(1) for units intended to be used in elements subject to structural requirements. (2 ) for units intended to be used in elements subject to fire requirements. This Guide to BS EN has been prepared to assist anyone involved in the design, specification and ordering of aggregate concrete blocks to understand. Buy BS EN SPECIFICATION FOR MASONRY UNITS – PART 3: AGGREGATE CONCRETE MASONRY UNITS (DENSE AND.
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These can be used in common, facing or exposed masonry in load bearing or non load bearing building and civil engineering applications, they are suitable for all forms of walling, such as single leaf, external 771-3 to chimneys, cavity wall, partitions, retaining, and basement.
It will replace BS in April after a month period of co-existence. This is a harmonized European Standard and fully takes into account the requirements of the European Commission mandate M, Masonry and related products. Your basket is empty.
Understanding BS EN 771-3: Aggregate concrete masonry units
The standard also requires net dry density to be given when it is relevant to the application. Learn more about the cookies we use and how to change your settings. Aggregate concrete masonry units Dense and light-weight aggregates AMD No longer current but cited in Building Regulations guidance.
Aggregate concrete masonry units Dense and lightweight aggregates is a new harmonized Standard for aggregate concrete bricks and blocks. There is also a requirement for the parallelism of bed faces of units to be used with thin layer mortar in conjunction with the D4 tolerance category.
Background BS EN Aggregate concrete masonry units is written as a performance standard which means that all requirements are based on the finished product, rather than prescriptive standards which limit the materials that can be used in manufacture.
Aggregate concrete masonry units. Tolerance D4 is intended solely for blocks to be laid with thin joint mortar, a technique rarely used in the UK. Specification for masonry units. Closer tolerances on any dimension may also be declared by the manufacturer for any tolerance category. The CBA publish data sheets and technical guidance on many typical block applications. Group 3 and 4 units are not commonly manufactured for use in the UK.
The check is to be seen as a qualification test and need only be repeated in the case of principal changes to the design dimensions of units.
Their committees work with the manufacturing and service industries, government, businesses and consumers to facilitate the production of British, European and International standards.
BS EN 771-3:2003
BS EN also categorizes units according to void percentages as follows: Supersedes BS EN Aggregate concrete masonry units Important guidance for specifiers and users on a new Standard for aggregate concrete blocks Introduction BS EN For facing units there is an optional but strongly recommended procedure for the site approval of the appearance of unit prior to their use. Performance testing, Bricks, Dimensional measurement, Conformity, Acoustic absorption, Thermal resistance, Quality control, Density, Lightweight aggregates, Sound insulation, Cladding buildingsHeavyweight aggregates, Walls, Strength of materials, Masonry work, Thermal insulation, Concretes, Construction materials, Aggregates, Brickwork, Fire safety, Blocks buildingConstruction systems parts, Marking, Construction engineering works, Performance, Dimensional tolerances.
Take the smart route to manage medical device compliance. These are slightly higher than strengths determined to BS Again there may be more recent versions of the document.
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Understanding BS EN Aggregate concrete masonry units
The Amber document status indicator indicates that some caution is needed when using this document – it is either: March Replaced By: Intended to assist anyone involved in the design, specification and ordering of aggregate concrete blocks to understand the changes made in the latest standard and thereby continue to make the specification and procurement of aggregate concrete blocks as straightforward as possible. Aggregate concrete masonry units dense and light-weight aggregates.
The test method for dimensions is BS EN Again there may be more recent versions of the document. This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. The net dry density is rarely likely to be a necessity in practice.
Aggregate concrete masonry units dense and light-weight aggregates Status: Please download Chrome or Firefox or view our browser tips. Requirements and test methods BS You may experience issues viewing this site in Internet Explorer 9, 10 or The compressive strength will need 77-3 be declared air dry. This document Older versions. The manufacturer will declare whether a unit is category I or category II. Search all products by.
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Cellular and hollow blocks will, depending on void content, will be described as Group 1 or 2 units. A category I unit would be approximately equivalent to special category as defined in BS and would require third party certification and monitoring of the production control system. There is no doubt that over a period of 24 years BS has served our industry well in developing concise and unambiguous specifications for aggregate concrete bricks and blocks used in far ranging applications.
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