EN 1912:2004+A2:2008
(Main)Structural timber - Strength classes - Assignment of visual grades and species
Structural timber - Strength classes - Assignment of visual grades and species
This document lists visual strength grades, species and sources of timber, and specifies the strength classes
from EN 338, to which they are assigned.
NOTE For the grades, species and sources included, there is long experience of use and/or satisfactory test data.
The sources listed are therefore largely determined by existing commercial practice.
Bauholz für tragende Zwecke - Festigkeitsklassen - Zuordnung von visuellen Sortierklassen und Holzarten
Dieses Dokument gibt visuelle Festigkeitsklassen, Holzarten und deren Herkunft an und legt die Festigkeitsklassen nach EN 338 fest, denen sie zugeordnet sind.
ANMERKUNG Für die angegebenen Sortierklassen, Holzarten und Herkünfte liegen langjährige praktische Erfahrungen und/oder befriedigende Prüfdaten vor. Die angegebene Herkunft orientiert sich daher weitestgehend an der gewerblichen Praxis.
Bois de structure - Classes de résistance - Affectation des classes visuelles des essences
Le présent document répertorie les classes visuelles de résistance, les essences et les origines de bois et spécifie
les classes de résistance, fixées par l’EN 338, auxquelles elles se rapportent.
NOTE Pour les classes, essences et origines d’approvisionnement incluses, on doit pouvoir justifier d’une grande expérience
d’utilisation et/ou de données d’essais satisfaisantes. Les origines sont donc largement déterminées par la pratique
commerciale existante.
Konstrukcijski les - Trdnostni razredi - Določitev trdnostnih razredov na podlagi vizualnega razvrščanja in vrste lesa
General Information
- Status
- Withdrawn
- Publication Date
- 01-Apr-2008
- Withdrawal Date
- 19-May-2009
- Technical Committee
- CEN/TC 124 - Timber structures
- Drafting Committee
- CEN/TC 124/WG 2 - Solid timber
- Current Stage
- 9960 - Withdrawal effective - Withdrawal
- Start Date
- 20-May-2009
- Completion Date
- 20-May-2009
Relations
- Effective Date
- 19-Jan-2023
- Effective Date
- 19-Jan-2023
- Merged From
EN 1912:2004/prA2 - Structural timber - Strength classes - Assignment of visual grades and species - Effective Date
- 18-Jan-2023
- Consolidates
EN 1912:2004 - Structural timber - Strength classes - Assignment of visual grades and species - Effective Date
- 22-Dec-2008
- Amended By
EN 1912:2004/prA3 - Structural timber - Strength classes - Assignment of visual grades and species - Effective Date
- 22-Dec-2008
Frequently Asked Questions
EN 1912:2004+A2:2008 is a standard published by the European Committee for Standardization (CEN). Its full title is "Structural timber - Strength classes - Assignment of visual grades and species". This standard covers: This document lists visual strength grades, species and sources of timber, and specifies the strength classes from EN 338, to which they are assigned. NOTE For the grades, species and sources included, there is long experience of use and/or satisfactory test data. The sources listed are therefore largely determined by existing commercial practice.
This document lists visual strength grades, species and sources of timber, and specifies the strength classes from EN 338, to which they are assigned. NOTE For the grades, species and sources included, there is long experience of use and/or satisfactory test data. The sources listed are therefore largely determined by existing commercial practice.
EN 1912:2004+A2:2008 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 1912:2004+A2:2008 has the following relationships with other standards: It is inter standard links to EN 1912:2004+A3:2009, EN 1912:2004+A1:2007, EN 1912:2004/prA2, EN 1912:2004, EN 1912:2004/prA3. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 1912:2004+A2:2008 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2008
.RQVWUXNFLMVNLOHV7UGQRVWQLUD]UHGL'RORþLWHYWUGQRVWQLKUD]UHGRYQDSRGODJL
YL]XDOQHJDUD]YUãþDQMDLQYUVWHOHVD
Structural timber - Strength classes - Assignment of visual grades and species
Bauholz für tragende Zwecke - Festigkeitsklassen - Zuordnung von visuellen
Sortierklassen und Holzarten
Bois de structure - Classes de résistance - Affectation des classes visuelles des
essences
Ta slovenski standard je istoveten z: EN 1912:2004+A2:2008
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 1912:2004+A2
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2008
ICS 79.040 Supersedes EN 1912:2004+A1:2007
English Version
Structural timber - Strength classes - Assignment of visual
grades and species
Bois de structure - Classes de résistance - Affectation des Bauholz für tragende Zwecke - Festigkeitsklassen -
classes visuelles des essences Zuordnung von visuellen Sortierklassen und Holzarten
This European Standard was approved by CEN on 10 September 2004 and includes Amendment 1 approved by CEN on 28 December
2006 and Amendment 2 approved by CEN on 2 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 1912:2004+A2:2008: E
worldwide for CEN national Members.
