EN 771-4:2011+A1:2015

European foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Materials and manufacture
5 Requirements for AAC masonry units
6 Description, designation and classification of
  AAC masonry units
7 Marking
8 Assessment and verification of constancy
  of performance (AVCP)
Annex A (normative) - Sampling for product type determination
        test and for independent
        testing of consignments
Annex B (normative) - Cutting schemes
Annex C (informative) - Guidance on FPC frequencies
Annex ZA (informative) - Clauses of this European Standard
         addressing the provisions of the EU Construction
         Products Regulation
Bibliography

This European Standard specifies the characteristics and performance requirements of autoclaved aerated concrete (AAC) masonry units for which the main intended uses are different types of load bearing and non-load bearing applications in all forms of walling including single leaf, cavity, partitions, retaining, basement and general use below ground level, including walling for fire protection, thermal insulation, sound insulation and the fabric of chimneys (excluding chimney flue units).This European Standard includes AAC masonry units with an incorporated insulation not exposed to fire, and masonry units of an overall rectangular parallelepiped shape, specially shaped and accessory units. AAC masonry units may consist of layers of different densities where not all of the layers are loadbearing.It provides for the assessment and verification of constancy of performance (AVCP) of the product to this European Standard.The marking requirement for products covered by this European Standard is included.This European Standard does not cover the requirements for storey height panels, flue linings and masonry units with an incorporated thermal insulation material bonded to the faces of the unit susceptible to be exposed to fire. It does not specify standard sizes for autoclaved aerated concrete units nor standard work dimensions and angles of specially shaped and accessory units. It does not give permissible deviations for specially shaped and accessory units. It does not cover products intended for use as a damp proof course or the lining of a chimney.