EN 845-3:2013

SLOVENSKI STANDARD
01-oktober-2013
1DGRPHãþD
SIST EN 845-3:2004+A1:2008
Specifikacija za dodatne komponente zidovine - 3. del: Jeklene mreže za armiranje
naležnih reg
Specification for ancillary components for masonry - Part 3: Bed joint reinforcement of
steel meshwork
Festlegungen für Ergänzungsbauteile für Mauerwerk - Teil 3: Lagerfugenbewehrung aus
Stahl
Spécifications pour composants accessoires de maçonnerie - Partie 3 : Treillis
d'armature en acier pour joints horizontaux
Ta slovenski standard je istoveten z: EN 845-3:2013
ICS:
91.060.10 Stene. Predelne stene. Walls. Partitions. Facades
Fasade
91.080.30 Zidane konstrukcije Masonry
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 845-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2013
ICS 91.080.30 Supersedes EN 845-3:2003+A1:2008
English Version
Specification for ancillary components for masonry - Part 3: Bed
joint reinforcement of steel meshwork
Spécifications pour composants accessoires de Festlegungen für Ergänzungsbauteile für Mauerwerk - Teil
maçonnerie - Partie 3 : Treillis d'armature en acier pour 3: Lagerfugenbewehrung aus Stahl
joints horizontaux
This European Standard was approved by CEN on 21 March 2013.

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
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 845-3:2013: E
worldwide for CEN national Members.

Contents Page
Foreword . 4
1 Scope. 5
2 Normative references . 5
3 Terms, definitions and symbols . 6
3.1 Terms and definitions . 6
3.2 Symbols . 7
4 Materials and types of products . 8
4.1 Materials . 8
4.2 Types of products . 11
4.2.1 General . 11
4.2.2 Welded wire meshwork . 11
4.2.3 Woven wire meshwork . 11
4.2.4 Expanded metal meshwork . 12
5 Requirements . 12
5.1 General . 12
5.2 Product applications and types . 13
5.2.1 Products for structural use . 13
5.2.2 Products for non-structural use . 13
5.3 Dimensions and limit deviations . 13
5.3.1 General . 13
5.3.2 Determination of wire size. 14
5.3.3 Determination of cross-sectional area. 15
5.3.4 Determination of other dimensions . 15
5.4 Mechanical strength . 15
5.4.1 Mechanical strength of bed joint reinforcement for structural applications . 15
5.4.2 Mechanical strength of bed joint reinforcement for non-structural applications . 16
5.5 Bond strength and anchorage length . 16
5.6 Durability . 16
5.7 Dangerous substances. 17
6 Description and designation . 17
7 Marking . 18
8 Evaluation of conformity . 18
8.1 General . 18
8.2 Initial type tests . 18
8.3 Factory production control . 19
8.3.1 General . 19
8.3.2 Testing and measuring equipment . 19
8.3.3 Production equipment . 19
8.3.4 Raw materials . 19
8.3.5 Production process . 19
8.3.6 Finished product testing . 20
8.3.7 Statistical techniques . 20
8.3.8 Marking and stock control of products . 20
8.3.9 Traceability . 20
8.3.10 Nonconforming products . 20
8.4 Sampling for initial type testing and independent testing of consignments . 20
Annex A (informative) Guidance on FPC frequencies . 22
Annex ZA (informative) Clauses of this European Standard addressing the provisions of

the EU Construction Products Directive . 23
ZA.1 Scope and relevant characteristics . 23
ZA.2 Procedure(s) for the attestation of conformity of products . 24
ZA.2.1 Systems of attestation . 24
ZA.2.2 Declaration of conformity . 25
ZA.3 CE marking and labelling . 26
Bibliography . 28

