SIST EN 13373:2020
(Main)Natural stone test methods - Determination of geometric characteristics on units
Natural stone test methods - Determination of geometric characteristics on units
This document describes methods for verifying the geometric characteristics of products of natural stone such as rough blocks, rough slabs, finished products for cladding, flooring, stairs and modular tiles and paving units (slabs, setts and kerbs). These methods can be applied in the case of a dispute between two parties, they are not compulsory for production control.
Other measuring equipment can be used as long as their precision can be demonstrated to be equal or better than the ones mentioned here.
It is essential that all weighing, measuring and testing equipment are calibrated or retraceable to measurement standards and regularly inspected according to documented procedures, frequencies and criteria. It is important that the expression of the dimensional characteristics is in accordance with the appropriate class of the measured product.
Prüfverfahren für Naturstein - Bestimmung geometrischer Merkmale von Gesteinen
Dieses Dokument beschreibt Verfahren für die Prüfung der Maße und anderer geometrischer Merkmale von Naturwerksteinen, wie Rohblöcke, Rohplatten und Fertigerzeugnisse für Wandbekleidungen, Bodenbeläge, Treppen und Fliesen sowie Pflasterplatten (Platten, Pflastersteine und Bordsteine). Diese Verfahren können im Streitfall zwischen zwei Parteien angewendet werden; sie sind nicht für die Fertigungsprüfung vorgeschrieben.
Es können andere Messvorrichtungen verwendet werden, sofern nachgewiesen werden kann, dass diese mindestens ebenso präzise sind wie die hier genannten Verfahren.
Es ist wichtig, dass sämtliche Wiege-, Mess- und Prüfausrüstungen kalibriert und entsprechend den dokumentierten Verfahren, Häufigkeiten und Kriterien regelmäßig überprüft werden. Es ist wichtig, dass die Angabe der Maßeigenschaften in Übereinstimmung mit der entsprechenden Klasse des gemessenen Produkts erfolgt.
Méthodes d’essai pour pierres naturelles - Détermination des dimensions et autres caractéristiques géométriques
La présente Norme européenne décrit les méthodes de vérification des caractéristiques géométriques des produits en pierre naturelle, tels que les blocs bruts, les tranches brutes et les produits finis pour les revêtements muraux, de sols, d’escaliers et les plaquettes modulaires et les unités de pavage (tranches, pavés et bordures). Ces méthodes s’appliquent en cas de litige entre deux parties, elles ne sont pas obligatoires pour le contrôle de la production.
D’autres équipements de mesure peuvent être utilisés s’il peut être démontré que leur précision est supérieure ou égale à celle des équipements mentionnés ici.
Tous les équipements de pesée, de mesure et d’essai doivent être étalonnés ou raccordables à des étalons de mesure et être régulièrement inspectés selon des procédures, des fréquences et des critères documentés. L’expression des caractéristiques dimensionnelles doit être en conformité avec la classe appropriée du produit mesuré.
Preskušanje naravnega kamna - Ugotavljanje geometričnih lastnosti proizvodov
Ta dokument opisuje metode za preverjanje geometričnih lastnosti proizvodov iz naravnega kamna, kot so grobi bloki, grobe plošče, končni proizvodi za oblaganje, tla, stopnice in modularne ploščice ter tlakovci (plošče, kocke in robniki). Te metode je mogoče uporabiti v primeru spora med dvema strankama, niso pa obvezne pri nadzoru proizvodnje. Uporabiti je mogoče tudi drugo merilno opremo, če se izkaže, da je njena natančnost enaka ali boljša od zgoraj omenjene. Bistveno je, da je vsa tehtalna, merilna in preskusna oprema umerjena ali sledljiva z merilnimi standardi ter redno pregledana v skladu z dokumentiranimi postopki, pogostostjo in merili. Pomembno je, da je izražanje dimenzijskih značilnosti v skladu z ustreznim razredom merjenega proizvoda.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 13373:2020
01-marec-2020
Nadomešča:
SIST EN 13373:2003
Preskušanje naravnega kamna - Ugotavljanje geometričnih lastnosti proizvodov
Natural stone test methods - Determination of geometric characteristics on units
Prüfverfahren für Naturstein - Bestimmung geometrischer Merkmale von Gesteinen
Méthodes d’essai pour pierres naturelles - Détermination des dimensions et autres
caractéristiques géométriques
Ta slovenski standard je istoveten z: EN 13373:2020
ICS:
73.020 Rudarstvo in kamnolomsko Mining and quarrying
izkopavanje
91.100.15 Mineralni materiali in izdelki Mineral materials and
products
SIST EN 13373:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 13373:2020
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SIST EN 13373:2020
EN 13373
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2020
EUROPÄISCHE NORM
ICS 91.100.15 Supersedes EN 13373:2003
English Version
Natural stone test methods - Determination of geometric
characteristics on units
Méthodes d'essai pour pierres naturelles - Prüfverfahren für Naturstein - Bestimmung
Détermination des dimensions et autres geometrischer Merkmale von Gesteinen
caractéristiques géométriques
This European Standard was approved by CEN on 15 April 2019.
