SIST EN 387:2002

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Lepljeni lamelirani les - Polni zobati spoji - Zahteve za uporabo in minimalne zahteve za proizvodnjoBrettschichtholz - Universal-Keilzinkenverbindungen - Leistungsanforderungen und Mindestanforderungen an die HerstellungBois lamellé collé - Aboutages a entures multiples de grandes dimensions - Exigences de performance et exigences minimales de fabricationGlued laminated timber - Large finger joints - Performance requirements and minimum production requirements79.060.99Other wood-based panelsICS:Ta slovenski standard je istoveten z:EN 387:2001SIST EN 387:2002en01-julij-2002SIST EN 387:2002SLOVENSKI
STANDARDSIST ENV 387:20001DGRPHãþD



SIST EN 387:2002



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 387October 2001ICS 79.060.99Supersedes ENV 386:1999English versionGlued laminated timber - Large finger joints - Performancerequirements and minimum production requirementsBois lamellé collé - Aboutages à entures multiples degrandes dimensions - Exigences de performance etexigences minimales de fabricationBrettschichtholz - Universal-Keilzinkenverbindungen -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 386:2001 ESIST EN 387:2002



EN 387:2001 (E)2ContentspageForeword.3Introduction.41Scope.42Normative references.53Terms and definitions.54Symbols.65Requirements.75.1General.75.2The large finger joint.75.3Adhesives.75.4Bending strength.76Manufacturing requirements.86.1Production conditions.86.1.1Premises.86.1.2Equipment.86.2Glued laminated timber and other wood based members.86.2.1Temperature.86.2.2Moisture content.86.3Manufacture.96.3.1Fingers.96.3.2Bonding.96.3.3Cramping.106.3.4Handling of finger jointed members.106.3.5Curing and conditioning.107Quality Control.107.1Factory production control.107.2Organization of factory production control.117.2.1Responsibility and authority.117.2.2Management representative for factory production control.117.2.3Management review.117.3Documentation of the quality control system.117.4Inspection and testing.127.4.1General.127.4.2Action in case of non-conformity.127.4.3Control of non-conforming large finger joints.128Type testing, initial determination of joint strength.12Annex A
(informative)
The tasks of the third party certification body.13Bibliography.14SIST EN 387:2002



EN 387:2001 (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 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.This European Standard supersedes ENV 387:1999.Annex A is informative.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 387:2002



EN 387:2001 (E)4IntroductionThis standard concerns the production of large finger joints, which are finger joints across the whole cross section of astructural member of glued laminated timber also with corner pieces of laminated veneer lumber or plywood. Therequirements are to ensure the production of reliable and durable bonding, so that large finger joints may be used intimber structures of service classes 1 or 2. For timber structures of service class 3 special precautions should betaken, among these only adhesives of the phenolic resin type, which meet the requirements for adhesive type I of EN301 should be used. It is assumed that the production of large finger joints will take place at a factory in order toensure a stable and reliable product.1 ScopeThis standard specifies requirements for large finger joints and minimum requirements for the production of these instructural members of glued laminated timber also with corner pieces of laminated veneer lumber or plywood with afinger length of at least 45 mm. The glued laminated timber and the laminated veneer lumber shall be made fromconifers and poplar. Such finger joints may be employed for joints in straight beams or for frame corners, see Figure1.Key1
Direction of grainFigure 1 - Large finger joints in a beam and at frame cornersSIST EN 387:2002



EN 387:2001 (E)52 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 386:2001, Glued laminated timber - Performance requirements and minimum production requirements.EN 408, Timber structures - Structural timber and glued laminated timber - Determination of some physicaland mechanical properties.3 Terms and definitionsFor the purposes of this European Standard the following terms and definitions apply:3.1large finger jointfinger joint through the full cross-sectional area at the ends of glulam members bonded together at any angleincluding corner pieces of laminated veneer lumber or plywoodKeyl
Finger lengthp
Pitchbt
Tip widthlt
Tip gap1)
Finger symmetry directionFigure 2 - Typical profile of finger joint3.2finger lengthdistance between the slot base and the tip of the finger, measured along the centre line of the finger, see Figure 23.3glued laminated timber (glulam)structural member formed by bonding together timber laminations with the grain running essentially parallelSIST EN 387:2002



EN 387:2001 (E)63.4laminated veneer lumber (LVL)structural member formed by bonding together veneers with the grain running essentially parallel3.5pitchdistance between fingers, centre to centre, see Figure 23.6service 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 %.3.7service 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 %.3.8service class 3service class characterized by climatic conditions leading to higher moisture contents than service class 23.9tip widthdistance between finger faces, measured at the tip of the finger, see Figure 23.10tip gapdistance between finger tip and finger base in a bonded finger joint, see Figure 24 Symbolsbwidth of cross section, in millimetres;bttip width, in millimetres;ddiameter of cylindrical specimen, in millimetres;fmbending strength, in newtons per square millimetre;fm,kcharacteristic bending strength, 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;lfinger length, in millimetres;lttip gap, in millimetres;Mbending moment, in newton millimetres;ppitch, in millimetres;angle between the cross section at the joint and the grain direction, see Figure 1.SIST EN 387:2002



EN 387:2001 (E)75 Requirements5.1 GeneralThe cutting and bonding operations of large finger joints shall result in reliable and durable bonds of required strength.These general requirements shall be considered satisfied if both the requirements in this chapter and the minimumproduction requirements in chapter 6 are fulfilled.5.2 The large finger jointThe symmetry direction of the fingers shall be parallel to the grain, see Figure 2.The thickness of the glue line shall nowhere be larger than 0,5 mm. Glue lines at knots shall be disregarded.The tip gap shall be between 1 mm and 6 mm over the full joint depth after pressing.The total area with damaged fingers shall be less than 5 % of the cross section. The damaged fingers shall not beconcentrated in the tension zone.5.3 AdhesivesThe adhesive shall enable joints of such strength and durability to be produced in order that the integrity of the bond ismaintained throughout the planned lifetime of
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