CEN/TS 12037:2003
(Main)Wood preservatives - Field test method for determining the relative protective effectiveness of a wood preservative exposed out of ground contact - Horizontal lap-joint method
Wood preservatives - Field test method for determining the relative protective effectiveness of a wood preservative exposed out of ground contact - Horizontal lap-joint method
This Technical Specification describes a method of test for wood preservatives that are intended for use in wood to be exposed to the weather out of contact with the ground without the additional protection of a surface coating.
The method is applicable to the testing of commercial or experimental preservatives applied by techniques appropriate to commercial practice. The method is applicable to chemical products used individually or in combination to prevent the development of decay and/or - optional - the development of disfiguring organisms in wood and, where suitable, in wood-based products.
NOTE The method can also be used to test other treated wood species and naturally durable timbers. It can be adapted for testing the field performance of other wood based systems and treatments designed to enhance durability, for example treated or untreated wood based composites, timber treated with non-biocidal systems, chemically modified or heat treated timber.
Although the test is used to assess decay, it is possible to use the method to additionally assess stain or each separately when relevant.
Holzschutzmittel - Freilandversuche zur Bestimmung der relativen Schutzwirkung eines Holzschutzmittels ohne Erdkontakt - Verfahren mit horizontaler Überplattung (Lap-joint)
Die vorliegende Technische Spezifikation beschreibt ein Verfahren zur Prüfung von Holzschutzmitteln, die für die Behandlung von Holz vorgesehen sind, das ohne Erdkontakt und ohne zusätzlichen Schutz durch eine Oberflächenbeschichtung der Witterung ausgesetzt werden soll.
Das Verfahren ist für die Prüfung kommerzieller oder experimenteller Holzschutzmittel anwendbar, die mit für die kommerzielle Praxis geeigneten Verfahrensweisen auf-/eingebracht werden. Das Verfahren ist auf chemische Erzeugnisse anwendbar, die einzeln oder in Kombination verwendet werden, um die Entwicklung von Fäulnis in Holz und/oder - wahlweise - die Entwicklung von verfärbenden Organismen in Holz und, falls zutreffend, in Holzprodukten, zu verhindern.
ANMERKUNG 1 Das Verfahren darf auch zur Prüfung von anderen behandelten Holzarten und natürlich dauerhaften Nutzhölzern angewendet werden. Es darf zur Prüfung der Gebrauchstauglichkeit im Freiland von anderen Systemen auf der Grundlage von Holz und von Behandlungsverfahren angewendet werden, die dafür ausgelegt sind, die Dauerhaftigkeit zu erhöhen, z. B. bei behandelten oder unbehandelten Holzverbundwerkstoffen, Nutzholz, das mit biozidfreien Systemen behandelt wurde, und chemisch modifiziertem oder wärmebehandeltem Nutzholz.
ANMERKUNG 2 Obwohl die Prüfung für die Bewertung der Fäulnis angewendet wird, kann dieses Verfahren, falls zutreffend, zur zusätzlichen Bewertung der Verfärbung oder zur separaten Bewertung von Fäulnis und Verfärbung eingesetzt werden.
Produits de préservation du bois - Essais de champ pour déterminer l'efficacité protectrice d'un produit de préservation du bois hors de contact avec le sol - Méthode avec un assemblage à joint superposé
La présente Spécification technique européenne décrit une méthode d'essai de produits de préservation du bois destinés au bois exposé aux intempéries hors de contact avec le sol sans application ultérieure d'un revêtement de surface.
La méthode est applicable à l'essai des produits de préservation commerciaux ou expérimentaux appliqués par des techniques appropriées utilisées dans la pratique. La méthode s'applique aux produits chimiques utilisés individuellement ou en combinaison pour empêcher le développement de pourriture et/ou - en option - d'organismes de discoloration dans le bois et, si adapté, dans les matériaux dérivés du bois.
NOTE 1 La méthode peut aussi être utilisée pour essayer d'autres essences de bois traités ou bien des bois naturellement durables. Elle peut être adaptée pour essayer à l'extérieur les performances d'autres systèmes à base de bois et des traitements destinés à accroître la durabilité, par exemple des composites à base de bois traités ou non traités, des bois traités avec des systèmes non-biocides, des bois modifiés chimiquement ou traités à la chaleur.
NOTE 2 Bien que l'essai soit destiné à évaluer la pourriture, il est possible d'utiliser la méthode pour évaluer en plus la discoloration, ou alors chacune séparément si pertinent.
