Treteknikk

Komité: CEN/TC 124 (Timber structures)
Opprinnelse:
Sluttdato: 9. jan 2020
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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.
Komité: CEN/TC 124 (Timber structures)
Opprinnelse:
Sluttdato: 9. jan 2020
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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.
Komité: CEN/TC 124 (Timber structures)
Opprinnelse:
Sluttdato: 9. jan 2020
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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.
Komité: CEN/TC 175 (Round and sawn timber)
Opprinnelse:
Sluttdato: 9. jan 2020
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This document specifies a test method to determine the top layer delamination of multilayer parquet elements according to EN 13489 with different structures, dimensions and adhesives for internal use as flooring, at the time of the first delivery of the product. The document specifies 2 pre-treatments (PT1 and PT2) of the test specimens. The test methods described in this document allow to determine the minimum top layer bonding quality, also for the use application on floor heating, and for the identification of bonding failure. NOTE 1 For this application, the pre-treatments have proven to be suitable. This document does not apply to the bonding quality of plywood if it is in use in the multilayer parquet construction. NOTE 2 This standard doesn’t allow to estimate the compatibility of use in wet conditions.
Komité: CEN/TC 175 (Round and sawn timber)
Opprinnelse:
Sluttdato: 16. jan 2020
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This document specifies methods of measuring the geometrical characteristics of wood flooring and wood panelling and cladding elements. This document does not specify sampling, which is intended to be found in the product standards or test methods and it does not apply to elements which are installed.
Komité: CEN/TC 127 (Fire safety in buildings)
Opprinnelse:
Sluttdato: 6. feb 2020
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This document specifies a test method for determining the ability of a horizontal protective membrane, when used as a fire resistant barrier, to contribute to the fire resistance of standard horizontal structural building members as defined in 6.4.2. Test of horizontal protective membrane installed under a specific non-standard floor should be tested according to EN 1365-2. This document contains the fire test which specifies the tests which are carried out whereby the horizontal protective membrane, together with the structural member to be protected, is exposed to a fire test according to the procedures defined herein. The fire exposure, to the temperature/time curve given in EN 1363-1, is applied from below the membrane itself. The test method makes provision, through specified optional additional procedures, for the collection of data which can be used as direct input to the calculation of fire resistance according to the processes given within EN 1992-1-2, EN 1993-1-2, EN 1994-1-2 and EN 1995-1-2. This document also contains the assessment which provides information relative to the analysis of the test data and gives guidance for the interpretation of the results of the fire test, in terms of loadbearing capacity criteria of the protected horizontal structural member. In special circumstances, where specified in national building regulations, there can be a need to subject the protection material to a smouldering curve. The test for this and the special circumstances for its use are detailed in Annex C. The limits of applicability of the results of the assessment arising from the fire test are defined, together with permitted direct application of the results to different structures, membranes and fittings. This documentapplies only where there is a gap and a cavity between the horizontal protective membrane and the structural building member. Otherwise, the test methods in EN 13381-3, EN 13381 4 or EN 13381-5, as appropriate, apply. Tests are intended to be carried out without additional combustible materials in the cavity. Annex A gives details of assessing the performance of the ceiling when exposed to a semi-natural fire.