EN 772-20:2000/A1:2005

Methods of test for masonry units - Part 20: Determination of flatness of faces of masonry units

2020-01-20: Originator of XML version: NEN (on behalf of NEN, ASI, DS, SFS, SIS, SN)

Prüfverfahren für Mauersteine - Teil 20: Bestimmung der Ebenheit von Mauersteinen

Die Worte "aus Beton, Betonwerksteinen und Natursteinen" sind zu streichen.

Méthodes d'essai des éléments de maçonnerie - Partie 20 : Détermination de la planéité des éléments de maçonnerie

Supprimer " en béton de granulats, en pierre naturelle et en pierre reconstituée ".

Metode preskušanja zidakov - 20. del: Ugotavljanje ravnosti površin zidakov

General Information

• Status: Published
• Publication Date: 08-Feb-2005
• Withdrawal Date: 31-Mar-2006
• ICS: 91.100.15 - Mineral materials and products
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: CEN/TC 125 - Masonry
• Drafting Committee: CEN/TC 125/WG 4 - Test methods
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 09-Feb-2005
• Due Date: 19-Feb-2006
• Completion Date: 09-Feb-2005
• Ref Project: SIST EN 772-20:2000/A1:2005 - Methods of test for masonry units - Part 20: Determination of flatness of faces of masonry units

Relations

• Amends: EN 772-20:2000 - Methods of test for masonry units - Part 20: Determination of flatness of faces of aggregate concrete, manufactured stone and natural stone masonry units
• Effective Date: 22-Dec-2008

Overview

EN 772-20:2000/A1:2005 is a European standard developed by CEN that specifies the methods of testing for masonry units, focusing on the determination of flatness of faces of masonry units. This standard is essential for ensuring the quality and uniformity of masonry materials such as concrete blocks, bricks, and other masonry units used in construction.

The amendment A1, approved in 2004, updates the original 2000 document to refine the testing procedures and reporting requirements specifically related to the flatness measurement of masonry surfaces. Compliance with EN 772-20:2000/A1:2005 enhances construction accuracy, structural integrity, and aesthetic consistency.

Key Topics

• Scope and Application
  EN 772-20:2000/A1:2005 applies to the flatness testing of masonry unit surfaces. It excludes previous references to aggregate concrete and natural stone, focusing broadly on masonry units including manufactured concrete blocks.

• Sampling Procedures
  The standard requires a sample size of six units for testing, except for bed face flatness determination where only three units are sampled.

• Measurement Techniques
  The flatness is determined by:

  • Measuring the diagonals of the masonry unit surface with a straight edge to the nearest 0.5 mm.
  • Using a feeler gauge to measure deviations between the unit surface and the straight edge to the nearest 0.05 mm.
  • Special attention to surface shape: distinctions are made between concave, convex, or other surface configurations.

• Calculation and Expression of Results
  Flatness results are expressed with precision:

  • Mean length of diagonals to the nearest millimetre.
  • Maximum and mean deviations from flatness reported to the nearest 0.1 mm.
  • Specific reporting for bed face flatness based on largest individual maximum distances.

• Reporting Requirements
  Detailed test reports must include sampling details, measurement data per surface, concavity or convexity explanations, and any relevant remarks in accordance with the standard.

Applications

• Quality Control in Masonry Production
  Manufacturers of concrete blocks, bricks, and other masonry units use EN 772-20:2000/A1:2005 to verify that product surfaces meet stringent flatness requirements, ensuring the units are suitable for precise construction applications.

• Construction and Structural Engineering
  Flatness of masonry units directly affects mortar joint thickness and uniformity, impacting the durability and visual appeal of constructed walls and facades. This standard helps construction engineers specify and validate masonry components' dimensional tolerances.

• Compliance and Certification
  Masonry units tested according to EN 772-20 support compliance with broader European construction standards, facilitating inclusion in national standards and certified building materials databases throughout CEN member countries.

Related Standards

• EN 771 Series
  EN 772-20 links closely with parts of the EN 771 series, which specify product requirements and testing methods for different types of masonry units, such as:

  • EN 771-1: Clay masonry units
  • EN 771-2: Calcium silicate masonry units
  • EN 771-4: Concrete masonry units

• EN 772 Series
  EN 772 includes various test methods for masonry units, with Part 20 dealing specifically with flatness. Other parts cover properties like compressive strength, water absorption, and dimensional tolerances.

• CEN/CENELEC Internal Regulations
  Compliance with amendment A1 aligns with CEN and CENELEC protocols, ensuring harmonized implementation across numerous European countries including Germany, France, Italy, Spain, and the United Kingdom.

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Keywords: EN 772-20, masonry units flatness, masonry testing methods, masonry unit quality, concrete block flatness, masonry standards, European masonry regulations, CEN masonry standards, masonry unit flatness measurement, construction material testing

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2005
Metode preskušanja zidakov - 20. del: Ugotavljanje ravnosti površin zidakov
Methods of test for masonry units - Part 20: Determination of flatness of faces of
masonry units
Prüfverfahren für Mauersteine - Teil 20: Bestimmung der Ebenheit von Mauersteinen
Méthodes d'essai des éléments de maçonnerie - Partie 20 : Détermination de la planéité
des éléments de maçonnerie
Ta slovenski standard je istoveten z: EN 772-20:2000/A1:2005
ICS:
91.100.15 Mineralni materiali in izdelki Mineral materials and
products
91.100.30 Beton in betonski izdelki Concrete and concrete
products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 772-20:2000/A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2005
ICS 91.100.30
English version
Methods of test for masonry units - Part 20: Determination of
flatness of faces of masonry units
Méthodes d'essai des éléments de maçonnerie - Partie 20 : Prüfverfahren für Mauersteine - Teil 20: Bestimmung der
Détermination de la planéité des éléments de maçonnerie Ebenheit von Mauersteinen aus Beton, Betonwerksteinen
und Natursteinen
This amendment A1 modifies the European Standard EN 772-20:2000; it was approved by CEN on 29 December 2004.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this
amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references concerning such
national standards may be obtained on application to the Central Secretariat or to any CEN member.
This amendment 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 Central Secretariat has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 772-20:2000/A1:2005: E
worldwide for CEN national Members.

Contents
Page
Foreword.3
1 Modification in Title .4
2 Modification in 1 Scope.4
3 Modification in 2 Normative references .4
4 Modification in 4.1 Sampling .4
5 Modification in 5 Procedure.4
6 Modification in 6.1 Calculation of results.4
7 Modification in 6.2 Expression of results.5
8 Modification in 7 Test report.5

Foreword
This document (EN 772-20:2000/A1:2005)
...