SIST EN 12509:2002
(Main)Timber poles for overhead lines - Test methods - Determination of modulus of elasticity, bending strength, density and moisture content
Timber poles for overhead lines - Test methods - Determination of modulus of elasticity, bending strength, density and moisture content
This European Standard specifies methods of test to determine modulus of elasticity, bending strength, density and moisture content of solid wood poles for overhead transmission and telecommunication lines. It is applicable to both hardwood and softwood poles.
This standard covers only single poles under cantilever and/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 specification 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.
Holzmaste für Freileitungen - Prüfverfahren - Bestimmung des Elastizitätsmoduls, der Biegefestigkeit, der Dichte und des Feuchtigkeitsgehalts
Diese Europäische Norm beschreibt Prüfverfahren zur Bestimmung des Elastizitätsmoduls, der Biegefestigkeit, der Rohdichte und des Feuchtegehalts von Vollholzmasten für Energieüber-tragungs-- und Fernmeldefreileitungen. Sie gilt für Laub- und Nadelholzmaste.
Diese Norm gilt nur für eingespannte einstielige Maste und/oder Druckbeanspruchung. Diese Norm berücksichtigt zum Beispiel nicht die Verwendung von Masten als Biegeträger.
Der Einsatz von Masten in Freileitungen, erfordert die Berücksichtigung einer Reihe von Faktoren, die in der vorliegenden Norm nicht erfaßt sind; der Betreiber kann seine speziellen Anforderungen mit ergänzenden Anforderungen zu den in der vorliegenden Norm definierten vervollständigen. Dies betrifft Anforderungen an die Sicherheit, die Freileitungsanlage, die Handhabung, das Zubehör, die Hilfsmittel für die Errichtung und an die Arbeitsvorgänge einschließlich der Mastbesteigung.
Poteaux en bois pour lignes aériennes - Méthodes d'essai - Détermination du module d'élasticité, de la résistance a la flexion, de la masse volumique et de la teneur en humidité
La présente norme spécifie des méthodes d'essai permettant de déterminer le module d'élasticité, la résistance a la flexion, la masse volumique et la teneur en humidité des poteaux en bois massif destinés aux lignes aériennes de transmission et de télécommunication. La présente norme s'applique aussi bien aux poteaux en bois feuillus qu'en bois résineux.
La présente norme s'applique uniquement aux poteaux simples soumis a une charge en porte-a-faux et/ou a une charge en compression. La présente norme ne concerne pas les poteaux utilisés comme poutres, par exemple.
Lors de l'utilisation de poteaux en bois pour un usage au sein de toute infrastructure aérienne de lignes ou de câbles, il est nécessaire de prendre en compte une série de facteurs sortant du domaine d'application de la présente norme, et nécessitant de la part de l'acheteur final, la spécification de prescriptions supplémentaires et synonymes de celles qui sont définies dans la présente norme. Cette nécessité a trait aux prescriptions de conformité a l'égard d'un certain nombre de facteurs relatifs a la sécurité, aux installations aériennes, a la manutention, aux équipements, aux machines d'installation et aux pratiques d'usage, y compris l'escalade.
