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Mr Lee: It will be seen that our paper comprises two parts, the first on design and the second on construction. My co-author for Part 2, Mr Al-Bayah, was very much looking forward to being here in person as one of the representatives of the client and to participating in the discussion. Unfortunately pressure of work in Iraq has not permitted him to come to London at this time. He has asked me to express his regrets and to pass on the good wishes of himself and his colleagues in the Government of Iraq who were concerned with the bridge for an interesting evening of technical discussion.
I think that the general issues raised by the feature are important not only for reinforced concrete construction but also for the future of the whole of British industry. Dr. Beeby’s main plea, I think, is for ‘realistic simplicity’, and I support this completely. Mr. Dennis Cox
This paper describes research on dynamic behaviour of conveyances and mineshaft steelwork. A description is given of the system used for measuring and analysing accelerations and wheel loads in 13 shafts, as well as the simplified theoretical model developed for predicting this behaviour. Results are given of both the measurements and the theoretical predictions, and the relevance of different design parameters is discussed. A tentative design formulation is proposed which includes the most important variables for shafts where resonance does not occur. Factors influencing dynamic magnification are also discussed. G.J. Krige, Professor A.R. Kemp, B. Alport and M. Fotopoulos