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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13373:2020 E
worldwide for CEN national Members.
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SIST EN 13373:2020
EN 13373:2020 (E)
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Measurement of the dimensions of squared rough blocks . 5
4.1 Measurement of the gross dimensions of squared rough blocks . 5
4.1.1 Principle . 5
4.1.2 Apparatus . 5
4.1.3 Measurement procedure . 5
4.1.4 Expression of the results . 6
4.2 Measurement of net dimensions of rough blocks . 6
4.2.1 Principle . 6
4.2.2 Apparatus . 6
4.2.3 Measurement procedure . 6
4.2.4 Expression of the results . 7
5 Measurement of the dimensions of rough slabs . 7
5.1 Measurement of the gross in-plane dimensions of rough slabs . 7
5.1.1 Principle . 7
5.1.2 Apparatus . 7
5.1.3 Measurement procedure . 8
5.1.4 Expression of the results . 8
5.2 Measurement of the net in-plane dimensions of rough slabs . 8
5.2.1 Principle . 8
5.2.2 Apparatus . 8
5.2.3 Measurement procedure . 9
5.2.4 Expression of the results . 9
5.3 Measurement of the thickness of a rough slab . 9
5.4 Measurement of the flatness of a rough slab . 9
6 Measurement of the dimensions and measurement of other geometric
characteristics of finished products with sawn edges . 10
6.1 Principle . 10
6.2 Apparatus . 10
6.3 Measurement of in-plane dimensions of finished products with sawn edges . 10
6.3.1 Measurement procedure . 10
6.3.2 Expression of the results . 11
6.4 Measurement of the thickness and surface irregularities of finished products with
sawn edges . 11
6.4.1 Measurement of the rough thickness . 11
6.4.2 Expression of the results . 12
6.4.3 Measurement of surface irregularities . 12
6.4.4 Expression of results . 14
6.4.5 Measurement of the nominal thickness . 14
6.5 Measurement of flatness . 15
6.5.1 Measurement of the flatness for a regular surface finish . 15
6.5.2 Measurement of the flatness for an irregular surface finish . 19
2
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6.6 Measurement of the straightness of arrises . 19
6.6.1 Principle . 19
6.6.2 Apparatus . 20
6.6.3 Measurement procedure . 20
6.6.4 Expression of the results . 21
6.7 Measurement of the squareness of visible faces . 21
6.7.1 Principle . 21
6.7.2 Angular measurement . 21
6.7.3 Measurement in percentage . 23
6.8 Measurement of the squareness of edges . 25
6.8.1 Principle . 25
6.8.2 Apparatus . 26
6.8.3 Measurement procedure . 26
6.8.4 Expression of the results . 28
6.9 Measurement of the shape of non-rectangular elements . 28
6.9.1 Principle . 28
6.9.2 Apparatus . 29
6.9.3 Measurement procedure . 29
7 Measurement of the dimensions and other geometric characteristics of finished
products with cleft / riven / hewn edges . 31
7.1 Measurement of dimensions . 31
7.2 Measurement of thickness and surface irregularities . 32
7.3 Measurement of undercut and overcut . 32
7.3.1 General . 32
7.3.2 Apparatus . 32
7.3.3 Measurement procedure . 32
7.3.4 Expression of the results . 33
7.4 Measurement of the flatness . 33
7.5 Measurement of the straightness . 33
7.6 Measurement of the squareness of seen face . 33
8 Measurement of the shape of non-rectangular elements . 33
9 Measurement of the geometrical characteristics of fixing holes of slabs for cladding . 34
9.1 Principle . 34
9.2 Depth of the hole . 34
9.2.1 Apparatus . 34
9.2.2 Measurement procedure . 34
9.2.3 Expression of the results . 34
9.3 Position of the hole . 35
9.3.1 Apparatus . 35
9.3.2 Measurement procedure . 35
9.3.3 Expression of the results . 35
9.4 Diameter of the hole . 35
9.4.1 Apparatus . 35
9.4.2 Measurement procedure . 35
9.4.3 Expression of the results . 35
9.5 Inclination of the hole . 35
9.5.1 Apparatus . 35
9.5.2 Measurement procedure . 35
9.5.3 Expression of the results . 36
10 Test report . 36
Bibliography . 38
3
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SIST EN 13373:2020
EN 13373:2020 (E)
European foreword
This document (EN 13373:2020) has been prepared by Technical Committee CEN/TC 246 “Natural
stones”, the secretariat of which is held by UNI.
