The standard SIA 269/4 is going to be part of the general package of the maintenance standards for existing structures. Fundamental technical and scientific basics which are adjusted to structures will be worked out. The objective is to elaborate a consistent and practical standard in the area of composite steel and concrete structures, which is compatible to the structural standard SIA 264.

The new standard should extend and complete this existing code. In addition to this SIA 269/4 should distinguish herself by efficiency, shortness and been practical.

The standard is going to be elaborated in close cooperation with the working groups of SIA 269/2 (maintenance of concrete structures) and SIA 269/3 (maintenance of steel structures) with the scope to eliminate the known deficiencies in the maintenance of composite steel and concrete structures, so that standard rules which allow a competent and commensurate planning of the maintenance are at the disposal of the engineers.