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PRELIMINARY REMARKS BY THE AUTHOR.
In submitting this paper for your consideration I would like to explain for the benefit of those who do not know me that I am not a legal man but an engineer like yourselves, and, incidentally, a contractor, and if, as such, I am dealing with rather an unusual subject, I am doing so in the hope that a layman’s experience may be of interest. I do not propose to read the paper, which, no doubt,you have all had the opportunity of perusing, and which I trust will at least, have the effect of bringing to your notice some points of law of which previously you may not have been aware.
I propose in this address to invite your consideration of some of the principles upon which our present day structural design is based and to remember some of the scientists of bygone days to whom we are indebted for the discovery of these principles.
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