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Mr. D. G. ,Alcock (Associate-Member) writes:- ‘The authors claim to present a unified approach for the determination of the degrees of freedom or indeterminacy of plane and space frames. In fact the claim is rather ambitious as it can only yield the degree of indeterminacy of a structure which is already known to be stable.'
The paper describes tests on twenty-seven Lytag concrete columns. Sixteen of the columns were reinforced with varying percentages of square twisted steel and the remaining eleven were unreinforced. It was found that, although the ultimate loads of reinforced Lytag concrete columns are slightly less than those of equivalent gravel concrete columns, the load factors are satisfactory. It is therefore safe to design reinforced Lytag concrete columns with the permissible stresses specified in CP l14 (1957). C.O. Orangun
Text of a letter from the President of the Institution, Mr. D.A.G. Reid, CBE and the Chairman of the Council of Engineering Institutions, Sir Robert Wynne-Edwards, dated l2 May 1966: ‘Dear Minister, For some months past the Council of this Institution, together with the Chairman and some members of the Council of Engineering Institutions, have been giving anxious consideration to matters associated with the building of the new County Hall for the County of Bedford. You will, we are sure, be familiar with the case.'