Zaščitna sredstva za les - Terenska preskusna metoda za ugotavljanje relativne preventivne učinkovitosti zaščitnega sredstva za les izven stika z zemljo
General Information
- Status
- Withdrawn
- Publication Date
- 16-Dec-2003
- Withdrawal Date
- 13-Apr-2025
- Technical Committee
- CEN/TC 38 - Durability of wood and derived materials
- Drafting Committee
- CEN/TC 38 - Durability of wood and derived materials
- Current Stage
- 9960 - Withdrawal effective - Withdrawal
- Start Date
- 30-Nov-2022
- Completion Date
- 14-Apr-2025
- Directive
- 89/106/EEC - Construction products
Relations
- Effective Date
- 22-Dec-2008
- Effective Date
- 07-Dec-2022
Frequently Asked Questions
CEN/TS 12037:2003 is a technical specification published by the European Committee for Standardization (CEN). Its full title is "Wood preservatives - Field test method for determining the relative protective effectiveness of a wood preservative exposed out of ground contact - Horizontal lap-joint method". This standard covers: This Technical Specification describes a method of test for wood preservatives that are intended for use in wood to be exposed to the weather out of contact with the ground without the additional protection of a surface coating. The method is applicable to the testing of commercial or experimental preservatives applied by techniques appropriate to commercial practice. The method is applicable to chemical products used individually or in combination to prevent the development of decay and/or - optional - the development of disfiguring organisms in wood and, where suitable, in wood-based products. NOTE The method can also be used to test other treated wood species and naturally durable timbers. It can be adapted for testing the field performance of other wood based systems and treatments designed to enhance durability, for example treated or untreated wood based composites, timber treated with non-biocidal systems, chemically modified or heat treated timber. Although the test is used to assess decay, it is possible to use the method to additionally assess stain or each separately when relevant.
This Technical Specification describes a method of test for wood preservatives that are intended for use in wood to be exposed to the weather out of contact with the ground without the additional protection of a surface coating. The method is applicable to the testing of commercial or experimental preservatives applied by techniques appropriate to commercial practice. The method is applicable to chemical products used individually or in combination to prevent the development of decay and/or - optional - the development of disfiguring organisms in wood and, where suitable, in wood-based products. NOTE The method can also be used to test other treated wood species and naturally durable timbers. It can be adapted for testing the field performance of other wood based systems and treatments designed to enhance durability, for example treated or untreated wood based composites, timber treated with non-biocidal systems, chemically modified or heat treated timber. Although the test is used to assess decay, it is possible to use the method to additionally assess stain or each separately when relevant.
CEN/TS 12037:2003 is classified under the following ICS (International Classification for Standards) categories: 71.100.50 - Wood-protecting chemicals. The ICS classification helps identify the subject area and facilitates finding related standards.
CEN/TS 12037:2003 has the following relationships with other standards: It is inter standard links to ENV 12037:1996, EN 12037:2022. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
CEN/TS 12037:2003 is associated with the following European legislation: EU Directives/Regulations: 305/2011, 89/106/EEC. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
You can purchase CEN/TS 12037:2003 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2005
1DGRPHãþD
SIST-TS ENV 12037:2004
=DãþLWQDVUHGVWYD]DOHV7HUHQVNDSUHVNXVQDPHWRGD]DXJRWDYOMDQMHUHODWLYQH
SUHYHQWLYQHXþLQNRYLWRVWL]DãþLWQHJDVUHGVWYD]DOHVL]YHQVWLND]]HPOMR
Wood preservatives - Field test method for determining the relative protective
effectiveness of a wood preservative exposed out of ground contact - Horizontal lap-joint
method
Holzschutzmittel - Freilandversuche zur Bestimmung der relativen Schutzwirkung eines
Holzschutzmittels ohne Erdkontakt - Verfahren mit horizontaler Überplattung (Lap-joint)
Produits de préservation du bois - Essais de champ pour déterminer l'efficacité
protectrice d'un produit de préservation du bois hors de contact avec le sol - Méthode
avec un assemblage a joint superposé
Ta slovenski standard je istoveten z: CEN/TS 12037:2003
ICS:
71.100.50 .HPLNDOLMH]D]DãþLWROHVD Wood-protecting chemicals
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
TECHNICAL SPECIFICATION
CEN/TS 12037
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
December 2003
ICS 71.100.50 Superscedes ENV 12037:1996
English version
Wood preservatives – Field test method for determining the
relative protective effectiveness of a wood preservative exposed
out of ground contact – Horizontal lap-joint method
Produits de préservation du bois – Essais de champ pour Holzschutzmittel – Freilandversuche zur Bestimmung der
déterminer l’efficacité protectrice d’un produit de relativen Wirksamkeit eines Holzschutzmittels ohne
préservation du bois hors de contact avec le sol – Méthode Erdkontakt – Verfahren mit horizontaler Überlappung (Lap-
avec un assemblage à joint superposé joint)
This Technical Specification (CEN/TS) was approved by CEN on 8 October 2003 for provisional application.