Foreword
This document (EN 845-3:2013) 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 November 2013, and conflicting national standards
shall be withdrawn at the latest by November 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.
This document has been prepared under a mandate given to CEN by the European Commission and
the European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this
document.
This document supersedes EN 845-3:2003+A1:2008.
This part has been modified to take into account the comments made in the five-year review on the
2003 version. In view of their widespread use, austenitic stainless steel has been added to the
materials that may be used.
EN 845, Specification for ancillary components for masonry, consists of the following parts:
 Part 1: Wall ties, tension straps, hangers and brackets
 Part 2: Lintels
 Part 3: Bed joint reinforcement of steel meshwork
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 the requirements for masonry bed joint reinforcement for structural
use (see 5.2.1) and for non-structural use (see 5.2.2).
Where products are intended for use in cavity wall construction, this European Standard covers only
the performance of the meshwork as reinforcement in bed joints and not its performance as wall ties
across the cavity.
This European Standard is not applicable to:
a) products in the form of individual bars or rods;
b) products formed from materials other than specified grades of austenitic stainless steel, austenitic
ferritic stainless steel, zinc pre-coated steel sheet or zinc coated steel wire with or without organic
coating.
NOTE Annex ZA refers only to welded wire meshwork intended for structural use referred to in 5.2.1 as
there are no known regulated requirements for products of this family for non-structural use.
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 846-2, Methods of test for ancillary components for masonry — Part 2: Determination of bond
strength of prefabricated bed joint reinforcement in mortar joints
EN 846-3, Methods of test for ancillary components for masonry — Part 3: Determination of shear
load capacity of welds in prefabricated bed joint reinforcement
EN 10020, Definition and classification of grades of steel
EN 10088 (all parts), Stainless steels
EN 10143, Continuously hot-dip coated steel sheet and strip — Tolerances on dimensions and shape
EN 10244 (all parts), Steel wire and wire products — Non-ferrous metallic coatings on steel wire
EN 10245-1, Steel wire and wire products — Organic coatings on steel wire — Part 1: General rules
EN 10245-2, Steel wire and wire products — Organic coatings on steel wire — Part 2: PVC finished
wire
EN 10245-3, Steel wire and wire products — Organic coatings on steel wire — Part 3: PE coated wire
EN 10346, Continuously hot-dip coated steel flat products — Technical delivery conditions
EN ISO 15630 (all parts), Steel for the reinforcement and prestressing of concrete — Test methods
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
bed joint
mortar layer between the bed faces of masonry units
3.1.2
bed joint reinforcement
steel reinforcement that is prefabricated for building into a bed joint
3.1.3
bond strength
tensile load that can be resisted by a specified length of reinforcement in a masonry bed joint
3.1.4
characteristic yield strength
value of the yield strength above which 95 % of all the individual test results occur
3.1.5
cross-wires
wires which connect longitudinal wires
3.1.6
declared value
value for a product property, determined in accordance with this standard, that a manufacturer is
confident of achieving bearing in mind the variability of the manufacturing process
3.1.7
element
complete length of bed joint reinforcement either in straight cut lengths or in a roll
3.1.8
anchorage length
minimum embedment of a length of bed joint reinforcement in mortar in order to achieve the full
effectiveness of the reinforcement
3.1.9
longitudinal wire
wire placed parallel to the length of the masonry
3.1.10
meshwork
network created with welded or woven wires or as a result of expanding a strip with a series of parallel
slits
3.1.11
profile height
maximum overall height (distance between the upper and lower surfaces at right angles to the length
and width of the joint) of the embedded portion of the bed joint reinforcement
3.1.12
shear load capacity
mean value for sample of product specimens of the failure loads at the junction between two wires
loaded in the direction of the longitudinal axis in the plane of the bed joint reinforcement
3.1.13
width
overall dimension in the plane of the bed joint reinforcement measured perpendicular to the
longitudinal axis
3.1.14
wire
longitudinal cold drawn metal of any cross-sectional shape
3.1.15
wire size
diameter of a circle with an area equal to the cross-sectional area of the wire
3.2 Symbols
A is the cross-sectional area of deformed plain wire, in mm ;
c
A is the cross-sectional area of bed joint reinforcement, in mm ;
e
A is the percentage total elongation at maximum force, in %;
gt
a is the width of the bed joint reinforcement, in mm;
b is the pitch of the cross-wire, in mm;
c is the wire size of the longitudinal wires, in mm;
d is the wire size of the cross-wires, in mm;
e is the pitch of the longitudinal wires in woven wire meshwork, in mm;
f is the aperture length of the expanded metal meshwork (centre to centre), in mm;
g is the aperture width of the expanded metal meshwork (centre to centre), in mm;
l is the length of a specimen of deformed plain wire or expanded metal meshwork, in mm;
s
l is the length of an element of bed joint reinforcement as delivered by the manufacturer, in m;
m is the mass of a specimen of deformed plain wire or expanded metal meshwork, in g;
ρ is the nominal density of the material, in kg/m ;
R is the tensile strength, in N/mm ;
m
R is the yield strength, in N/mm ;
e
R is the upper yield strength, in N/mm ;
eH
R is the 0,2 % proof strength, non-proportional extension, in N/mm ;
p0,2
R is the proof strength at a total extension of 0,5 %, in N/mm ;
e0,5
t is the profile height, in mm.
4 Materials and types of products
4.1 Materials
Materials for the manufacture of bed joint reinforcement and their protective coatings shall be selected
from those given in Table 1. Within a product, stainless steel shall not be mixed with other types of steel.

