This document lists visual strength grades, species and sources of timber, and specifies the strength classes to which they are assigned. The assignments listed are for strength classes documented in EN 338.
Structural timber that has previously been graded cannot be re-graded to the same or different grades unless the method of determining characteristic values has made allowances for changes to the timber population caused by the previous grading.
NOTE 1   Consequently, the assignments stated in this document apply to timber that has not been previously strength graded in a way that introduces a bias on the population of timber to be graded, as compared to ungraded material.
Species/grades or species combination/grades are assigned to strength classes in accordance with EN 14081-1 and supporting standards, such as EN 384.
This document contains a list of assignments but is not intended to be exhaustive.
NOTE 2   Timber graded by machine to EN 14081-1 is graded directly to the strength classes and marked accordingly. Machine grading is therefore not referenced in this document.

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This document specifies the safety requirements and measures for single spindle vertical moulding machines (defined in 3.1), capable of continuous production use and hereinafter referred to also as “machines”.
The machines are designed to cut solid wood and material with similar physical characteristics to wood.
This document deals with all significant hazards, hazardous situations and events as listed in Annex A, relevant to the machines when they are operated, adjusted and maintained as intended and under the conditions foreseen by the manufacturer including reasonably foreseeable misuse. Transport, assembly, dismantling, disabling and scrapping phases have also been taken into account.
This document is also applicable to machines fitted with one or more of the following devices/additional working units, whose hazards have been dealt with:
a)       device to adjust the arbor vertically;
b)       device to tilt the arbor;
c)        device to fit a manually operated tenoning sliding table;
d)       glass bead saw unit;
e)       adjustable table insert;
f)         device for changing the direction of rotation of the spindle;
g)       device for fixing shank mounted tools on the arbor;
h)       interchangeable arbor;
i)         quick tool/arbor change system;
j)         demountable power feed unit;
k)       support for the demountable power feed unit with power-driven adjustments.
This document does not apply to
—     machines equipped with outboard bearings,
—     machines equipped with powered movements of a front extension table and/or a tenoning sliding table.
This document is not applicable to machines intended for use in potentially explosive atmospheres or to machines manufactured prior to the date of its publication.

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This document specifies the requirements for softboards as defined in EN 316, with a density from 230 kg/m³ to 400 kg/m³.
The values listed in this document relate to product properties but they are not characteristic values to be used in design calculations.
NOTE   Panels which are intended for use exclusively as thermal insulating products are covered by EN 13171.

  • Standard
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This document specifies the safety requirements and measures for single spindle vertical moulding machines (defined in 3.1), capable of continuous production use and hereinafter referred to also as “machines”. The machines are designed to cut solid wood and material with similar physical characteristics to wood. This document deals with all significant hazards, hazardous situations and events as listed in Annex A, relevant to the machines when they are operated, adjusted and maintained as intended and under the conditions foreseen by the manufacturer including reasonably foreseeable misuse. Transport, assembly, dismantling, disabling and scrapping phases have also been taken into account. This document is also applicable to machines fitted with one or more of the following devices/additional working units, whose hazards have been dealt with: a) device to adjust the arbor vertically; b) device to tilt the arbor; c) device to fit a manually operated tenoning sliding table; d) glass bead saw unit; e) adjustable table insert; f) device for changing the direction of rotation of the spindle; g) device for fixing shank mounted tools on the arbor; h) interchangeable arbor; i) quick tool/arbor change system; j) demountable power feed unit; k) support for the demountable power feed unit with power-driven adjustments. This document does not apply to — machines equipped with outboard bearings, — machines equipped with powered movements of a front extension table and/or a tenoning sliding table. This document is not applicable to machines intended for use in potentially explosive atmospheres or to machines manufactured prior to the date of its publication.

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This document specifies the requirements for softboards as defined in EN 316, with a density from 230 kg/ m3 to 400 kg/ m3.
The values listed in this document relate to product properties but they are not characteristic values to be used in design calculations.
NOTE   Panels which are intended for use exclusively as thermal insulating products are covered by EN 13171.

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This document specifies a method for the determination of linear shrinkage in the radial and tangential directions of wood.

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This document specifies methods for the determination of volumetric shrinkage of wood.

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    5 pages
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This document specifies a procedure for a chamber test with different options of chamber sizes to measure the formaldehyde concentrations in air from wood products under defined test conditions of temperature, relative humidity, loading and air exchange rate. Results obtained from this small-scale chamber test method can be used for quality control (factory production control – ‘FPC’) based on correlation established by reference chamber test methods according to ISO, EN or ASTM standards. The establishment of a correlation is described in Annex D.

