SIST EN 14250:2005
(Main)Timber structures - Product requirements for prefabricated structural members assembled with punched metal plate fasteners
Timber structures - Product requirements for prefabricated structural members assembled with punched metal plate fasteners
This document specifies product requirements for prefabricated structural members (e.g. trusses, beams and girders) for use in buildings and bridges made from members of structural timber (with or without finger joints) assembled with punched metal plate fasteners.
The standard also covers methods to carry out the evaluation of conformity and the marking.
Holzbauwerke - Produktanforderungen an vorgefertigte Fachwerkträger mit Nagelplatten
Dieses Dokument legt Produktanforderungen an vorgefertigte tragende Bauteile (z. B. Fachwerkträger, Balken und Träger), die aus Bauteilen aus Bauholz für tragende Zwecke (mit oder ohne Keilzinkenverbindungen) unter Verwendung von Nagelplatten gefertigt wurden und die für die Verwendung in Gebäuden und Brücken bestimmt sind, fest.
Dieses Dokument enthält auch Verfahren zur Ausführung der Konformitätsbeurteilung und Kennzeichnung.
Structures en bois - Exigences des produits relatives aux éléments de structure préfabriqués utilisant des connecteurs a plaque métallique emboutie
Domaine d'application
La présente Norme Européenne fixe les exigences de produits relatives aux fermes préfabriquées assemblées au moyen de connecteurs a plaque métallique emboutie.
Lesene konstrukcije – Zahteve za proizvodnjo predhodno izdelanih konstrukcijskih elementov s kovinskimi ježastimi ploščami
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Timber structures - Product requirements for prefabricated structural members assembled with punched metal plate fastenersStructures en bois - Exigences des produits relatives aux éléments de structure préfabriqués utilisant des connecteurs a plaque métallique emboutieHolzbauwerke - Produktanforderungen an vorgefertigte Fachwerkträger mit NagelplattenTa slovenski standard je istoveten z:EN 14250:2004SIST EN 14250:2005en91.080.20ICS:SIST EN 1059:20001DGRPHãþDSLOVENSKI
STANDARDSIST EN 14250:200501-maj-2005
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14250
November 2004 ICS 91.080.20 Supersedes EN 1059:1999 English version
Timber structures - Product requirements for prefabricated structural members assembled with punched metal plate fasteners
Structures en bois - Exigences de produits relatives aux fermes préfabriquées utilisant des connecteurs à plaque métallique emboutie
Holzbauwerke - Produktanforderungen an vorgefertigte Fachewerkträger mit Nagelplatten This European Standard was approved by CEN on 22 July 2004.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36
B-1050 Brussels © 2004 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14250:2004: E
EN 14250:2004 (E) 2 Contents page Foreword.3 1 Scope.4 2 Normative references.4 3 Terms and definitions.5 4 Material requirements.6 4.1 Timber.6 4.1.1 Grading.6 4.1.2 Finger jointed timber.6 4.1.3 Resistance to biological organisms.6 4.2 Punched metal plate fasteners.6 5 Product requirements.7 5.1 Strength and stiffness.7 5.2 Reaction to fire.7 5.3 Structural members.8 5.3.1 Timber sizes.8 5.3.2 Wane.8 5.3.3 Joint gaps.8 5.3.4 Moisture content.8 5.3.5 Dimensional accuracy.8 5.3.6 Camber.8 5.4 Joints.8 5.4.1 Live knots.8 5.4.2 Dead knots or fissures.9 5.4.3 Fastener positioning.9 5.4.4 Fastener embedment.9 5.4.5 Protruding fasteners.9 6 Product documents.9 7 Evaluation of conformity.9 7.1 General.9 7.2 Initial type testing and assessment.10 7.3 Factory production control.10 7.3.1 General.10 7.3.2 Daily control.11 7.3.3 Weekly control.11 7.3.4 Regular control.11 7.3.5 Records.11 8 Marking.12 Annex ZA
(informative)
Clauses of this European standard addressing the provisions of the EU Constructions Products Directive.13 ZA.1 Scope and relevant characteristics.13 ZA.2 Procedure for attestation of conformity of prefabricated structural members assembled with punched metal plate fasteners.14 ZA.2.1 System of attestation of conformity.14 ZA.2.2 Certificate and Declaration of conformity.15 ZA.3 CE marking and labelling.16 Bibliography.18
EN 14250:2004 (E) 3 Foreword This document (EN 14250:2004) has been prepared by Technical Committee CEN/TC 124 “Timber structures”, the secretariat of which is held by SFS. 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 May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005. This document supersedes EN 1059 :1999. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EN 14250:2004 (E) 4 1 Scope This document specifies product requirements for prefabricated structural members (e.g. trusses, beams and girders) for use in buildings and bridges made from members of structural timber (with or without finger joints) assembled with punched metal plate fasteners. The standard also covers methods to carry out the evaluation of conformity and the marking. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 335-1, Durability of wood and wood-based products – Definition of hazard classes of biological attack – Part 1: General. EN 335-2, Durability of wood and wood-based products – Definition of hazard classes of biological attack – Part 2: Application to solid wood. EN 336, Structural timber –Sizes , permitted deviations. EN 350-2, Durability of wood and wood-based products – Natural durability of solid wood – Part 2: Guide to natural durability and treatability of selected wood species of importance in Europe. EN 351-1, Durability of wood and wood-based products – Preservative-treated solid wood – Part 1: Classification of preservative penetration and retention. EN 385, Finger jointed structural timber – Performance requirements and minimum production requirements. EN 460, Durability of wood and wood-based products – Natural durability of solid wood – Guide to the durability requirements for wood to be used in hazard classes. EN 844-3, Round and sawn timber – Terminology – Part 3: General terms relating to sawn timber. EN 844-9, Round and sawn timber – Terminology – Part 9: Terms relating to features of sawn timber. EN 1310, Round and sawn timber – Method of measurement of features. EN 13183-2, Moisture content of a piece of sawn timber – Part 2: Estimation by electrical resistance method. EN 13501-1, Fire classification of construction products and building elements – Part 1: Classification using test data from reaction to fire tests. EN 13823, Reaction to fire tests for building products – Building products excluding floorings exposed to the thermal attack by a single burning item. prEN 14081-1, Timber structures – Strength graded structural timber with rectangular cross section – Part 1: General requirements. prEN 14545, Timber structures – Connectors – Requirements.
