SIST EN 13353:2022
(Main)Solid wood panels (SWP) - Requirements
Solid wood panels (SWP) - Requirements
This document specifies requirements for solid wood panels as defined in EN 12775 with a maximum thickness of 80 mm for use in dry, humid and exterior conditions as defined in service classes 1, 2 and 3 of EN 1995-1-1:2004.
Additional information on supplementary properties for certain applications is also given.
Massivholzplatten (SWP) - Anforderungen
Dieses Dokument legt Anforderungen an Massivholzplatten, definiert nach EN 12775, mit einer Dicke von höchstens 80 mm zur Verwendung im Trocken , Feucht und Außenbereich, definiert nach den Nutzungsklassen 1, 2 und 3 nach EN 1995-1-1:2004, fest.
Es werden zusätzliche Informationen über weitere Eigenschaften für bestimmte Verwendungszwecke angegeben.
Bois panneautés (SWP) - Exigences
Le présent document spécifie les exigences pour les bois panneautés tels que définis dans l’EN 12775 avec une épaisseur maximale de 80 mm pour utilisation en milieux sec, humide et extérieur comme défini dans les classes de service 1, 2 et 3 de l’EN 1995-1-1:2004.
Des informations supplémentaires sur des propriétés complémentaires pour certaines applications sont également données.
Masivne lesne plošče (SWP) - Zahteve
Ta dokument določa zahteve za masivne lesne plošče, kot je opredeljeno v standardu EN 12775, z največjo debelino 80 mm za uporabo v suhih, vlažnih in zunanjih pogojih, kot je opredeljeno v razredih uporabe 1, 2 in 3 standarda EN 1995-1-1:2004.
Podane so tudi dodatne informacije o dopolnilnih lastnostih za določene vrste uporabe.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 13353:2022
01-september-2022
Nadomešča:
SIST EN 13353:2009+A1:2011
Masivne lesne plošče (SWP) - Zahteve
Solid wood panels (SWP) - Requirements
Massivholzplatten (SWP) - Anforderungen
Bois panneautés (SWP) - Exigences
Ta slovenski standard je istoveten z: EN 13353:2022
ICS:
79.060.99 Druge lesne plošče Other wood-based panels
SIST EN 13353:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 13353:2022
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SIST EN 13353:2022
EN 13353
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2022
EUROPÄISCHE NORM
ICS 79.060.99 Supersedes EN 13353:2008+A1:2011
English Version
Solid wood panels (SWP) - Requirements
Bois panneaut? (SWP) - Exigences Massivholzplatten (SWP) - Anforderungen
This European Standard was approved by CEN on 20 April 2022.
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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13353:2022 E
worldwide for CEN national Members.
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SIST EN 13353:2022
EN 13353:2022 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions and classes . 5
3.1 Terms and definitions . 5
3.2 Classes for solid wood panels indicating their intended use . 6
3.2.1 Technical classes for non-structural use . 6
3.2.2 Technical classes for structural use . 6
3.2.3 Classes for structural use based on individually declared values . 6
4 Requirements . 7
4.1 Dimensional tolerances . 7
4.2 Moisture content at dispatch . 7
4.3 Bonding quality . 7
4.3.1 General. 7
4.3.2 Single layer solid wood panel . 7
4.3.3 Multi-layer solid wood panel . 7
4.3.4 Adhesive for solid wood panels in structural applications . 8
4.4 Biological durability . 8
4.5 Mechanical characteristics . 8
4.5.1 General. 8
4.5.2 Structural applications . 8
4.5.3 Non-structural applications . 10
4.6 Formaldehyde release . 10
5 Supplementary properties . 10
6 Verification of compliance . 10
6.1 General. 10
6.2 External control . 10
6.3 Factory production control . 10
7 Marking . 12
7.1 Boards marketed within the European Economic Area for construction applications
. 12
7.2 Other boards . 12
Annex A (normative) Properties for structural and non-structural applications . 13
Annex B (normative) Alternative to determining the characteristic values for the
homogeneous rectangular substitute cross-section . 14
Bibliography . 15
2
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SIST EN 13353:2022
EN 13353:2022 (E)
European foreword
This document (EN 13353:2022) has been prepared by Technical Committee CEN/TC 112 “Wood-based
panels”, the secretariat of which is held by DIN.
