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1、BRITISH STANDARD BS EN 12465:2001 Wood poles for overhead lines Durability requirements The European Standard EN 12465:2001 has the status of a British Standard ICS 29.240.20; 79.080 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: sheffieldun sheffieldun, na, Sa
2、t Oct 28 07:16:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 12465:2001 This British Standard, having been prepared under the direction of the Building and Civil Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee o
3、n 4 April 2002 BSI 4 April 2002 ISBN 0 580 39459 X National foreword This British Standard is the official English language version of EN 12465:2001. The UK participation in its preparation was entrusted by Technical Committee B/518, Structural timber, to Subcommittee B/518/5, Wood poles for power a
4、nd telecommunications, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the
5、 BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are res
6、ponsible for their 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 responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK inte
7、rests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 10, an inside back cover and a back cover. The BSI copyright date displayed in this docu
8、ment indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:16:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12465 November 2001 ICS 29.240.2
9、0; 79.080 English version Wood poles for overhead lines - Durability requirements Poteaux en bois pour lignes ariennes - Exigences de durabilit Holzmaste fr Freileitungen - Dauerfestigkeitsanforderungen This European Standard was approved by CEN on 13 October 2001. CEN members are bound to comply wi
10、th the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centr
11、e or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official ver
12、sions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN
13、 DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2001 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12465:2001 E Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:16:5
14、6 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12465:2001 (E) 2 Contents page Foreword3 Introduction.4 1Scope5 2Normative references5 3Terms and definitions .6 4Symbols and abbreviations6 5General requirements .6 5.1Requirements for raw materials6 5.1.1Wood poles.6 5.1.2Wood preservative7 5.2Preser
15、vative-treated wood poles.7 5.2.1General .7 5.2.2Penetration requirement .7 5.2.3Retention requirement 7 5.2.4Tolerances for preservative-treated charges7 6Factory production control.8 6.1General8 6.2Frequency of direct testing8 6.3Frequency of indirect testing.8 7Sampling.8 7.1General8 7.2Selection
16、 of test samples from sampling unit8 Annex A (informative) Scheme for sampling preservative-treated wood poles by taking borings.9 Bibliography10 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:16:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12465:2001 (E) 3 Foreword This European Stan
17、dard has been prepared by Technical Committee CEN/TC 124 “Structural timber“, the secretariat of which is held by DS. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2002, and conflicting nati
18、onal standards shall be withdrawn at the latest by May 2002. This standard includes an informative annex A on a scheme for sampling preservative-treated timber. This standard contains a Bibliography. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the follo
19、wing countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na
20、, Sat Oct 28 07:16:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12465:2001 (E) 4 Introduction This standard is one of five standards covering requirements for visual or machine grading, test methods, determination of characteristic values, methods of specifying durability and sizes. This standar
21、d is concerned with the durability characteristics of wood poles for overhead power and telecommunication lines. It assumes that all such poles will be constructed from round timber in which the finished product comprises either a central core of heartwood surrounded by a zone of sapwood or the hear
22、twood only. Such assumptions dictate that where sapwood is present preservative treatment is normally required in order to provide the poles with sufficient enhanced durability unless the amount of sapwood present is such that its loss would not compromise the integrity of the pole during its servic
23、e life, and the heartwood has sufficient natural durability as required in this standard. NOTE Some timbers (e.g. Fir and Spruce) do not allow a ready differentiation between heartwood and sapwood. EN 351-1 specifies how such timbers should be treated when preservation is required. Licensed Copy: sh
24、effieldun sheffieldun, na, Sat Oct 28 07:16:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12465:2001 (E) 5 1 Scope This European Standard specifies the requirements for durability and preservative treatment of wood poles for overhead transmission and telecommunication lines. This standard covers
25、only single poles under cantilever or compression loading. For example, this standard does not cover poles used as beams. The provision of poles for use in any overhead line or cable infrastructure shall take into account a range of factors not covered by this standard which will necessitate the spe
26、cification by the end user of complementary and synonymous attributes to those defined in this standard. This refers to requirements for a number of factors including safety, overhead plant, handling, fittings, installation machinery and working practices including climbing. No attempt has been made
27、 to quantify the service life that may be expected from a pole as this will depend on its geographical location, the associated climate of its service environment and either the natural durability of the heartwood of the species selected, or the combination between selection of species, preservative
28、 type, and requirements of penetration and retention and any incised zones, any of which may be specified by the purchaser. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the approp
29、riate 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 European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the public
