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BS EN 12037:2022 – TC

BS EN 12037:2022 – TC

$186.33

Tracked Changes. Wood preservatives. Field test method for determining the relative protective effectiveness of a wood preservative exposed out of ground contact. Horizontal lap-joint method

Published By Publication Date Number of Pages
BSI 2022 76
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This document specifies a test method 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 materials. NOTE 1 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. Guidance on samples and sampling of naturally durable wood and modified wood is found in EN 350. 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.

PDF Catalog

PDF Pages PDF Title
1 30467236
45 A-30421072
46 undefined
52 1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
53 3.2 Symbols
54 4 Principle
5 Materials
5.1 Test specimens
5.1.1 Wood species
5.1.2 Wood quality
5.1.3 Provisions of test specimens
55 5.1.4 Dimensions and density of test specimens
5.1.5 Number of lap-joints
56 5.1.6 Labelling of lap-joints
5.2 End-seal compounds
6 Apparatus and equipment
58 7 Sample of wood preservative
8 Test lap-joints
8.1 Initial end sealing
8.2 Treating process
8.3 Retention of preservative
59 8.4 Post-treatment handling of the test lap-joints
8.4.1 Conditioning
8.4.2 Final end sealing (prior to exposure)
8.4.3 Labelling
8.4.4 Assembling lap-joints
9 Untreated control lap-joints
10 Exposure test site
10.1 Selection of test site
10.2 Installation of the lap-joints at the test site
60 11 Inspection
12 Assessment
61 13 Duration of the test
14 Validity of test
15 Test report
63 Annex A (informative)Information on an additional test with a reference preservative and on treatment processes
A.1 Additional test with a reference preservative
A.1.1 General
A.1.2 Reference preservative
A.1.3 Additional reference preservative 1
A.1.4 Additional reference preservative 2
64 A.1.5 Tolerances of variation
A.1.6 Reference lap-joint
A.1.6.1 General
A.1.6.2 Initial end sealing
A.1.6.3 Treating process
65 A.1.6.4 Retention of reference preservative
A.1.6.5 Post-treatment handling of the reference lap joints
A.1.6.6 Exposure
A.1.6.7 Inspections
A.1.6.8 Assessment and duration of test
A.2 Model treatments methods
A.2.1 General
A.2.2 Brushing
A.2.3 Spraying in a spray tunnel
A.2.4 Dip process
A.2.5 Steeping
66 A.2.6 Double vacuum process
A.2.7 Full-cell process
67 Annex B (informative)Example of a test report
73 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
C.1 General
C.2 Assessment
74 Annex D (informative)Test field site

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BS EN 12037:2022 - TC
$186.33