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This document specifies a test method to determine releasable 2,4,6-trichloroanisole (TCA) from all types of cork stoppers and their constituents.

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    6 pages
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  • Standard
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This document specifies a procedure for determination of accelerated formaldehyde release from uncoated and coated wood-based panels using the gas analysis method. The procedure is also suitable for the testing of other materials (e.g. edge bands, floor coverings, foams, foils, laminated wood products, veneered wood products, coated wood products).

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This document specifies a procedure for determination of accelerated formaldehyde release from uncoated and coated wood-based panels using the gas analysis method. The procedure is also suitable for the testing of other materials (e.g. edge bands, floor coverings, foams, foils, laminated wood products, veneered wood products, coated wood products).

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This document specifies a procedure for determination of accelerated formaldehyde release from uncoated and coated wood-based panels using the gas analysis method. The procedure is also suitable for the testing of other materials (e.g. edge bands, floor coverings, foams, foils, laminated wood products, veneered wood products, coated wood products).

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  • Standard
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This European Standard specifies the characteristics of multi-layer parquet elements for internal use as flooring.

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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.

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This part of EN 351 gives guidance on the general procedures to be used in obtaining samples of preservative-treated wood for the determination of penetration and retention of wood preservative. It also gives guidance on how to measure the penetration and retention of a wood preservative in the treated wood.
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.
This part of EN 351 is not applicable to preservative-treated wood in service. However, the sampling guidance provided within this part of EN 351 may be applied for the subsequent examination of treated wood in service.
Annex A (informative) provide a selection of number of sampling units.
Annex B (informative) provides examples of retention measurements.

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This document establishes the classification, by quality, of raw parquet elements intended for the manufacture of strips for different types of parquet floorings of the following wood species: — oak (Quercus sp.), — beech (Fagus sylvatica sp.), — birch (Betula sp.), — maple (Acer sp.), — fir (Abies sp.), and — spruce (Picea sp.).

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This document specifies the manufacturing characteristics, the dimensions, the tolerances, the methods for quality control and delivery conditions, the measurement and the marking of hardwood and softwood raw parquet elements. NOTE The classification of raw parquet elements according to specific characteristics and wood defects are specified, for the different species of wood, in the relevant International Standards such as ISO 4561. This document applies to raw parquet elements intended for the manufacture of strips for different types of parquet flooring.

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  • Standard
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This document establishes the classification, by quality, of non-assembled solid parquet strips of the following wood species: — oak (Quercus sp.), — hickory (Carya sp.), — beech (Fagus sylvatica sp.), — birch (Betula sp.), — maple (Acer sp.), — fir (Abies sp.), — spruce (Picea sp.), and — maritime pine (Pinus pinaster sp.).

  • Standard
    8 pages
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  • Standard
    8 pages
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This document specifies the characteristics, requirements and test methods of multi-layer parquet elements for internal use as flooring.

  • Standard
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This document specifies the requirements for cork floor coverings made from agglomerated composition cork, with or without a decorative surface layer, with or without applied colours, supplied in tile form which are designed to be used with a factory finish and/or an in situ finish.
The cork floor decorative surface layer can be made of cork or other bio-based decorative materials, e.g. wood or bamboo veneers, linoleum, leather or natural fibres.
This document includes a classification system based on intensity of use which shows where cork floor tiles with a factory finish can give satisfactory service (see EN ISO 10874). It also specifies requirements for marking, labelling and packing.

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This document specifies the requirements for cork floor coverings made from agglomerated composition cork, with or without a decorative surface layer, with or without applied colours, supplied in tile form which are designed to be used with a factory finish and/or an in situ finish.
The cork floor decorative surface layer can be made of cork or other bio-based decorative materials, e.g. wood or bamboo veneers, linoleum, leather or natural fibres.
This document includes a classification system based on intensity of use which shows where cork floor tiles with a factory finish can give satisfactory service (see EN ISO 10874). It also specifies requirements for marking, labelling and packing.

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This document specifies a test method to determine the resistance of the surface of an element of wood flooring, panelling and cladding, to a predetermined list of chemical agents they may be exposed to during their service life.

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This European Standard describes a method for assessing the resistance of wood-based panel products to attack by wood-destroying basidiomycete fungi growing in pure culture.
The method is applicable to uncoated, rigid wood-based panel products. It is applicable to the determination of the decay resistance of wood-based panel products:
— made from naturally durable materials;
— made from materials treated with preservatives prior to manufacture;
— treated with a preservative which is introduced during manufacture, for example as an additive to the adhesive;
— treated with preservative after manufacture.
NOTE 1 This method can be used in conjunction with an appropriate ageing procedure, for example EN 73 or EN 84.
NOTE 2 Wood-based panel products that have received a preservative treatment after manufacture can be susceptible to attack through the cut edges of the test specimens and the decay resistance indicated can be less than that of complete panels used in service.
Annex A (informative) contains a guidance on sampling.
Annex B (normative) contains some methods of sterilization.
Annex C (informative) contains information on the culture vessels.
Annex D (informative) contains an example of a test report.
Annex E (informative) contains information on the test fungi.

