the use of bracing capable of providing both types of restraining action is shown fo be considerable, restraints only a few times as 'stiff' as the beam itself being capable of providing 'complete support' i.e. inducing nodes at the restrained cross-sections. Charts are presented which give the theoretical limiting values which the restraint stiffnesses should have in order to provide 'complete support'. For torsional restraints the influence of the method of attachment is also considered in some detail. D.A. Nethercot and K.C. Rockey