30、ation referred to applies (including amendments). EN 252, Field test method for determining the relative protective effectiveness of a wood preservative in ground contact. EN 350-1, Durability of wood and wood-based products. Natural durability of solid wood - Part 1: Principles of testing and class
31、ification of the natural durability of wood. EN 350-2, Durability of wood and wood-based products. Natural durability of solid wood - Part 2: Guide to natural durability and treatability of selected wood species of importance in Europe. EN 351-1:1995, Durability of wood and wood-based products. Pres
32、ervative-treated solid wood - Part 1: Classification of preservative penetration and retention. EN 351-2:1995, Durability of wood and wood-based products. Preservative-treated solid wood - Part 2: Guidance on sampling for analysis of preservative-treated wood. EN 599-1, Durability of wood and wood-b
33、ased products. Performance of wood preservatives determined by biological tests - Part 1: Specification according to hazard class. ISO 2859-1, Sampling procedures for inspection by attributes - Part 1: Sampling plans indexed by acceptable quality level (AQL) for lot-by-lot inspection. Licensed Copy:
34、 sheffieldun sheffieldun, na, Sat Oct 28 07:16:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12465:2001 (E) 6 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply. 3.1 charge all the wood treated together in one treatment at one time 3.2 di
35、rect testing testing the preservative treatment achieved by the direct measurement of the penetration and retention of preservative 3.3 incised zone area of the lateral surface of the pole which has undergone an incising process as an aid to securing deeper and more uniform penetration of preservati
36、ve. The minimum limit of the incised zone should be 400 mm above and 400 mm below the specified ground line for the pole in service 3.4 indirect testing testing the preservative treatment achieved by measurement of a property found to exhibit a correlation between itself and the penetration and rete
37、ntion of preservative 3.5 pole long round timber for use in a free standing application 3.6 sampling unit single preservative-treated pole taken from a charge 4 Symbols and abbreviations None. 5 General requirements 5.1 Requirements for raw materials 5.1.1 Wood poles The poles shall be free from fea
38、tures, which would prevent a proper application of preservative and thus impair the function of the preservative-treated poles when in service. NOTE All dressing, notching, pre-cutting and boring should be completed before preservative treatment. Prior to preservative treatment the moisture content
39、of the pole should be at a level appropriate to the wood preservative and method of treatment used. When this moisture content has been reached and until the preservative treatment is carried out, poles should be protected against heavy and continuous precipitation. The natural durability to wood-de
40、stroying fungi of the heartwood of a pole shall be specified by reference to the system defined in EN 350-1. Species in classes 1 and 2 (very durable and durable) may be specified for poles used without preservative treatment and for such poles, 5.1.2 to 6.2 do not apply. The natural durability shal
41、l be established either a)by testing the wood species concerned according to the principles laid down in EN 350-1. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:16:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12465:2001 (E) 7 b) by reference to EN 350-2, where wood species are listed
42、 as complying with the various classes of natural durability to wood-destroying fungi. Timber species with a natural durability classification that includes a range (e.g. “4-5”) shall be regarded as having a natural resistance associated with the larger quoted number. 5.1.2 Wood preservative Wood pr
43、eservatives used shall conform to the performance requirements of hazard class 4 preservatives as defined in EN 599-1. For the purposes of this standard, determination of compliance with the performance requirements of EN 599-1 shall include data from the field test EN 252 and any of the additional
44、local tests given in EN 599-1 and deemed necessary at the local, rather than pan-European, level. 5.2 Preservative-treated wood poles 5.2.1 General Preservative treatment shall be defined in terms of depth of lateral penetration of preservative into the treated pole and retention of preservative wit
45、hin that treated zone according to the requirements of EN 351-1. For the purposes of verifying compliance with EN 351-1 a charge shall be considered. The supplier shall agree with the user the processes and process limits which shall be used in the treatment. NOTE The preservative treatment used sho
46、uld not result in a significant reduction in the strength properties of the pole. For example, creosote treatment at high pressure, especially in combination with a high creosote temperature, may cause deformation of resistant timbers, notably some species of softwood and lightweight hardwoods. 5.2.
47、2 Penetration requirement The penetration requirement shall be defined in terms of the penetration classes listed in EN 351-1. Following completion of the preservation process, treated poles shall meet the requirements of the selected penetration class of EN 351-1. For permeable species, full sapwoo
48、d penetration P8, is required. For resistant species, P7 is required in any incised zone and P5 is required elsewhere. NOTE Other penetration requirements may be specified but users should be aware that lesser penetrative requirements could lead to a shorter service life. 5.2.3 Retention requirement
49、 Following completion of the preservation process, the retention requirement specified by the user for treated poles shall be equal to or greater than the critical value for hazard class 4 of the preservative used (see EN 559-1). This critical value shall be calculated from the prescribed biological tests defined in EN 599-1 including the field test in EN 252. NOTE Multiples greater than one may be applied to the critical value to specify higher retentions as a means of increasing the service life. In the case of established preservatives where a critical value
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