This European Standard applies to prefabricated walls@ made of normal weight or lightweight concrete with dense structure. Also fibre reinforced concrete (steel@ polymer or other fibres covered by European Standards) may be used. These wall elements may have external wall functions (see 3.11) or not@ have facing functions (see 3.12) or not or have a combination of these functions. External wall functions could be: -thermal insulation (see 3.11.1); -sound insulation (see 3.11.2); -hygrometric control (see 3.11.3); or a combination of these. They may be plain@ reinforced or prestressed. They may be loadbearing or not. These include: -solid walls; -composite walls; -sandwich walls; -lightened walls; -claddings. The wall element may also work as a column or beam.