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This document gives guidance on the selection of wood of wood and wood based products for use in situations where they may be subject to degradation by fungi or wood destroying insects. This guidance includes information on factors that can influence the service life of a wood or wood-based product when considering biological degradation. This document is a step toward the evaluation of the service life of a wood product.
This document does not consider:
1)   the durability characteristics of the glue used in wood-based products;
2)   the aesthetic function of wood products (discoloration, surface weathering, mould).

  • Standard
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This part of the EN 351 series establishes a classification of preservative-treated wood in terms of preservative penetration and gives guidance on a classification of retention. These can be used as a basis for specifying preservative treatments for particular products.
This part of the EN 351 series defines 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 the EN 351 series is applicable to the production of preservative-treated solid wood, including glued laminated timber, suitable for use in those service conditions defined within the use classes in EN 335. It does not apply to any subsequent examination of treated wood in service.
NOTE 1   Glued laminated timber is not suitable for use in fresh or sea water.
This part of the EN 351 series is applicable to the protection of wood against attack by wood-destroying and wood-disfiguring fungi, insects and marine organisms.
NOTE 2   Protection against wood-disfiguring fungi is an optional property verified by testing in accordance with EN 599-1.
This part of the EN 351 series 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 the EN 351 series 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 (informative) provides a decision process for specifying preservative treatment requirements.
Annex B (informative) gives an example of the marking system.

  • Standard
    17 pages
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This part of the EN 351 series gives guidance for the general procedures to be used in obtaining samples of preservative-treated wood for the determination of penetration and retention of wood preservative. It also gives guidance on the measurement of penetration and retention of a wood preservative in the treated wood.
This part of the EN 351 series is applicable to the production of preservative-treated solid wood, including glued laminated timber, suitable for use in those service conditions defined within the use classes in EN 335.
NOTE   Glued laminated timber is not suitable for use in fresh or sea water.
This part of the EN 351 series is not applicable to preservative-treated wood in service. However, the sampling guidance provided within this part of the EN 351 series can be applied for the subsequent examination of treated wood in service.
Annex A (informative) provides a selection of number of sample units.
Annex B (informative) provides examples of retention measurements.

  • Standard
    20 pages
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This document specifies a test method to determine the resistance of the surface of an element of wood flooring, panelling and cladding, to a predetermined list of chemical agents they may be exposed to during their service life.

  • Standard
    13 pages
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This document gives guidance on the selection of wood and wood-based products for use in situations where they can be subject to degradation by fungi, wood destroying insects or marine borers. This guidance includes information on factors that can influence the service life of a wood or wood-based product when considering biological degradation. In many end uses, design, workmanship and maintenance will also influence the service life of the wood or wood-based product.
This document is a step toward the evaluation of the service life of a wood product.
This document does not consider:
1)   the durability characteristics of the glue used in wood-based products;
2)   the aesthetic function of wood products (discoloration, surface weathering, mould).

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This document specifies a laboratory method for the determination of the treatability of wood in order to determine the likely reaction of different wood species to impregnation with wood preservatives. It is also applicable to investigate variation between samples of the same species but of different origin.

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This document describes a method for assessing the durability of wood-based panels or analogue wood products to attack by wood-destroying basidiomycete fungi growing in pure culture.
The test method described in this document is intended to complement EN 113-2 with focus on specific aspects of wood-based panels or analogue wood products. This document is not intended to determine the effectiveness of wood preservatives used to prevent decay, which is covered by EN 113-1.
NOTE   This method can be used in conjunction with an appropriate ageing procedure, for example EN 73 or EN 84.
The method is applicable to uncoated, rigid wood-based panel products. It is applicable to the determination of the decay resistance of wood-based panel products:
-   made from naturally durable materials;
-   made from materials treated with preservatives prior to manufacture;
-   treated with a preservative which is introduced during manufacture, for example as an additive to the adhesive;
-   specific treatments to increase durability of wood-based panels, e.g. wood modification.
Annex A (informative) contains a guidance on sampling.
Annex B (normative) contains some methods of sterilization.
Annex C (informative) contains information on the culture vessels.
Annex D (informative) contains an example of a test report.
Annex E (informative) contains information on the test fungi.
Annex F (informative) contains the assessment of the results.
Annex G (informative) contains extra info on moisture dynamics, coatings, composites and impact of dimensions.

