Bsi bs en 01912 2012 (2013)

NORME EUROPÉENNE ICS 79.040 English Version Structural Timber - Strength classes - Assignment of visual grades and species Bois de structure - Classes de résistance - Affectation des c

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BSI Standards Publication

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

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National foreword

This British Standard is the UK implementation of EN 1912:2012, incorporating corrigendum August 2013 It supersedes

BS EN 1912:2004+A4:2010 which is withdrawn

The start and finish of text introduced or altered by corrigendum is indicated in the text by tags Text altered by CEN corrigendum August

2013 is indicated in the text by 

The UK participation in its preparation was entrusted to Technical Committee B/518, Structural 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 necessaryprovisions of a contract Users are responsible for its correctapplication

ISBN 978 0 580 84267 2ICS 79.040

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

This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 August 2012

Amendments/corrigenda issued since publication

30 September 2013 Implementation of CEN corrigendum August 2013

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NORME EUROPÉENNE

ICS 79.040

English 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

Incorporating corrigendum August 2013

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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 15

Bibliography 17

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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

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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

Machine grading; additional requirements for initial type testing

Machine grading; additional requirements for factory production control

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

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

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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

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Table 1 — Assignment of grades of conifer and poplar species to strength classes

Species commercial name

Source Botanical

identification (see Table 3)

Spruce Pine Fir Larch

CNE Europe CNE Europe CNE Europe CNE Europe

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

The

Netherlands

T3 T3 T3 T3

Larch

47

22

1

15

ST-II ST-II ST-II ST-II

Spruce & Fir Douglas Fir Pines Poplar (see note 1) Larch

France France France France France

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

Larch Sitka spruce

NNE Europe NNE Europe NNE Europe NNE Europe Denmark and Norway

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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

Douglas fir-Larch Hem-fir

S-P-F

S-P-F Southern pine Caribbean pitch pine Larch

Brazil CNE Europe CNE Europe USA & Canada USA & Canada USA & Canada USA

Netherlands

T2 T2 T2 T2

Larch

Douglas fir

Italy Italy

Spain Spain

47

39

Minimum thickness & width is 70mm

better No.1 &

better

S-P-F Douglas Fir – Larch Hem-fir

Canada Canada Canada

3, 6, 23, 25, 26,

27, 32, 34, 45 18,54

2, 4, 5, 7, 8, 62

better S2

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Comments

ST-III ST-III

Poplar (see note 3) Larch

France France

50

15 Germany &

Austria and

Czech

Republic

S7, S7K S7, S7K

Norway spruce Scots pine

CNE Europe CNE Europe

Ireland Ireland

Italy Italy

15

1, 22 Nordic

countries

T1 T1 T1 T1 T1

Larch Sitka spruce

NNE Europe NNE Europe NNE Europe NNE Europe Denmark &

Radiata pine Maritime pine Laricio pine Scots pine

Spain Spain Spain Spain

British spruce Caribbean pitch pine

Southern pine

Canada Canada USA

UK

UK Caribbean USA

Larch

Douglas Fir Fir

Larch

Germany &

Austria CNE Europe CNE Europe

Brazil CNE Europe CNE Europe

12

47

1, 22

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S-P-F Larch

Douglas fir-Larch Douglas fir-Larch Hem-fir

Hem-fir S-P-F S-P-F

USA & Canada USA & Canada USA & Canada USA & Canada USA & Canada USA & Canada

SLF No.2 SLF No.1 SLF No.2 SLF No.1 SLF No.2

Douglas fir-Larch Douglas fir-Larch Hem-fir

Hem-fir S-P-F S-P-F

USA & Canada USA & Canada USA & Canada USA & Canada USA & Canada USA & Canada

British spruce British pine

Canada Canada USA

Ireland Ireland

28

22

Canada J&P No.1

J&P No.2 J&P No.1 J&P No.2 SLF No.1 SLF No.2 SLF No.1 SLF No.2

Sitka spruce Sitka spruce Western red cedar Western red cedar Sitka spruce Sitka spruce Western red cedar Western red cedar

Canada Canada Canada Canada Canada Canada Canada Canada

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Strength

Class

Grading rule publishing country

Grade (see Note 2)

Comments

Nordic countries

T0 T0 T0 T0 T0

Larch Sitka spruce

NNE Europe NNE Europe NNE Europe NNE Europe Denmark &

Larch

47

22

1

15

NOTE 1 The assignments only apply to certain clones of poplar – see note under Table 3

NOTE 2 The grades listed in this table are specified in the grading standards given in Annex A

C14 France ST-IV Pines France 39, 47

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Table 2 — Assignment of grades of hardwood species to strength classes