The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their
comments, particularly on the question whether the CEN/TS can be converted into a European Standard.
CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available. It
is permissible to keep conflicting national standards in force (in parallel to the CEN/TS) until the final decision about the possible
conversion of the CEN/TS into an EN is reached.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 12037:2003 E
worldwide for CEN national Members.
Page
Contents
1 Scope .5
2 Normative reference.5
3 Definitions, symbols and abbreviations.5
4 Principle.6
5 Materials .7
6 Apparatus and equipment .9
7 Sample of preservative .11
8 Test lap-joints .11
9 Untreated control lap-joints.13
10 Exposure test site.13
11 Inspections.13
12 Assessment.13
13 Duration of the test.14
14 Validity of test .14
15 Test report .15
Annex A (informative) Information on an additional test with a reference preservative and
on treatment processes .17
Annex B (informative) Example of a test report.21
Annex C (informative) Determination of the preventive efficacy of a test preservative or
components of a test preservative against staining fungi using horizontal lap-joint
method.27
Annex D (informative) Test field site .29
Bibliography.30
Foreword
This document (CEN/TS 12037:2003) 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 supersedes ENV 12037:1996.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to announce this Technical Specification: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Hungary Iceland, Ireland, Italy, Luxembourg,
Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom.
Introduction
The main objective of the method is to evaluate the relative effectiveness of the preservative, applied
to jointed specimens of Scots pine sapwood by a treatment method relevant to its intended practical
use and as such does not necessarily accelerate decay but reflects probable performance in service.
The method is concerned with the protection against decay after exposure to a wide range of micro-
organisms occurring out of ground contact under natural conditions. It takes into account also physico-
chemical effects of weathering on the performance of the preservative treated wood.
Since the lap-joints are exposed to natural outdoor conditions during the test period, variations in test
conditions from one exposure site to another have to be expected. Differences in climate, especially
rainfall, will inevitably influence the general rate of development of decay fungi. However, by
comparing the results obtained for the test preservative with those obtained for untreated control lap-
joints, the relative protective effectiveness of the preservative under test can be evaluated.
NOTE The procedures described in this Technical Specification are intended to be carried out by suitably
trained and/or supervised specialists. Appropriate safety precautions should be observed throughout the use of
the Technical Specification.
1 Scope
This Technical Specification describes a method of test for wood preservatives that are intended for
use in wood to be exposed to the weather out of contact with the ground without the additional
protection of a surface coating.
The method is applicable to the testing of commercial or experimental preservatives applied by
techniques appropriate to commercial practice. The method is applicable to chemical products used
individually or in combination to prevent the development of decay and/or – optional – the
development of disfiguring organisms in wood and, where suitable, in wood-based products.
NOTE 1 The method may also be used to test other treated wood species and naturally durable timbers. It
may be adapted for testing the field performance of other wood based systems and treatments designed to
enhance durability, for example treated or untreated wood based composites, timber treated with non-biocidal
systems, chemically modified or heat treated timber.
NOTE 2 Although the test is used to assess decay, it is possible to use the method to additionally assess stain
or each separately when relevant.
2 Normative reference
This Technical Specification incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this Technical Specification only when incorporated in it by amendment
or revision. For undated references the latest edition of the publication referred to applies (including
amendments).
EN 212, Wood preservatives — Guide to sampling and preparation for analysis of wood preservatives
and treated timber.
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of this Technical Specification, the following definitions, symbols and abbreviations
apply :
3.1.1
active ingredient(s)
individual chemical compound or compounds included in the wood preservative product to give it
specific activity against the particular biological agencies of deterioration
3.1.2
additional process
any process or application of a product, as defined by the supplier, designed to improve the
effectiveness of the preservative
3.1.3
penetrating treatment process
process which includes features or procedures intended to overcome the natural resistance of wood to
penetration by a wood preservative product in its ready for use form
NOTE Such processes include for example currently practised technologies of diffusion treatments, double-
vacuum and vacuum-pressure methods.
