The Structural Engineer > Archive > Volume 47 (1969) > Issues > Issue 9 > Design and Development of the Concrete Structure. Discussion on the Paper by N.F. Harpu, M.A. Taunto
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Design and Development of the Concrete Structure. Discussion on the Paper by N.F. Harpu, M.A. Taunton and T.W. Coombe

Mr. S. Butler: ‘Having read the paper before I came to this meeting, and from past acquaintance with the aeroplane, I should first like to make a statement and then put a question. I was interested in the mention of seven per cent of take-off weight for the pay load; in fact in the paper it says “Only seven per cent”. This was rather more creditable than one tends to think. For a railway train, thought of as a transport vehicle, I believe it is one per cent, if not appreciably less. I think the optimum in percentage pay load goes to a mini car with four hefty men and luggage, and that makes about thirty to thirty-five per cent.'