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 July 2020, and conflicting national standards shall be
withdrawn at the latest by July 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 13373:2003.
The significant changes with respect to the previous edition are listed below:
— figures have been revised;
— editorial changes have been made.
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, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United
Kingdom.
4
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SIST EN 13373:2020
EN 13373:2020 (E)
1 Scope
This document describes methods for verifying the geometric characteristics of products of natural stone
such as rough blocks, rough slabs, finished products for cladding, flooring, stairs and modular tiles and
paving units (slabs, setts and kerbs). These methods can be applied in the case of a dispute between two
parties, they are not compulsory for production control.
Other measuring equipment can be used as long as their precision can be demonstrated to be equal or
better than the ones mentioned here.
It is essential that all weighing, measuring and testing equipment are calibrated or retraceable to
measurement standards and regularly inspected according to documented procedures, frequencies and
criteria. It is important that the expression of the dimensional characteristics is in accordance with the
appropriate class of the measured product.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
4 Measurement of the dimensions of squared rough blocks
4.1 Measurement of the gross dimensions of squared rough blocks
4.1.1 Principle
Measurement of the dimensions of the smallest rectangular cuboid with straight edges that contains a
rough block.
4.1.2 Apparatus
— A rigid ruler of appropriate length graduated in 0,01 m.
4.1.3 Measurement procedure
The gross length x , the gross width y and the gross height z of the block are measured in
gross gross gross
the following manner:
— Define the smallest cuboid that can encompass the rough block.
— Estimate by projection the gross dimensions of the block x y and z (see Figure 1).
gross, gross gross
— Take measurements expressed in metres to the nearest 0,01 m at i places (minimum 3) for each
direction x , y , z where visually the largest dimensions occur.
i i i
5
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EN 13373:2020 (E)
Figure 1 — Measurement of the gross length x (or of the gross width y ) of a face of a
gross gross
rough block
4.1.4 Expression of the results
The average gross dimension is expressed for each direction to the nearest 0,01 m.
4.2 Measurement of net dimensions of rough blocks
4.2.1 Principle
Measurement of the dimensions of the largest rectangular cuboid with straight edges that can be
inscribed within a rough block.
4.2.2 Apparatus
— A rigid ruler of appropriate size graduated in 1 mm.
4.2.3 Measurement procedure
The net length x , the net width y and the net height z of the block are measured in the following
net net net
manner:
— Define the largest cuboid that can still be inscribed within the rough block.
— Estimate and trace the net dimensions of the block x , y and z (see Figure 2).
net net net
6
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EN 13373:2020 (E)
— Take measurements expressed in metres to the nearest 0,01 m at i places (minimum 3) for each
direction x , y , z where visually the smallest dimensions occur.
i i i
Figure 2 — Measurement of the net length x (or of the net width y ) of a face of a rough
net net
block
4.2.4 Expression of the results
The average net dimension is expressed for each direction to the nearest 0,01 m.
5 Measurement of the dimensions of rough slabs
5.1 Measurement of the gross in-plane dimensions of rough slabs
5.1.1 Principle
Measurement of the dimensions of the smallest rectangle that contains a slab.