Contents
page
Foreword.3
1 Scope .4
2 Normative references .4
3 Terms and definitions .4
4 Symbols and abbreviations .4
5 Requirements.5
6 Assignments to strength classes .5
Annex A (informative) Grading standards .13
Bibliography .15
Foreword
This document (EN 1912:2004+A2:2008) 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 October 2008 and conflicting national standards shall be withdrawn at
the latest by October 2008.
This document includes Amendment 1 approved on 2006-12-28 and Amendment 2, approved by CEN on
2008-02-02.
This document supersedes #EN 1912:2004+A1:2007$.
The start and finish of text introduced or altered by amendment is indicated in the text by tags ! " and
#$.
This revised version contains assignments of additional grades and species.
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 United Kingdom.
1 Scope
This document lists visual strength grades, species and sources of timber, and specifies the strength classes
from EN 338, to which they are assigned.
NOTE For the grades, species and sources included, there is long experience of use and/or satisfactory test data.
The sources listed are therefore largely determined by existing commercial practice.
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 384, Structural timber - Determination of characteristic values of mechanical properties and density
#EN 14081 (all parts), Timber structures - Strength graded structural timber with rectangular cross
section$
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
timber source
geographical area of growth of the trees from which the timber is sawn
3.2
timber species
individual species or combination of species
3.3
Nordic countries
Denmark, Finland, Iceland, Norway and Sweden
4 Symbols and abbreviations
CNE Europe Central, Northern and Eastern Europe
NNE Europe Northern and North Eastern Europe
NC Europe Northern and Central Europe
5 Requirements
5.1 The grades referred to in Tables 1 and 2 shall be in accordance with a grading standard meeting the
requirements of #EN 14081$.
5.2 Timber of a grade, species and source may be assigned to a strength class and listed in this document
provided there is long experience of use and/or test data in accordance with EN 384.
NOTE 1 Where the required information becomes available for a grade, species and source not included in this
document, preliminary assignment to a strength class, pending revision of this document, may be obtained from CEN/TC
124.
NOTE 2 The assignments of grades, species and sources to strength classes given in this document should be
reassessed when this document is reviewed, or sooner if there is reason to suspect that the mechanical properties and/or
density of the timber have changed, or the basis for the existing assessment no longer represents the current situation, e.g.
if there has been a change in the source.
6 Assignments to strength classes
Timber grades, species and sources listed, meet the requirements of the strength classes to which they are
assigned in Table 1 and Table 2.
Table 3 and Table 4 identify the botanical species for the commercial names listed in Table 1 and Table 2.
NOTE 1 Timber graded by machine to #EN 14081$ may be graded directly to the strength classes and marked
accordingly, and is therefore not referenced in this document.
NOTE 2 For combinations of species and visual grades, which meet the requirements of #EN 14081$, but are not
listed in this standard, the assignment to strength classes can be made according to EN 338 using characteristic values
determined in accordance with EN 384.
Table 1 — Assignment of grades of conifer species and poplar to strength classes
#
Strength Grading rule Grade Species commercial Source Botanical Comments
Class publishing (see name (see note 2) identification
country note 4) (see Table 3)
(see note 1 at
end of Table)
C35 Germany S13 Douglas Fir Germany 54
C30 France ST-I Spruce & Fir France 1, 22
Germany & S13 Spruce CNE Europe 22
Austria S13 Pine CNE Europe 47
S13 Fir CNE Europe 1
S13 Larch CNE Europe 15
Nordic T3 Pine (Redwood) NNE Europe 47
countries T3 Spruce (Whitewood) NNE Europe 22
T3 Fir NNE Europe 1
T3 Larch NNE Europe 15
USA J&P Sel Southern pine USA 35, 36, 43, 48
SLF Sel Southern pine USA 35, 36, 43, 48
Spain ME1 Laricio pine Spain 39
Slovak S0 Spruce Slovak Republic 22
Republic
C 27 France ST-I Larch France 15
Spain ME1 Scots pine Spain 47
C24 France ST-II Spruce & Fir France 1, 22
ST-II Douglas Fir France 54
ST-II Pines France 39, 44, 47
ST-II Poplar (see note 3) France 50
ST-II Larch France 15
Germany S10 Douglas Fir Germany 54
Germany & S10 Spruce CNE Europe 22
Austria S10 Pine CNE Europe 47
S10 Fir CNE Europe 1
S10 Larch CNE Europe 15
Nordic T2 Pine (Redwood) NNE Europe 47
countries T2 Spruce (Whitewood) NNE Europe 22
T2 Fir NNE Europe 1
T2 Larch NNE Europe 15
T2 & Sitka spruce Denmark and 28
better Norway
Spain ME1 Radiata pine Spain 49
ME1 Maritime pine Spain 44
C24 USA & J&P Sel Douglas fir-Larch USA & Canada 18, 54
Canada J&P Sel Hem-fir USA & Canada 2, 4, 5, 7, 8, 62
J&P Sel S-P-F USA & Canada 3, 6, 23, 25, 26,
27, 32, 34, 45
SLF Sel Douglas fir-Larch USA & Canada 18, 54
SLF Sel Hem-fir USA & Canada 2, 4, 5, 7, 8, 62
SLF Sel S-P-F USA & Canada 3, 6, 23, 25, 26,
27, 32, 34, 45
UK SS Paraná pine Brazil 12
SS Redwood CNE Europe 47
SS Whitewood CNE Europe 1, 22
SS Douglas fir-Larch USA & Canada 18, 54
SS Hem-fir USA & Canada 2, 4, 5, 7, 8, 62
SS S-P-F USA & Canada 3, 6, 23, 25, 26,
27, 32, 34, 45
SS Southern pine USA 35, 36, 43, 48
SS Caribbean pitch pine Caribbean 33, 42
SS Larch UK 15, 16, 17
Slovak SI Spruce Slovak Re
...
