Qualitative classification of softwood round timber - Part 3: Larches and Douglas fir

This Standard specifies the qualitative classification for the roundwood of larches (Larix) and Douglas fir (Pseudotsuga). The classification is made either using Clauses 4 and 5 or using informative Annex A. Clauses 4 and 5 describe the qualitative classification of round timber for which the intended use is unknown.
Annex A gives a list of characteristics which serves as guideline for contracts describing qualities for round timber of larches and Douglas fir where the intended use is known.

Qualitäts-Sortierung von Nadel-Rundholz - Teil 3: Lärchen und Douglasie

Diese Norm legt die Qualitäts-Sortierung für Rundholz von Lärchen (Larix) und Douglasie (Pseudotsuga) fest.
Die Sortierung wird entweder nach den Abschnitten 4 und 5 oder nach Anhang A vorgenommen. Die Abschnitte
4 und 5 beschreiben die verwendungsneutrale Qualitäts-Sortierung (Qualitäts-Sortierung von Holz,
dessen Verwendung noch nicht bekannt ist).
Der informative Anhang A gibt eine Liste von Merkmalen für die Qualitäts-Sortierung von Holz, dessen beabsichtigte
Verwendung bekannt ist, an, die als Leitfaden für Verträge angesehen werden kann.

Classement qualitatif des bois ronds résineux - Partie 3 : Mélèzes et Douglas

La présente Norme européenne spécifie le classement qualitatif des bois ronds de mélèze (Larix) et de
douglas (Pseudotsuga). Le classement est réalisé soit en utilisant les articles 4 et 5 soit en utilisant
l’Annexe A. Les articles 4 et 5 décrivent le classement qualitatif des bois ronds dont la destination n’est pas
connue.
L’Annexe informative A donne une liste des caractéristiques qui sert de guide à des contrats fixant les qualités
des bois ronds de mélèze et de Douglas, dont la destination est connue.

Razvrščanje okroglega lesa iglavcev po kakovosti - 3. del: Macesni in duglazije

General Information

Status
Published
Publication Date
25-Mar-2008
Withdrawal Date
29-Sep-2008
ICS
79.040 - Wood, sawlogs and sawn timber
Technical Committee
CEN/TC 175 - Round and sawn timber
Drafting Committee
CEN/TC 175/WG 4 - Round timber
Current Stage
9093 - Decision to confirm - Review Enquiry
Start Date
11-Jun-2024
Completion Date
14-Apr-2025
Ref Project
SIST EN 1927-3:2008 - Qualitative classification of softwood round timber - Part 3: Larches and Douglas fir

Relations

Replaces
ENV 1927-3:1998 - Qualitative classification of softwood round timber - Part 3: Larches and douglas firs
Effective Date
22-Dec-2008

Overview

EN 1927-3:2008 - Qualitative classification of softwood round timber (Part 3: Larches and Douglas fir) is a CEN European Standard that defines a qualitative grading system for roundwood of larches (Larix) and Douglas fir (Pseudotsuga). The standard provides two complementary approaches:

  • Clauses 4 and 5: prescriptive grading rules for round timber when the intended use is unknown (four quality classes A, B, C, D).
  • Annex A (informative): a checklist of characteristics to be used when the intended use is known, serving as guidance for contracts.

Key topics and technical requirements

  • Quality classes A–D: general descriptions (A = first quality, D = usable but low quality) and more detailed limits are given in tabulated form for each species.
  • Species identification: classification should be completed with the Latin name or ISO species symbol (e.g., Pseudotsuga → PSES).
  • Measured characteristics (used to assign grade): knots (intergrown, dead, unsound), resin pockets, rate of growth, spiral grain, eccentric pith, sweep, taper, shakes (heart and ring), insect attack (e.g., Trypodendron, Sirex), rot, stain.
  • Measurement methods: assessments and measurements refer to EN 1309-2, EN 1310 and EN 1311.
  • Grading rules:
    • All listed characteristics in the relevant tables must be considered when assigning a class.
    • Hidden or doubtful flaws should be exposed and reassessed.
    • Certain defects (insect attack, rot, stain) generally cannot be compensated by better performance in other characteristics; limited compensation may be agreed contractually.
    • A log may be graded into more than one class using theoretical crosscut points (minimum length 3 m).

Practical applications and users

This standard is intended for professionals involved in the supply chain and quality control of softwood round timber:

  • Forest owners and loggers - for sorting and marketing larch and Douglas fir roundwood.
  • Sawmills and timber merchants - to grade incoming roundwood and specify product quality.
  • Procurement officers and contract writers - to define contractual quality requirements using Annex A when the end use is known.
  • Inspectors, log graders and QC personnel - to apply consistent, repeatable grading rules across Europe.
  • Engineers, architects and specifiers - to reference accepted grading when sourcing timber for structural or specialized uses.