Species commercial Name

South East Asia South East Asia

Balau/Bangkirai South East Asia 113, 114

Keruing Karri Opepe Merbau American white oak

South East Asia Western Australia West Africa, South East Asia USA

HS ST1 Gonfolo Alimiao French Guyana French Guyana 138

Maximum thickness

60 mm, maximum width

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

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D35 France HS ST1 Jaboty French Guyana 139

thickness

100 mm

NOTE The grades listed in this table are specified in the grading standards given in Annex A

LS10and better, LS10K and better

LS10 and better,

LS10K and better





LS10K and better





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Table 3 — Identification of conifer and poplar species

Botanical name Identification number Botanical name Identification number

Tsuga heterophylla Tsuga mertensiana

a For Populus (50) only the following clones apply:

Populus x euramericana cv “Robusta”,

Populus x euramericana cv “Dorskamp”,

Populus x euramericana cv “I 214” and

Populus x euramericana cv “I 4551”.

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Table 4 — Identification of hardwood species

number

Acer pseudoplatanus Castanea sativa Cylicodiscus gabunensis Harms

Dinizia excelsa Ducke Dipteryx odorata Willd Dicorynia guianensis Amsh Dipterocarpus spp Dryobalanops spp Erisma uncinatum Warm Erythrophleum ivorense A.Chev ;Erythrophleum suaveolens

Brenan Entandrophragma cylindricum Eucalyptus diversicolor Eucalyptus marginata Eucalyptus globulus Intsia bijuga Intsia palembanica Koompassia malaccensis Lophira alata Manikara bidentata Milicia excelsa Milicia regia Nauclea diderrichii Newtonia suaveolens Brenan Ocotea rodiaei

Shorea glauca Shorea maxwelliana Tectona grandis Tabebuia Spp Fagus sylvatica Quercus petraea Quercus robur Quercus alba Quercus rubra Qualea Spp: Ruizterania spp Fraxinus americana Fraxinus excelsior

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Annex A

(informative)

Grading standards

The requirements for the grades listed in Table 1 and Table 2 are given in the standards listed in Table A.1

Table A.1 — Grading standards Grading rule

publishing country

Austria S13, S13K

S10, S10K S7, S7K

Austrian Standard OENORM DIN 4074–1:2012 (sortiert als Kantholz) (graded as joist)

Sortierung von Holz nach der Tragfähigkeit,-Teil 1: Nadelschnittholz Canada J&P Sel

J&P No.1 J&P No.2 No.1 & better SLF Sel SLF No.1 SLF No.2

LF Const Stud

Canadian Standard NLGA: 2010 The National Grading Rule for Dimension Lumber (NGRDL)- (These grades are only acceptable when graded in combination with the export annex which gives the rules for compliance with EN 14081)

Czech Republic S13, S13K

S10, S10K S7, S7K

Czech Standard ČSN 73 2824-1:2004 and CSN 73 2824/Z1:2009 Třídĕní dřeva podle penosti – Část 1: Jehličnaté řezivo (idt DIN 4074-1:2003) (zatříděno jako stropnice) (Graded as a joist)

France French Standard NF B 52-001-1:2011

Règles d’utilisation du bois dans les constructions; Classement visuel pour emploi

en structure pour les principales essences résineuses et feuillues

Germany German Standard DIN 4074 Teil 1 (sortiert als Kantholz) (graded as joist)

Sortierung von Holz nach der Tragfähigkeit,- Teil 1: Nadelschnittholz, 2012 German Standard DIN 4074 Teil 5 (sortiert als Kantholz) (graded as joist) Sortierung von Holz nach der Tragfähigkeit - Teil 5: Laubschnittholz, 2003

Ireland SS

GS

Irish Standard IS 127:2002 Specification for the stress grading of softwood timber

ST IV HSST1



S13, S13K S10, S10K S7, S7K LS13, LS13K LS10 and better, LS10K and better





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Nordic countries T3

T2 T1 T0

Nordic grading rules – INSTA 142:2009 Nordic visual strength grading rules for timber

Portugal E Portuguese Standard NP 4305:1995

Madeira serrada de pinheiro bravo para estruturas

ME2 MEG MEF

Spanish Standard UNE 56.544:2009 Clasificación visual de la Madera aserrada para uso structural Spanish standard UNE 56-546:2007

Visual grading for structural timber : Hardwood species Slovak Republic S0

SI SII

Slovak Standard STN 49 1531:2001 Drevo na stavebné nosné konštrukcie Vizuálne triedenie podľa pevnosti Slovenia S10

British Standard BS 4978:2007+A1:2011 Visual strength grading of softwood

British Standard BS 5756:2007+A1:2011 Visual strength grading of hardwood

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Bibliography

[1] EN 338, Structural timber — Strength classes

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Tiêu đề	Structural timber — Strength classes — Assignment of visual grades and species
Trường học	British Standards Institution
Chuyên ngành	Standards
Thể loại	Standard
Năm xuất bản	2012
Thành phố	Brussels

Định dạng
Số trang	22
Dung lượng	1,34 MB