5.1.2 Apparatus
— A rigid ruler of appropriate size graduated in 0,001 m.
7
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EN 13373:2020 (E)
5.1.3 Measurement procedure
The gross length x and the gross width z of the slab are measured in the following manner:
gross gross
— Define the smallest rectangle that can encompass the rough slab.
— Estimate by projection the gross dimensions of the slab x and z (see Figure 3).
gross gross
— Take measurements expressed in metres to the nearest 0,01 m at i places (minimum 3) for each
direction x and z where visually the largest dimensions occur.
i i
Figure 3 — Measurement of the gross length x and gross width z of a rough slab
gross gross
5.1.4 Expression of the results
The average gross dimension is expressed for each direction to the nearest 0,01 m.
5.2 Measurement of the net in-plane dimensions of rough slabs
5.2.1 Principle
Measurement of the dimensions of the largest rectangle that can be inscribed within a slab.
5.2.2 Apparatus
— A rigid ruler of appropriate size graduated in 0,001 m.
8
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EN 13373:2020 (E)
5.2.3 Measurement procedure
— The net length x and the net height z of the slab are measured in the following manner:
net net
— Define the largest rectangle that can still be inscribed within the rough slab.
— Estimate and trace the net dimensions of the slab x and z (see Figure 4).
net net
— Take measurements expressed in metres to the nearest 0,01 m at i places (minimum 3) for each
direction x and z where visually the smallest dimensions occur.
i i
Figure 4 — Measurement of the net length X and the net width Z of a rough slab
net net
5.2.4 Expression of the results
The average net dimension is expressed for each direction to the nearest 0,01 m.
5.3 Measurement of the thickness of a rough slab
See 6.4 (Measurement of the thickness and surface irregularities of finished products with sawn edges)
or 7.2 (Measurement of thickness and surface irregularities).
5.4 Measurement of the flatness of a rough slab
See 6.5.
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EN 13373:2020 (E)
6 Measurement of the dimensions and measurement of other geometric
characteristics of finished products with sawn edges
6.1 Principle
Measurement of the length, width and other dimension of rectangular elements with sawn edges.
6.2 Apparatus
— A measurement device with a measuring range of at least the largest dimension of the measured
element and with the precision given by Table 1.
Table 1 — Measurement precision of the device
Tolerance on the dimension being measured Measuring precision
mm
mm
< 1 0,1
≥ 1 and < 5 0,1
≥ 5 0,5
If the tolerance class of the dimension being measured is not known then the measuring precision of the
device shall be not more than 0,1 mm.
6.3 Measurement of in-plane dimensions of finished products with sawn edges
6.3.1 Measurement procedure
All the measurements shall be recorded according to Table 1. For the length and width, measurements
per visible face are taken according to Figure 5 and the following requirements:
— At least 1 measurement at the centre if dimension ≤ 70 mm
— At least 2 measurements (at 1/3 and 2/3) if dimension > 70 mm and ≤ 600 mm
— At least 3 measurements (see Figure 5) if dimension > 600 mm
10
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Dimensions in millimetres
Key
1 measuring device as described in 6.2
L length of the element
Figure 5 — Measurement of the length of finished products at 3 points (for L > 600 mm)
6.3.2 Expression of the results
The average dimension is expressed for each direction at 1 mm.
6.4 Measurement of the thickness and surface irregularities of finished products with
sawn edges
6.4.1 Measurement of the rough thickness
All the measurements shall be recorded according to Table 1. For each side, the thickness is measured
according to Figure 6 and the following requirements:
— At least 1 measurement at the centre if dimension ≤ 120 mm
— At least 2 measurements (at 1/3 and 2/3) if dimension > 120 and ≤ 600 mm
— At least 3 measurements (see Figure 6) if dimension > 600 mm
11
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SIST EN 13373:2020
EN 13373:2020 (E)
Dimensions in millimetres
Key
L length of the element (>600 mm in this example)
W width of the element (≤120 mm in this example)
Figure 6 — Measurement of the thickness of finished products at 1 point (for W ≤ 120 mm) and 3
points (for L > 600 mm)
6.4.2 Expression of the results
The average thickness is expressed for each direction at 0,1 mm.
