National foreword

This British Standard is the UK implementation of EN 1309‑3:2018. It supersedes BS EN 1311:1997 and BS EN 1310:1997, which are withdrawn.

The UK participation in its preparation was entrusted to Technical Committee B/543, Round and sawn timber.

A list of organizations represented on this committee can be obtained on request to its secretary.

This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2018.

This European Standard was approved by CEN on 29 October 2017.

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 CEN-CENELEC 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 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

European foreword

This document (EN 1309‑3:2018) has been prepared by Technical Committee CEN/TC 175 “Round and sawn timber”, 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of an identical text or by endorsement, at the latest by July 2018, and conflicting national standards shall be withdrawn at the latest by July 2018.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 1310:1997 and EN 1311:1997.

This standard is one of a series, and covers methods of measurement for round timber and sawn timber.

Other standards in this series are:

EN 1309‑1 Round and sawn timber - Method of measurement of dimensions – Part 1: Sawn timber
EN 1309‑2 Round and sawn timber - Method of measurement of dimensions – Part 2: Round timber

According to the CEN-CENELEC Internal Regulations, the national standards organisations 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

1 Scope

This European Standard specifies the methodology for measurement of features – in relation to wood structure, biological agencies and other damage – taken into account in the visual grading:

for appearance – of sawn, processed and round timber;
for serviceability – of sawn and processed timber (identified in EN 1611‑1 as the integrity of the timber).

When the standard is applied the methodology of measurement used shall be stated.

It is not applicable to structural timber for which strength grading in accordance with EN 14081‑1 is required.

This standard applies to hardwood and softwood sawn timber, both square edged and un-edged, to processed timber and to round timber.

It does not apply to tropical timber.

2 Normative references

3 Terms and definitions

4 Symbols

5 Sawn and processed timber

5.1 Knots

5.2 Resin pocket

5.3 Reaction wood

5.4 Grain

5.5 Rate of growth

5.6 Bark pocket

5.7 Sapwood

5.8 Wane

5.9 Fissure

5.10 Warp

6 Round timber

6.1 Features of the form of the log

6.2 Features of the structure of the wood

6.3 Sapwood

6.4 Included sapwood

6.5 False heartwood

6.6 Knots

6.7 Cracks

6.8 Biological degradation

6.9 Other defects

6.10 Tapping cut

6.11 Foreign bodies

6.12 Resin pocket

6.13 Other damage

7 Biological degrade

7.1 Sawn timber

7.2 Round timber

BS EN 1309-3:2018

Round and sawn timber. Methods of measurements - Features and biological degradations

Current

Published:

31 May 2018