SIST EN 16784:2016

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Holzbauwerke - Prüfverfahren - Bestimmung des Langzeitverhaltens beschichteter und unbeschichteter stiftförmiger VerbindungsmittelStructures en bois - Méthodes d'essai - Détermination du comportement à long terme des éléments de fixation de type tige, revêtus ou nonTimber structures - Test methods - Determination of the long term behaviour of coated and uncoated dowel-type fasteners91.080.20Lesene konstrukcijeTimber structuresICS:Ta slovenski standard je istoveten z:EN 16784:2016SIST EN 16784:2016en,fr,de01-september-2016SIST EN 16784:2016SLOVENSKI
STANDARD



SIST EN 16784:2016



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16784
June
t r s x ICS
{ sä r z rä t r English Version
Timber structures æ Test methods æ Determination of the long term behaviour of coated and uncoated dowelætype fasteners Structures en bois æ Méthodes d 5essai æ Détermination du comportement à long terme des éléments de fixation de type tigeá revêtus ou non
Holzbauwerke æ Prüfverfahren æ Bestimmung des Langzeitverhaltens beschichteter und unbeschichteter stiftförmiger Verbindungsmittel This European Standard was approved by CEN on
z April
t r s xä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
9
t r s x CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s x y z vã t r s x ESIST EN 16784:2016



EN 16784:2016 (E) 2 Contents Page European foreword . 3 1 Scope . 4 2 Normative references . 4 3 Terms and definitions . 4 4 Symbols and abbreviations . 4 5 Sampling . 5 5.1 Timber . 5 5.2 Fasteners . 5 6 Test method . 6 6.1 General . 6 6.2 Conditioning . 6 6.3 Fabrication of the specimens . 6 6.3.1 Fastener axis perpendicular to the grain . 6 6.3.2 Fastener axis parallel to the grain . 6 6.4 Test procedure . 7 6.5 Testing for duration of withdrawal load . 8 7 Expression of the results . 8 7.1 Load duration factor for withdrawal . 8 7.2 Test report . 9 Bibliography . 11
SIST EN 16784:2016



EN 16784:2016 (E) 3 European foreword This document (EN 16784:2016) has been prepared by Technical Committee CEN/TC 124 “Timber Structures”, the secretariat of which is held by AFNOR. 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 December 2016, and conflicting national standards shall be withdrawn at the latest by December 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 16784:2016



EN 16784:2016 (E) 4 1 Scope This European Standard specifies a test method for the determination of the long duration withdrawal strength of coated and uncoated dowel-type fasteners in structural timber and timber products and wood based products for structural application. The method applies to all types of nails, screws and staples. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1382, Timber Structures — Test methods — Withdrawal capacity of timber fasteners EN 26891:1991, Timber structures — Joints made with mechanical fasteners — General principles for the determination of strength and deformation characteristics (ISO 6891:1983) EN ISO 8970, Timber structures — Testing of joints made with mechanical fasteners — Requirements for wood density (ISO 8970) ISO 13061-1, Physical and mechanical properties of wood — Test methods for small clear wood specimens — Part 1: Determination of moisture content for physical and mechanical tests ISO 13061-2, Physical and mechanical properties of wood — Test methods for small clear wood specimens — Part 2: Determination of density for physical and mechanical tests 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 reference withdrawal strength mean (50 % fractile) withdrawal strength of the tests carried out in accordance with EN 1382 3.2 load level percentage of the reference withdrawal strength 4 Symbols and abbreviations a staple crown width, in millimetres (see Figure 1) d is the outer thread diameter for screws, the diameter of the smooth plain part of a round nail or for staples the diameter of the wire (transformed to a round cross-section) (see EN 14592) Fmax maximum withdrawal load, in newtons kd,T duration of load factor for withdrawal load lp the effective depth of penetr
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