Leseni drogovi za nadzemne vode - Preskusni postopki - Ugotavljanje modula elastičnosti, upogibne trdnosti, gostote in vlage
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Holzmaste für Freileitungen - Prüfverfahren - Bestimmung des Elastizitätsmoduls, der Biegefestigkeit, der Dichte und des FeuchtigkeitsgehaltsPoteaux en bois pour lignes aériennes - Méthodes d'essai - Détermination du module d'élasticité, de la résistance a la flexion, de la masse volumique et de la teneur en humiditéTimber poles for overhead lines - Test methods - Determination of modulus of elasticity, bending strength, density and moisture content79.080Polizdelki iz lesaSemi-manufactures of timber29.240.20DaljnovodiPower transmission and distribution linesICS:Ta slovenski standard je istoveten z:EN 12509:2001SIST EN 12509:2002en01-julij-2002SIST EN 12509:2002SLOVENSKI
STANDARD
SIST EN 12509:2002
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12509November 2001ICS 29.240.20; 79.080English versionTimber poles for overhead lines - Test methods - Determinationof modulus of elasticity, bending strength, density and moisturecontentPoteaux en bois pour lignes aériennes - Méthodes d'essai -Détermination du module d'élasticité, de la résistance à laflexion, de la masse volumique et de la teneur en humiditéHolzmaste für Freileitungen - Prüfverfahren - Bestimmungdes Elastizitätsmoduls, der Biegefestigkeit, der Dichte unddes FeuchtigkeitsgehaltsThis European Standard was approved by CEN on 13 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 12509:2001 ESIST EN 12509:2002
EN 12509:2001 (E)2ContentspageForeword.3Introduction.41Scope.52Normative references.53Terms and definitions.54Symbols.65Requirements for determination of sizes, moisture content and density.75.1Determination of sizes.75.2Determination of moisture content.75.3Determination of density.76Test method for bending properties.86.1Principle.86.2Preparation.86.3Apparatus.96.4Procedure.96.5Results.106.6Test report.116.6.1Test material.116.6.2Test procedure.116.6.3Test results.11Annex A
(informative)
Example of suitable cantilever bending test method.13Bibliography.14SIST EN 12509:2002
EN 12509:2001 (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 May 2002, and conflicting national standards shall be withdrawn at the latest byMay 2002.This standard includes an informative annex A describing a suitable test method for cantilever bending.This standard includes a Bibliography.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 12509:2002
EN 12509:2001 (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.SIST EN 12509:2002
EN 12509:2001 (E)51 ScopeThis European Standard specifies methods of test to determine modulus of elasticity, bending strength, density andmoisture content of solid wood poles for overhead transmission and telecommunication lines. It is applicable toboth hardwood and softwood 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).EN 212, Wood Preservatives - Guide to sampling and preparation of wood preservatives and treatedtimber for analysis.EN 12465:2001, Wood poles for overhead lines - Durability requirements.prEN 12479, Wood poles for overhead lines - Sizes - Methods of measurement and limit deviations.prEN 12510, Wood poles for overhead lines - Strength grading criteria.ISO 3130, Wood - Determination of moisture content for physical and mechanical tests.ISO 3131, Wood - Determination of density for physical and mechanical tests.3 Terms and definitionsFor the purposes of this European Standard, the following the terms and definitions apply.3.1bulk densitymass per unit volume of material, including voids and liquids3.2dry densitymass of material, dried to constant mass at (103
2)°C, per unit volume of undried materials3.3minimum diameterminimum diameter of the pole at the section of measurement3.4moisture contentratio of the mass of the quantity of water in a material to the mass of the dry materialSIST EN 12509:2002
EN 12509:2001 (E)63.5nominal diametera)theoretical diameter for poles with 5 % or less ovality;b)minimum diameter for pole with greater than 5 % ovality3.6ovalitydifference between the maximum and minimum diameter at a cross section expressed as a percentage of theminimum diameter3.7polelong round timber for use in a free standing application3.8pole buttlowermost point of the thicker end of the pole3.9pole tipuppermost point of the narrow end of the pole3.10populationgroup of poles defined by having the same species, source and grade3.11sample sizenumber of test poles from one population3.12section of maximum stresssection of pole where the diameter equals 1,5 x diameter at point of application of load, if this section is aboveground line or otherwise the actual ground line section3.13theoretical diameterdiameter of a circle with the same circumference as the actual circumference at the section of measurement4 Symbolsdgnominal diameter at assumed ground-line, in millimetresdqnominal diameter at point of load application, in millimetresdmaxnominal diameter at section of maximum stress, in millimetresEmodulus of elasticity parallel to grain in bending, in newtons per square millimetrefmbending strength - maximum stress at assumed ground line or point of maximum stress if this is abovethe assumed ground line, in newtons per square millimetreIqsecond moment of area of cross section at point of load application, in millimetres to the fourth powerlpole length measured from butt to tip, in millimetreslgdistance from butt to assumed ground-line, in mill
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