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The authors have presented an interesting method for the rapid estimation of maximum bending moments in decks of suspension bridges. Their approximate analysis draws to a
logical conclusion the more general method described by Bowen and Charlton (reference 3 of the paper). It is clear that the use of symmetry and antisymmetry offers a considerable computational advantage :two sets of three linear simultaneous equations are solved far more quickly than one set of six.
F. Van der Woude, M.S. Gregory and H.I.A. Hegab
Mr. P. B. Ronan: I would like to ask the authors if in retrospect they felt that the site investigation, in particular for a building of this magnitude, was adequate with particular reference to the two boreholes which were put down to give information about groundwater?
Sir Alfred Pugsley (F) : I will just devote a few minutes, by way of introduction, to the place of history in the teaching of structural engineering.