6.4.3 Measurement of surface irregularities
6.4.3.1 Principle
Measurement of surface irregularities for products with a textured surface finish (flame-textured, bush-
hammered, etc. and a sawn rear face). For products with a sawn surface finish or similar, measurement
of surface irregularities is not required.
12
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6.4.3.2 Apparatus
— A profile gauge (‘comb’) of appropriate size.
— A rigid ruler of appropriate size graduated in millimetres.
One or more suitable measuring devices satisfying the precision requirements of the measurements as
given in Table 2.
Table 2 — Precision of the measurements
Tolerance on the measured dimension Maximum measuring error
mm mm
< 1 0,1
1 0,2
> 1 0,5
If the tolerance class of the dimension being measured is not known then the maximum measuring error
of the measuring device shall be not more than 0,1 mm.
The device used for measuring the thickness of webs and shells shall have a jaw of at least 10 mm in
length.
6.4.3.3 Measurement procedure
Place the element to be measured on a reference surface. The textured surface is to be parallel to the
reference surface. If necessary, use appropriate wedge and verify with spirit level.
— Place the profile gauge support onto the spacing shims and press the fingers on the base.
— Measure the distance (measurement e) between the end of the blade and the gauge support to the
nearest 1 mm (see Figure 7).
— Place the profile on paper and record the gaps in the profile gauge.
For each direction, the surface irregularities are taken as follows:
— At least 1 measurement at the centre if the dimension ≤ 120 mm
— At least 2 measurements (at 1/3 and 2/3) if the dimension > 120
and ≤ 600 mm
— At least 3 measurements (see Figure 5) if the dimension > 600 mm
— Place the gauge on one of these areas and press all the blades on to the surface (see Figure 7).
— Remove the gauge and measure the difference between the highest and lowest points.
— Repeat the operation for the other direction.
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SIST EN 13373:2020
EN 13373:2020 (E)
Key
1 profile g
...
SLOVENSKI STANDARD
oSIST prEN 13373:2018
01-oktober-2018
3UHVNXãDQMHQDUDYQHJDNDPQD8JRWDYOMDQMHJHRPHWULþQLKODVWQRVWLSURL]YRGRY
Natural stone test methods - Determination of geometric characteristics on units
Prüfverfahren für Naturstein - Bestimmung geometrischer Merkmale von Gesteinen
Méthodes d’essai pour pierres naturelles - Détermination des dimensions et autres
caractéristiques géométriques
Ta slovenski standard je istoveten z: prEN 13373
ICS:
73.020 Rudarstvo in kamnolomsko Mining and quarrying
izkopavanje
91.100.15 Mineralni materiali in izdelki Mineral materials and
products
oSIST prEN 13373:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 13373:2018
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oSIST prEN 13373:2018
DRAFT
EUROPEAN STANDARD
prEN 13373
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2018
ICS 91.100.15 Will supersede EN 13373:2003
English Version
Natural stone test methods - Determination of geometric
characteristics on units
Méthodes d'essai pour pierres naturelles - Prüfverfahren für Naturstein - Bestimmung
Détermination des dimensions et autres geometrischer Merkmale von Gesteinen
caractéristiques géométriques
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 246.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13373:2018 E
worldwide for CEN national Members.
