prEN 351-1

Durability of wood and wood-based products - Preservative-treated solid wood - Part 1: Classification of preservative penetration and retention

This part of EN 351 establishes a classification of preservative-treated wood in terms of preservative penetration and gives guidance on a classification of retention. These shall be used as a basis for specifying preservative treatments for particular products.
This part of EN 351 provides terminology to be used by the specifier when preparing a preservative treatment specification or product standard. It is not a treatment specification in itself.
This part of EN 351 is applicable to the production of preservative-treated solid wood, including glued laminated timber, suitable for use in those service conditions defined by the use classes in EN 335. It does not apply to any subsequent examination of treated wood in service.
This part of EN 351 is applicable to the protection of wood against attack by wood-destroying and wood-disfiguring fungi, insects and marine organisms.
NOTE   Protection against wood-disfiguring fungi is an optional property verified by testing in accordance with EN 599-1.
This part of EN 351 does not consider other properties of treated wood, for example odour, compatibility with other materials, such as corrosivity of fasteners. Nor does it consider any properties from the health, safety and environmental point of view.
This part of EN 351 does not apply to wood to be treated with formulations which are applied to timber in service to eliminate or control an existing fungal or insect infestation, or the prevention of attack by sapstain fungi, or insects in green timber.
Annex A (informatives) provides a decision process for defining preservative treatment requirements.
Annex B (informative) gives an example of the marking system.

Dauerhaftigkeit von Holz und Holzprodukten - Mit Holzschutzmitteln behandeltes Vollholz - Teil 1: Klassifizierung der Schutzmitteleindringung und -aufnahme

Dieser Teil von EN 351 stellt für mit Holzschutzmitteln zu behandelndes Holz eine Klassifikation der Eindringtiefen des Holzschutzmittels auf und gibt eine Anleitung zur Klassifikation der Aufnahme. Diese müssen als Grundlage zur Festlegung von Schutzbehandlungen für spezielle Produkte angewendet werden.
Dieser Teil von EN 351 enthält die Terminologie zur Verwendung durch den Ausschreibenden bei der Erstellung einer Spezifikation oder Produktnorm für eine Schutzbehandlung. Es ist keine Spezifikation für die Schutzbehandlung selbst.
Dieser Teil von EN 351 ist anwendbar bei der Herstellung von mit Holzschutzmitteln behandeltem Vollholz, einschließlich Brettschichtholz, das geeignet ist für den Einsatz in bestimmten Anwendungsbereichen, die durch die Gebrauchsklassen nach EN 335 definiert sind. Er ist nicht anwendbar für alle späteren Untersuchungen am getränkten Holz im Gebrauch.
Dieser Teil von EN 351 ist anwendbar für den Schutz des Holzes gegen den Angriff von Holz zerstörenden und Holz verfärbenden Pilzen, Insekten und Schädlingen im Meerwasser.
ANMERKUNG   Schutz gegen Holz verfärbende Pilze ist eine durch Prüfung nach EN 599-1 nachgewiesene wahlweise Eigenschaft.
Nicht berücksichtigt werden in diesem Teil von EN 351 andere Eigenschaften des behandelten Holzes, wie zum Beispiel Geruch und Verträglichkeit mit anderen Materialien wie Korrosionsverhalten von Befestigungs¬mitteln. Auch bleiben Gesundheits-, Sicherheits- und Umweltbelange unberücksichtigt.
Dieser Teil von EN 351 gilt nicht für Holz, das mit Präparaten behandelt werden soll, welche am verarbeiteten Holz zur Beseitigung oder Eindämmung eines bestehenden Pilz- oder Insektenbefalls angewendet werden, oder die zur Vorbeugung eines Befalls durch Stamm- und Schnittholzbläuepilze oder Frischholzinsekten bestimmt sind.
Anhang A (informativ) stellt einen Entscheidungsprozess zur Festlegung der Anforderungen an eine Schutzbehandlung dar.
Anhang B (informativ) enthält ein Beispiel des Kennzeichnungssystems.

