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Mr. Kerensky introduced the members of the panel:-
Mr. Stott, Director of Highways and Transportation of the Greater London Council, Mr. Summerfield, a Past President of the Institution of Highway Engineers and the County Surveyor of Oxfordshire, Mr. Cox, Director now in charge of the London Traffic Survey being carried out jointly by British and American firms of consulting engineers, who had taken part in many other transportation surveys in the USA and elsewhere, and Mr. Best, a consulting engineer, who would deal especially with the structural traffic solutions.
The first speaker, speaking on behalf of Mr. C. Blumfield (Member), said that Mr. Blumfield was unwell and had asked for his appreciation of the very excellent paper to
be conveyed to Mr. Creasy. Mr. Blumfield had had much experience with composite construction and had some difficulty in reconciling the comparative costs of cladding
as quoted by Mr. Creasy. Would it be possible for Mr. Creasy to give the unit costs of the concrete, shuttering, etc.?
Tests were carried out to deterrmne if roof sheeting acted in conjunction with a rafter to form a tee-beam effect. The results showed that the stress m the sheeting was far less than would be reached in a true compound sectlon and appeared to depend more on the number of fastening bolts than on the actual width of sheeting used. Although the moment contribution of the sheeting in the experimental tee-beam was as great as 25 per cent of the applied moment, it 1s shown that in a real design the effect would be negligible.
E.R. Bryan and B.J. Sloper