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oSIST prEN 13373:2018
prEN 13373:2018 (E)
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Measurement of the dimensions of squared rough blocks . 5
4.1 Measurement of the gross dimensions of squared rough blocks . 5
4.1.1 Principle . 5
4.1.2 Apparatus . 5
4.1.3 Measurement procedure . 5
4.1.4 Expression of the results . 6
4.2 Measurement of net dimensions of rough blocks . 6
4.2.1 Principle . 6
4.2.2 Apparatus . 6
4.2.3 Measurement procedure . 6
4.2.4 Expression of the results . 7
5 Measurement of the dimensions of rough slabs . 7
5.1 Measurement of the gross in-plane dimensions of rough slabs . 7
5.1.1 Principle . 7
5.1.2 Apparatus . 7
5.1.3 Measurement procedure . 7
5.1.4 Expression of the results . 8
5.2 Measurement of the net in-plane dimensions of rough slabs . 8
5.2.1 Principle . 8
5.2.2 Apparatus . 8
5.2.3 Measurement procedure . 8
5.2.4 Expression of the results . 8
5.3 Measurement of the thickness of a rough slab . 9
5.4 Measurement of the flatness of a rough slab . 9
6 Measurement of the dimensions and measurement of other geometric
characteristics of finished products with sawn edges . 9
6.1 Principle . 9
6.2 Apparatus . 9
6.3 Measurement of in-plane dimensions of finished products with sawn edges . 9
6.3.1 Measurement procedure . 9
6.3.2 Expression of the results . 10
6.4 Measurement of the thickness and surface irregularities of finished products with
sawn edges . 10
6.4.1 Measurement of the rough thickness . 10
6.4.2 Expression of the results . 11
6.4.3 Measurement of surface irregularities . 11
6.4.4 Expression of results . 13
6.4.5 Measurement of the nominal thickness . 13
6.5 Measurement of flatness . 13
6.5.1 Measurement of the flatness for a regular surface finish . 13
6.5.2 Measurement of the flatness for an irregular surface finish . 15
6.6 Measurement of the straightness of arrises . 15
2
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prEN 13373:2018 (E)
6.6.1 Principle . 15
6.6.2 Apparatus . 15
6.6.3 Measurement procedure . 16
6.6.4 Expression of the results . 16
6.7 Measurement of the squareness of visible faces . 17
6.7.1 Principle . 17
6.7.2 Angular measurement . 17
6.7.3 Measurement in percentage . 17
6.8 Measurement of the squareness of edges . 19
6.8.1 Principle . 19
6.8.2 Apparatus . 19
6.8.3 Measurement procedure . 19
6.8.4 Expression of the results . 22
6.9 Measurement of the shape of non-rectangular elements . 22
6.9.1 Principle . 22
6.9.2 Apparatus . 22
6.9.3 Measurement procedure . 22
7 Measurement of the dimensions and other geometric characteristics of finished
products with cleft / riven/ hewn edges . 24
7.1 Measurement of dimensions . 24
7.2 Measurement of thickness and surface irregularities . 24
7.3 Measurement of undercut and overcut . 25
7.3.1 General . 25
7.3.2 Apparatus . 25
7.3.3 Measurement procedure . 25
7.3.4 Expression of the results . 25
7.4 Measurement of the flatness . 25
7.5 Measurement of the straightness . 25
7.6 Measurement of the squareness of seen face . 25
8 Measurement of the shape of non-rectangular elements . 26
9 Measurement of the geometrical characteristics of fixing holes of slabs for cladding . 26
9.1 Principle . 26
9.2 Depth of the hole . 26
9.2.1 Apparatus . 26
9.2.2 Measurement procedure . 26
9.2.3 Expression of the results . 26
9.3 Position of the hole . 26
9.3.1 Apparatus . 26
9.3.2 Measurement procedure . 26
9.3.3 Expression of the results . 27
9.4 Diameter of the hole . 27
9.4.1 Apparatus . 27
9.4.2 Measurement procedure . 27
9.4.3 Expression of the results . 27
9.5 Inclination of the hole . 27
9.5.1 Apparatus . 27
9.5.2 Measurement procedure . 27
9.5.3 Expression of the results . 28
10 Test report . 28
Bibliography . 30
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European foreword
This document (prEN 13373:2018) has been prepared by Technical Committee CEN/TC 246 “Natural
stones”, the secretariat of which is held by UNI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 13373:2003.
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1 Scope
This document describes methods for verifying the geometric characteristics of products of natural
stone such as rough blocks, rough slabs, finished products for cladding, flooring, stairs and modular tiles
and paving units (slabs, setts and kerbs). These methods can be applied in the case of a dispute between
two parties, they are not compulsory for production control.
Other measuring equipment can be used as long as their precision can be demonstrated to be equal or
better than the ones mentioned here.
It is essential that all weighing, measuring and testing equipment are calibrated or retraceable to
measurement standards and regularly inspected according to documented procedures, frequencies and
criteria. It is important that the expression of the dimensional characteristics is in accordance with the
appropriate class of the measured product.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 Measurement of the dimensions of squared rough blocks
4.1 Measurement of the gross dimensions of squared rough blocks
4.1.1 Principle
Measurement of the dimensions of the smallest rectangular cuboid with straight edges that contains a
rough block.
