EN 846-14:2012

Methods of test for ancillary components for masonry - Part 14: Determination of the initial shear strength between the prefabricated part of a composite lintel and the masonry above it

This European Standard specifies a method for determining the in plane initial shear strength of the
horizontal bed joint between the prefabricated part of a composite lintel and the masonry above it,
using a specimen tested in shear. Guidance is given on the preparation of the specimens, the conditioning required before testing, the testing machine, the method of test, the method of calculation and the contents of the test report. The method corresponds with the method described in EN 1052-3:2003+A1:2006. Guidance is given where the method deviates from EN 1052-3. Therefore, each section of EN 1052-3 is repeated given the necessary changes.

Prüfverfahren für Ergänzungsbauteile für Mauerwerk - Teil 14: Bestimmung der Anfangsscherfestigkeit des Verbunds zwischen dem vorgefertigten Teil eines teilweise vorgefertigten, bauseits ergänzten Sturzes und dem über dem Sturz befindlichen Mauerwerk

Diese Europäische Norm legt ein Verfahren zur Bestimmung der Anfangsscherfestigkeit in der Ebene der horizontalen Lagerfuge zwischen dem vorgefertigten Teil eines teilweise vorgefertigten, bauseits ergänzten Sturzes und dem über dem Sturz befindlichen Mauerwerk unter Verwendung eines auf Schub beanspruchten Probekörpers fest.
Es werden Hinweise zur Herstellung der Probekörper, zur vor der Prüfung erforderlichen Konditionierung, zur Prüfmaschine, zum Prüfverfahren, zum Berechnungsverfahren und zum Inhalt des Prüfberichtes gegeben.
Das Verfahren entspricht dem in EN 1052 3:2003 + A1:2006 beschriebenen Verfahren. Es wird eine Anleitung zu den Punkten gegeben, in denen das Verfahren von EN 1052 3 abweicht. Deshalb wird jeder Abschnitt von EN 1052 3 mit den notwendigen Änderungen wiederholt.

Méthodes d'essai des composants accessoires de maçonnerie - Partie 14: Détermination de la résistance initiale au cisaillement entre la partie préfabriquée d'un linteau composite et de la maçonnerie placée au-dessus

La présente Norme européenne décrit une méthode permettant de déterminer la résistance initiale au cisaillement en plan du joint horizontal entre la partie préfabriquée d'un linteau composite et la maçonnerie placée au-dessus, en utilisant une éprouvette soumise à l'essai de cisaillement.
Elle comprend des recommandations sur la préparation des éprouvettes, le conditionnement requis avant les essais, la machine d'essai, la méthode d'essai, la méthode de calcul et le contenu du rapport d'essai.
La méthode correspond à celle décrite dans l'EN 1052-3:2003+A1:2006. Des recommandations sont données lorsque la méthode s'écarte de celle de l'EN 1052-3. Chaque section de l'EN 1052-3 est donc répétée en incorporant les modifications nécessaires.

Metode preskušanja dodatnih komponent zidovine - 14. del: Ugotavljanje začetne strižne trdnosti med vnaprej izdelanim delom kompozitne preklade in zidavo nad njo

Ta evropski standard določa metodo za ugotavljanje začetne strižne trdnosti v ravnini za vodoravno ležišče med vnaprej izdelanim delom kompozitne preklade in zidavo nad njo z uporabo vzorca, preskušenega v strižni povezavi. Podana so navodila o pripravi vzorcev, pogojih, ki morajo biti izpolnjeni pred preskušanjem, stroju za preskušanje, metodi preskusa, metodi izračuna in vsebini poročila o preskusu. Metoda ustreza tisti, ki je opisana v standardu EN 1052-3:2003+A1:2006. Podana so tudi navodila za dele, kjer metoda odstopa od standarda EN 1052-3. Glede na potrebne spremembe so zato ponovljeni vsi razdelki standarda EN 1052-3.

General Information

• Status: Published
• Publication Date: 11-Sep-2012
• ICS: 91.080.30 - Masonry
• Technical Committee: CEN/TC 125 - Masonry
• Drafting Committee: CEN/TC 125/WG 4 - Test methods
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 23-Jan-2025
• Completion Date: 14-Apr-2025
• Ref Project: SIST EN 846-14:2012 - Methods of test for ancillary components for masonry - Part 14: Determination of the initial shear strength between the prefabricated part of a composite lintel and the masonry above it

Overview - EN 846-14:2012 (CEN)

EN 846-14:2012 is a CEN test-method standard for determining the initial in‑plane shear strength of the horizontal bed joint between the prefabricated part of a composite lintel and the masonry above it. The standard describes specimen preparation, conditioning, test apparatus, loading procedures, calculation methods and test report content. The method aligns with EN 1052-3:2003+A1:2006, with specific guidance where it deviates.

