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The Structural Engineer, Volume 60, Issue 5, 1982
Mr S. Thorburn (F) (Thorburn & Partners): When I initially perused the analytical paper' by Professor MacLeod, 1 thought that he was trying to convert an art into a science, but that would be a rather unfair impression to give. When a problem defies analytical prediction we excuse ourselves by treating it as an art. The word 'art' needs to be defined. Art really means judgment, and judgment demands a real understanding of structures. That is the basis of sound judgment. The more case histories we have-good case histories-with adequate definitions of the ground and structure, the better our judgment. I do not think you can predict adequately the differential settlement of a structure, whereas you can, within reasonable limits, predict the total movement-as has been demonstrated by many of the buildings that we have investigated.
Loadbearing walls-fire resistance In February of this year we published a letter from Mr A. R. Bundy, drawing our attention to the fact that different Codes of Practice lay down varying requirements for the amount of reinforcement. Mr John Davis now writes: I would refer Mr Bundy to the discussions at the Jubilee Conference of the Institution’s Midland Counties Branch ‘Structural design for fire resistance’, September 1975. Verulam
When timber trussed rafters were first introduced in the UK some 16 years ago, they were constructed to span tables produced by the Princes Risborough Laboratory from a programme of tests on prototype units. The resulting roof constructions, as well as using the materials efficiently, have been shown by time to be satisfactory in service. Phillip O'Reece