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ONORM EN 771-4:2011
Specification for masonry units - Part 4: Autoclaved aerated concrete masonry units (Austrian Standard)
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).
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Austrian Standards Institute [on]