1、BRITISH STANDARDBS EN14951:2006Solid hardwood panelling and cladding Machined profiles elementsThe European Standard EN 14951:2006 has the status of a British StandardICS 79.060.99g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36
2、g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 14951:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2006 BSI 2006ISBN 0 580 49095 5National forewordThis British Standard is the official En
3、glish language version of EN 14951:2006. The UK participation in its preparation was entrusted to Technical Committee B/543, Round and sawn timber, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe B
4、ritish Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards
5、Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the respon
6、sible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the
7、 EN title page, pages 2 to 25 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14951March 2006ICS 79.060.99English VersionSolid h
8、ardwood panelling and cladding - Machined profileselementsLambris et bardages en bois massif feuillus - Lamesprofiles usinesInnen- und Auenbekleidungen aus massivem Laubholz -ProfilholzelementeThis European Standard was approved by CEN on 23 January 2006.CEN members are bound to comply with the CEN/
9、CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any
10、 CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN me
11、mbers are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerlan
12、d and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14951:
13、2006: EEN 14951:2006 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Symbols and abbreviations 6 5 Requirements.6 5.1 General6 5.2 Wood species.6 5.3 Appearance 6 5.3.1 General uses 6 5.3.2 Rules for the most commonly used species 7 5.3.3
14、 Free class .17 5.3.4 Natural colours.17 5.4 Moisture content17 5.5 Geometrical characteristics17 5.5.1 General17 5.5.2 Dimensional characteristics .17 5.5.3 Examples of profiles18 5.5.4 Nominal dimensions20 5.5.5 Permitted deviations from nominal dimensions of the element.20 5.5.6 Squareness and ot
15、her angular deviations 20 5.5.7 Machining .21 5.6 Technical specifications and properties .21 5.6.1 Specific site requirements 21 5.6.2 Appearance 21 6 Sampling.22 7 Marking .22 Annex A (normative) Principles for the classification of the free class23 Annex B (informative) Sampling in case of disput
16、e 24 Bibliography 25 EN 14951:2006 (E) 3 Foreword This document (EN 14951:2006) has been prepared by Technical Committee CEN/TC 175 “Round and sawn timber”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an
17、 identical text or by endorsement, at the latest by September 2006, and conflicting national standards shall be withdrawn at the latest by September 2006. This standard is one of a series of standards concerning solid wood panelling and wood flooring (including parquet). According to the CEN/CENELEC
18、 Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
19、Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14951:2006 (E) 4 Introduction This document specifies the characteristics of solid hardwood panelling and cladding elements. It is based upon current dimensional standards within the
20、 industry and other characteristics together with functions that have been verified by test. A large amount of knowledge exists about solid hardwood panelling and cladding elements and values for product characteristics are attested by long use and experience. It is therefore not necessary to have t
21、est results for those products and species described. The appearance of the hardwood panelling and cladding is mainly influenced by species, classification and the pattern (e.g. the profile and system of assembly). EN 14951:2006 (E) 5 1 Scope This document specifies the characteristics of solid hard
22、wood panelling and cladding elements with or without grooves and/or tongues, for interior or exterior use. It does not cover characteristics of the possible coating system. NOTE 1 Products sold in The European Economic Area will have to comply with prEN 14915. NOTE 2 For softwood see EN 14519. 2 Nor
23、mative references The following referenced documents are indispensable for the application 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 351-1, Durability of wood an
24、d wood-based products Preservative-treated solid wood Part 1: Classification of preservative penetration and retention EN 460, Durability of wood and wood-based products - Natural durability of solid wood - Guide of the durability requirements for wood to be used in hazard classes EN 844-9:1997, Rou
25、nd and sawn timber Terminology Part 9: Terms relating to features of sawn timber EN 1309-1:1997, Round and sawn timber Method of measurement of dimensions Part 1: Sawn timber EN 1310, Round and sawn timber - Method of measurement of features EN 1311, Round and sawn timber - Method of measurement of
26、biological degrade EN 13183-1, Moisture content of a piece of sawn timber - Part 1: Determination by oven dry method EN 13183-2, Moisture content of a piece of sawn timber - Part 2: Estimation by electrical resistance method EN 13647, Wood and parquet flooring and wood panelling and cladding - Deter
27、mination of geometrical characteristics EN 13756:2002, Wood flooring Terminology prEN 14915, Solid wood panelling and cladding - Characteristics, evaluation of conformity and marking 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 13756:2002, EN 844-9
28、:1997 and EN 1309-1:1997 and the following apply. 3.1 panelling and cladding without tongue and groove boards of solid wood without “tongue and groove” that have been machined on the face and two edges. The back is either machined or hit and/or missed, depending on the product. The arrises may be ch
29、amfered or rounded. For special purposes (for instance, acoustic) the edges may have fastening grooves. The ends of the boards may be end-matched. EN 14951:2006 (E) 6 3.2 panelling and cladding with tongue and groove tongued and grooved boards of solid wood which have been machined on the face and t
