EN 771-3:2003 Specification for masonry units - Part 3: Aggregate concrete masonry units (Dense and light-weight aggregates) Incorporates Amendment A1: 2005
This European Standard specifies the characteristics and performance requirements of aggregate
concrete masonry units made from dense and lightweight aggregates or a combination of both for which
the main intended uses are common, facing or exposed masonry in load bearing or non load bearing
building and civil engineering applications. The units are suitable for all forms of walling, including single
leaf, external leaf to chimneys, cavity wall, partitions, retaining, and basement. They can provide fire
protection, thermal insulation, sound insulation and sound absorption.
This European Standard includes concrete masonry units of an overall non rectangular parallelepiped
shape, especially shaped and accessory units.
It defines the performance related to e.g. strength, density, dimensional accuracy, and provides for the
evaluation of conformity of the product to this European Standard. The marking requirements for products
covered by this European Standard is also included.
This European Standard does not specify standard sizes for aggregate concrete masonry units, nor
standard work dimensions and angles of specially shaped aggregate concrete masonry units. It does not
cover storey height panels, chimney flue linings nor units intended for use as a damp proof course. It
does not cover units with an incorporated thermal insulation material bonded to the faces of the unit
susceptible to be exposed to fire.
EN 771-3:2003 history
2015EN 771-3:2011+A1:2015 Specification for masonry units - Part 3: Aggregate concrete masonry units (Dense and lightweight aggregates)
2011EN 771-3:2011 Specification for masonry units - Part 3: Aggregate concrete masonry units (Dense and lightweight aggregates)
2003EN 771-3:2003 Specification for masonry units - Part 3: Aggregate concrete masonry units (Dense and light-weight aggregates) Incorporates Amendment A1: 2005