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This document provides information on the characteristic values for use in designing structures incorporating wood-based panels. The characteristic values given are as defined in EN 1995-1-1.
This document includes the characteristic values of the mechanical properties and of the raw density for solid-wood panels complying with EN 13353:2022 technical classes SWP/1 S, SWP/2 S, SWP/3 S.

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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.

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This document specifies a laboratory method for the determination of the treatability of wood in order to determine the likely reaction of different wood species to impregnation with wood preservatives. It is also applicable to investigate variation between samples of the same species but of different origin.

  • Corrigendum
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This European Standard gives a method for determining characteristic values of mechanical properties and density, for defined populations of visual grades and/or strength classes of machine graded structural timber. Additionally it covers the stages of sampling, testing, analysis and presentation of the data.
The standard provides methods to derive strength, stiffness and density properties for structural timber from tests with defect-free specimen.
The values determined in accordance with this standard for mechanical properties and density are suitable for assigning grades and species to the strength classes of EN 338.
NOTE 1   For assigning grades and species to the strength classes in EN 338 only three properties, i.e. bending or tension strength, modulus of elasticity parallel to grain in bending or tension and density need to be determined from test data, other properties can be calculated according to Table 2.
NOTE 2   EN 1912 gives examples of established visual grades assigned to strength classes.

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This document specifies a laboratory method for the determination of the treatability of wood in order to determine the likely reaction of different wood species to impregnation with wood preservatives. It is also applicable to investigate variation between samples of the same species but of different origin.

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This document specifies requirements, additional to those of EN 14081-1, for type testing of machine graded structural timber with rectangular cross-sections shaped by sawing, planning or other methods, and having deviations from the target sizes corresponding to EN 336. This includes requirements for strength grading machines.

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This document sets out provisions regarding the performance of characteristics of the following Types of cross laminated timber for use in buildings and bridges:
- Type 1: Straight or curved cross laminated timber comprising only timber layers but no large finger joints;
- Type 2: Straight cross laminated timber comprising only timber layers and large finger joints;
- Type 3: Straight cross laminated timber comprising timber and wood-based panel layers but no large finger joints.
This document covers cross laminated timber of all three Types of cross laminated timber:
- manufactured according to this document, which sets up provisions for:
- boundary conditions during manufacture of cross laminated timber;
- moisture content and temperature of timber to be bonded;
- production of finger joints and bonds between layers;
- to be used in service class 1 or 2 according to EN 1995-1-1;
- made of coniferous species and poplar listed in this document;
- which may be made of layers made of different species;
- bonded with phenolic or aminoplastic or moisture curing one-component polyurethane or emulsion polymer isocyanate adhesives of adhesive Type I according to the respective standard;
- made of timber laminations having a nominal width between 40 mm (including) and 300 mm (including);
- built up of at least three orthogonally bonded layers (at least two of them timber layers);
- which may have, depending on the number of layers, adjacent layers bonded parallel to the grain;
- made of timber layers which are made of strength graded timber according to EN 14081-1;
-made of timber layers having nominal thicknesses between 6 mm (including) and 47 mm (including);
- made of timber layers which may comprise edge bonds;
- having nominal overall thicknesses up to 500 mm.
Additional provisions of this document apply for straight cross laminated timber comprising only timber layers and comprising large finger joints (Type 2):
- made from cross laminated timber pieces having the same cross-section and layup;
- made from cross laminated timber pieces having nominal cross-sectional thicknesses from 51 mm (including) up to 345 mm (including) and nominal minimum thicknesses of the outer layers not less than 17 mm (including);
- made from cross laminated timber pieces solely comprising timber layers;
- made from plane cross laminated timber pieces;
- with parallel x-axes of the jointed components;
- with large finger joints having a finger length of at least 45 mm and fingers which are visible at the two narrow sides of the components;
- having large finger joints bonded with phenolic or aminoplastic or moisture curing one-component polyurethane adhesives of adhesive Type I according to the respective standard.
Additional provisions of this document apply for straight cross laminated timber comprising timber and wood-based panel layers but no large finger joints (Type 3):
- made of structural wood-based panels specified in this document;
- made of one panel per layer and;
- having thicknesses between 6 mm (including) and 45 mm (including).
This document applies to cross laminated timber untreated or treated against biological attack.
This document does not cover:
- cross laminated timber treated with fire retardants;
- cross laminated timber which is produced from re-used timber or wood-based panels comprising re-used timber.
It also lays down procedures for assessment and verification of constancy of performance (AVPC) of cross laminated timber.

