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The subject of prestressing covers a process that is relatively new and the inventor and chief protagonist of which died only 20 years ago-Eugene Freyssinet. Indeed, the major innovations in prestressed concrete, and the notable structures that have resulted, have come about in the last 40 years or so; the ‘childhood’ will therefore deal only with a short time-span, up to about 20 years ago. F. Walley
The paper describes the design and construction of Adhamiyah Bridge over the River Tigris in Baghdad. Of steel construction acting compositely with a concrete deck, the cable-stayed bridge is the first of this type to be erected in the Middle East. D.J. Lee and A. Wallace
The Institution accepted a suggestion from the Standing Committee on Structural Safety that guidance on the structural use of chipboard for flooring should be produced which would take into account long-term load effects, deterioration, moisture, misuse, vibration, impact, and local application of load. The Standing Committee pointed out that the properties of chipboard are somewhat different from those of traditional flooring materials in that the critical mode of failure is more likely to be by punching or shear, particularly where there are heavy concentrations of applied load. As the Timber Research & Development Association (TRADA) had, at the same time, requested Government financial assistance to produce a similar document, it was agreed that a joint IStructE/TRADA Working Party should be set up to produce a state-of-the-art report on flooring before the end of 1983.