SIST EN 13647:2021

SLOVENSKI STANDARD
SIST EN 13647:2021
01-julij-2021
Nadomešča:
SIST EN 13647:2011
Lesene talne, stenske in stropne obloge - Ugotavljanje geometrijskih lastnosti
Wood flooring and wood panelling and cladding - Determination of geometrical
characteristics
Holzfußböden und Wand- und Deckenbekleidungen aus Holz - Bestimmung
geometrischer Eigenschaftenen
Planchers en bois, lambris et bardages en bois - Détermination des caractéristiques
géométriques
Ta slovenski standard je istoveten z: EN 13647:2021
ICS:
79.080 Polizdelki iz lesa Semi-manufactures of timber
97.150 Talne obloge Floor coverings
SIST EN 13647:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 13647:2021

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SIST EN 13647:2021


EN 13647
EUROPEAN STANDARD

NORME EUROPÉENNE

April 2021
EUROPÄISCHE NORM
ICS 79.080 Supersedes EN 13647:2011
English Version

Wood flooring and wood panelling and cladding -
Determination of geometrical characteristics
Planchers en bois, lambris et bardages en bois - Holzfußböden und Wand- und Deckenbekleidungen
Détermination des caractéristiques géométriques aus Holz - Bestimmung geometrischer Eigenschaftenen
This European Standard was approved by CEN on 12 March 2021.

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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13647:2021 E
worldwide for CEN national Members.

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SIST EN 13647:2021
EN 13647:2021 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Principles . 5
4.1 General . 5
4.2 Dimensions . 5
4.3 Angles . 5
4.4 Warp . 5
4.5 Lipping . 8
5 Equipment . 9
5.1 General . 9
5.2 Equipment to measure the dimensions . 9
5.3 Equipment to measure angle values . 9
5.4 Equipment to measure warp . 10
6 Procedure. 12
6.1 Dimensions and shape . 12
6.2 Conditioning . 12
6.3 Measurement and recording . 12
6.4 Dimensions . 12
6.5 Additional dimensions, if relevant. 13
6.6 Angles . 16
6.7 Warp . 17
7 Expression of results . 18
7.1 Dimensions . 18
7.2 Additional dimensions, if relevant. 18
7.3 Angle measurement . 19
7.4 Warp . 19
8 Test report . 20
Annex A (informative) Apparatus for square cut elements . 21
Annex B (normative) Test rig to measure cup . 22

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SIST EN 13647:2021
EN 13647:2021 (E)
European foreword
This document (EN 13647:2021) has been prepared by Technical Committee CEN/TC 175 “Round and
sawn timber”, the secretariat of which is held by AFNOR.
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 October 2021, and conflicting national standards shall
be withdrawn at the latest by October 2021.
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 13647:2011.
Compared with EN 13647:2011, the following modifications have been made:
— in lipping measuring;
— in dimensions measuring: thickness of the element, thickness of the top layer, depth and width of the
groove, thickness and width of the tongue.
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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EN 13647:2021 (E)
Introduction
This document is one of a series of standards specifying requirements and test methods for wood flooring
and wood panelling and cladding.
The measurements should be carried out as specified in this document or with any other equipment or
principles giving at least the same accuracy.
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EN 13647:2021 (E)
1 Scope
This document specifies methods of measuring the geometrical characteristics of wood flooring and
wood panelling and cladding elements.
This document does not specify sampling, which is intended to be found in the product standards or test
methods and it does not apply to elements which are installed.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 13756:2018, Wood flooring and parquet — Terminology
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 13756:2018 apply.
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 https://www.iso.org/obp
4 Principles
4.1 General
The measurements shall be carried out only if relevant, taking the product standards into account.
4.2 Dimensions
The dimensions are determined by measuring any characteristic defined in the product standard and
with appropriate tools.
4.3 Angles
Determine square angles by measuring the distance (maximum value) between an edge of the element
and the side of a square whose other side is in line with an adjacent edge of the element.
Determine other angles by the use of a protractor.
4.4 Warp
4.4.1 Cup
Determine cup by measuring, at the middle of the width of the element, the distance separating the face
of the element from the straight reference line joining the top arises of the edges of the element, see
Figures 1 and 2.
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Key
1 width
2 face
3 cup
4 cross section
5 reference line
Figure 1 — Example of convex cup

