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The Structural Engineer, Volume 44, Issue 9, 1966
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 Institution welcomes as its President for the Session 1966-67 Dr. D.D. Matthews, who takes office on 6 October. Denis Dearman Matthews was born in 1912. His grandfather, Henry Matthews, President of the National Federation of Building Trades Employers 1924, was a leading Manchester builder and founder of the firm of H. Matthews & Sons, of which the President’s present firm of Matthews & Mumby was originally a subsidiary. His father, Walter Matthews, who in 1938 was a Vice-President of the then Institute of. Builders, succeeded as head of the firm and besides being prominent in the industrial field was a strong supporter of technical education and training.
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