Key topics and technical requirements

• Scope and principle
  • Measures initial shear strength of the bed joint using small specimens tested in shear under four‑point loading.
  • Defines valid failure modes and two test procedures:
    • Procedure A - tests at different precompressions and derives shear strength by linear regression to zero prestress.
    • Procedure B - tests at zero precompression; characteristic values obtained by simple or statistical methods.
• Specimen types and dimensions
  • Type I and Type II specimen geometries are specified depending on unit height and length (e.g., pieces of prefabricated lintel paired with a masonry unit).
  • Typical bed joint thickness guidance: 8–15 mm for conventional mortar joints or 1–3 mm for thin‑layer mortar.
• Materials and conditioning
  • Requirements for masonry units, mortar (reference EN 998‑2) and conditioning procedures; moisture and compressive strength tests referenced (EN 772 series).
• Testing apparatus and accuracy
  • Testing machine requirements include adequate capacity and controlled loading rate; recommended accuracy: repeatability ~2%, mean error ±2%, zero‑force error ~0.4% of range.
  • Measurement of specimen cross‑section to 1% accuracy.
• Calculations, evaluation and reporting
  • Methods for computing individual and characteristic shear strength values, statistical treatment, and required contents for the test report.

Applications - who uses EN 846-14

• Manufacturers of composite lintels - product development and quality control.
• Construction product test laboratories - type testing and certification.
• Structural and masonry engineers - verifying interface performance between lintel components and masonry.
• Certification bodies and regulators - demonstrating compliance with European harmonized test methods.
• Contractors and QA teams - on-site verification planning and acceptance testing specifications.

Related standards

• EN 1052-3:2003+A1:2006 (corresponding shear test method)
• EN 772-1, EN 772-10, EN 772-16 (masonry unit tests)
• EN 998-2 (masonry mortar specification)
• EN 1015-3, EN 1015-7, EN 1015-11 (mortar test methods)

This standard is essential when assessing the interface bond and initial shear strength at the lintel–masonry interface to ensure safe, durable masonry openings and to support compliance and certification workflows.

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2012
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VWULåQHWUGQRVWLPHGYQDSUHML]GHODQLPGHORPNRPSR]LWQHSUHNODGHLQ]LGDYRQDG
QMR
Methods of test for ancillary components for masonry - Part 14: Determination of the
initial shear strength between the prefabricated part of a composite lintel and the
masonry above it
Prüfverfahren für Ergänzungsbauteile für Mauerwerk - Teil 14: Bestimmung der
Anfangsscherfestigkeit des Verbunds zwischen dem vorgefertigten Teil eines teilweise
vorgefertigten, bauseits ergänzten Sturzes und dem über dem Sturz befindlichen
Mauerwerk
Méthodes d'essai des composants accessoires de maçonnerie - Partie 14:
Détermination de la résistance initiale au cisaillement entre la partie préfabriquée d'un
linteau composite et de la maçonnerie placée au-dessus
Ta slovenski standard je istoveten z: EN 846-14:2012
ICS:
91.080.30 Zidane konstrukcije Masonry
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 846-14
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2012
ICS 91.080.30
English Version
Methods of test for ancillary components for masonry - Part 14:
Determination of the initial shear strength between the
prefabricated part of a composite lintel and the masonry above it
Méthodes d'essai des composants accessoires de Prüfverfahren für Ergänzungsbauteile für Mauerwerk - Teil
maçonnerie - Partie 14: Détermination de la résistance 14: Bestimmung der Anfangsscherfestigkeit des Verbunds
initiale au cisaillement entre la partie préfabriquée d'un zwischen dem vorgefertigten Teil eines teilweise
linteau composite et de la maçonnerie placée au-dessus vorgefertigten, bauseits ergänzten Sturzes und dem über
dem Sturz befindlichen Mauerwerk
This European Standard was approved by CEN on 11 February 2012.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 846-14:2012: E
worldwide for CEN national Members.

