The Structural Engineer > Archive > Volume 50 (1972) > Issues > Issue 3 > Discussion Structural Brickwork - Materials and Performance by K. Thomas
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Discussion Structural Brickwork - Materials and Performance by K. Thomas

Mr. J. H. H. Williams(F) : Mr. Thomas has mentioned the importance of wall ties in cavity construction, but he did not mention the question of durability. It is my concern that we should not build into structures members which may become dangerous in sixty or even one hundred years' time because of the failure of some small but vital part which cannot easily be seen by future surveyors. Wall ties in cavity walls fall into the category of a humble but essential part contributing to the stability of large panels of masonry and as they cannot easily be inspected I believe that they should be designed for a period well in excess of the anticipated life of the building. Some engineers and authorities insist that non-ferrous or stainless steel ties are used in cavity walls in high rise structures, while others, less informed, may be misled by the compliance of galvanized wire ties with the British Standard.