3.1.4
superficial application process
process which does not include particular features or procedures intended to overcome the natural
resistance of wood to penetration by a wood preservative product in its ready for use form
NOTE Such processes include for example brush and spray techniques and short-term immersion (dipping)
processes in which wood normally has only a few minutes contact time with the preservative.
3.1.5
representative sample
sample having its physical or chemical characteristics identical with the volumetric average
characteristics of the total volume being sampled (see EN 212)
3.1.6
supplier
sponsor of the test
3.1.7
target retention
retention recommended by the supplier
3.1.8
application rate
amount of preservative product per square metre to be applied in superficial processes recommended
by the supplier
3.2 Symbols and abbreviations
3.2.1
nUD
V
nominal median rating for the upper side of the lap-joints for sets of replicates at the assessment of the
extent of decay
3.2.2
nLD
V
nominal median rating for the lower side of the lap-joints for sets of replicates at the assessment of the
extent of decay
3.2.3
nJD
V
nominal median rating for surfaces within the joint areas of the lap-joints for sets of replicates at the
assessment of the extent of decay
NOTE For symbols for the optional assessment of attack by staining fungi see Annex C.
4 Principle
Jointed specimens (lap-joints) consisting of two overlapping parts (joint members) held together
mechanically are placed horizontally, out of contact with the ground and exposed to the weather. The
lap-joints are dismantled and examined at intervals. The extent of microbiological attack on the
external surfaces and within the joint areas is rated according to a specified rating system. Data for
lap-joints treated with the test product are compared with those generated from untreated specimens
to assess relative effectiveness.
5 Materials
5.1 Test specimens
5.1.1 Wood species
The reference species is Scots pine (Pinus sylvestris Linnaeus)
NOTE Additional tests may be carried out using other species.
5.1.2 Quality of wood
The wood shall be free from visible cracks, stain, decay, insect damage and other defects. Some
knots are permitted. The wood shall not have been water-stored, floated, chemically treated or
steamed. The wood shall originate from trees preferably felled in winter.
NOTE Wood that has been kiln dried at temperatures below 60 °C may be used.
The Scots pine shall be exclusively sapwood containing little resin and having between 2,5 and 8
annual rings per 10 mm. The proportion of latewood in the annual rings shall not exceed 30 % of the
whole. Use wood without reaction wood or juvenile wood.
5.1.3 Provision of test specimens
The longitudinal faces shall be parallel to the direction of the grain. The annual rings shall have a
contact angle of not greater than 10 ° to the broad faces of the test specimens. Make transverse cuts,
neatly to give sharp edges and a fine-sawn finish to the end-grain surfaces.
All the wood used in the test shall have been handled and dried in the same way.
NOTE 1 If additional wood species are used, these should be mentioned in the test report together with their
density and the number of annual rings per 10 mm of the timber used for the test specimens.
Wood from at least three trees shall be used and evenly distributed among the different groups of lap-
joints.
Condition in a conditioning chamber (see 6.2) the timber stock to (12 ± 2) % (m/m) moisture content.
Prepare lengths of timber with (38 ± 1) mm · (85 ± 1) mm cross section by sawing (see 6.1) and
planning (see Figure 1). From the lap-joints subsequently machined from a single length of timber, not
more than one shall be included in each set of replicates (see 5.1.5).
NOTE 2 A moisture meter of the two-pronged electrical conductivity type is suitable for assessing moisture
content.
Each lap-joint shall be prepared from a single piece of wood as two members (180 ± 1) mm long and
separated by no more than 100 mm, to allow for removal of knots and associated grain aberration, to
ensure a tight fit during the test (see Figure 1). Within the overlapping part and the adjacent 50 mm
there shall be no knots and in the rest of each member there are no more than 3 sound knots, the
diameter of which shall not exceed 10 mm.
Machine the joint in a way that after assembly of the two members the pith faces are on the same side
of the assembled joint (see Figure 1).
Store the joint members in the conditioning chamber (6.2) until required for treating.
Dimensions in millimetres
Key
1 Cable strap
Figure 1 — Lap-joint
NOTE The lap-joint members are held together by two cable straps (6.7). The lap-joint is shown without the
weatherproof end seal.
