BRE IP4/81 PDF

Based on the laboratory measurements of the thickness of zinc on some 150 wall ties removed from 80 buildings owned by the Property Services Agency and local authorities, typical lives are deduced for galvanised wall ties conforming to the minimum standards of BS 1243:1978. It is concluded that more durable ties are required for new construction but that the majority of existing buildings are sufficiently robust for wide-spread problems to be unlikely.