Durabilité du bois et des matériaux dérivés du bois - Bois massif traité avec produit de préservation - Partie 1 : Classification des pénétrations et rétentions des produits de préservation

La présente partie de l'EN 351 établit une classification du bois traité avec produit de préservation, en termes de pénétration du produit, et fournit des recommandations relatives à la classification des rétentions. Ces classifications doivent servir de base à la spécification des traitements de préservation pour les divers types d'ouvrages.
La présente partie de l'EN 351 fournit la terminologie à utiliser par le prescripteur lors de l'élaboration d'une spécification de traitement de préservation ou d'une norme d'ouvrage. Il ne s'agit pas d'une spécification de traitement en soi.
La présente partie de l'EN 351 s'applique à la production de bois massif traité, y compris le bois lamellé-collé, utilisable dans les conditions de service définies par les classes d'emploi de l'EN 335. Elle ne s'applique pas aux examens ultérieurs du bois traité déjà mis en oeuvre.
La présente partie de l'EN 351 concerne la protection du bois contre les attaques de champignons lignivores et de discoloration, d'insectes et de térébrants marins.
NOTE   La protection contre les champignons de discoloration est une propriété optionnelle, vérifiable par des essais menés conformément à l'EN 599-1.
La présente partie de l'EN 351 ne prend pas en compte les autres propriétés du bois traité comme, par exemple, l'odeur ou la compatibilité avec d'autres matériaux, tels que la corrosivité des fixations. Elle ne prend pas non plus en compte quelque propriété que ce soit du point de vue de la santé, de la sécurité et de l'environnement.
La présente partie de l'EN 351 ne s'applique pas aux bois devant être traités avec des formulations pour des bois d'oeuvre en service afin d'éradiquer ou de stopper une infestation existante d'insectes ou de champignons, ni à la prévention d'attaques dues à des champignons de discoloration ou des insectes de bois frais.
L'Annexe A (informative) fournit un arbre de décision relatif à la détermination des traitements de préservation.
L'Annexe B (informative) propose un exemple de système de marquage.

Trajnost lesa in lesnih proizvodov - Zaščiten masivni les - 1. del: Razvrščanje biocidnih proizvodov glede na penetracijo in navzem TC: Trajnost lesa in lesnih proizvodov - Les zaščiten z biocidnimi proizvodi - 1. del: Razvrščanje biocidnih proizvodov glede na penetracijo in navzem

General Information

• Status: Not Published
• ICS: 71.100.50 - Wood-protecting chemicals
• ICS: 79.040 - Wood, sawlogs and sawn timber
• Technical Committee: CEN/TC 38 - Durability of wood and derived materials
• Drafting Committee: CEN/TC 38/WG 26 - Physical/chemical factors (analytical methods)
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Mandate: M/112 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on structural timber products
• Ref Project: oSIST prEN 351-1:2020 - Durability of wood and wood-based products - Preservative-treated solid wood - Part 1: Classification of preservative penetration and retention

RELATIONS

• Revised: EN 351-1:2007 - Durability of wood and wood-based products - Preservative-treated solid wood - Part 1: Classification of preservative penetration and retention
• Effective Date: 21-Nov-2017

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 351-1:2020
01-september-2020
Trajnost lesa in lesnih proizvodov - Zaščiten masivni les - 1. del: Razvrščanje
biocidnih proizvodov glede na penetracijo in navzem

Durability of wood and wood-based products - Preservative-treated solid wood - Part 1:

Classification of preservative penetration and retention

Dauerhaftigkeit von Holz und Holzprodukten - Mit Holzschutzmitteln behandeltes Vollholz

- Teil 1: Klassifizierung der Schutzmitteleindringung und -aufnahme

Durabilité du bois et des matériaux dérivés du bois - Bois massif traité avec produit de

préservation - Partie 1 : Classification des pénétrations et rétentions des produits de

préservation
Ta slovenski standard je istoveten z: prEN 351-1
ICS:
71.100.50 Kemikalije za zaščito lesa Wood-protecting chemicals
79.040 Les, hlodovina in žagan les Wood, sawlogs and sawn
timber
oSIST prEN 351-1:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 351-1:2020
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oSIST prEN 351-1:2020
DRAFT
EUROPEAN STANDARD
prEN 351-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2020
ICS 71.100.50; 79.040 Will supersede EN 351-1:2007
English Version
Durability of wood and wood-based products -
Preservative-treated solid wood - Part 1: Classification of
preservative penetration and retention

