Author: Murray, N W
First published: N/A
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Murray, N W
This paper discusses in summary form the forthcoming changes in National Insurance as particularly affecting the self-employed, but including those with other occupations as well. It is written to provide a quick resume of the position as it is known, which can be assimilated at one reading. It aims to provide an awareness so that those affected can see what further action is required and what further areas need to be studied. It must be emphasized, however, that it is not prepared as a substitute for official publications, nor for the Statutes.
The interest in improving fire escape facilities continues unabated and tends to centre on the helter-skelter solution. We may have treated this somewhat light-heartedly in the January issue: not because we found it risible, but because it is pleasant to think that a concept normally associated with children's pleasure may solve a horrifying hazard.
A plastic method of analysis is applied to determine the collapse load for double layered flat reticular grids. Two grid types are considered, namely orthogonal and diagonal systems. The plastic analysis is performed by rotational considerations as conventionally applied to concrete slabs and from individual member deformations. The collapse load is also determined from a generalized computer displacement analysis that permits member yield and where necessary incorporates post buckling behaviour of individual members. The collapse load factors obtained from the different analyses
J.F. Dickie and D.J. Dunn