This European Standard covers membranes, individual substructure components, substructure kits and suspended ceiling kits intended to be placed on the market. It covers suspended ceilings sold as a complete kit, substructures placed on the market as kits, individual components (products) of such substructures, and membrane components. It includes test methods and methods of assessment, as well as provisions for the marking and for the evaluation of conformity of the products to the requirements of this European Standard. In the absence of any other European Standard, this European Standard specifies dimensions, tolerances and, where relevant, performance requirements, for commonly available ceiling substructures and membrane components. The body responsible for this standard is NA 005-09-80 AA "Abgehängte Decken (SpA zu CEN/TC 277)" ("Suspended ceilings (national mirror committee for CEN/TC 277)") at DIN.