SIST EN 14081-3:2012/kprA1:2017

Timber structures - Strength graded structural timber with rectangular cross section - Part 3: Machine grading; additional requirements for factory production control

This European Standard specifies requirements additional to those given in EN 14081-1 for factory production control of 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.

Holzbauwerke - Nach Festigkeit sortiertes Bauholz für tragende Zwecke mit rechteckigem Querschnitt - Teil 3: Maschinelle Sortierung, zusätzliche Anforderungen an die werkseigene Produktionskontrolle

Structures en bois - Bois de structure à section rectangulaire classé pour sa résistance - Partie 3: Classement mécanique - Exigences complémentaires relatives au contrôle de la production en usine

Lesene konstrukcije - Razvrščanje konstrukcijskega lesa pravokotnega prečnega prereza po trdnosti - 3. del: Strojno razvrščanje - Dodatne zahteve za kontrolo proizvodnje v obratu

General Information

• Status: Not Published
• Public Enquiry End Date: 29-Jul-2016
• 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: 13-Nov-2018
• Due Date: 18-Nov-2018
• Completion Date: 13-Nov-2018
• 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
• Mandate: M/112 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on structural timber products
• Ref Project: EN 14081-3:2012/FprA1 - Timber structures - Strength graded structural timber with rectangular cross section - Part 3: Machine grading; additional requirements for factory production control

Relations

• Consolidated By: SIST EN 14081-3:2012+A1:2018 - Timber structures - Strength graded structural timber with rectangular cross section - Part 3: Machine grading; additional requirements for factory production control
• Effective Date: 18-Jan-2023
• Amends: SIST EN 14081-3:2012 - Timber structures - Strength graded structural timber with rectangular cross section - Part 3: Machine grading; additional requirements for factory production control
• Effective Date: 01-Jul-2016

Overview

SIST EN 14081-3:2012/kprA1:2017 is a European Standard developed by CEN focused on strength graded structural timber with rectangular cross sections. This part of the EN 14081 series specifies additional factory production control requirements for machine grading of timber. It applies to timber shaped by sawing, planing, or other methods, aligning with size tolerances from EN 336. The standard aims to ensure high accuracy and reliable quality in automated timber grading processes, supporting consistent structural performance.

Key Topics

• Machine grading systems: Requirements for output controlled systems where grading machines adapt settings based on timber quality.
• Factory production control: Strict protocols for ongoing quality monitoring in production batches, beyond basic provisions in EN 14081-1.
• Sampling and testing: Defined minimum sampling rates (at least 0.2% of production, minimum 10 specimens) with random selection to capture timber variability.
• Destructive testing methods: Procedures for edgewise bending or tension strength, modulus of elasticity, density, and moisture content following EN 384 and EN 408, with specific adaptations for factory control.
• Verification and marking: Criteria requiring calculated characteristic values to meet or exceed declared strength classes for batch certification; downgrading rules apply if verification fails.
• Documentation and record-keeping: Detailed traceability obligations including machine settings, operator identity, moisture content, yield, test results, and grading verification outcomes.

Applications

EN 14081-3 is essential for manufacturers and quality control personnel involved in structural timber production. Its implementation supports:

• Automated strength grading in sawmills and wood processing factories.
• Compliance with European timber construction regulations.
• Reliable supply of strength classified timber for load-bearing timber structures such as beams, joists, and framing components.
• Enhanced product performance consistency benefiting architects, engineers, builders, and end-users by ensuring safety and structural integrity.

Related Standards

• EN 14081-1: Strength graded structural timber – General requirements.
• EN 14081-2: Machine grading systems – Requirements and test methods.
• EN 384: Structural timber – Determination of characteristic mechanical properties and density.
• EN 408: Structural timber – Determination of mechanical properties.
• EN 336: Structural timber – Dimensions.
• EN 13183-2 & EN 13183-3: Moisture content measurement methods for sawn timber.
• EN 14358: Timber structures – Calculation and verification of characteristic values.

By adhering to SIST EN 14081-3:2012/kprA1:2017, producers ensure that machine graded timber meets rigorous performance benchmarks, enhancing trust and reliability in construction-grade wood products across Europe and internationally.

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 14081-3:2012/oprA1:2016
01-julij-2016
/HVHQHNRQVWUXNFLMH5D]YUãþDQMHNRQVWUXNFLMVNHJDOHVDSUDYRNRWQHJDSUHþQHJD
SUHUH]DSRWUGQRVWLGHO6WURMQRUD]YUãþDQMH'RGDWQH]DKWHYH]DNRQWUROR
SURL]YRGQMHYREUDWX
Timber structures - Strength graded structural timber with rectangular cross section -
Part 3: Machine grading; additional requirements for factory production control
Holzbauwerke - Nach Festigkeit sortiertes Bauholz für tragende Zwecke mit
rechteckigem Querschnitt - Teil 3: Maschinelle Sortierung, zusätzliche Anforderungen an
die werkseigene Produktionskontrolle
Structures en bois - Bois de structure à section rectangulaire classé pour sa résistance -
Partie 3: Classement mécanique - Exigences complémentaires relatives au contrôle de
la production en usine
Ta slovenski standard je istoveten z: EN 14081-3:2012/prA1
ICS:
79.040 Les, hlodovina in žagan les Wood, sawlogs and sawn
timber
91.080.20 Lesene konstrukcije Timber structures
SIST EN 14081-3:2012/oprA1:2016 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST EN 14081-3:2012/oprA1:2016

SIST EN 14081-3:2012/oprA1:2016

DRAFT
EUROPEAN STANDARD
EN 14081-3:2012
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
May 2016
ICS 79.040
English Version
Timber structures - Strength graded structural timber
with rectangular cross section - Part 3: Machine grading;
additional requirements for factory production control
Structures en bois - Bois de structure à section Holzbauwerke - Nach Festigkeit sortiertes Bauholz für
rectangulaire classé pour sa résistance - Partie 3: tragende Zwecke mit rechteckigem Querschnitt - Teil
Classement mécanique - Exigences complémentaires 3: Maschinelle Sortierung, zusätzliche Anforderungen
relatives au contrôle de la production en usine an die werkseigene Produktionskontrolle
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 124.

This draft amendment A1, if approved, will modify the European Standard EN 14081-3:2012. If this draft becomes an
amendment, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
inclusion of this amendment into the relevant national standard without any alteration.

This draft amendment 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, 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
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

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14081-3:2012/prA1:2016 E
worldwide for CEN national Members.

SIST EN 14081-3:2012/oprA1:2016
EN 14081-3:2012/prA1:2016 (E)
Contents Page
European foreword . 3
1 Modifications to Clause 2, Normative references . 4
2 Modifications to Clause 3, Terms and definitions . 4
3 Modification to Clause 4, Symbols. 4
4 Modifications to Clause 6, Additional factory production control requirements for
output controlled systems . 4
5 Modification to Annex B (informative), Additional factory production control
requirements for output controlled systems . 6
6 Modification to Annex C (informative), Example of cusum control charts . 6
7 Modifications to the Bibliography . 6

SIST EN 14081-3:2012/oprA1:2016
EN 14081-3:2012/prA1:2016 (E)
European foreword
This document (EN 14081-3:2012/prA1:2016) 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 has been prepared under a mandate given to CEN by the European Commission and
...