SIST EN 385:2002
(Main)Finger jointed structural timber - Performance requirements and minimum production requirements
Finger jointed structural timber - Performance requirements and minimum production requirements
This standard specifies requirements for bonded finger joints and minimum requirements for the manufacture of cut, interlocking, bonded finger joints in structural timber members. Requirements are given for timber, adhesive, moisture content, cutting and bonding.
This standard is only applicable to finger joints between timber members of the same species type.
Although most finger joints are produced in coniferous species this standard also applies to broad-leaved species where information is available to enable them to be satisfactorily bonded.
It does not cover impressed (die-formed) joints. In the case of glued laminated timber it applies only to individual laminations. Large finger joints in glued laminated timber are covered by EN 387.
NOTE This standard is elaborated as a supporting standard for a harmononized standard on structural timber with finger joints to be published in the future.
Keilzinkenverbindungen im Bauholz - Leistungsanforderungen und Mindestanforderungen an die Herstellung
Diese Norm enthält Anforderungen an verklebter Keilzinkenverbindungen und Mindestanforderungen an die Herstellung gefräster, ineinandergefügter und verklebte Keilzinkenverbindungen in Bauholz für tragende Zwecke. Die Anforderungen betreffen das Holz, den Klebstoff, die Holzfeuchte, das Fräsen, die Verklebung und die Behandlung mit Holz- und Flammschutzmitteln.
Diese Norm gilt nur für Keilzinkenverbindungen in Holzbauteilen derselben Holzart.
Obwohl die meisten Keilzinkenverbindungen aus Nadelholzarten hergestellt werden, gilt diese Norm auch für Laubholzarten, sofern Angaben über Anforderungen, die eine zufrieden stellende Verklebung ergeben, vorliegen.
Verbindungen, deren Zinken durch Pressverformung hergestellt werden, sind in dieser Norm nicht berücksichtigt. Die Norm bezieht sich nur auf Einzellamellen von Brettschichtholz. Universal-Keilzinkenverbindungen in Brett-schichtholz sind in EN 387 enthalten.
ANMERKUNG Diese Norm wurde als ?unterstützende Norm" für eine harmonisierte Norm für Keilzinkenverbindungen im Bauholz, die zu einem späteren Zeitpunkt veröffentlicht werden soll, erarbeitet.
Aboutages a entures multiples dans les bois de construction - Exigences de performance et exigences minimales de fabrication
La présente norme définit des exigences pour les aboutages a entures multiples collés et les exigences minimales pour l'usinage et l'emboîtement des aboutages a entures multiples collés dans les éléments de bois de structure. Les exigences concernent le bois, les adhésifs, la teneur en humidité, l'usinage, l'encollage et les traitements de préservation.
La présente norme s'applique uniquement aux aboutages a entures multiples entre les membrures en bois de meme type d'essence.
Bien que la plupart des aboutages a entures multiples soit produite avec des essences résineuses, la présente norme s'applique aussi aux feuillus, si des informations sont disponibles pour leur permettre de réaliser des assemblages collés satisfaisants.
Elle ne concerne pas les aboutages matricés. Dans le cas de bois lamellés collés, elle s'applique exclusivement aux lamelles individuelles. Les aboutages a entures multiples de grandes dimensions dans les bois lamellés collés sont couverts par l'EN 387.
NOTE La présente norme est élaborée en tant que support a une norme harmonisée sur les bois de structure avec aboutages a entures multiples, qui sera publiée dans l'avenir.
