BS EN 771-3:2011+A1:2015 PDF Download

BS EN 771-3:2011+A1:2015 is a European standard that specifies the characteristics and performance requirements of aggregate concrete masonry units made from dense and lightweight aggregates or a combination of both. These units are primarily used in load-bearing or non-load-bearing masonry applications, such as common, facing, or exposed masonry in buildings and civil engineering structures.

This standard covers a wide range of applications, including single-leaf walls, cavity walls, partitions, retaining walls, and basements. The aggregate concrete masonry units can provide various functional features, such as fire protection, thermal insulation, sound insulation, and sound absorption.

The standard includes not only regular rectangular units but also specially shaped and accessory units. It defines performance-related criteria like strength, density, and dimensional accuracy. Additionally, it provides guidelines for the assessment and verification of the product's constancy of performance (AVCP). The standard also addresses the marking requirements for products covered under its scope.

However, there are certain limitations to this standard. It does not specify standard sizes for the aggregate concrete masonry units, nor does it define standard work dimensions and angles for specially shaped units. It also does not cover storey height panels, chimney flue linings, units intended for use as a damp proof course, or units with incorporated thermal insulation materials that are susceptible to fire exposure.