First published: N/A
Standard: £9 + VAT
An IStructE account gives you access to a world of knowledge. Create a profile to receive details of our unique range of resources, events and training.
Added to basket
Professor N. Simons: Being a foundation engineer I obviously found a great deal of interest in the paper. but I would like to discuss one point in particular this evening and this is this philosophy of the design of a piled raft about which the authors have written. Considering raft foundations in the London clay, which are also piled, in many cases the piles are provided solely to reduce settlement. In other words, if there were no piles whatsoever, there would be a perfectly adequate factor of safety against failure. So when such piles are installed only to reduce settlement then obviously the design concept must be considered. The point I wish to make is; should the piles be designed to carry the total building weight, or is it necessary only to carry the net increase in loading on the piles?
Mr. D.R.R. Dick (F) (Past-President) : I think the authors are to be congratulated on their very interesting paper, particularly those parts where they relate their practical experience to future actions.
This technical note deals with properties of chains of equilateral spherical triangles constructed on the surface of a sphere. The properties discussed in the paper seem not to have been noticed by any one before. The division of a sphere into icosihedral and tetrahedral divisions are shown to be only particular cases of these chains of equilateral spherical triangles. Structural engineers can make use of these properties
to divide spherical and cylindrical surfaces into reasonably small areas with identical arcs (or chords) and hence construct braced domes and vaults with identical members.
K.S. Rangasami and S.M.R. Kaburu