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). It defines the performance related to e. g. strength, density, dimensional accuracy etc. and provides for the evaluation of conformity of the product toThis European Standard. The marking requirement for products covered byThis 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.
EN 771-4:2011 Referenced Document
EN 1052-2 Methods of test for masonry - Part 2: Determination of flexural strength*， 2016-03-01 Update
EN 1052-3 Methods of test for masonry - Part 3: Determination of initial shear strength
EN 13501-1 Fire classification of construction products and building elements - Part 1: Classification using data from reaction to fire tests*， 2018-01-01 Update
EN 1745 Masonry and masonry products - Methods for determining thermal properties*， 2012-04-01 Update
EN 680 Determination of the drying shrinkage of autoclaved aerated concrete*， 2025-05-03 Update
EN 772-16:2011 Methods of test for masonry units - Part 16: Determination of dimensions
EN 772-1:2011 Methods of test for masonry units - Part 1: Determination of compressive strength (Incorporates Amendment A1: 2015)
EN ISO 12572 Hygrothermal performance of building materials and products - Determination of water vapour transmission properties - Cup method - Amendment 1 (ISO 12572:2016/Amd 1:2024)*， 2024-10-16 Update
EN 771-4:2011 history
2015EN 771-4:2011+A1:2015 Specification for masonry units - Part 4: Autoclaved aerated concrete masonry units
2011EN 771-4:2011 Specification for masonry units - Part 4: Autoclaved aerated concrete masonry units (Incorporates Amendment A1: 2015)
2003EN 771-4:2003 Specification for masonry units Part 4: Autoclaved aerated concrete masonry units Includes amendment A1:2005
2000EN 771-4:2000 Specification for Masonry Units - Part 4: Autoclaved Aerated Concrete Masonry Units