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Dr P. A. Jackson (F) (Gifford & Partners) Having been responsible for the assessment, testing and analysis of a number of similar bridges, I was very interested in this paper. I have a few comments and would like to hear the authors’ views.
As members with sufficiently long memories will recall, the Government’s proposals for ‘Approved Persons’ were extensively debated 12 years ago; procedures for assessing candidates and maintaining a register were formulated jointly with the Institution of Civil Engineers and, at that time, it was hoped that there would be rapid progress towards final approval by Government. The underlying assumption (which still applies) was that ‘Approved Inspectors’ (AIS), when appointed, had to approve all Building Regulations, whereas ‘Approved Persons’ (APs) would specifically address structural requirements. While they therefore had to understand the Building Regulations sufficiently to know the context within which structural adequacy was determined, there was no need fully to understand (or indeed be responsible for) other aspects of the Regulations. Stefan B. Tietz
A happy New Year to you all! The Christmas holiday has proved inspirational to a number qf readers... Deflection of portals Mr D. H. Camilleri has written from Malta and is concerned about the vertical deflection of portal frames. He writes: I have often wondered regarding the validity of the ridge deflection dRE quoted in section 11.5 of Manual for the design of steelwork building structures given as: dRE = dE X cot e, where dE is the horizontal deflection.