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Dr. D. Tordoff (BCSA): We are all conscious of the fact that changes are taking place in design specifications and I should like to ask Mr Needham to comment on the changing philosophy of connection design with the introduction of limit state principles. Will a different design approach be required, and is there any research needed, or being undertaken currently, for a new design approach?
Though the steel portal frame is one of the simplest structural arrangements for covering a given area, the designer probably has to satisfy at least as many different structural criteria as for more complex structures. Present-day design of portal frames is reviewed in the light of recent research studies into certain aspects of the behaviour of portal frames, particularly the problem of stability of haunched rafters. Guidance is given for checking the lateral stability of such members. L.J. Morris
When a house or some other form of property changes hands, the buyer usually commissions a survey of it; or, if a mortgage is negotiated, the Building Society will give instructions for a surveyor to establish value. Whoever undertakes a survey is legally responsible for what is said in the report to the client.