Konstrukcijski les z zobatimi stiki - Zahteve za uporabo in minimalne zahteve za proizvodnjo
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Konstrukcijski les z zobatimi stiki - Zahteve za uporabo in minimalne zahteve za proizvodnjoKeilzinkenverbindungen im Bauholz - Leistungsanforderungen und Mindestanforderungen an die HerstellungAboutages a entures multiples dans les bois de construction - Exigences de performance et exigences minimales de fabricationFinger jointed structural timber - Performance requirements and minimum production requirements79.040Les, hlodovina in žagan lesWood, sawlogs and sawn timberICS:Ta slovenski standard je istoveten z:EN 385:2001SIST EN 385:2002en01-julij-2002SIST EN 385:2002SLOVENSKI
STANDARDSIST EN 385:19961DGRPHãþD
SIST EN 385:2002
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 385October 2001ICS 79.040Supersedes EN 385:1995English versionFinger jointed structural timber - Performance requirements andminimum production requirementsAboutages à entures multiples dans les bois deconstruction - Exigences de performance et exigencesminimales de fabricationKeilzinkenverbindungen im Bauholz -Leistungsanforderungen und Mindestanforderungen an dieHerstellungThis European Standard was approved by CEN on 3 September 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 385:2001 ESIST EN 385:2002
EN 385:2001 (E)2ContentspageForeword.3Introduction.41Scope.42Normative references.43Terms and definitions.44Symbols.65Requirements.65.1General.65.2Timber.75.2.1Species.75.2.2Knots and fissures.75.2.3Wane or edge damage.75.3Adhesives.85.4Bending strength.96Manufacturing requirements.96.1Production conditions.96.2Timber.96.3Adhesive application.96.3.1Adhesive application by machine.96.3.2Manual adhesive application.106.4Assembly and end pressure.106.4.1Assembly.106.4.2End pressure.107Quality control.117.1Factory production control.117.1.1General.117.1.2Sampling of finger joints.117.1.3Testing of finger joints.117.1.4Compliance.127.2Organization of factory production control.137.2.1Responsibility and authority.137.2.2Delegated by the manufacturer for factory production control.137.2.3Inspection by the manufacturer.147.3Documentation of the quality control system.147.4Inspection and testing.147.4.1General.147.4.2Action in case of non-conformity.147.4.3Quality surveillance of non-conforming finger joints.148Type testing, initial determination of joint strength.158.1General.158.2Materials.158.3Preparation of specimens.158.4Procedure.158.5Test report.158.6Classification of joints.15Annex A
(informative)
The tasks of the third party certification body.16SIST EN 385:2002
EN 385:2001 (E)3ForewordThis European Standard has been prepared by Technical Committee CEN/TC 124 "Timber structures", thesecretariat of which is held by DS.This European Standard supersedes EN 385:1995.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 April 2002, and conflicting national standards shall be withdrawn at the latest byApril 2002.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 385:2002
EN 385:2001 (E)4IntroductionThis standard was written based on Recommended Standard for Finger Jointing in Coniferous Sawn Timber preparedby the ECE (Economic Commission of Europe) Timber Committee and published in the Timber Bulletin for Europe(Vol. XXXIV, Supplement 16, November 1982) with Draft Amendments, May 1988. This standard was developed onthe basis of the use of European redwood and whitewood, but most of the requirements apply to any species.Further, it was recognized that finger-jointing standards are currently in use in different countries and experience withthese has influenced this standard.1 ScopeThis standard specifies requirements for bonded finger joints and minimum requirements for the manufacture of cut,interlocking, bonded finger joints in structural timber members. Requirements are given for timber, adhesive, moisturecontent, cutting and bonding.This standard is only applicable to finger joints between timber members of the same species type.Although most finger joints are produced in coniferous species this standard also applies to broad-leaved specieswhere information is available to enable them to be satisfactorily bonded.It does not cover impressed (die-formed) joints. In the case of glued laminated timber it applies only to individuallaminations. Large finger joints in glued laminated timber are covered by EN 387.NOTE
This standard is elaborated as a supporting standard for a harmonized standard on structural timber with finger joints to bepublished in the future.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 301, Adhesives, phenolic and aminoplastic for load-bearing timber structures - Classification andperformance requirements.EN 408, Timber structures – Structural timber and glued laminated timber – Determination of somephysical and mechanical properties.3 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply:3.1finger jointself-locating end joint formed by machining a number of similar, tapered, symmetrical fingers in the ends of timbermembers, which are then bonded together. See Figure 1SIST EN 385:2002
