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SIR,-In your April number, Mr. G. F. Rodmell makes some observations in regard to wide-flanged beams which I ask permission to correct.
Mr. EWART S. ANDREWS, BSc., M.Inst.C.E. (a Vice-president of the Institution, and the Chairman of the Institution’s Science Committee), said that in connection with the preparation of the Report he had persuaded the Committee to follow a practice which he favoured more and more as the years passed, i.e. to make its statements as brief as possible. In his experience the tendency of technical bodies was exactly opposite to that. The successive publications by our American friends became more and more wordy, and when they were compared with the documents from which they had originated his belief was that they became less and less useful. The desire to be allembracing in a general document of this kind was, in his opinion, entirely wrong; simplicity should be the aim. There had been the same tendency towards wordiness in connection with reinforced concrete regulations.
IT is proposed in this paper to consider briefly the causes of impact in the case of
railway and highway bridges, the methods employed in design to cover impact effects,
and modern research into the causes and magnitude of dynamic effects of moving loads.
Arthur A. Fordham