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 January 2023, and conflicting national standards shall
be withdrawn at the latest by January 2023.
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 13353:2008+A1:2011.
Compared to EN 13353:2008+A1:2011, the following changes have been made:
a) additional types of adhesive for load-bearing panels were included, see 4.3.4;
b) modification of the thickness range and of the requirements for single-layer panels given in Table 3;
c) modification of the thickness ranges and of the requirements for multi-layer panels given in Table 4;
d) Annex B (normative) included (alternative to determining the characteristic values for the
homogeneous rectangular substitute cross-section);
e) editorial changes.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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.
3
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SIST EN 13353:2022
EN 13353:2022 (E)
1 Scope
This document specifies requirements for solid wood panels as specified in EN 12775 with a maximum
thickness of 80 mm for use in dry, humid and exterior conditions as specified in service classes 1, 2 and
3 of EN 1995-1-1.
Additional information on supplementary properties for certain applications is given in Annex A.
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 301, Adhesives, phenolic and aminoplastic, for load-bearing timber structures - Classification and
performance requirements
EN 318, Wood based panels - Determination of dimensional changes associated with changes in relative
humidity
EN 322, Wood-based panels - Determination of moisture content
EN 323, Wood-based panels - Determination of density
EN 324-1, Wood-based panels - Determination of dimensions of boards - Part 1: Determination of thickness,
width and length
EN 324-2, Wood-based panels - Determination of dimensions of boards - Part 2: Determination of
squareness and edge straightness
EN 326-1, Wood-based panels - Sampling, cutting and inspection - Part 1: Sampling and cutting of test pieces
and expression of test results
EN 326-2, Wood-based panels - Sampling, cutting and inspection - Part 2: Initial type testing and factory
production control
EN 335, Durability of wood and wood-based products - Use classes: definitions, application to solid wood
and wood-based products
EN 384, Structural timber - Determination of characteristic values of mechanical properties and density
EN 594, Timber structures - Test methods - Racking strength and stiffness of timber frame wall panels
EN 596, Timber structures - Test methods - Soft body impact test of timber framed walls
EN 789, Timber structures - Test methods - Determination of mechanical properties of wood based panels
EN 1058, Wood-based panels - Determination of characteristic 5-percentile values and characteristic mean
values
EN 1195, Timber structures - Test methods - Performance of structural floor decking
EN 1995-1-1, Eurocode 5: Design of timber structures - Part 1-1: General - Common rules and rules for
buildings
4
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SIST EN 13353:2022
EN 13353:2022 (E)
EN ISO 12460-3, Wood-based panels - Determination of formaldehyde release - Part 3: Gas analysis method
(ISO 12460-3)
EN 12775, Solid wood panels - Classification and terminology
EN 12871, Wood-based panels - Determination of performance characteristics for load bearing panels for
use in floors, roofs and walls
EN 13017-1, Solid wood panels - Classification by surface appearance - Part 1: Softwood
EN 13017-2, Solid wood panels - Classification by surface appearance - Part 2: Hardwood
EN 13183-2, Moisture content of a piece of sawn timber - Part 2: Estimation by electrical resistance method
EN 13354, Solid wood panels (SWP) - Bonding quality - Test method
EN 13446, Wood-based panels - Determination of withdrawal capacity of fasteners
EN 13986, Wood-based panels for use in construction - Characteristics, evaluation of conformity and
marking
EN 15416-3, Adhesives for load bearing timber structures other than phenolic and aminoplastic - Test
methods - Part 3: Creep deformation test at cyclic climate conditions with specimens loaded in bending shear
CEN/TS 635-4, Plywood - Classification by surface appearance - Part 4: Parameters of ability for finishing,
guideline
3 Terms and definitions and classes
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 12775 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1.1
solid wood panel for use in dry conditions
panel intended for use in interior applications with no risk of wetting as specified in service class 1 of
EN 1995-1-1 and use class 1 of EN 335
Note 1 to entry: Service class 1 is characterized by a moisture content of the material corresponding to a
temperature of 20 °C and a relative humidity of the surrounding air exceeding 65 % for only a few weeks per year.