EN 385:2001 (E)5Keyl
Finger lengthp
Pitchbt
Tip widthlt
Tip gap1)
Symmetry directionFigure 1 - Typical profile of finger joint3.2finger lengthdistance between the finger base and the tip of the finger, measured along the centre line of the finger3.3pitchdistance between fingers, centre to centre3.4production batchjoints, all of which have the same profile, manufactured from the same species of timber, the same strength class,having the same nominal cross section, bonded with the same adhesive and made during a continuous run on oneproduction line3.5service class 1service class characterized by a moisture content in the materials corresponding to a temperature of 20 C and therelative humidity of the surrounding air only exceeding 65 % for a few weeks per yearNOTE
In service class 1 the average equilibrium moisture content in most softwoods will not exceed 12 %.3.6service class 2service class characterized by a moisture content in the materials corresponding to a temperature of 20 C and therelative humidity of the surrounding air only exceeding 85 % for a few weeks per yearNOTE
In service class 2 the average equilibrium moisture content in most softwoods will not exceed 20 %.3.7service class 3service class characterized by climatic conditions leading to higher moisture contents than service class 23.8tip gapdistance between finger tip and opposite slot base in a bonded finger jointSIST EN 385:2002
EN 385:2001 (E)63.9tip widthdistance between finger faces, measured at the tip of the finger4 SymbolsAarea, in square millimetres;AWarea of one wane, in square millimetres;aWdiagonal length of wane, in millimetres;bwidth of cross section, in millimetres;bttip width, in millimetres;ddiameter, in millimetres;fmbending strength, in newtons per square millimetre;fm,kcharacteristic bending strength, in newtons per square millimetre;fm,15,kcharacteristic bending strength of 15 specimens, see 7.1.4, in newtons per square millimetre;fm,15,meanmean value of bending strength of 15 specimens, see 7.1.4, in newtons per square millimetre;fm,dc,kcharacteristic bending strength, declared by the manufacturer, in newtons per square millimetre;hdepth of cross section, in millimetres;kffactor, see 7.1.4;k15statistical factor, see 7.1.4;lfinger length, in millimetres;lttip gap, in millimetres;ppitch, in millimetres;sstandard deviation (the variable is given in parenthesis).5 Requirements5.1 GeneralThe cutting and the bonding operations of finger joints shall result in reliable and durable bonds of requiredstrength.These general requirements shall be considered satisfied if both the requirements in this clause and the minimumproduction requirements in clause 6 are fulfilled.SIST EN 385:2002
EN 385:2001 (E)75.2 Timber5.2.1 SpeciesSufficient information on the timber species shall be available to enable the timber to be satisfactorily bonded.5.2.2 Knots and fissuresFor the following requirements knots with a diameter not greater than 6 mm shall be disregarded.There shall be no knots, fissures or pronounced grain disturbance within the joint itself. Outside the joint thedistance between a knot and the end of the cross-cut timber shall be not less than l + 3d where d is the diameter ofthe knot measured perpendicular to the grain direction (longitudinal direction), see Figure 2.Figure 2 - Minimum distance from the end of the timber to a knotWhere a member is cross-cut to remove a knot, the cut shall be made at a distance from the knot at least equal to alength of 3d, see Figure 3.Figure 3 - Minimum distance for a cross-cut to remove a knot5.2.3 Wane or edge damageThere shall be no wane or edge damage affecting more than two corners at the joint within the finger length and within75 mm of the root of the fingers. The area of the wane at any corner shall not exceed 1 % of the cross-sectional area,see Figure 4.NOTE
Conformity with this requirement can be verified by measuring the diagonal aw of the wane and demonstrating that it is lessthan the maximum diagonal given in figure 5 as a function of the cross-sectional area A.SIST EN 385:2002
EN 385:2001 (E)8Figure 4 - Cross section of timber with waneFigure 5 - Maximum diagonal of wane/5A = amaxW,5.3AdhesivesThe adhesive shall enable joints of such strength and durability to be produced in order that the integrity of the bond ismaintained throughout the intended lifetime of the structure.Acceptable strength and durability can be achieved by the use of an adhesive of type I and shall meet therequirements for this type given in EN 301. Or, for structures in service class 1 or 2 an adhesive of type II according toEN 301 can be used, provided the temperature of the member in the structure will always be below 50 C.NOTE 1
The adhesive should be chosen considering the climatic conditions in service, the timber species, the preservative used(if any) and the production methods.NOTE 2
Such strength and durability can be achieved by a polycondensation adhesive of the phenolic or aminoplastic type asdefined in EN 301.For adhesives of other
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.