Are old high aluminia cement concrete (HACC) roof structures still a problem?

Most of us are aware of the various ways of resolving disputes (e.g. negotiation, mediation, adjudication, arbitration, litigation). Adjudication has grown in popularity in recent years; it involves the use of a third party (the adjudicator) who finds out the details of a dispute and decides what should be a fair settlement, in the light of the contract. Unlike litigation (and to some extent arbitration) there is normally no set procedure to be followed. A.L. Gilbertson

Factors of safety in Codes Alasdair Bed, from Leeds, has returned to the fray and writes: Colin Taylor’s invitation (Verulam, 16 September) to a game of pingpong with him and Alan Weller is tempting (if we could find a suitably shaped table!), but the correspondence on the derivation of the BS 5950 safety factors had a rather more serious purpose.

The PFF's revised Code of practice for the safe erection of precast flooring has been written to help everyone involved in designing, planning, using or erecting these products to understand the practicalities. P.A. Harris