Related standards

  • EN 1927 series: EN 1927-1 (Spruces and firs), EN 1927-2 (Pines)
  • Measurement & terminology: EN 1309-2, EN 1310, EN 1311, EN 844 series (terminology), ISO 2036

Keywords: EN 1927-3:2008, qualitative classification, softwood round timber, larches, Douglas fir, roundwood grading, timber quality classes, CEN standard.

Frequently Asked Questions

EN 1927-3:2008 is a standard published by the European Committee for Standardization (CEN). Its full title is "Qualitative classification of softwood round timber - Part 3: Larches and Douglas fir". This standard covers: This Standard specifies the qualitative classification for the roundwood of larches (Larix) and Douglas fir (Pseudotsuga). The classification is made either using Clauses 4 and 5 or using informative Annex A. Clauses 4 and 5 describe the qualitative classification of round timber for which the intended use is unknown. Annex A gives a list of characteristics which serves as guideline for contracts describing qualities for round timber of larches and Douglas fir where the intended use is known.

This Standard specifies the qualitative classification for the roundwood of larches (Larix) and Douglas fir (Pseudotsuga). The classification is made either using Clauses 4 and 5 or using informative Annex A. Clauses 4 and 5 describe the qualitative classification of round timber for which the intended use is unknown. Annex A gives a list of characteristics which serves as guideline for contracts describing qualities for round timber of larches and Douglas fir where the intended use is known.

EN 1927-3:2008 is classified under the following ICS (International Classification for Standards) categories: 79.040 - Wood, sawlogs and sawn timber. The ICS classification helps identify the subject area and facilitates finding related standards.

EN 1927-3:2008 has the following relationships with other standards: It is inter standard links to ENV 1927-3:1998. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

EN 1927-3:2008 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


SLOVENSKI STANDARD
01-julij-2008
1DGRPHãþD
SIST ENV 1927-3:2003
5D]YUãþDQMHRNURJOHJDOHVDLJODYFHYSRNDNRYRVWLGHO0DFHVQLLQGXJOD]LMH
Qualitative classification of softwood round timber - Part 3: Larches and Douglas fir
Qualitäts-Sortierung von Nadel-Rundholz - Teil 3: Lärchen und Douglasie
Classement qualitatif des bois ronds résineux - Partie 3 : Mélezes et Douglas
Ta slovenski standard je istoveten z: EN 1927-3:2008
ICS:
79.040 Les, hlodovina in žagan les Wood, sawlogs and sawn
timber
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 1927-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2008
ICS 79.040 Supersedes ENV 1927-3:1998
English Version
Qualitative classification of softwood round timber - Part 3:
Larches and Douglas fir
Classement qualitatif des bois ronds résineux - Partie 3 : Qualitäts-Sortierung von Nadel-Rundholz - Teil 3: Lärchen
Mélèzes et Douglas und Douglasie
This European Standard was approved by CEN on 23 February 2008.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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 and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1927-3:2008: E
worldwide for CEN national Members.

Contents Page
Foreword.3
1 Scope .4
2 Normative references .4
3 Terms and definitions .4
4 Qualitative classification for which the intended use is unknown.5
5 Rules for grading .6
6 Additional criteria .8
Annex A (informative) Qualitative classification for which the intended use is known.9

Foreword
This document (EN 1927-3:2008) 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 September 2008, and conflicting national standards shall be
withdrawn at the latest by September 2008.
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.
This document will supersede ENV 1927-3:1998.
EN 1927 consists of the following parts with the main title Qualitative classification of softwood round timber:
 EN 1927-1, Spruces and firs
 EN 1927-2, Pines
 EN 1927-3, Larches and Douglas fir
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, 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 and the United Kingdom.
1 Scope
This Standard specifies the qualitative classification for the roundwood of larches (Larix) and Douglas fir
(Pseudotsuga). The classification is made either using Clauses 4 and 5 or using informative Annex A.
Clauses 4 and 5 describe the qualitative classification of round timber for which the intended use is unknown.
Annex A gives a list of characteristics which serves as guideline for contracts describing qualities for round
timber of larches and Douglas fir where the intended use is known.
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 844-1:1995, Round and sawn timber — Terminology — Part 1: General terms common to round timber
and sawn timber
EN 844-2:1997, Round and sawn timber — Terminology — Part 2: General terms relating to round timber
EN 844-5:1997, Round and sawn timber — Terminology — Part 5: Terms relating to dimensions of round
timber
EN 844-7:1997, Round and sawn timber — Terminology — Part 7: Terms relating to anatomical structure of
timber
EN 844-8:1997, Round and sawn timber — Terminology — Part 8: Terms relating to the features of round timber
EN 844-9:1997, Round and sawn timber — Terminology — Part 9: Terms relating to features of sawn timber
EN 844-10:1998, Round and sawn timber — Terminology — Part 10: Terms relating to stain and fungal attack
EN 844-12:2000, Round and sawn timber— Terminology — Part 12: Additional terms and general index
EN 1309-2, Round and sawn timber — Method of measurement of dimensions — Part 2: Round timber –
Requirements for measurement and volume calculation rules
EN 1310, Round and sawn timber — Method of measurement of
...

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