Table 1 — Materials and corrosion protection systems for bed joint reinforcement
Material
a
Material Specification for body material Coating specification coating
e
reference
Organic
Mass per Mass per Thickness
coating
b c d
one side two sides per side
thickness
2 2
g/m g/m
µm µm
g
Austenitic stainless steel (molybdenum EN 10088 (all parts) — — — — R1
chrome nickel alloys)
g
Austenitic stainless steel (chrome nickel EN 10088 (all parts) — — — — R3

alloys)
f
Zinc coated steel wire EN 10244 (all parts) zinc coating 265 — — — R13
f
Zinc coated steel wire with organic EN 10244-2 zinc coating and EN 10245 60 — — min. 80
coating over all surfaces of finished organic coating:

component
− Part 1 (EN 10245-1)
mean 100 R18
− Part 2 (EN 10245-2) –
Class 2a or 2b
− Part 3 (EN 10245-3) –
Class 3
f
Zinc coated steel wire EN 10020 with EN 10244 (all parts) zinc 105 - - - R19
coating
f
Zinc coated steel wire EN 10020 with EN 10244 (all parts) zinc 60 - - - R20
coating
d
Zinc pre-coated EN 10346: - 275 - R21
steel strip or sheet zinc coated steel
f
Zinc coated steel wire with bonded epoxy EN 10020 with EN 10244-2 zinc coating 60 - - min. 80 R22
coating over all surface of finished and bonded epoxy coating according to
mean 100
component EN 10245-1, Part 1 – General rules
g
Austenitic-ferritic stainless steel EN 10088 (all parts) - - - -
R23
a
Except where specified, an appropriate grade of steel conforming to EN 10020 for zinc-coated products may be chosen.
b
Coating weight is of zinc and is given for one side for wire and post fabrication coatings.
c
Coating weight is of zinc and given for two sides for pre-galvanised sheet products. The mean one side figure will be 50 % of the two side figure but not necessarily evenly
distributed.
d
Coating thickness refers to the average thickness of metallic protective coating on any uncut surface of a product or any surface of a post-fabrication galvanised product.
e
This number is given to allow unambiguous materials specification and gives no indication of relative performance or quality.
f
On round wire before any subsequent processing.
g
Treatment of stainless steels after fabrication is necessary in relation to welds etc., in order to maintain corrosion resistance of the steel.
4.2 Types of products
4.2.1 General
Welded wire meshwork and woven wire meshwork shall be manufactured from smooth, indented or
ribbed wire, round or flattened wire, either of low carbon steel protected against corrosion or of a
corrosion resistant steel. Expanded metal meshwork shall be manufactured from strip steel of the
appropriate thickness and corrosion resistance.
4.2.2 Welded wire meshwork
The reinforcing element produced shall consist of longitudinal wires welded to cross-wires (ladder
type) or to a continuous wire diagonal (truss type).
NOTE Examples of products for structural applications are shown in Figures 1 and 2.

Figure 1 — Example of ladder type - plan and sections

Figure 2 — Example of truss type - plan
4.2.3 Woven wire meshwork
The meshwork shall be made by winding wire around longitudinal wires following a repetitive pattern.
NOTE An example of woven wire meshwork is given in Figure 3.
Figure 3 — Example of woven wire meshwork - plan and section
4.2.4 Expanded metal meshwork
The meshwork shall be made from a steel strip, slit in a pattern which, when expanded, will produce
diamond shaped meshwork.
NOTE An example of expanded metal meshwork is given in Figure 4.