4.1.2 Apparatus
— A rigid ruler of appropriate length graduated in 0,01 m.
4.1.3 Measurement procedure
The gross length xgross, the gross width ygross and the gross height zgross of the block are measured in
the following manner:
— Define the smallest cuboid that can encompass the rough block.
— Estimate by projection the gross dimensions of the block xgross, ygross and zgross (see Figure 1).
— Take measurements expressed in metres to the nearest 0,01 m at i places (minimum 3) for each
direction xi, yi, zi where visually the largest dimensions occur.
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Key
B X or Y
i i
C X or Y
Figure 1 — Measurement of the gross length xgross (or of the gross width ygross) of a face of a
rough block
4.1.4 Expression of the results
The average gross dimension is expressed for each direction to the nearest 0,01 m.
4.2 Measurement of net dimensions of rough blocks
4.2.1 Principle
Measurement of the dimensions of the largest rectangular cuboid with straight edges (P ) that can be
2
inscribed within a rough block.
4.2.2 Apparatus
— A rigid ruler of appropriate size graduated in 1 mm.
4.2.3 Measurement procedure
The net length x , the net width y and the net height z of the block are measured in the
net net net
following manner:
— Define the largest cuboid that can still be inscribed within the rough block.
— Estimate and trace the net dimensions of the block x , y and z (see Figure 2).
net net net
— Take measurements expressed in metres to the nearest 0,01 m at i places (minimum 3) for each
direction x , y , z where visually the smallest dimensions occur.
i i i
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Key
A X or Y
i i
B X or Y
Figure 2 — Measurement of the net length xnet (or of the net width ynet) of a face of a rough
block
4.2.4 Expression of the results
The average net dimension is expressed for each direction to the nearest 0,01 m.
5 Measurement of the dimensions of rough slabs
5.1 Measurement of the gross in-plane dimensions of rough slabs
5.1.1 Principle
Measurement of the dimensions of the smallest rectangle that contains a slab.
5.1.2 Apparatus
— A rigid ruler of appropriate size graduated in 0,001 m.
5.1.3 Measurement procedure
The gross length x and the gross width z of the slab are measured in the following manner:
gross gross
— Define the smallest rectangle that can encompass the rough slab.
— Estimate by projection the gross dimensions of the slab x and z (see Figure 3).
gross gross
— Take measurements expressed in metres to the nearest 0,01 m at i places (minimum 3) for each
direction x and z where visually the largest dimensions occur.
i i
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Figure 3 — Measurement of the gross length xgross and gross width zgross of a rough slab
5.1.4 Expression of the results
The average gross dimension is expressed for each direction to the nearest 0,01 m.
5.2 Measurement of the net in-plane dimensions of rough slabs
5.2.1 Principle
Measurement of the dimensions of the largest rectangle that can be inscribed within a slab.
5.2.2 Apparatus
— A rigid ruler of appropriate size graduated in 0,001 m.
5.2.3 Measurement procedure
— The net length X and the net height Z the slab are measured in the following manner:
net net of
— Define the largest rectangle that can still be inscribed within the rough slab.
— Estimate and trace the net dimensions of the slab X and Z (see Figure 4).
net net
— Take measurements expressed in metres to the nearest 0,01 m at i places (minimum 3) for each
direction x and z where visually the smallest dimensions occur.
i i
Figure 4 — Measurement of the net length Xnet and the net width Znet of a rough slab
5.2.4 Expression of the results
The average net dimension is expressed for each direction to the nearest 0,01 m.
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5.3 Measurement of the thickness of a rough slab
See 6.4 (sawn slab) or 7.2 (riven/ hewn slab).
5.4 Measurement of the flatness of a rough slab
See 6.5.
6 Measurement of the dimensions and measurement of other geometric
characteristics of finished products with sawn edges
6.1 Principle
Measurement of the length, width and other dimension of rectangular elements with sawn edges.
6.2 Apparatus
— A measurement device with a measuring range of at least the largest dimension of the measured
element and with the precision given by Table 1.
Table 1 — Measurement precision of the device
Tolerance on the dimension being measured Measuring precision
mm
mm
< 1 0,1
≥ 1 and < 5 0,1
≥ 5 0,5
If the tolerance class of the dimension being measured is not known then the measuring precision of the
device shall be not more than 0,5 mm.