5
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SIST EN 13353:2022
EN 13353:2022 (E)
3.1.2
solid wood panel for use in humid conditions
panel intended for use in protected external applications as specified in service class 2 of EN 1995-1-1
and use class 2 of EN 335
Note 1 to entry: It is also capable of resisting weather exposure for short periods (e.g. when exposed during
construction).
Note 2 to entry: Service class 2 is characterized by a moisture content of the material corresponding to a
temperature of 20 °C and a relative humidity of the surrounding air exceeding 85 % for only a few weeks per year.
3.1.3
solid wood panel for use in exterior conditions
panel intended for use in unprotected external applications as specified in service class 3 of EN 1995-1-1
and use class 3 of EN 335
Note 1 to entry: It is also capable of withstanding exposure to weathering conditions and liquid water, or water
vapour in a damp but ventilated location where it can frequently attain a moisture content above 20 %.
Note 2 to entry: Service class 3 is characterized by a moisture content of the material higher than service class 2.
3.2 Classes for solid wood panels indicating their intended use
3.2.1 Technical classes for non-structural use
SWP/1 NS: Solid wood panel for non-structural use in dry conditions according to 3.1.1
SWP/2 NS: Solid wood panel for non-structural use in humid conditions according to 3.1.2
SWP/3 NS: Solid wood panel for non-structural use in exterior conditions according to 3.1.3
3.2.2 Technical classes for structural use
SWP/1 S: Solid wood panel for structural use in dry conditions according to 3.1.1
SWP/2 S: Solid wood panel for structural use in humid conditions according to 3.1.2
SWP/3 S: Solid wood panel for structural use in exterior conditions according to 3.1.3
3.2.3 Classes for structural use based on individually declared values
SWP/1 SD: Solid wood panel for structural use in dry conditions according to 3.1.1
SWP/2 SD: Solid wood panel for structural use in humid conditions according to 3.1.2
SWP/3 SD: Solid wood panel for structural use in exterior conditions according to 3.1.3
Technical classes are intended to simplify the use of standardized solid wood panels by providing
supporting data e.g. in EN 12369-3 as well as simplifying marking in accordance with EN 13986.
Nevertheless, products should not be limited by the requirements according to the technical classes.
Therefore, classes based on individually declared values may be used for such products. The calculation
of characteristic values should be performed according to EN 1058 or EN 14358.
6
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SIST EN 13353:2022
EN 13353:2022 (E)
4 Requirements
4.1 Dimensional tolerances
The tolerances for the nominal length, width and thickness, thickness within the panel, edge straightness
and squareness are given in Table 1. They relate to the moisture content at time of dispatch for large and
medium-sized panels according to EN 12775 and shall be determined in accordance with EN 324-1 and
EN 324-2 as appropriate.
Table 1 — Dimensional tolerances for both large and medium-sized panels
a b
Tolerances on Thickness Tolerance for
Tolerance on
Nominal length Tolerance within
nominal Edge straightness Squareness
a
and width a single panel
thickness
±2,0 mm 0,5 mm ±1,0 mm 1,0 mm/m 1,0 mm/m
a
Determined in accordance with EN 324-1.
b
Determined in accordance with EN 324-2.