5.1.4 Dimensions and density of test specimens
The dimensions of each lap-joint at (12 – 2) % (m/m) moisture content shall be (300 – 2) mm ·
(85 – 1) mm · (38 – 1) mm with an overlapping close fitting part at mid-length of (60 – 1) mm (see
Figure 1).
The wood shall have a density, at 12% (m/m) moisture content, in the range between 400 kg/m and
550 kg/m corresponding to a mass of each joint member ranging of about 190 g to 260 g.
In a batch of specimens to be treated, the density of an individual is permitted to differ from the mean
value of the batch by – 10 %. This tolerance is increased to – 20 % for the untreated specimens. The
mean density of the treated specimens used for the test shall be recorded in the test report.
5.1.5 Number of lap-joints
Prepare at least 10 lap-joints for each combination of test parameters [wood species (see 5.1.1), test
preservative (see clause 7), retention level or application rate (see 8.3), and untreated control (see
clause 10)].
NOTE It is normally necessary to treat a higher number of lap-joints so that the required number can be
selected after treatment (see 8.2) and the inclusion of "abnormal" joints avoided. Optionally extra lap-joints may
be prepared for chemical analyses during exposure.
5.1.6 Labelling of lap-joints
Individual members of each lap-joint shall be assigned unique identification numbers in such a way
that these numbers are retained through all preparation operations. After preservative treatment an
identification label or tag of long-Iasting material shall be affixed to the lower side of each lap-joint
away from the joint area. The labels shall be of a material which is inert to the wood and the chemicals
it contains after treatment and conditioning.
5.2 End-seal compounds
5.2.1 Preservative resistant end-seal : a material resistant to the penetration of the test preservative
solutions.
NOTE Polyvinyl acetate (PVAc) glues have been found to be suitable for many organic solvent formulations.
For water-borne formulations the weatherproof end-seal (5.2.2) may be used.
5.2.2 Weatherproof end-seal : a material which prevents water entry as well as microbial infection
and remains effective during long term exposure to the weather.
NOTE Two coats of an epoxy-resin/pitch compound have been found to be suitable.
6 Apparatus and equipment
6.1 Wood working equipment, including a saw capable of producing a fine sawn finish.
6.2 Conditioning chamber, well ventilated and controlled at (20 ± 2) °C and (65 ± 5) % relative
humidity.
6.3 Equipment, suitable for carrying out the treatment specified by the supplier.
6.4 Balance, capable of weighing to the nearest 0,1 g.
6.5 Safety equipment and protective clothing, appropriate for the test product, to ensure the
safety of the operator.
6.6 Labels and fixing pins, both long-lasting, inert (see 5.2.6) and corrosion resistant with similar
fixing pins.
6.7 Fixing material : cable straps, inert and weather resistant to be used for fixing the two
members of each joint together.
NOTE A suitable material of the straps is clear or white polyamide with a dimension of ca 360 mm 5 mm.·
These straps can easily be removed at the inspections and replaced by new straps when joints are returned to
the exposure racks.
Alternatively custom designed stainless steel metal clips may be used. A suitable clip design is shown
in Figure 2.
Figure 2 — Suitable clip fabricated out of stainless steel to hold lap-joint in place
NOTE Two clips are needed per test assembly.
6.8 Exposure rack, (see Figure 3) made of preservative treated wood, aluminium profiles or any
other similar durable material and located at least 1 m above ground level and at least 0,5 m above
any low vegetation (see Figure 3). The test specimens shall be separated from the rack by spacing
pieces, cross-section, minimum 5 mm · 5 mm, maximum 10 mm · 10 mm, made of a long-lasting
weather resistant material, that will not react with timber or treated lap-joints (see Figure 4).
Key
1Test samples
Figure 3 — Example of an exposure rack (6.8)
Figure 4 — Example of a suitable arrangement of lap-joints on a rack (6.8)
NOTE The samples shall be separated from each other by a minimum of 5 mm. Test samples shall also be
separated from the rack with a spacer manufactured from an inert, durable material with a cross section of a
minimum 5mm · 5mm to a maximum 10mm · 10mm.
7 Sample of preservative
The sample of preservative shall be representative of the product to be tested.
Samples shall be stored and handled in accordance with any written requirements from the supplier
including the product safety data sheet.
NOTE For the sampling of preservatives from bulk supplies, the procedures given in EN 212 should be used.