30、wo edges. The back is either machined or hit and/or missed, depending on the product. The ends of the boards may be end-matched with tongue and groove. 3.3 panelling rigid or semi-rigid elements of solid wood mainly for interior use 3.4 cladding rigid or semi-rigid elements of solid wood mainly for
31、exterior use 3.5 hit or missed feature of the surface of a board where some areas of a face remain untouched during the planning process, leaving a sawn or partially sawn finish 4 Symbols and abbreviations Symbols and abbreviations used in this document are given in Figures 1 and 2 and in Tables 10
32、and 11. 5 Requirements 5.1 General All requirements apply at the time of production, unless the manufacturer states otherwise. Finger jointing is acceptable and has to be specified by the manufacturer. NOTE The bonding should be appropriate for the intended use (see prEN 13307-2). 5.2 Wood species T
33、he most commonly used hardwood species for wood panelling and cladding elements are those mentioned in 5.3.2.1 to 5.3.2.4 (European species) and 5.3.2.5 (Tropical species and other species). Other species may be used if indicated in contracts. 5.3 Appearance 5.3.1 General uses The following tables i
34、dentify the features, and their limits, that shall be considered with regard to the appearance, use and general characteristics of the species where assigned to each grade. Tables 1 to 9 define the classification relating to appearance rules for the face and for the non-visible parts (back and edges
35、) of an element of the most commonly used hardwood species for solid wood panelling and cladding as defined in this standard. Features shall be measured according to EN 1310 (knots assessed according to the general method of EN 1310). Biological alteration is measured according to EN 1311. A classif
36、ication with two appearance classes is specified, designated A and B. A classification named “Free class“ is based on the principles laid out in Annex A. EN 14951:2006 (E) 7 The face shall include the entire visible surface of the element. It shall therefore extend to the chamfering1), if any. The w
37、ood shall be free from shake and shall be sound. Sapwood cannot always be distinguished and generally is not suitable for external use. The boards may be finished with a surface coating. The grading is done before the coating is applied. 5.3.2 Rules for the most commonly used species 5.3.2.1 Quercus
38、 spp.(oak) Rules for oak are given in Table 1 1) The chamfering is visible when elements are assembled. EN 14951:2006 (E) 8 Table 1 Classification for Quercus spp.(oak) Face of the element Features b) c) d)Class A B Sound sapwooda)Not permitted for outdoor use, permitted for indoor use Not permitted
39、 for outdoor use, permitted for indoor use Knotse)Sound and intergrown Unsound knots (if not in clusters) Permitted if: 20% of the width of the element diameter 2 mm Permitted if: 50 % of the width of the element diameter 10 mm Checks Total length one width of the element per m. Total length 2 width
40、 of the element per m. Split Not permitted Total length one width of the element per m. End shakes (going through the element) for end- matched elements Not permitted Total length 1/2 width of the element End shakes (going through the element) for non end- matched elements Total length 1/2 width of
41、the element Total length one width of the element Bark pockets Not permitted Slope of grain Permitted Colour variation Slight variation permitted Medullary ray Permitted All features permitted without limit to size or quantity if these do not impair the use Biological alteration (Fungal attack, inse
42、ct damage) Not permitted Not permitted, except blue stain and black holes Non-visible parts All features permitted without limit to size or quantity if these do not impair the use. In the case of class A sound sapwood is permitted from the back up to the upper part of the tongue (for elements with t
43、ongue) and up to 3mm for elements without tongue and groove. Information must be expressed in the marking to say what is outside use or indoor use a)See Clause 5.3.1. b) Not more than 5 % of the quantity of the consignment is allowed to be in the next lower grade. Pieces not achieving the requiremen
44、ts of the B grade must fulfil the principles of panelling and cladding end use. c) The classification for appearance does not take into account features which may impair the element when installed. d) The face compromises the whole visible surface of the strip when assembled. It therefore extends to
45、 the edges and in particular to the chamfers. e) Cat paws allowed EN 14951:2006 (E) 9 5.3.2.2 Fraxinus excelsior (ash) Rules for ash are given in Table 2. Table 2 Classification for Fraxinus excelsior (ash) Face of the element Class Features b) c) d)A B Sound sapwooda Normally not distinguishable fr
46、om heartwood Knots Sound and intergrown Unsound knots Permitted if: 20% of the width of the element diameter 2 mm Permitted if: 50% of the width of the element diameter 10 mm Checks Total length one width of the element per m. Total length 2 width of the element per m. Split Not permitted Total leng
47、th one width of the element per m. End shakes (going through the element) for end- matched elements Not permitted Total length 1/2 width of the element End shakes (going through the element) for non end- matched elements Total length 1/2 width of the element Total length one width of the element Bar
48、k pockets Not permitted Slope of grain Permitted Colour variation Natural colour variation accepted Stick marks Not permitted All features permitted without limit to size or quantity if these do not impair the use Biological alteration (Fungal attack, insect damage) Not permitted Not permitted, exce
49、pt blue stain and black holes Non-visible parts All features permitted without limit to size or quantity if these do not impair the use a)See Clause 5.3.1. b) Not more than 5 % of the quantity of the consignment is allowed to be in the next lower grade. Pieces not achieving the requirements of the B grade must fulfil the principles of panelling and cladding end use. c) The classification for appearance does not take into account features which may impair the element when installed. d) The face compromises the whole vis
