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The paper is intended to give designers an understanding and visual appreciation of the way temperature distributions within bridge decks form and change throughout the day. Any temperature distribution is considered as a superposition of a steady state average heat flow between top and bottom surfaces and an hourly changing variation near the surfaces. Both components are analysed by classic theory of conductivity and can often be sketched by eye. The influences of surfacing and lightweight aggregate concrete are indicated.
All members when applying for admission to the Institution sign a declaration that they will be bound by the provisions of the Charter and Bye-Laws and by the Rules of Conduct. For the majority, the latter simply strengthen the duty that they in any case owe to themselves as professional engineers. For some members in their day to day work, however, the Rules call for the observance of long-standing conventions, ignorance or disregard of which places the professional reputation of a member at risk
as well as reflecting adversely upon the Institution itself.
Last month we expressed satisfaction that the decision in Anns‘ case continued to attract discussion because it revealed a serious concern amongst our members about what was in the best interests of the public and also because it helped considerably towards an understanding of what were the responsibilities of the engineer in his various roles. It has been suggested by some that there may be a need for new legislation; in this respect we have had a most interesting letter from Mr. N. Thomas in South Africa. He writes: I have read with great interest two letters from Messrs. Akroyd and Ellis regarding the Anns’ case and potential responsibilities.