oSIST prEN 14081-1:2012

Timber structures - Strength graded structural timber with rectangular cross section - Part 1: General requirements

This European Standard specifies the requirements for visual and machine graded structural timber with rectangular cross-sections shaped by sawing, planing or other methods, and having deviations from the target sizes corresponding to EN 336.
This European Standard consists of provisions for test methods, evaluation of conformity (ITT and FPC) and marking of both grading types of structural timber.
NOTE   For the machine graded timber additional provisions for ITT are given in EN 14081-2 and for FPC in EN 14081-3.
This European Standard identifies as a minimum the characteristics for which limits shall be given in visual grading rules.
This European Standard covers structural rectangular timber, untreated or treated against biological attack.
This European Standard does not cover timber treated by fire retardant products to improve its fire performance.
Finger jointed timber made of rectangular cross-sections is not covered in this European Standard.

Holzbauwerke - Nach Festigkeit sortiertes Bauholz für tragende Zwecke mit rechteckigem Querschnitt - Teil 1: Allgemeine Anforderungen

Diese Europäische Norm legt die Anforderungen an visuell und maschinell sortiertes Bauholz für tragende Zwecke mit rechteckigem Querschnitt fest, das durch Sägen, Hobeln oder andere Verfahren geformt wurde und Mindestmaße nach EN 336 aufweist.
Die vorliegende Europäische Norm besteht aus Bestimmungen für Prüfverfahren, die Bewertung der Konformität (Erstprüfung und WPK) sowie die Kennzeichnung beider Sortierarten für Bauholz für tragende Zwecke.
ANMERKUNG   Für maschinell sortiertes Holz sind zusätzliche Bestimmungen für die Erstprüfung in der EN 14081 2 sowie für die WPK in EN 14081 3 angegeben.
Diese Europäische Norm legt als Mindest-Eigenschaften diejenigen fest, für die Grenzwerte in den visuellen Sortierregeln angegeben sind.
Diese Europäische Norm gilt für Bauholz für tragende Zwecke mit rechteckigem Querschnitt, das entweder unbehandelt ist oder gegen biologischen Befall behandelt wurde.
Bauholz, das mit Feuerschutzmitteln behandelt wurde, um sein Verhalten bei Brandeinwirkung zu verbessern, ist nicht Gegenstand dieser Europäischen Norm.
Keilgezinktes Bauholz mit rechteckigem Querschnitt ist nicht Gegenstand dieser Europäischen Norm.

Structures en bois - Bois de structure à section rectangulaire classé pour sa résistance - Partie 1: Exigences générales

La présente Norme européenne prescrit les exigences applicables au bois de structure à section rectangulaire classé visuellement et par machine, profilé par sciage, rabotage ou d’autres méthodes, et ayant des dimensions minimales conformes à l'EN 336.
La présente Norme européenne est constituée de dispositions relatives aux méthodes d'essai, à l'évaluation de la conformité (ITT et CPU) et au marquage pour les deux types de classement du bois de structure.
NOTE   Pour le bois classé par machine, des dispositions supplémentaires sont spécifiées dans l'EN 14081-2 pour les ITT et dans l'EN 14081-3 pour le CPU.
La présente Norme européenne identifie, au minimum, les caractéristiques pour lesquelles des limites sont établies dans les règles de classement visuel.
La présente Norme européenne couvre le bois de structure à section rectangulaire, non traité ou traité contre les attaques biologiques.
La présente Norme européenne ne couvre pas le bois traité par des produits ignifuges pour améliorer sa performance au feu.
Le bois avec aboutages à entures multiples constitué de sections rectangulaires n’est pas couvert par la présente Norme européenne.

Lesene konstrukcije - Razvrščanje konstrukcijskega lesa pravokotnega prečnega prereza po trdnosti - 1. del: Splošne zahteve

General Information

• Status: Not Published
• Public Enquiry End Date: 29-Sep-2012
• ICS: 79.040 - Wood, sawlogs and sawn timber
• ICS: 91.080.20 - Timber structures
• Technical Committee: KON.005 - Timber structures
• Current Stage: 98 - Abandoned project (Adopted Project)
• Start Date: 07-Oct-2013
• Due Date: 12-Oct-2013
• Completion Date: 11-Oct-2013
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Mandate: M/112 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on structural timber products
• Ref Project: prEN 14081-1 rev - Timber structures - Strength graded structural timber with rectangular cross section - Part 1: General requirements

Relations

• Revised: SIST EN 14081-1:2006+A1:2011 - Timber structures - Strength graded structural timber with rectangular cross section - Part 1: General requirements
• Effective Date: 08-Jun-2022
• Revised: SIST EN 14081-1:2006+A1:2011 - Timber structures - Strength graded structural timber with rectangular cross section - Part 1: General requirements
• Effective Date: 29-Nov-2010
• Revised: SIST EN 14081-1:2006 - Timber structures - Strength graded structural timber with rectangular cross section - Part 1: General requirements
• Effective Date: 02-Oct-2010