4.2 Moisture content at dispatch
At time of dispatch the moisture content according to EN 322 shall be (8 ± 2) % for use in dry conditions,
(10 ± 3) % for use in humid conditions and (12 ± 3) % for use in exterior conditions.
If chemically or thermally treated wood is used, the equilibrium moisture content of the panels can differ
significantly to those made of natural wood. In that case, a deviation from the above mentioned
requirements concerning moisture content is possible.
If another moisture content is necessary, e.g. due to regi
...
SLOVENSKI STANDARD
oSIST prEN 13353:2021
01-marec-2021
Masivne lesne plošče (SWP) - Zahteve
Solid wood panels (SWP) - Requirements
Massivholzplatten (SWP) - Anforderungen
Bois panneautés (SWP) - Exigences
Ta slovenski standard je istoveten z: prEN 13353
ICS:
79.060.99 Druge lesne plošče Other wood-based panels
oSIST prEN 13353:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 13353:2021
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oSIST prEN 13353:2021
DRAFT
EUROPEAN STANDARD
prEN 13353
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2021
ICS 79.060.99 Will supersede EN 13353:2008+A1:2011
English Version
Solid wood panels (SWP) - Requirements
Bois panneautés (SWP) - Exigences Massivholzplatten (SWP) - Anforderungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 112.
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, 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.
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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13353:2021 E
worldwide for CEN national Members.
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oSIST prEN 13353:2021
prEN 13353:2021 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions and classes . 6
3.1 Terms and definitions . 6
3.2 Classes for solid wood panels indicating their intended use . 6
3.2.1 Technical classes for non-structural use . 6
3.2.2 Technical classes for structural use . 6
3.2.3 Classes for structural use based on individually declared values . 7
4 Requirements . 7
4.1 Dimensional tolerances . 7
4.2 Moisture content at dispatch . 7
4.3 Bonding quality . 7
4.3.1 General. 7
4.3.2 Single layer solid wood panel . 8
4.3.3 Multi-layer solid wood panel . 8
4.3.4 Adhesive for solid wood panels in structural applications . 8
4.4 Biological durability . 8
4.5 Mechanical characteristics . 8
4.5.1 General. 8
4.5.2 Structural applications . 9
4.5.3 Non-structural applications . 10
4.6 Formaldehyde release . 10
5 Supplementary properties . 10
6 Verification of compliance . 11
6.1 General. 11
6.2 External control . 11
6.3 Factory production control . 11
7 Marking . 12
7.1 Boards marketed within the European Economic Area for construction applications . 12
7.2 Other boards . 13
Annex A (normative) Properties for structural and non-structural applications . 14
Annex B (normative) Alternative to determining the characteristic values for the
homogeneous rectangular substitute cross-section . 15
Bibliography . 16
2
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oSIST prEN 13353:2021
prEN 13353:2021 (E)
European foreword
This document (prEN 13353:2021) has been prepared by Technical Committee CEN/TC 112 “Wood-
based panels”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 13353:2008+A1:2011.
Compared to EN 13353:2008+A1:2011, the following changes have been made:
a) additional types of adhesive for load-bearing panels were included, see 4.3.4;
b) modification of the thickness range and of the requirements for single-layer panels given in Table 3;
c) modification of the thickness ranges and of the requirements for multi-layer panels given in Table 4;
d) Annex B (normative) included (alternative to determining the characteristic values for the
homogeneous rectangular substitute cross-section);
e) editorial changes.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
3
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oSIST prEN 13353:2021
prEN 13353:2021 (E)
1 Scope
This document specifies requirements for solid wood panels as defined in EN 12775 with a maximum
thickness of 80 mm for use in dry, humid and exterior conditions as defined in service classes 1, 2 and 3
1
of EN 1995-1-1:2004 .
Additional information on supplementary properties for certain applications is also given.