EN 14250:2004 (E) 5 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 anchorage area surface area of timber occupied by the plate projections in any particular member 3.2 batch all the structural members produced according to the same specifications in one shift 3.3 dead knot knot that on the surface considered is intergrown with the surrounding wood for less than one quarter of the cross-sectional perimeter, as defined in EN 844-9 3.4 effective thickness/width the target thickness/width as defined in EN 336 minus any wane present on the edge being considered 3.5 internal bracing element to prevent lateral buckling of a compression member 3.6 live knot (intergrown knot) knot that on the surface considered is intergrown with the surrounding wood for more than three quarters of the cross-sectional perimeter as defined in EN 844-9 3.7 plate projection plate tooth, plate nail or burst used for the purpose of transferring forces between members 3.8 punched metal plate fastener metal plate having integral projections punched out in one direction perpendicular to the base of the plate, being used to join two or more pieces of timber of the same thickness in the same plane
EN 14250:2004 (E) 6 4 Material requirements 4.1 Timber 4.1.1 Grading Timber shall be strength graded using grading standards and methods complying with prEN 14081-1. In addition to the specified grade requirements, timber shall meet the following criteria for spring, bow, twist and cup as defined in EN 844-3 and measured in accordance with EN 1310:
Spring:
4 mm maximum per 2 m length,
Bow:
6 mm maximum per 2 m length,
Twist:
2 mm maximum per 25 mm width per 2 m length,
Cup:
2 mm maximum per 100 mm of face. 4.1.2 Finger jointed timber Finger jointed timber shall meet the requirements of EN 385 for the appropriate service class.
4.1.3 Resistance to biological organisms The timber shall either have adequate natural durability in accordance with EN 350-2 for the intended service class as defined in EN 335-1 and EN 335-2, or be given a preservative treatment selected in accordance with EN 351-1 and EN 460. 4.2 Punched metal plate fasteners The fasteners shall fulfil the requirements of prEN 14545 and shall correspond to the fasteners specified in the design. If the timber is preservative treated against biological attacks and fire, the preservative used shall be compatible with the fastener’s treatment against corrosion. The fastener shall bear a mark that readily identifies the producer or supplier and the type of plate.
EN 14250:2004 (E) 7 5 Product requirements 5.1 Strength and stiffness The structural characteristics of the members shall be declared as either: 1) the geometrical and material properties of the components used, determined according to clause 4, sufficient to calculate the strength and stiffness of the structural members according to methods valid in the country of use (e.g. EN 1990, EN 1991 and prEN 1995-1-1 taking into account any National Annexes); or 2) a reference to national design documents produced (and held) by the manufacturer according to methods valid in the country of use (e.g. EN 1990, EN 1991 and prEN 1995-1-1 taking into account any National Annexes); or 3) a reference to the design documents produced by another party, together with information on the party responsible for the design. NOTE For the initial type testing or assessment according to the method of declaration, see clause 7 and for marking requirements, see clauses 8 and ZA.3. 5.2 Reaction to fire Where required, the reaction to fire class shall be declared by the producer. Structural elements made of timber in accordance with Table 1 may be classified without the need for further testing. Where the manufacturer seeks a higher classification (e.g. in the case of treated timber), the timber as a material shall be tested and classified in accordance with EN 13501-1, mounted, when tested according to EN 13823, in accordance with Footnote b of Table 1. Table 1 – Structural timber considered as classified without further testing Producta Product details Minimum densityc (kg/m3) Minimum thickness (mm) Classb Structural timber Visual and machine graded structural timber with rectangular cross-sections shaped by sawing, planing or other methods or with round cross-sections 350 22 D-s2, d0 a Applies to all species covered by the product standards. b Class as provided for in Commission Decision 2000/147/EC Annex Table 1. For testing, the whole area of both wings in the SBI apparatus is covered with timber pieces mounted edge to edge (b
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