Structural Timber - Strength classes - Assignment of visual grades and species

This European Standard lists the visual strength grades, species and sources of timber, and specifies the strength classes to which they are assigned, as documented in EN 338.

Bauholz für tragende Zwecke - Festigkeitsklassen - Zuordnung von visuellen Sortierklassen und Holzarten

Diese Europäische Norm gibt visuelle Festigkeitsklassen, Holzarten und deren Herkunft an und legt die Festigkeits¬klassen 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 et 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 la norme européenne 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'essai 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

Ta evropski standard navaja trdnostne razrede na podlagi vizualnega razvrščanja, vrste in virov lesa ter določa trdnostne razrede, v katere so razvrščeni, kot so navedeni v standardu EN 338.

General Information

Status
Published
Public Enquiry End Date
24-Dec-2010
Publication Date
26-Sep-2012
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
26-Apr-2012
Due Date
01-Jul-2012
Completion Date
27-Sep-2012

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Bauholz für tragende Zwecke - Festigkeitsklassen - Zuordnung von visuellen Sortierklassen und HolzartenBois de structure - Classes de résistance - Affectation des classes visuelles et des essencesStructural Timber - Strength classes - Assignment of visual grades and species79.040Les, hlodovina in žagan lesWood, sawlogs and sawn timberICS:Ta slovenski standard je istoveten z:EN 1912:2012SIST EN 1912:2012en,fr,de01-oktober-2012SIST EN 1912:2012SLOVENSKI
STANDARDSIST EN 1912:2004+A4:20101DGRPHãþD



SIST EN 1912:2012



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1912
April 2012 ICS 79.040 Supersedes EN 1912:2004+A4:2010English Version
Structural Timber - Strength classes - Assignment of visual grades and species
Bois de structure - Classes de résistance - Affectation des classes visuelles et des essences
Bauholz für tragende Zwecke - Festigkeitsklassen - Zuordnung von visuellen Sortierklassen und Holzarten This European Standard was approved by CEN on 9 March 2012.
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, 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.
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 worldwide for CEN national Members. Ref. No. EN 1912:2012: ESIST EN 1912:2012



EN 1912:2012 (E) 2 Contents Page Foreword .31 Scope .42 Normative references .43 Terms and definitions .44 Symbols and abbreviations .45 Requirements .56 Assignments to strength classes .5Annex A (informative)
Grading standards . 15Bibliography . 17 SIST EN 1912:2012



EN 1912:2012 (E) 3 Foreword This document (EN 1912:2012) has been prepared by Technical Committee CEN/TC 124 “Timber structures”, 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 October 2012, and conflicting national standards shall be withdrawn at the latest by October 2012.
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 supersedes EN 1912:2004+A4:2010. 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, 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 the United Kingdom.
SIST EN 1912:2012



EN 1912:2012 (E) 4 1 Scope This European Standard lists the visual strength grades, species and sources of timber, and specifies the strength classes to which they are assigned, as documented in EN 338. NOTE For the grades, species and sources included, there is a long history of use and/or satisfactory test data. The sources listed therefore are largely determined by existing commercial practice. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. 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 14081-1, Timber structures — Strength graded structural timber with rectangular cross section — Part 1: General requirements 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 EN 14081-4, Timber structures — Strength graded structural timber with rectangular cross section — Part 4: Machine grading; grading machine settings for machine controlled systems 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 SIST EN 1912:2012



EN 1912:2012 (E) 5 5 Requirements 5.1 The grades referred to in Tables 1 and 2 shall be in accordance with a grading standard that meets 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 a long history 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
The 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. The accepted assignments to strength classes given in this European Standard are based on initial type testing (ITT) and initial type calculation (ITC). The ITT and ITC documentation from the manufacturers has been evaluated by CEN/TC124/WG2/TG1 and the accepted values given in an ITT report. This report is the basis for the attestation of conformity by the Notified Body conducting the certification of the producer’s factory production control (FPC). Further ITT reports may be used as documentation before the information they contain becomes available in an amendment or revision of this European Standard, EN 1912. SIST EN 1912:2012



EN 1912:2012 (E) 6 Table 1 — Assignment of grades of conifer and poplar species to strength classes
Strength Class Grading rule publishing country Grade (see Note 2) Species commercial name Source Botanical identification (see Table 3) Comments C35 Germany & Austria
S13, S13K Douglas Fir Germany & Austria 54
C30 France
ST-I
Spruce & Fir
France
1, 22
Germany, Austria & Czech Republic
S13, S13K S13, S13K S13, S13K S13, S13K
Spruce Pine Fir Larch
CNE Europe CNE Europe CNE Europe CNE Europe
22 47 1 15
Italy
S1
Douglas fir
Italy
54
Maximum width and thickness 100 mm Nordic countries
T3 T3 T3 T3 Pine (Redwood) Spruce (Whitewood) Fir Larch NNE Europe NNE Europe NNE Europe NNE Europe 47 22 1 15
Slovak Republic S0
Spruce Slovak Republic 22
Spain ME1 Laricio pine
Spain 39
The Netherlands T3 T3 T3 T3
Pine (Redwood) Spruce (Whitewood) Fir Larch NNE Europe NNE Europe NNE Europe NNE Europe 47 22 1 15
C27 France ST-I Larch France 15
Germany LS13 Poplar Germany 51
Spain ME1 Scots pine Spain 47
C24
France
ST-II ST-II ST-II ST-II ST-II
Spruce & Fir Douglas Fir Pines Poplar (see note 1) Larch
France France France France France
1, 22 54 39, 44, 47 50 15
Germany & Austria
S10, S10K Douglas Fir
Germany & Austria
54
Germany, Austria & Czech Republic S10, S10K S10, S10K S10, S10K S10, S10K Spruce Pine Fir Larch CNE Europe CNE Europe CNE Europe CNE Europe 22 47 1 15
Italy
S2 & better S2 & better
Corsican pine Spruce & fir
Italy Italy
39 1, 22
Nordic countries
T2 T2 T2 T2 T2 & better Pine (Redwood) Spruce (Whitewood) Fir Larch Sitka spruce NNE Europe NNE Europe NNE Europe NNE Europe Denmark and Norway
47 22 1 15 28
Slovak Republic SI Spruce Slovak Republic
22
SIST EN 1912:2012