8 Test lap-joints
8.1 Initial end sealing
For each joint member, seal the end grain surface remote from the joint area twice with a preservative
resistant end seal (5.3.1) ; allow to dry.
8.2 Treating process
The preservative treatment is carried out after machining and initial end sealing but prior to
assembling.
Apply the test preservative to the end-sealed test joint members using the process specified by the
supplier.
NOTE 1 A range of model treatments is given in Annex A.
NOTE 2 When using a penetrating treatment for development products it is preferable to test at more than one
retention of the active ingredients, ideally three, ranged about that thought to be appropriate for out of ground
contact use. The concentration or target retention (X) may be achieved by varying the concentration of active
ingredient(s) in the formulation. Alternatively, the parameters of the treatment process can be altered. A suitable
range of retention could be 0,5 X, 1 X and 2 X. A narrower range can be used if the effectiveness of the product is
sufficiently well known, for example, a geometrical series with a factor of
treatment process it is preferable to test at more than one application rate of the active ingredients, ideally three,
ranged about that thought to be appropriate for out of ground contact use.
For all treatments except brushing, determine and record the volume of each of the lap-joint members
and its mass to the nearest 0,1 g immediately before treatment. After treatment allow to drain for
several minutes or wipe off excess solution from the surface with a cloth. Then reweigh each member
immediately and record the mass after treatment.
For brush treatment, calculate the amount of preservative in grams to be applied on each surface of
the lap-joint member to correspond to the uptake in grams or millilitres per square metre
recommended by the supplier.
NOTE 3 This can be done by putting the members on the balance one by one and brush them while lying
there, surface after surface with enough time in between for the preservative to be soaked up.
Apply double the calculated amount of preservative to the end grain surfaces of the joint area.
8.3 Retention of preservative
Calculate the uptake of preservative solution for each member and express the retention in kilograms
of preservative product as supplied for the test per cubic metre of wood for penetrating and/or vacuum
treatment processes and in grams per square metre (solid products or concentrates) or millilitres per
square metre (ready to use products) of wood surface for superficial application processes.
NOTE 1 For processes resulting in unknown penetration, retention should be expressed in both ways.
NOTE 2 Although long term immersion is considered as a penetrating process (see EN 599-1), normally the
penetration and the uptake of preservative solutions are relatively low. Therefore an expression of retention in
grams per square metre (solid products or concentrates) or millilitres per square metre (ready to use products) is
preferable.
Reject lap-joints where any member has a retention deviating by more than 15 % from the median and
substitute an appropriate alternative (see 5.1.5) which falls within this range. For superficial application
processes, report any deviation from the application rate calculated before treatment.
8.4 Post-treatment handling of the test lap-joints
8.4.1 Conditioning
The recommendations of the supplier shall be followed.
If no recommendations are given by the supplier, dry the treated lap-joint members in a well-ventilated
covered area protected from rain and frost. Ensure free ventilation by storing the members horizontally
on supporting rods of a material that does not react with the preservative, for example, glass for
organic solvent based preservatives.
8.4.2 Final end sealing (prior to exposure)
For each joint member, seal the end grain surface remote from the joint area with the weatherproof
end seal (5.3.2) and carry it over 2 mm to 3 mm onto the lateral surfaces to provide a complete seal. If
necessary remove the initial sealing.
8.4.3 Labelling
Fix permanent labels (6.6) to both of the members well away from the joint area.
8.4.4 Assembling lap-joints
Prior to exposure, fix together the two joint members of each lap-joint using two cable straps or two
stainless steel metal clips (6.7) (see Figure 1).
9 Untreated control lap-joints
A series of at least 10 untreated control lap-joints of Pinus sylvestris sapwood shall be installed at the
exposure site at the start of every experiment or group of experiments. The control lap-joints shall be
prepared, sealed, stored and handled in the same way as
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The CEN/TS 12037:2003 standard outlines a robust framework for evaluating the effectiveness of wood preservatives specifically intended for use in conditions where wood is exposed to the weather without ground contact, a scenario often encountered in practical applications. The scope of this Technical Specification encompasses the testing of both commercial and experimental preservatives, ensuring that manufacturers can validate the performance of their products under realistic conditions. One of the key strengths of this standard is its adaptability. It not only facilitates assessments of traditional chemical preservatives but also accommodates a variety of treatments, including combinations that prevent decay and control disfiguring organisms. This flexibility ensures that the method remains relevant in an evolving market where multiple wood preservation technologies, including innovative non-biocidal systems and modifications like heat treatment, are being developed. The horizontal lap-joint method described in the standard is particularly notable for its direct applicability to practical scenarios in the wood industry. By allowing the testing of various wood-based products and composites, the standard provides a comprehensive approach to evaluating protective effectiveness. Furthermore, the ability to assess not only decay but also stain development highlights the document's thoroughness, ensuring a holistic evaluation of wood preservatives under field conditions. In summary, the CEN/TS 12037:2003 standard is a significant resource for professionals in the wood preservation industry, encapsulating essential methodologies for testing the durability of wood preservatives. Its relevance is underscored by its broad applicability, adaptability to various treatments, and comprehensive testing capabilities, making it a critical reference point for ensuring the longevity and aesthetic quality of wood products exposed to outdoor environments.
