SIST EN 13373:2020

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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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
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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
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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.
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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 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
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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
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— 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.
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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.
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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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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
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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
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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.
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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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Key
1 profile g
...