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2012
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SUHUH]DSRWUGQRVWLGHO6SORãQH]DKWHYH
Timber structures - Strength graded structural timber with rectangular cross section -
Part 1: General requirements
Holzbauwerke - Nach Festigkeit sortiertes Bauholz für tragende Zwecke mit
rechteckigem Querschnitt - Teil 1: Allgemeine Anforderungen
Structures en bois - Bois de structure à section rectangulaire classé pour sa résistance -
Partie 1: Exigences générales
Ta slovenski standard je istoveten z: prEN 14081-1 rev
ICS:
79.040 Les, hlodovina in žagan les Wood, sawlogs and sawn
timber
91.080.20 Lesene konstrukcije Timber structures
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
DRAFT
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2012
ICS 79.040 Will supersede EN 14081-1:2005+A1:2011
English Version
Timber structures - Strength graded structural timber with
rectangular cross section - Part 1: General requirements
Structures en bois - Bois de structure à section Holzbauwerke - Nach Festigkeit sortiertes Bauholz für
rectangulaire classé pour sa résistance - Partie 1: tragende Zwecke mit rechteckigem Querschnitt - Teil 1:
Exigences générales Allgemeine Anforderungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 124.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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 CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14081-1 rev:2012: E
worldwide for CEN national Members.

prEN 14081-1:2012 (E)
Contents Page
Foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Symbols . 9
5 Requirements for structural timber . 9
5.1 Strengths, modulus of elasticity and density . 9
5.1.1 General on grading . 9
5.1.2 Visual strength grading . 9
5.1.3 Machine strength grading . 9
5.2 Dimensional stability . 11
5.3 Fire resistance R . 11
5.4 Reaction to fire . 11
5.5 Durability against biological attack . 12
5.5.1 Timber without preservative treatment . 12
5.5.2 Timber with preservative treatment . 12
6 Evaluation of conformity . 12
6.1 General . 12
6.2 Initial Type Testing – Type Testing . 12
6.2.1 General . 12
6.2.2 Test samples, testing and compliance criteria . 13
6.2.3 Test reports . 14
6.3 Factory production control (FPC) . 14
6.3.1 General . 14
6.3.2 Requirements . 14
6.3.3 Product specific requirements . 16
6.3.4 Initial inspection of factory and of FPC . 17
6.3.5 Continuous surveillance of FPC . 17
6.3.6 Procedure for modifications . 18
7 Marking, labelling and packaging . 18
7.1 General . 18
7.2 Information either on the timber (method A) or on its package (method B) . 18
7.3 Information in the documents accompanying either the timber or package of such
timber . 19
Annex A (normative) Requirements for strength reducing characteristics for visual grading
standards . 23
A.1 Limitations for strength-reducing characteristics . 23
A.1.1 Knots . 23
A.1.2 Slope of grain . 23
A.1.3 Density and rate of growth . 23
A.1.4 Fissures. 24
A.2 Limitations for geometrical characteristics . 24
A.2.1 Wane . 24
A.2.2 Warp . 24
A.3 Limitations for biological characteristics . 25
A.4 Other characteristics . 25
A.4.1 Reaction wood . 25
A.4.2 Other criteria . 25
prEN 14081-1:2012 (E)
Annex B (informative) Marking codes for single species . 26
Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU
Construction Products Directive . 28
ZA.1 Scope and relevant characteristics . 28
ZA.2 Procedure for attestation of conformity of strength graded structural timber with
rectangular cross section . 30
ZA.2.1 Systems of attestation of conformity . 30
ZA.2.2 EC Certificate and Declaration of conformity . 31
ZA.3 CE marking and labelling . 32
ZA.3.1 General . 32
ZA.3.2 Simplified CE marking . 32
ZA.3.3 Complete CE marking . 33

prEN 14081-1:2012 (E)
Foreword
This document (prEN 14081-1:2012) has been prepared by Technical Committee CEN/TC 124 “Timber
Structures”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 14081-1:2005+A1:2011.
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.
For relationship with EU Directive, see informative Annex ZA, which is an integral part of this document.
Other parts of the series of EN 14081 are:
EN 14081-2, Timber structures - Strength graded structural timber with rectangular cross section - Part 2:
Machine grading; additional requirements for initial type testing,
EN 14081-3, Timber structures - Strength graded structural timber with rectangular cross section - Part 3:
Machine grading; additional requirements for factory production control,
prEN 14081-1:2012 (E)
Introduction
There are basically two methods of strength grading: visual grading and machine grading.
Machine grading is in common use in a number of countries. The countries use two basic systems, referred
to as 'output controlled' and 'machine controlled'. Both systems require a visual override inspection to cater
for strength-reducing characteristics that are not automatically sensed by the machine. The output-
controlled system is suitable for use where the grading machines are situated in sawmills grading limited
sizes, species and grades in repeated production runs. This enables the system to be controlled by testing
timber specimens from the daily output. These tests together with statistical procedures are used to monitor
and adjust the machine settings to maintain the required strength properties for each strength class. With
this system it is permissible for machine approval requirements to be less demanding and for machines of
the same type to have non-identical performance.
The machine controlled system was developed in Europe. Because of the large number of sizes, species
and grades used it was not possible to carry out quality-control tests on timber specimens drawn from
production. The system relies therefore, on the m
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