EN 1912:2012 (E) 7 Strength Class Grading rule publishing country Grade (see Note 2) Species commercial name Source Botanical identification (see Table 3) Comments
Slovenia
S10 Spruce & fir
Slovenia 1, 22
Spain
ME1 ME1
Radiata pine Maritime pine
Spain Spain
49 44
Canada
J&P Sel J&P Sel J&P Sel
Douglas fir-Larch Hem-fir S-P-F
USA & Canada USA & Canada USA & Canada
18, 54 2, 4, 5, 7, 8, 62 3, 6, 23, 25, 26, 27, 32, 34, 45
Canada
SLF Sel SLF Sel SLF Sel
Douglas fir-Larch Hem-fir S-P-F
USA & Canada USA & Canada USA & Canada
18, 54 2, 4, 5, 7, 8, 62 3, 6, 23, 25, 26, 27, 32, 34, 45
UK SS SS SS SS SS SS
SS SS SS
Paraná pine Redwood Whitewood Douglas fir-Larch Hem-fir S-P-F
Southern pine Caribbean pitch pine Larch
Brazil CNE Europe CNE Europe USA & Canada USA & Canada USA & Canada
USA Caribbean UK
12 47 1, 22 18, 54 2,
...

SLOVENSKI STANDARD
oSIST prEN 1912:2010
01-december-2010
.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 et des
essences
Ta slovenski standard je istoveten z: prEN 1912
ICS:
79.040 Les, hlodovina in žagan les Wood, sawlogs and sawn
timber
oSIST prEN 1912:2010 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 1912:2010

---------------------- Page: 2 ----------------------
oSIST prEN 1912:2010


EUROPEAN STANDARD
DRAFT
prEN 1912
NORME EUROPÉENNE

EUROPÄISCHE NORM

August 2010
ICS 79.040 Will supersede EN 1912:2004+A4:2010
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 et des essences Zuordnung von visuellen Sortierklassen und Holzarten
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 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 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
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1912:2010: E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------
oSIST prEN 1912:2010
prEN 1912:2010 (E)
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

2

---------------------- Page: 4 ----------------------
oSIST prEN 1912:2010
prEN 1912:2010 (E)
Foreword
This document (prEN EN 1912:2010) 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 1912:2004+A4:2010.
This revised version contains assignments of additional grades and species.
3

---------------------- Page: 5 ----------------------
oSIST prEN 1912:2010
prEN 1912:2010 (E)
1 Scope
This European Standard 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 14081-1, Timber structures — Strength graded structural timber with rectangular cross section – Part 1:
General requirements
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
EN 14081-4, Timber structures — Strength graded structural timber with rectangular cross section – Part 4:
Machine grading; grading machine settings for machine controlled systems
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

4

---------------------- Page: 6 ----------------------
oSIST prEN 1912:2010
prEN 1912:2010 (E)
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
Czech S13 Fir CNE Europe 1
Republic 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
5

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oSIST prEN 1912:2010
prEN 1912:2010 (E)
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)
C 27 France ST-I Larch France 15

Germany LS13 Poplar Germany 51

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
Czech S10 Fir CNE Europe 1
Republic 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

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

C24 USA & SLF Sel Douglas fir-Larch USA & Canada 18, 54
Canada 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 Republic 22
Republic
6

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oSIST prEN 1912:2010
prEN 1912:2010 (E)
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)
C22 Germany LS10 & Poplar Germany 51
better

Spain MEG Scots pine Spain 47 Minimum
MEG Laricio pine Spain 39 thickness &
   width is 70mm
UK SS British pine UK 39, 47

USA J&P No.1 Southern pine USA 35, 36, 43, 48
J&P No.2 Southern pine USA 35, 36, 43, 48
SLF No.1 Southern pine USA 35, 36, 43, 48
SLF No.2 Southern pine USA 35, 36, 43, 48
C20 Canada No.1 & S-P-F Canada 3, 6, 23, 25, 26,
better  27, 32, 34, 45
No.1 & Douglas Fir – Larch Canada 18,54
better
No.1 & Hem-fir Canada 2, 4, 5, 7, 8, 62
better
C18 Canada J&P Sel Sitka spruce Canada 28
 J&P Sel Western red cedar Canada 58
 SLF Sel Sitka spruce Canada 28
 SLF Sel Western red cedar Canada 58

France ST-III Spruce & fir France 1, 22
 ST-III Douglas fi
...

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