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This document specifies requirements additional to those given in EN 14081 1 for factory production control of machine graded structural timber with rectangular cross-sections shaped by sawing, planing or other methods, and having deviations from the target sizes corresponding to EN 336.

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This document describes a laboratory method for the determination of the treatability of wood in order to determine the likely reaction of different wood species to impregnation with wood preservatives. It can also be used to investigate variation between samples of the same species but of different origin.

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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.

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This document provides information on the characteristic values for use in designing structures incorporating wood-based panels. The characteristic values given are as defined in EN 1995-1-1.
This document includes the characteristic values of the mechanical properties and of the raw density for solid-wood panels complying with prEN 13353:2021 technical classes SWP/1 S, SWP/2 S, SWP/3 S.

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This document specifies requirements, additional to those of EN 14081-1, for type testing of machine graded structural timber with rectangular cross-sections shaped by sawing, planning or other methods, and having deviations from the target sizes corresponding to EN 336. This includes requirements for strength grading machines.

  • Standard
    36 pages
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This European Standard gives a method for determining characteristic values of mechanical properties and density, for defined populations of visual grades and/or strength classes of machine graded structural timber. Additionally it covers the stages of sampling, testing, analysis and presentation of the data.
The standard provides methods to derive strength, stiffness and density properties for structural timber from tests with defect-free specimen.
The values determined in accordance with this standard for mechanical properties and density are suitable for assigning grades and species to the strength classes of EN 338.
NOTE 1   For assigning grades and species to the strength classes in EN 338 only three properties, i.e. bending or tension strength, modulus of elasticity parallel to grain in bending or tension and density need to be determined from test data, other properties can be calculated according to Table 2.
NOTE 2   EN 1912 gives examples of established visual grades assigned to strength classes.

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This document defines terms relating to technological operations in the logging industry. NOTE See ISO 6814 for terms and definitions related to mobile and self-propelled machinery used in forestry.

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  • Standard
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This document gives guidelines and requirements to sort and classify rattan cane materials (poles and derivatives) based on physical properties, quality and market values.

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    8 pages
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This document specifies a method for determining the ultimate strength in shearing parallel to grain of small clear wood specimens by measuring the breaking load applied statically along the radial or the tangential plane of a test piece.

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  • Standard
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This document gives the safety requirements and measures for numerically controlled (NC/CNC) boring machines, NC/CNC routing machines and NC/CNC boring and routing machines (as defined in 3.2, 3.3 and 3.4), capable of continuous production use, hereinafter referred to as "machines".
This document deals with all significant hazards, hazardous situations and events, listed in Annex A, relevant to the machines when they are operated, adjusted and maintained as intended and under the conditions foreseen by the manufacturer including reasonably foreseeable misuse. Also, transport, assembly, dismantling, disabling and scrapping phases have been taken into account.
This document is also applicable to machines fitted with one or more of the following devices/additional working units, whose hazards have been dealt with:
—    additional working units for sawing, sanding, assembling or dowel inserting;
—    fixed or movable workpiece support;
—    mechanical, pneumatic, hydraulic or vacuum workpiece clamping;
—    automatic tool change devices.
It is also applicable to machines fitted with edge-banding equipment, even if the relevant specific hazards have not been dealt with.
NOTE      For the risk assessment needed for the edge-banding equipment, ISO 19085-17 can be useful.
Machines covered in this document are designed for workpieces consisting of:
—    solid wood;
—    material with similar physical characteristics to wood (see ISO 19085-1:2021, 3.2);
—    gypsum boards, gypsum bounded fibreboards, cardboard;
—    matrix engineered mineral boards, silicate boards;
—    composite materials with core consisting of polyurethane or mineral material laminated with light alloy;
—    polymer-matrix composite materials and reinforced thermoplastic/thermoset/elastomeric materials;
—    aluminium light alloy profiles;
—    aluminium light alloy plates with a maximum thickness of 10 mm;
—    composite boards made from the materials listed above.
This document does not deal with specific hazards related to:
—    use of grinding wheels;
—    ejection through openings guarded by curtains on machines where the height of the opening in the enclosure above the workpiece support exceeds 700 mm;
—    ejection due to failure of milling tools with a cutting circle diameter equal to or greater than 16 mm and sawing tools not conforming to EN 847‑1:2017 and EN 847‑2:2017;
—    the combination of a single machine being used with other machines (as a part of a line);
—    integrated workpiece loading/unloading systems (e.g. robots).
This document is not applicable to:
—    single spindle hand fed or integrated fed routing machines;
—    machines intended for use in potentially explosive atmosphere;
—    machines manufactured prior to its publication.

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