SIST EN 12510:2002

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.WLHolzmaste für Freileitungen - Kriterien zur FestigkeitssortierungPoteaux en bois pour lignes aériennes - Criteres de classement de la résistanceWood poles for overhead lines - Strength grading criteria79.080Polizdelki iz lesaSemi-manufactures of timber29.240.20DaljnovodiPower transmission and distribution linesICS:Ta slovenski standard je istoveten z:EN 12510:2001SIST EN 12510:2002en01-julij-2002SIST EN 12510:2002SLOVENSKI
STANDARD



SIST EN 12510:2002



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12510December 2001ICS 29.240.20; 79.080English versionWood poles for overhead lines - Strength grading criteriaPoteaux en bois pour lignes aériennes - Critères declassement de la résistanceHolzmaste für Freileitungen - Kriterien zurFestigkeitssortierungThis European Standard was approved by CEN on 18 October 2001.CEN members are bound to comply with the CEN/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 Management Centre or to any 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 Management Centre has the same status as the officialversions.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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12510:2001 ESIST EN 12510:2002



EN 12510:2001 (E)2ContentspageForeword.3Introduction.41Scope.52Normative references.53Terms and definitions.54Symbols and abbreviations.85General Requirements.85.1General.85.2Species.85.3Wood preparation.95.3.1Tree felling.95.3.2Handling of untreated wood.95.3.3Storage of untreated wood.95.3.4Mechanical pre-treatments.95.4Measurement of strength reducing characteristics.95.4.1General.95.4.2Slope of grain.95.4.3Rate of growth.95.4.4Fissures.95.4.5Knots and knot clusters.95.4.6Mechanical damage.105.4.7Bark pockets and Rind Galls.106Visual grading.106.1Strength reducing characteristics.106.2Fixed characteristics.106.2.1Sources.106.2.2Decay and insects.106.2.3Included Sapwood.106.2.4Cracks.106.3Variable characteristics.116.3.1Knots.116.3.2Slope of grain.116.3.3Heartwood.116.3.4Rate of growth.116.3.5Straightness.116.3.6Bark pockets and Rindgalls.116.3.7Mechanical damage.116.3.8Ring and Star Shake.126.3.9Fissures.126.4Other characteristics.126.4.1Visual characteristics.126.4.2Other criteria.127Marking.12Annex A
(informative)
Examples of standards currently in use.14Bibliography.15SIST EN 12510:2002



EN 12510:2001 (E)3ForewordThis European Standard has been prepared by Technical Committee CEN/TC 124 "Structural timber", thesecretariat 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 orby endorsement, at the latest by June 2002, and conflicting national standards shall be withdrawn at the latest byJune 2002.This standard includes an informative annex A.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries 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.SIST EN 12510:2002



EN 12510:2001 (E)4IntroductionThis 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.There are many different visual strength grading rules for timber in use in Europe. These have come into existenceto allow for: different species or groups of species; geographic origin; different dimensional requirements; varying requirements for different uses; the quality of material available; historic influences or traditions.Because of the diversity of existing standards for wood poles for overhead lines in use in different countries it iscurrently impossible to lay down a single set of acceptable visual grading rules for all member states.This standard on visual grading rules therefore gives basic principles which shall be followed when drawing upregional, national, local or buyer requirements for some characteristics and sets limits for others.In laying down visual grading rules two main factors should be borne in mind: they should clearly define and limit the strength affecting characteristics in poles so that buyers shall have avery high confidence that poles supplied meet the required characteristic strength value; the rules and the text should be easily understood and be capable of implementation by grading personnel.Examples of standards currently in use and which meet these principles are listed in annex A (informative).SIST EN 12510:2002



EN 12510:2001 (E)51 ScopeThis European Standard specifies the requirements for the handling and storage and the characteristics forinclusion in regional/national/local/buyer standards of visual strength grading of softwood and hardwood poles. Italso specifies the marking requirements.This standard identifies the characteristics for which, as a minimum, limits shall be given in visual gradingstandards or specifications.This standard applies to both softwood and hardwood poles.This standard covers only single poles under cantilever and/or compression loading. For example, this standarddoes 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 factorsnot covered by this standard which will necessitate the specification by the end user of complementary andsynonymous attributes to those defined in this standard. This refers to requirements for a number of factorsincluding safety, overhead plant, handling, fittings, installation machinery and working practices including climbing.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).prEN 12509, Wood poles for overhead lines - Test methods - Determination of modulus of elasticity,bending strength, density and moisture content.ISO 3166-1, Codes for the representation of names of countries and their subdivisions - Part 1:Country codes.3 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply.3.1compression woodreaction wood formed typically on lower sides of branches and of leaning or crooked stems of softwood trees3.2cracksseparation of wood fibres across the grain. Such breaks may be due to internal strains resulting from unequallongitudinal shrinkage, fibres being crinkled by compression or other external forces3.3decaydecomposition of wood by fungi or other micro-organisms resulting in softening, progressive loss of mass andstrength, and often a change of texture and colourSIST EN 12510:2002



EN 12510:2001 (E)63.4double sweepsweep
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