EN 771-3:2011
(Main)Specification for masonry units - Part 3: Aggregate concrete masonry units (Dense and lightweight aggregates)
General Information
- Abstract
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 aggregate 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 are 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.
- Status
- Withdrawn
- Publication Date
- 03-May-2011
- Withdrawal Date
- 16-Sep-2026
- Technical Committee
- CEN/TC 125 - Masonry
- Drafting Committee
- CEN/TC 125/WG 1 - Masonry units
- Current Stage
- 9960 - Withdrawal effective - Withdrawal
- Start Date
- 19-Aug-2015
- Completion Date
- 17-Sep-2026
- Directive
- Harmonized Standard305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eecOJ Ref: C, C 259 OJ Date: 08-Aug-2014
Not Harmonized89/106/EEC - Construction productsOJ Ref: C, C 246 OJ Date: 24-Aug-2011
Relations
- Effective Date
- 08-Jun-2022
- Effective Date
- 07-May-2011
- Effective Date
- 08-Jun-2022
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Refers
EN 772-1:2011 - Methods of test for masonry units - Part 1: Determination of compressive strength - Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Refers
EN 1052-3:2002 - Methods of test for masonry - Part 3: Determination of initial shear strength - Effective Date
- 28-Jan-2026
- Effective Date
- 06-Jun-2012
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Frequently Asked Questions
EN 771-3:2011 is a standard published by the European Committee for Standardization (CEN). Its full title is "Specification for masonry units - Part 3: Aggregate concrete masonry units (Dense and lightweight aggregates)". This standard covers: 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 aggregate 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 are 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.
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 aggregate 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 are 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 771-3:2011 is classified under the following ICS (International Classification for Standards) categories: 91.100.30 - Concrete and concrete products. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 771-3:2011 has the following relationships with other standards: It is inter standard links to EN 771-3:2003, EN 771-3:2003/A1:2005, EN 771-3:2011+A1:2015, EN 1745:2020, EN 13501-1:2018, EN 1052-2:2016, EN 772-11:2011, EN 772-1:2011, EN ISO 12572:2016, EN 772-16:2011, EN 772-2:1998, EN 1052-3:2002, EN 771-3:2011/FprA1. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 771-3:2011 is associated with the following European legislation: EU Directives/Regulations: 305/2011, 89/106/EEC; Standardization Mandates: M/116. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
EN 771-3:2011 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Specifikacija za zidake - 3. del: Betonski zidaki (kompaktni in lahki agregati)Festlegungen für Mauersteine - Teil 3: Mauersteine aus Beton (mit dichten und porigen Zuschlägen)Spécifications pour éléments de maçonnerie - Partie 3 : Éléments de maçonnerie en béton de granulats (granulats courants et légers)Specification for masonry units - Part 3: Aggregate concrete masonry units (Dense and lightweight aggregates)91.100.30Beton in betonski izdelkiConcrete and concrete productsICS:Ta slovenski standard je istoveten z:EN 771-3:2011SIST EN 771-3:2011en,fr,de01-julij-2011SIST EN 771-3:2011SLOVENSKI
STANDARDSIST EN 771-3:2004/A1:2005SIST EN 771-3:20041DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 771-3
May 2011 ICS 91.100.30 Supersedes EN 771-3:2003English Version
Specification for masonry units - Part 3: Aggregate concrete masonry units (Dense and lightweight aggregates)
Spécifications pour éléments de maçonnerie - Partie 3: Éléments de maçonnerie en béton de granulats (granulats courants et légers)
Festlegungen für Mauersteine - Teil 3: Mauersteine aus Beton (mit dichten und porigen Zuschlägen) This European Standard was approved by CEN on 10 March 2011.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 771-3:2011: ESIST EN 771-3:2011
Sampling for initial type testing and for independent testing of consignments . 20A.1General . 20A.2Sampling procedure . 20A.2.1General . 20A.2.2Random sampling . 20A.2.3Representative sampling . 20A.2.4Dividing the sample . 21A.2.5Number of units required for testing . 21A.3Place and dates of inspection and testing . 22Annex B (normative)
Compliance criteria for initial type testing and for independent testing of consignments . 23B.1Dimensions and tolerances (see 5.2) . 23B.2Configuration and appearance (see 5.3) . 23B.3Density (see 5.4) . 23B.4Mechanical strength (see 5.5) . 23B.4.1Characteristic strength . 23B.4.2Mean strength . 23B.5Moisture movement and water absorption by capillarity (see 5.9 and 5.8) . 23Annex C (informative)
Examples of different shapes of aggregate concrete masonry units . 27Annex D (informative)
Guidance for test
frequencies for designing a FPC system to demonstrate conformity of finished products with the requirements of the standard and the declaration of the manufacturer . 28Annex ZA (informative)