Durabilité du bois et des matériaux dérivés du bois - Dauerhaftigkeit von Holz und Holzprodukten - Mit

Bois massif traité avec produit de préservation - Partie Holzschutzmitteln behandeltes Vollholz - Teil 1:

1 : Classification des pénétrations et rétentions des Klassifizierung der Schutzmitteleindringung und -

produits de préservation aufnahme

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 38.

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

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 351-1:2020 E

worldwide for CEN national Members.
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oSIST prEN 351-1:2020
prEN 351-1:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Introduction .................................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions ................................................................................................................................... 6

4 Raw materials ................................................................................................................................................... 9

4.1 Wood to be treated ......................................................................................................................................... 9

4.2 Wood preservatives ....................................................................................................................................... 9

5 Preservative-treated solid wood ............................................................................................................... 9

5.1 General ................................................................................................................................................................ 9

5.2 Penetration ........................................................................................................................................................ 9

5.2.1 Penetration requirements ........................................................................................................................... 9

5.2.2 Compliance with penetration requirements ......................................................................................... 9

5.3 Retention ......................................................................................................................................................... 12

5.3.1 Setting the retention requirement ......................................................................................................... 12

5.3.2 Compliance with retention requirements........................................................................................... 12

6 Treatment specifications ........................................................................................................................... 12

7 Factory production control ...................................................................................................................... 12

7.1 General ............................................................................................................................................................. 12

7.2 Direct and indirect testing ........................................................................................................................ 13

7.2.1 Direct testing ................................................................................................................................................. 13

7.2.2 Indirect testing .............................................................................................................................................. 13

8 Marking ............................................................................................................................................................ 13

Annex A (informative) Decision process for defining preservative treatment requirements ........ 15

Annex B (informative) Marking system .............................................................................................................. 17

Bibliography ................................................................................................................................................................. 18

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European foreword

This document (prEN 351-1:2020) has been prepared by Technical Committee CEN/TC 38 “Durability of

Wood and Wood-based products”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.

This document has been prepared under a standardization request given to CEN by the European

Commission and the European Free Trade Association.
This document will supersede EN 351-1:2007.

Significant technical differences between this edition and EN 351-1:2007 are as follows:

— optional requirement on longitudinal penetration has been deleted;

— compliance with penetration and retention requirements have been further elaborated;

— clause on marking has been updated;
— Figure A.1 has been updated;

— Annex C, showing penetration classes according to EN 351-1:1995, has been deleted.

This document consists of two parts. Part 1 is concerned with defining the penetration requirements and

gives guidance on the retention requirements for preservatives in preservative-treated solid wood and

Part 2 gives guidance on the general procedures to be followed in the sampling for analysis of

preservative-treated solid wood.
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Introduction

This part of EN 351 allows a specifier or user to choose a preservative treatment for a solid wood product

taking into account its intended service or the needs of different regional or traditional practices

throughout Europe and the use class conditions to which the solid wood products will be exposed (see

EN 335). In addition, it provides the basis on which treatments for timber in European product standards

are to be defined. No attempt has been made to quantify the working life that could be expected from a

particular preservative treatment as this will also depend on the geographical location and the associated

climate of the service environment. The performance of treated wood cannot be assessed directly, for

example by field tests or bioassay, as no agreed documents exist specifically for this purpose. As a

consequence the penetration and retention of a preservative in treated wood are used to define quality

of treatment. The penetration and retention values are measured by analysis of the active ingredient(s)

in the treated wood.