Die CEN/TS 12037:2003 ist eine technische Spezifikation, die einen praxisnahen Prüfstandard für Holzschutzmittel darstellt, die dazu bestimmt sind, Holz im Freien ohne Bodenkontakt auszusetzen. Dabei dient die horizontale Überlappungs-Methode zur Bestimmung der relativen Schutzwirksamkeit solcher Produkte. Der Anwendungsbereich dieser Norm umfasst sowohl kommerzielle als auch experimentelle Holzschutzmittel, die mit Techniken aufgebracht werden, die der gängigen Praxis entsprechen. Ein wesentlicher Stärke der CEN/TS 12037:2003 liegt in der Vielseitigkeit der getesteten Produkte. Sie ist nicht nur auf chemische Produkte beschränkt, sondern erlaubt auch die Kombination verschiedener Holzschutzstoffe, um die Entwicklung von Fäulnis oder - optional - von unschönen Organismen zu verhindern. Dies macht die Norm besonders relevant für die Industrie, da sie eine umfassende Bewertung verschiedener Behandlungsansätze ermöglicht. Zusätzlich wird in der Norm erwähnt, dass die Methode auch auf andere behandelte Holzarten und von Natur aus haltbare Hölzer angewendet werden kann. Dies bedeutet, dass die CEN/TS 12037:2003 nicht nur auf die Prüfung traditioneller Holzschutzmittel beschränkt ist, sondern auch die Anpassung an andere holzbasierte Systeme sowie Behandlungen zur Verbesserung der Haltbarkeit zulässt. Beispielsweise können damit behandelte oder unbehandelte Holzwerkstoffe, chemisch modifiziertes oder wärmebehandeltes Holz getestet werden. Die Möglichkeit, die Methode sowohl zur Beurteilung von Fäulnis als auch zur separaten Bewertung von Tönung zu verwenden, wenn dies relevant ist, unterstreicht die Flexibilität des Standardisierungsdokuments. Diese Eigenschaften machen die CEN/TS 12037:2003 zu einem unverzichtbaren Instrument für Hersteller und Prüfinstitutionen, um die langfristige Leistungsfähigkeit und Schutzwirkung von Holzschutzmitteln unter realistischen Bedingungen zu evaluieren. Insgesamt bietet die CEN/TS 12037:2003 eine fundierte Grundlage für die Beurteilung der Schutzwirkung von Holzschutzmitteln und trägt somit wesentlich zur Verbesserung der Haltbarkeit und Qualität von Holzprodukten bei, die im Freien eingesetzt werden.
