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The Structural Engineer, Volume 48, Issue 4, 1970
The report analyses and tabulates the results of the investigation of 56 major fires, it considers the factors influencing fire limitation and describes each fire investigated. Copies of the Report are available from the C & CA, 52 Grosvenor Gardens, London SW1.
The President recently received a letter from Mr. J. Ernest Franck (F) who is the sole surviving Founder Member of the Concrete Institute, which, formed in 1908, became the Institution of Structural Engineers in 1923. Mr. Franck who now lives in retirement in Suffolk is 95 years of age. The President feels that the letter, a resume of which is given below, is not only of fascinating interest to contemporary members but is a tribute to the memory of a distinguished engineer.
This paper describes problems that were encountered, and solutions that were obtained, during the design and construction of foundations for a multi-storey building sited over the Mersey Tunnel in Liverpool. To ensure that the weight of the structure would not adversely affect the rock surrounding the tunnel, theoretical analyses were made to estimate existing stresses: and experiments on photo-elastic models were made to assess imposed stresses. The results showed that major loads would have to be transmitted to either side of the tunnel by air space foundations consisting of floating beams supported on end-bearing piles. A description is given of the piles and the tests which were made to develop frictionless linings. Two floating beams and a floating slab are discussed in terms of analysis by finite element techniques: and their construction in post-tensioned concrete is discussed with special reference to mix design, types of shuttering: and concreting methods. D.M. Bingham and A.J.M. Soane