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Dr. L. A. Clark has discussed (The Structural Engineer, Vol. 56A, Sept. 1978, p. 244) the complexity introduced into concrete bridge design by the temperature changes and differences specified in BS 5400: Part 2: 1978. Similar problems arise in the design of
composite bridge decks. An appropriate method of analysis and several worked examples have therefore been given in a Commentary on BS 5400: Part 5: Composite bridges.
The Panel was established in December 1977, with Dr. Wm. Henderson (Vice-president) as Convener. The first report has been adopted by the Structural Codes Advisory Committee and Council, and the Panel has been requested to proceed with the preparation of the second report mentioned in the final paragraph.
New investment is being made in coalmining. Existing mines are being re-equipped to exploit further reserves, and new ones are being planned to open up newly discovered coalfields-in the case of Selby, sinking has commenced. Reference is made to previous papers which describe and illustrate post-1945 colliery reconstruction works: this paper deals with changes that have taken place since then.