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 301:2017, Adhesives, phenolic and aminoplastic, for load-bearing timber structures — Classification
and performance requirements
EN 318, Wood based panels — Determination of dimensional changes associated with changes in relative
humidity
EN 322, Wood-based panels — Determination of moisture content
EN 323, Wood-based panels — Determination of density
EN 324-1, Wood-based panels — Determination of dimensions of boards — Part 1: Determination of
thickness, width and length
EN 324-2, Wood-based panels — Determination of dimensions of boards — Part 2: Determination of
squareness and edge straightness
EN 326-1, Wood-based panels — Sampling, cutting and inspection — Part 1: Sampling and cutting of test
pieces and expression of test results
EN 326-2, Wood-based panels — Sampling, cutting and inspection — Part 2: Initial type testing and
factory production control
EN 335, Durability of wood and wood-based products — Use classes: definitions, application to solid wood
and wood-based products
EN 338, Structural timber — Strength classes
EN 384, Structural timber — Determination of characteristic values of mechanical properties and density
EN 594, Timber structures — Test methods — Racking strength and stiffness of timber frame wall panels
EN 596, Timber structures — Test methods — Soft body impact test of timber framed walls
CEN/TS 635-4, Plywood — Classification by surface appearance — Part 4: Parameters of ability for
finishing, guideline
EN 789, Timber structures — Test methods — Determination of mechanical properties of wood based
panels
EN 1058, Wood-based panels — Determination of characteristic 5-percentile values and characteristic
mean values
4
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oSIST prEN 13353:2021
prEN 13353:2021 (E)
EN 1156, Wood-based panels — Determination of duration of load and creep factors
EN 1195, Timber structures — Test methods — Performance of structural floor decking
1
EN 1995-1-1:2004, Eurocode 5: Design of timber structures — Part 1-1: General — Common rules and
rules for buildings
EN ISO 12460-3, Wood-based panels — Determination of formaldehyde release — Part 3: Gas analysis
method (ISO 12460-3)
EN 12775, Solid wood panels — Classification and terminology
EN 12871, Wood-based panels — Determination of performance characteristics for load bearing panels
for use in floors, roofs and walls
EN 13017-1, Solid wood panels — Classification by surface appearance — Part 1: Softwood
EN 13017-2, Solid wood panels — Classification by surface appearance — Part 2: Hardwood
EN 13183-2, Moisture content of a piece of sawn timber — Part 2: Estimation by electrical resistance
method
EN 13354, Solid wood panels (SWP) — Bonding quality — Test method
EN 13446, Wood-based panels — Determination of withdrawal capacity of fasteners
EN 13986, Wood-based panels for use in construction — Characteristics, evaluation of conformity and
marking
EN 14358, Timber structures — Calculation and verification of characteristic values
EN 15416-3, Adhesives for load bearing timber structures other than phenolic and aminoplastic — Test
methods — Part 3: Creep deformation test at cyclic climate conditions with specimens loaded in bending
shear
EN 15416-5, Adhesives for load bearing timber structures other than phenolic and aminoplastic — Test
methods — Part 5: Determination of minimum pressing time under referenced conditions
EN 15425, Adhesives — One component polyurethane (PUR) for load-bearing timber structures —
Classification and performance requirements
EN 16254:2013+A1:2016, Adhesives — Emulsion polymerized isocyanate (EPI) for load-bearing timber
structures — Classification and performance requirements
EN 16351:2015, Timber structures — Cross laminated timber — Requirements
1
As impacted by EN 1995-1-1:2004/AC:2006, EN 1995-1-1:2004/A1:2008 and EN 1995-1-1:2004/A2:2014.
5
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oSIST prEN 13353:2021
prEN 13353:2021 (E)
3 Terms and definitions and classes
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 12775 and the following 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
3.1.1
solid wood panel for use in dry conditions
panel intended for use in interior applications with no risk of wetting as defined in service class 1 of
1
EN 1995-1-1:2004 and use class 1 of EN 335
Note 1 to entry: Service class 1 is characterised by a moisture content of the material corresponding to a
temperature of 20 °C and a relative humidity of the surrounding air exceeding 65 % for only a few weeks per year.