Preservative treatment for certain wood species used in the different use classes might be unnecessary

owing to their natural durability (see EN 350 and EN 460). If preservative treatment is necessary,

preservatives with appropriate efficacy against wood destroying organisms as specified in EN 599-1 need

to be chosen.
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prEN 351-1:2020 (E)
1 Scope

This part of EN 351 establishes a classification of preservative-treated wood in terms of preservative

penetration and gives guidance on a classification of retention. These shall be used as a basis for

specifying preservative treatments for particular products.

This part of EN 351 provides terminology to be used by the specifier when preparing a preservative

treatment specification or product standard. It is not a treatment specification in itself.

This part of EN 351 is applicable to the production of preservative-treated solid wood, including glued

laminated timber, suitable for use in those service conditions defined by the use classes in EN 335. It does

not apply to any subsequent examination of treated wood in service.

This part of EN 351 is applicable to the protection of wood against attack by wood-destroying and wood-

disfiguring fungi, insects and marine organisms.

NOTE Protection against wood-disfiguring fungi is an optional property verified by testing in accordance with

EN 599-1.

This part of EN 351 does not consider other properties of treated wood, for example odour, compatibility

with other materials, such as corrosivity of fasteners. Nor does it consider any properties from the health,

safety and environmental point of view.

This part of EN 351 does not apply to wood to be treated with formulations which are applied to timber

in service to eliminate or control an existing fungal or insect infestation, or the prevention of attack by

sapstain fungi, or insects in green timber.

Annex A (informatives) provides a decision process for defining preservative treatment requirements.

Annex B (informative) gives an example of the marking system.
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 335, Durability of wood and wood-based products — Use classes: definitions, application to solid wood

and wood-based products

EN 351-2, Durability of wood and wood-based products — Preservative-treated solid wood — Part 2:

Guidance on sampling for the analysis of preservative-treated wood

EN 599-1, Durability of wood and wood-based products — Efficacy of preventive wood preservatives as

determined by biological tests — Part 1: Specification according to use class

EN 1001-2:2005, Durability of wood and wood based products — Terminology — Part 2: Vocabulary

ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by

acceptance quality limit (AQL) for lot-by-lot inspection
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3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 1001-2:2005 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 http://www.iso.org/obp
3.1
active ingredient(s)

individual chemical compound or compounds included in a wood preservative product to give it specific

activity against biological agents of deterioration
[Source: EN 1001-2:2005, 4.01]
3.2
analytical zone

that part of the treated wood which is analysed for assessing compliance with the retention requirement

(see 3.16)
[Source: EN 1001-2:2005, 4.03]

Note 1 to entry: The analytical zone is taken from the lateral surfaces of the treated wood. The depth to which

sampling is required will depend upon the species of wood being analysed and the treatment level concerned.

3.3
batch

clearly identifiable collection of units of preservative-treated wood manufactured to conform to the same

defined penetration and retention requirements
[Source: EN 1001-2:2005, 4.04]
3.4
biological reference value

amount in grams per square metre or kilograms per cubic metre of a wood preservative (as product)

found to be effective in the test in preventing attack by the particular biological agent being tested

[Source: EN 1001-2:2005, 4.06]
3.5
charge
all the wood treated together in a single operation
[Source: EN 1001-2:2005, 4.13]
3.6
composite sample

collection of all test samples derived from the sampling units taken from the batch in accordance with the

chosen sampling plan for the determination of retention
[Source: EN 1001-2:2005, 4.15]
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3.7
critical value

value equivalent to the highest biological reference value (in grams per square metre or kilograms per

cubic metre) obtained from all the biological tests carried out in accordance with EN 599-1 for any given

use class
[Source: EN 1001-2:2005, 4.18]

Note 1 to entry: The critical value will vary according to use class, method of application, and organisms against

which the preservative is to provide protection and whether it is to be applied to softwood or hardwood.

3.8
exposed heartwood
heartwood of a timber component that is not enclosed by sapwood
[Source: EN 1001-2:2005, 1.14]
3.9
glued laminated timber (glulam)

structural member formed by the lateral surfaces of timber laminations with the grain running essentially

parallel
3.10
incising
procedure of puncturing the lateral surfaces of wood as an aid in securi
...