6.3 Measurement of in-plane dimensions of finished products with sawn edges
6.3.1 Measurement procedure
All the measurements shall be recorded according to Table 1. For the length and width, measurements
per visible face are taken according to Figure 5 and the following requirements:
— At least 1 measurement at the centre if dimension ≤ 70 mm
— At least 2 measurements (at 1/3 and 2/3) if dimension > 70 mm and ≤ 600 mm
— At least 3 measurements (see Figure 5) if dimension > 600 mm
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Dimensions in millimetres
Key
1 measuring device as described in 6.4.3.2
L length of the element
Figure 5 — Measurement of the length of finished products at 3 points (for L > 600 mm)
6.3.2 Expression of the results
The average dimension is expressed for each direction at 1 mm.
6.4 Measurement of the thickness and surface irregularities of finished products with
sawn edges
6.4.1 Measurement of the rough thickness
All the measurements shall be recorded according to Table 1. For each side, the thickness is measured
according to Figure 6 and the following requirements:
— At least 1 measurement at the centre if dimension ≤ 120 mm
— At least 2 measurements (at 1/3 and 2/3) if dimension > 120 and ≤ 600 mm
— At least 3 measurements (see Figure 6) if dimension > 600 mm
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Dimensions in millimetres
Key
L length of the element (> 600 mm in this example)
W width of the element (< 120 mm in this example)
Figure 6 — Measurement of the thickness of finished products at 1 point (for W > 120 mm) and 3
points (for L > 600 mm)
6.4.2 Expression of the results
The average thickness is expressed for each direction at 0,1 mm.
6.4.3 Measurement of surface irregularities
6.4.3.1 Principle
Measurement of surface irregularities for products with a textured surface finish (flame-textured, bush-
hammered etc. and a sawn rear face). For products with a sawn surface finish or similar, measurement
of surface irregularities is not required.
6.4.3.2 Apparatus
— A profile gauge (‘comb’) of appropriate size.
— A rigid ruler of appropriate size graduated in millimetres.
One or more suitable measuring devices satisfying the precision requirements of the measurements as
given in Table 2.
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Table 2 — Precision of the measurements
Tolerance on the measured dimension Maximum measuring error
mm mm
< 1 0,1
1 0,2
> 1 0,5
If the tolerance class of the dimension being measured is not known then the maximum measuring
error of the measuring device shall be not more than 0,1 mm.
The device used for measuring the thickness of webs and shells shall have a jaw of at least 10 mm in
length.
6.4.3.3 Measurement procedure
Place the element to be measured on a reference surface. The textured surface is to be parallel to the
reference surface. If necessary, use appropriate wedge and verify with spirit level.
— Place the profile gauge support onto the spacing shims and press the fingers on the base.
— Measure the distance (measurement e) between the end of the blade and the gauge support to the
nearest 1 mm (see Figure 7).
— Place the profile on paper and record the gaps in the profile gauge.
For each direction, the surface irregularities are taken as follows:
— At least 1 measurement at the centre if the dimension ≤ 120 mm
— At least 2 measurements (at 1/3 and 2/3) if the dimension > 120 and ≤ 600 mm
— At least 3 measurements (see Figure 5) if the dimension > 600 mm
— Place the gauge on one of these areas and press all the blades on to the surface (see Figure 7).
— Remove the gauge and measure the difference between the highest and lowest points.
— Repeat the operation for the other directions.
Key
1 profile gauge
2 element being measured
Figure 7 — Measurement of surface irregularities
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6.4.4 Expression of results
The maximum surface irregularity is expressed to the nearest 1 mm.
6.4.5 Measurement of the nominal thickness
— The average rough measurement of the thickness of the element is taken according to the method
described in 6.4.1.
— The nominal thickness is calculated by subtracting the maximum depth of hollows, obtained with
the profile gauge according to 6.4.3, from the average rough thickness.
— For sawn surfaces, the nominal thickness is taken to be equal to the rough thickness.
6.5 Measurement of flatness
6.5.1 Measurement of the flatness for a regular surface finish
6.5.1.1 Principle
Measurement of the deviation from flatness for elements with sawn edges and having a sawn, honed or
po
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