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Mr M. K. Hurst (M) I was very interested to read of the application of post-tensioned slabs to a major building in the UK, never having really understood why the method has lacked popularity there. It is a routine form of construction in Australia, the USA, the Far East, and South Africa, where its economy has been recognised for many years. I have just completed the design of a building in Botswana, using slab post-tensioning technology from South Africa. In that building the slab was 200 mm thick with a column spacing of 6.3 m in each direction. This was a cheaper solution than the alternative in reinforced concrete.
Disputes in the construction industry abound, and there are a number of procedures to resolve them as an alternative to arbitration and litigation. The best known form of alternative dispute resolution (ADR) is mediation which is attracting interest as a real alternative to more traditional methods. It has been widely used since the early 1980s in the USA where it originated. It involves using a third party as mediator, acceptable to the disputants between whom mutual understanding to resolve the dispute is not possible. A. Jawad
Members will, no doubt, be aware of the proposed introduction of the Construction (Design & Management) Regulations (CDM), to have become effective originally on 1 January 1994 but which have now been postponed so that they will come into force on 1 October 1994, following a 3 month ‘lead in’ period. S.G. Evans and J.M. Roberts