Contents Page
Foreword . 3
1 Scope. 4
2 Normative references . 4
3 Principle . 4
4 Terms, definitions and symbols . 5
4.1 Terms and definitions . 5
4.2 Symbols . 5
5 Materials . 6
5.1 Masonry units . 6
5.1.1 Conditioning of the units . 6
5.1.2 Testing. 6
5.2 Mortar . 6
5.3 Prefabricated part of the composite lintel . 6
6 Apparatus . 6
7 Preparation and curing of specimens . 7
7.1 Preparation of masonry specimen . 7
7.2 Curing and conditioning of the specimens . 8
8 Procedure . 8
8.1 Placing the specimens in the testing machine . 8
8.2 Loading . 10
8.2.1 Procedure A . 10
8.2.2 Procedure B . 10
8.2.3 Loading rate . 10
8.3 Measurements and observations . 11
8.4 Replications . 11
9 Calculations . 11
10 Evaluation of results . 12
10.1 Procedure A . 12
10.2 Procedure B . 12
10.2.1 General . 12
10.2.2 Simple method . 12
10.2.3 Statistical method . 13
11 Test report . 14
Annex A (informative) Types of failure . 15
Bibliography . 17

Foreword
This document (EN 846-14:2012) has been prepared by Technical Committee CEN/TC 125
“Masonry”, the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by March 2013, and conflicting national standards shall
be withdrawn at the latest by March 2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such
patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of
Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland, Turkey and the United Kingdom.

1 Scope
This European Standard specifies a method for determining the in plane initial shear strength of the
horizontal bed joint between the prefabricated part of a composite lintel and the masonry above it,
using a specimen tested in shear.
Guidance is given on the preparation of the specimens, the conditioning required before testing, the
testing machine, the method of test, the method of calculation and the contents of the test report.
The method corresponds with the method described in EN 1052-3:2003+A1:2006. Guidance is given
where the method deviates from EN 1052-3. Therefore, each section of EN 1052-3 is repeated given
the necessary changes.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 772-1, Methods of test for masonry units — Part 1: Determination of compressive strength
EN 772-10, Methods of test for masonry units — Part 10: Determination of moisture content of calcium
silicate and autoclaved aerated concrete units
EN 772-16, Methods of test for masonry units — Part 16: Determination of dimensions
EN 998-2, Specification for mortar for masonry — Part 2: Masonry mortar
EN 1015-3, Methods of test for mortar for masonry — Part 3: Determination of consistence of fresh
mortars (by flow table)
EN 1015-7, Methods of test for mortar for masonry — Part 7: Determination of air content of fresh mortar
EN 1015-11, Methods of test for mortar for masonry — Part 11: Determination of flexural and
compressive strength of hardened mortar
3 Principle
The initial shear strength of the horizontal bed joint between the prefabricated part of a composite lintel
and the masonry above it is derived from the strength of small specimens tested to destruction. The
specimens are tested in shear under four-point load.
Four different failure modes are considered to give valid results.
Two procedures, A and B are included. Procedure A involves testing specimens at different
precompressions and the initial shear strength is defined by a linear regression curve to zero
prestress. Procedure B involves testing specimens at zero precompression and determining a
characteristic initial shear strength from a simple or a statistical consideration of the results.
4 Terms, definitions and symbols
4.1 Terms and definitions
For the purpose of this European Standard, the following terms and definitions apply.
4.1.1
masonry
assemblage of masonry units laid in a specified pattern and jointed together with mortar
4.1.2
shear strength of masonry
strength of masonry subjected to shear forces
4.2 Symbols
A is the gross cross-sectional area of a specimen parallel to the bed joints, in mm

i
E distance between centre lines of the mortar bed and the loading roller, in mm
f
is the shear strength of an individual sample, in N/mm

v0i
f
is the precompressive stress of an individual sample, in N/mm

pi
f is the mean initial shear strength, in N/mm

v0
f is the characteristic initial shear strength, in N/mm

vk0,cl
F is the representation of the force applied to the specimen, in N
F is the maximum shear load, in N

i,max
F is the precompressive force, in N

pi
and h
h are the heights of cut units, in mm

1 2
h is the height of the units according to EN 772-16, in mm

u
h
is the height of the part of the prefabricated composite lintel according to EN 772-16, in mm

ppcl
k is a function of n given in Table 3
l is the length of specimen, in mm

s
l is the length of the units according to EN 772-16, in mm

u
n is the number of samples
s is the standard deviation of the n log values
t is the thickness of the bed joint, in mm

bj
t is the thickness of the steel loading plates, in mm

s
Y is log of the initial shear strength, f

10 v0
Y is the characteristic value of the log of the individual samples
c 10
Y is log of the shear strength of the individual samples

i 10
Y is the mean of the log of the shear strength of the individual samples
mean
5 Materi
...