Clauses of this European Standard addressing the provisions of the EU Construction Products Directive . 30ZA.1Scope and relevant characteristics . 30ZA.2Procedure(s) for attestation of conformity of aggregate concrete masonry units . 32ZA.2.1System(s) of attestation of conformity . 32ZA.2.2EC Certificate and Declaration of Conformity . 33ZA.3CE marking and labelling. 34Bibliography . 38
EN 771, Specification for masonry units consists of: − Part 1: Clay masonry units − Part 2: Calcium silicate masonry units − Part 3: Aggregate concrete masonry units (Dense and light weight aggregates) − Part 4: Autoclaved aerated concrete masonry units − Part 5: Manufactured stone masonry units − Part 6: Natural stone masonry units According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
EXAMPLE Mortar pocket, rendering keyway, grooves to provide a discontinuity in the mortar joint, grip hole. 3.1.16 shell peripheral solid material between the hole(s) and the face or the header of a unit 3.1.17 web solid material between the formed voids in a masonry unit 3.1.18 declared value value that a manufacturer is confident of achieving, bearing in mind the precision of the test and the variability of the manufacturing process 3.1.19 Category I masonry units units with a declared compressive strength with a probability of failure to reach it not exceeding 5 % NOTE This may be determined via the mean or characteristic value. 3.1.20 Category II masonry units units not intended to comply with the level of confidence of Category I units 3.1.21 normalized compressive strength of masonry units compressive strength of masonry units converted to the air dry compressive strength of an equivalent 100 mm wide × 100 mm high masonry unit NOTE See the procedure given in EN 772-1. 3.1.22 mean compressive strength of masonry units arithmetic mean of the compressive strengths of masonry units SIST EN 771-3:2011
length, in mm ld
length of the diagonal, in mm w
width, in mm h
height, in mm fb
normalized compressive strength, in N/mm2 fc
characteristic compressive strength, in N/mm2 fm
mean compressive strength, in N/mm2 fbi
individual result compressive strength, in N/mm2 λ10,dry,unit thermal conductivity of a masonry unit in a dry state at an average temperature of 10 °C 4 Materials The specifications of the materials to be used shall be included in the production control documentation (see 8.3). If appropriate European Standards are available, they shall be used except that aggregates need not comply with grading requirements. If not available, the manufacturer shall specify the materials and have data on their suitability. SIST EN 771-3:2011
Key 1 Length 3 Height 5 Face 2 Width 4 Bed 6 Header
NOTE 2 This relates to the normal use of the masonry unit in the wall. Figure 1 — Dimensions and surfaces SIST EN 771-3:2011
Tolerances for non-regular shaped and accessory units shall be as given in Table 1 or as declared by the manufacturer. These tolerances shall not apply to the dimensions between the surfaces of units which are manufactured to be non planar. If sampled in accordance with A.2 and tested in accordance with EN 772-16:2011 (method a)), the results evaluated in accordance with B.1 shall conform to the declared tolerance category. 5.2.2.2 Flatness of bed faces When aggregate concrete masonry units are declared as tolerance category D4 for use with thin layer mortar, the manufacturer shall also declare the maximum deviation from flatness of the bed faces. If sampled in accordance with A.2 and tested in accordance with EN 772-20, the deviation from flatness of the bed faces shall not exceed the declared value. 5.2.2.3 Plane parallelism of bed faces When aggregate concrete masonry units are declared as tolerance category D4 for use with thin layer mortar, the manufacturer shall also declare the maximum deviation from plane parallelism of the bed faces. If sampled in accordance with A.2 and tested in accordance with EN 772-16:2011 (method d)), the deviation from plane parallelism of the bed faces shall not exceed the declared value. 5.3 Configuration and appearance 5.3.1 Configuration When relevant to the uses for which aggregate concrete masonry units are put on the market, the configuration shall be declared. The declaration may be made by reference to one or another of the groups defined in EN 1996-1-1 and/or it may include one or more items such as those in the following list, as relevant: SIST EN 771-3:2011
factory production control (see 8.3). Alternative methods of test to the reference methods specified in this European Standard may be adopted except for the initial type tests and in case of dispute, provided that these alternative methods satisfy the following: a) a correlation can be shown to exist between the results from the reference method and those from the alternative method; or b) a safe relationship can be demonstrated when using the alternative method compared to the reference methods and c) the information on which the relationship is based is available. 8.2 Initial type testing After completion of the development of a new product type and before offering for sale, appropriate initial type tests shall be carried out to confirm that the properties predicted from the development meet the requirements of this standard and the values to be declared for the product. SIST EN 771-3:2011
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