Figure 4 — Example of expanded metal meshwork - plan and section
5 Requirements
5.1 General
The requirements and properties specified in this standard shall be defined in terms of the test
methods and procedures referred to in this European Standard.
NOTE The conformity criteria given in 5.2 to 5.7 inclusive relate to initial type tests (see 8.2) and, when
relevant, consignment testing (see 8.4).
For production evaluation, the conformity criteria shall be defined in the factory production control
documentation.
5.2 Product applications and types
5.2.1 Products for structural use
Bed joint reinforcement for structural applications shall be welded wire meshwork in accordance
with 4.2.2. The product shall be declared as intended for structural applications.
The minimum wire size of the longitudinal wires shall be 3,0 mm.
5.2.2 Products for non-structural use
Bed joint reinforcement for non-structural applications shall be any of the types in accordance
with 4.2.
The minimum wire size of the longitudinal wires of welded or woven wire meshwork shall be 1,25 mm.
Cross-wires for woven wire meshwork shall be wound around the longitudinal wires for at least
1,5 turns.
Expanded metal meshwork shall be fabricated from one of the two strip materials given in Table 2.
Table 2 — Properties of strip for expanded metal meshwork
Minimum thickness Minimum characteristic
Material
of strip yield strength of strip
mm N/mm
Galvanised steel according to 0,4 140
EN 10143, EN 10346
Stainless steel according to 0,3 210
EN 10088-4
5.3 Dimensions and limit deviations
5.3.1 General
The dimensions of the bed joint reinforcement as listed in Table 3 shall be declared. The limit
deviations on dimensions shall be as given in Table 3. Specimens of bed joint reinforcement, when
sampled in accordance with Clause 8 and measured in accordance with 5.3.2 or 5.3.3, shall not
deviate from the declared values by more than the limit deviations given in Table 3.
NOTE See 3.1.6 for definition of the term ‘declared value’.
Table 3 — Dimensional deviations
Dimension Limit deviations
Wire meshwork Expanded metal
length l ± 1,5 % + 5 %
- 2 %
width a ± 5 mm ± 5 mm
± 0,2 mm if t ≤ 2 mm
and
profile height t ± 0,4 mm if t > 2 mm ± 0,5 mm
wire sizes c and d ± 0,1 mm -
cross-sectional area A not applicable ± 7 %
e
pitch of wires b and e ± 3 % -
aperture sizes f and g not applicable ± 2 mm

5.3.2 Determination of wire size
The wire size shall be determined as follows:
a) Plain round wire:
Measure the diameter of each wire in a sample with a micrometer, in two directions, approximately at
right angles, to the nearest 0,01 mm. The wire size shall be the mean of the two diameters.
b) Deformed plain wire:
Cut specimens of each wire from an element so that the length is not less than 200 mm and made up
of one, or more than one, piece. The cuts shall be clean and parallel across the wire. Measure the
length l of the specimen up to the nearest 1 mm. Determine the weight of the specimen, m, up to the
s
nearest 0,01 g. Calculate the cross-sectional area, A , to two decimal places using the following
c
formula:
m
6 2
A = ⋅10 mm
c
l ⋅ρ
s
(1)
Nominal density ρ of mild steel is 7 850 kg/m ;
Nominal density ρ of stainless steel is 7 950 kg/m .
Ac
The wire size shall be obtained from 2⋅ calculated to two decimal places.
π
c) Wire with organic coating:
Use method a) or b) after removal of the organic coating from the wire.
5.3.3 Determination of cross-sectional area
Cut a specimen of expanded metal meshwork from an element so that the length is a multiple of f and
not less than 200 mm. The cuts shall be clean and parallel across the element. Measure the length l
s
of the specimen up to the nearest 1 mm. Determine the weight of the specimen m up to the nearest
0,01 g. Calculate the cross-sectional area of the specimen, A , to two decimal places using the
e
following formula:
m
6 2
A = ⋅10 mm
e
l ⋅ρ
s
(2)
Nominal density ρ of mild steel is 7 850 kg/m ;
...