3.1.2
solid wood panel for use in humid conditions
panel intended for use in protected external applications as defined in service class 2 of
1
EN 1995-1-1:2004 and use class 2 of EN 335
Note 1 to entry: It is also capable of resisting weather exposure for short periods (e.g. when exposed during
construction).
Note 2 to entry: Service class 2 is characterised by a moisture content of the material corresponding to a
temperature of 20 °C and a relative humidity of the surrounding air exceeding 85 % for only a few weeks per year.
3.1.3
solid wood panel for use in exterior conditions
panel intended for use in unprotected external applications as defined in service class 3 of
1
EN 1995-1-1:2004 and use class 3 of EN 335
Note 1 to entry: It is also capable of withstanding exposure to weathering conditions and liquid water, or water
vapour in a damp but ventilated location where it can frequently attain a moisture content above 20 %.
Note 2 to entry: Service class 3 is characterised by a moisture content of the material higher than service class 2.
3.2 Classes for solid wood panels indicating their intended use
3.2.1 Technical classes for non-structural use
SWP/1 NS: Solid wood panel for non-structural use in dry conditions according to 3.1.1
SWP/2 NS: Solid wood panel for non-structural use in humid conditions according to 3.1.2
SWP/3 NS: Solid wood panel for non-structural use in exterior conditions according to 3.1.3
3.2.2 Technical classes for structural use
SWP/1 S: Solid wood panel for structural use in dry conditions according to 3.1.1
SWP/2 S: Solid wood panel for structural use in humid conditions according to 3.1.2
SWP/3 S: Solid wood panel for structural use in exterior conditions according to 3.1.3
6
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oSIST prEN 13353:2021
prEN 13353:2021 (E)
3.2.3 Classes for structural use based on individually declared values
SWP/1 SD: Solid wood panel for structural use in dry conditions according to 3.1.1
SWP/2 SD: Solid wood panel for structural use in humid conditions according to 3.1.2
SWP/3 SD: Solid wood panel for structural use in exterior conditions according to 3.1.3
Technical classes are intended to simplify the use of standardized solid wood panels by providing
supporting data e.g. in EN 12369-3 as well as simplifying marking in accordance with EN 13986.
Nevertheless, products should not be limited by the requirements according to the technical classes.
Therefore, classes based on individually declared values may be used for such products. The calculation
of characteristic values should be performed according to EN 1058 or EN 14358.
4 Requirements
4.1 Dimensional tolerances
The tolerances for the nominal length, width and thickness, thickness within the panel, edge
straightness and squareness are given in Table 1. They relate to the moisture content at time of
despatch for large and medium-sized panels according to EN 12775 and shall be determined in
accordance with EN 324-1 and EN 324-2 as appropriate.
Table 1 — Dimensional tolerances for both large and medium-sized panels
a b
Tolerances on Thickness Tolerance for
Tolerance on
Nominal length Tolerance within
nominal Edge straightness Squareness
a
and width an single panel
thickness
±2,0 mm 0,5 mm ±1,0 mm 1,0 mm/m 1,0 mm/m
a
Determined in accordance with EN 324-1
b
Determined in accordance with EN 324-2
4.2 Moisture content at dispatch
At time of dispatch the moisture content according to EN 322 shall be (8 ± 2) % for use in dry
conditions, (10 ± 3) % for use in humid conditions and (12 ± 3) % for use in exterior conditions.
If chemically or thermally treated wood is used, the equilibrium moisture content of the panels can
differ significantly to those made of natural wood. In that case, a deviation from the above mentioned
requirements concerning moisture content is possible.
If another moisture content is necessary, e.g. due to regional climatic condition, the appropriate
moisture content has to be specified explicitly.
4.3 Bonding quality
4.3.1 General
The bonding quality shall
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