Key
1 width
2 face
3 cup
4 cross section
5 reference line
Figure 2 — Example of concave cup
4.4.2 Bow
Determine bow by measuring, at the middle of the length of the element, the distance separating the face
of the element from the straight reference line joining the end top arises of the element, see Figures 3
and 4.
If the maximum bow is not in the middle of the length, the measurement can be carried out at the
appropriate place and this should be mentioned in the report.
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Key
1 length
2 face
3 bow
4 edge
5 thickness
6 reference line
For practical reasons, convex bow may be measured in the same way on the back of the element.
Figure 3 — Example of convex bow

Key
1 length
2 face
3 bow
4 edge
5 thickness
6 reference line
Figure 4 — Example of concave bow
4.4.3 Spring
Determine spring by measuring, at the middle of the length of the element, along the lengthwise edges of
the element, the distance separating one edge from the straight reference line joining the two arises of
that edge, see Figure 5.
NOTE The measurement is usually carried out on the edge bearing the groove.
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EN 13647:2021 (E)

Key
1 length
2 face
3 spring
4 reference line
5 width
Figure 5 — Example of spring (element viewed from above)
4.5 Lipping
Determine lipping by measuring the difference in the levels of the face of two adjacent elements when
they are assembled together, see Figure 6.

Key
1 ruler
2 measuring point
3 test specimen
Figure 6 — Test specimens assembled, with the 13 measuring points indicated by ∇
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5 Equipment
5.1 General
The equipment specified in this document is given as an indication. Any other equipment providing the
same results with at least the same accuracy may be used.
5.2 Equipment to measure the dimensions
5.2.1 Calliper
It shall have an accuracy of ± 0,05 mm.
If used to measure the characteristics of tongue and groove profiles, it shall have a built-in depth rod.
It shall also have a useful measuring length corresponding to the width of the elements to be measured.
5.2.2 Micrometer
It shall have a limit deviation of ± 0,05 mm and two parallel flat circular feelers having a diameter of
(10 ± 1) mm.
It shall be used for measurement of total thickness.
NOTE 1 For the measurement of top layer thickness, the device mentioned in 5.2.4 and the procedure described
in 6.5.9 are suitable.
NOTE 2 Other similar optical devices, e.g. microscope are also suitable to be used.
5.2.3 Graduated rule
It shall be used when the dimensions to be measured are out of the calliper’s range.
It shall have a limit deviation of ± 0,5 mm up to a length of 2 m, and ± 1 mm for longer lengths.
5.2.4 Scale magnifier / Threat counter
It shall have a reticule and measuring scale with at least ten times magnification on a (usually foldable)
frame for achieving a defined working distance. The measuring-scale shall have graduations of 0,01 mm.
The measuring range shall be at least 10 mm (see Figure 7).

Figure 7 — Example of a scale magnifier
5.3 Equipment to measure angle values
5.3.1 General
The design of the equipment shall be such as to allow the measurement as close as possible to the face of
the element and preferably on the groove side if the element is tongued and grooved.
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5.3.2 Equipment for square cut elements
— a reference square with its longer arm consistent with the length of the elements to be checked and
shall not be less than 210 mm;
— each arm shall have a fixed feeler at about 10 mm from the corner;
— the longer arm shall have a second feeler, adjustable between 200 mm and 300 mm from the fixed
feeler;
— the shorter arm shall have a gauge, readable to the nearest 0,01 mm, adjustable to the width of the
element to be controlled;
NOTE An example of such a square is shown in Annex A, Figure A.1.
— a calibration square to set the gauge to 0.
5.3.3 Equipment for mitre-cut element
Protractor fitted with a vernier with a limit deviation of ± 1 min of angle.
5.4 Equipment to measure warp
5.4.1 Equipment to measure cup
A gauge with an accuracy of ± 0,01 mm with a rounded tip with a radius of (5 ± 0,2) mm, installed
centrally in relation to the three rounded supports with a radius not less than 5 mm. This shall be
adjustable along a T assembly of bars according to the gauge length to be achieved. The tip of the gauge
in contact with the face of the element shall apply a force of less than 5 N. The weight of the apparatus
should not change the cup of the element beyond the limit of the accuracy of the gauge.
Figure B.1 in Annex B gives an example of such a device and Figure B.2 shows gauging of the device.
5.4.2 Calibration plate
A reference plate of suitable material to calibrate to zero the gauge fitted on the apparatus defined in
5.4.1.
5.4.3 Equipment to measure bow and spring
A straight ruler at least as long as the actual element and a gauge readable to the nearest 0,5 m
...