SIST EN 1912:2004+A2:2008は、構造用木材の強度等級を視覚的に分類し、使用される種とその出所を明確に定める重要な文書です。この標準は、EN 338に基づいて強度等級を割り当てるためのガイドラインを提供しており、構造用木材の信頼性を確保するために欠かせないものです。 この標準の強みは、長年の使用経験や満足のいく試験データに基づいており、収録されている等級、種、出所は商業実務に根ざしている点です。これにより、業界関係者は、視覚的に指定された強度等級に従って木材を評価し、適切な資源を選択することが可能になります。 さらに、SIST EN 1912:2004+A2:2008は、建設業界全体における安全性と整合性を高める役割を果たしています。この標準に準拠することで、設計者や施工者は、選定した木材の強度とその適用範囲に対する信頼性を確保し、品質の高い構造物を提供できます。 全体として、この標準は構造用木材の視覚的強度等級に関する規範を提供し、業界のベストプラクティスを強化する上で極めて重要です。特に、商業的な実践を考慮した上での明確なガイドラインは、木材を扱う全てのプロフェッショナルにとって大きな利点となるでしょう。
표준 EN 1912:2004+A2:2008은 구조용 목재의 강도 등급과 시각적 등급 및 종(species)의 할당에 대한 문서로, 이 문서는 유럽에서 목재의 강도 클래스를 정의하는 EN 338과의 연관성을 명확히 하고 있습니다. 이 표준의 범위는 목재의 시각적 강도 등급과 해당 종 및 출처를 나열하고 있으며, 각 강도 클래스에 대한 명확한 할당을 제공합니다. 이 문서에서 다루는 등급, 종, 출처는 오랜 사용 경험과 만족스러운 시험 데이터를 바탕으로 설정되어 있어 신뢰성을 높이고 있습니다. 특히, 이 표준은 산업 내 기존 상업 관행에 크게 의존하고 있어 실제적인 적용 가능성이 매우 높습니다. EN 1912는 목재 구조물의 품질 관리와 안전성을 확보하는 데 중요한 역할을 하며, 구조용 목재의 선택과 사용에 있어 일관된 기준을 제공하는 강점이 있습니다. 이를 통해 건축 및 엔지니어링 분야에서 목재 사용의 표준화와 수명 주기 평가에 기여할 수 있습니다. 또한, 이 표준은 품질 보증 및 규제 준수를 위한 효과적인 도구로 작용하며, 다양한 목재 제품의 신뢰성을 높이는 데 필수적인 역할을 합니다. EN 1912:2004+A2:2008은 목재 산업과 관련된 모든 이해관계자에게 유용한 참고 자료가 될 것으로 예상되며, 현대 건축 기술의 발전에 필요한 기초를 제공합니다.
The standard EN 1912:2004+A2:2008 provides a comprehensive framework for the assignment of visual grades and species within the domain of structural timber. Its primary scope focuses on detailing the visual strength grades, species, and sources of timber, alongside the specification of strength classes in alignment with EN 338. This standard effectively addresses the critical need for consistency and reliability in timber grading, ensuring that manufacturers and builders can reference a single, authoritative source for strength class assignment. One of the standout strengths of EN 1912:2004+A2:2008 is its reliance on long-standing experience and durable testing data regarding the grades, species, and sources of timber included. This emphasis on empirical evidence fosters trust and confidence within the industry, as users can be assured of the safety and performance of the timber specified. Moreover, the focus on existing commercial practices for sourcing timber lends considerable relevance to the standard, making it not just theoretically sound but also practically applicable in real-world scenarios. The integration of visual grading into strength class assignments is another noteworthy feature that enhances the usability of EN 1912:2004+A2:2008. By enabling a visual assessment of timber before assignment to a strength class, the standard simplifies the decision-making process for timber merchants, architects, and construction engineers. This visual grading approach is particularly advantageous, as it streamlines the quality assurance process while ensuring adherence to established strength classifications. Given its thorough and well-structured approach, EN 1912:2004+A2:2008 is a vital resource for professionals working with structural timber. Its comprehensive listing of visual strength grades and emphasis on timber species not only facilitates improved communication within the supply chain but also reinforces the overall quality and safety standards within the timber industry. The relevance of this standard is clear, as it aligns with both historical practices and contemporary needs, ensuring that it remains a critical guide in timber construction practices.
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