CEN/TS 12037:2003は、木材防腐剤の効果を評価するためのフィールドテスト方法を定めた技術仕様書です。この標準の範囲は、地面と接触しない状態で天候にさらされる木材に使用される防腐剤を対象とし、表面コーティングによる追加保護なしでの評価方法を提供します。 この標準の強みは、商業的または実験的な防腐剤を適用するための技術が含まれている点です。特に、商業実務に適した方法を採用しているため、実際の使用状況に即したテストが可能です。また、化学的製品が単独または組み合わせて使用されることにより、劣化や変色生物の発生を防ぐ能力を評価できることが、この標準の重要な特徴です。 加えて、この方法は、試験された防腐剤によって処理された木材種や自然耐久性の高い木材に対しても使用できるため、その適用範囲は広がります。さらに、木材に関連する他のシステムや処理のフィールドパフォーマンスを評価するために適応可能であり、ノンバイオシダルシステムで処理された木材や化学的に改質された木材、熱処理された木材などにも対応しています。 CEN/TS 12037:2003は、劣化の評価に加えて、必要に応じて変色の評価を行うことも可能であるため、木材の耐久性を向上させるためのさまざまなシステムや処理をテストする上での関連性が高いと言えます。このように、この標準は木材防腐剤の効果と耐久性の評価に対し、重要な基準を提供しています。
La norme CEN/TS 12037:2003 se positionne comme un document technique essentiel pour évaluer l'efficacité relative des préservatifs de bois exposés aux intempéries sans contact direct avec le sol. Son champ d'application est clairement défini, se consacrant à des méthodes de test pour les préservatifs destinés à la protection du bois. Il s’agit notamment de produits chimiques utilisés seuls ou en combinaison, visant à freiner le développement de la décomposition et, optionnellement, des organismes défigurants. L'une des forces majeures de cette norme réside dans sa capacité à être appliquée tant à des préservatifs commerciaux qu'expérimentaux, selon des techniques reconnues dans la pratique commerciale. Cela permet aux utilisateurs de s'assurer que les résultats obtenus sont en conformité avec les attentes du marché. En outre, la norme CEN/TS 12037:2003 permet d'élargir son application à d'autres types de bois traités et même à des essences naturellement durables, offrant ainsi une flexibilité indéniable dans les tests de performance sur le terrain. La possibilité d'adapter la méthode pour des systèmes basés sur le bois ou des traitements destinés à améliorer la durabilité, tels que les composites en bois traités ou non, le bois traité avec des systèmes non biocides, ou encore le bois modifié chimiquement ou traité à la chaleur, en fait un outil précieux pour les chercheurs et les professionnels du secteur. Enfin, cette norme ne se limite pas à l'évaluation de la décomposition, mais permet également d'évaluer les taches de manière séparée, ce qui est particulièrement pertinent selon les contextes d'utilisation. Ces caractéristiques renforcent la pertinence de la CEN/TS 12037:2003 dans le domaine des préservatifs de bois, en garantissant un niveau élevé de précision dans les tests effectués.
CEN/TS 12037:2003은 목재 방부제의 효과를 평가하기 위한 중요한 기술 사양서로, 특히 지면에 직접 닿지 않는 자연 환경에서 사용될 목재에 적합하도록 설계되었습니다. 이 표준은 목재의 외부 노출에 대한 방부제를 테스트하는 방법을 규명하고 있으며, 이는 목재 방부제가 필수적인 역할을 하는 분야에서 매우 유용합니다. 이 표준의 강점은 방부제의 상대적인 보호 효과를 평가하기 위해 정의된 수평 겹장 방법(Horizontal lap-joint method)을 통해 실험적 및 상업 용도의 방부제를 철저히 분석할 수 있다는 점입니다. 따라서, 상업적 실무에 적합한 적용 기술을 통해 실제 환경에서의 방부제 효과를 보다 정확하게 측정할 수 있습니다. 특히, 다양한 화학 제품의 사용이 허용되어 있는 이 표준은 단일 화학 제품이나 여러 제품의 조합을 통해 부패를 예방하는 기능을 평가할 수 있어 실용적입니다. 또한, CEN/TS 12037:2003은 시험 방법을 통해 자연 내구성이 있는 목재와 처리된 목재의 성능을 평가하는 데에도 적용할 수 있습니다. 이로 인해, 방부제뿐만 아니라, 내구성을 높이기 위한 다른 목재 기반 시스템 및 처리 방법에 대해서도 평가할 수 있는 유연성을 제공합니다. 이는 비생물학적 시스템으로 처리된 목재, 화학적으로 변형된 목재 또는 열 처리된 목재의 필드 성능을 검사하는 데에도 적합하다는 점에서 큰 장점을 가지고 있습니다. 문서의 범위는 방부제의 부패 방지 효과 뿐만 아니라 얼룩 발생 방지 효과도 추가적으로 평가할 수 있도록 구성되어 있어, 다양한 환경에서 사용되는 목재의 보호 성능에 대한 폭넓은 정보를 제공합니다. 이 표준은 목재 방부제의 평가에 있어 필수적인 기준으로 자리 잡고 있으며, 따라서 연구 및 산업계에서의 주요 참고 자료가 됩니다. 결론적으로, CEN/TS 12037:2003은 목재 방부제의 효과성을 체계적으로 규명한 표준으로서, 목재 산업에 중요한 기여를 하고 있음을 강조할 수 있습니다.
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