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1313-2:1999
Incorporating Corrigendum No 1
The European Standard EN 1313-2:1998 has the status of a
British Standard
ICS 79.040
NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW
Round and sawn timber Ð
Permitted deviations and
preferred sizes Ð
Part 2: Hardwood sawn timber
Trang 2BS EN 1313-2:1999
This British Standard, having
been prepared under the
direction of the Sector
Committee for Building and Civil
Engineering, was published under
the authority of the Standards
Committee and comes into effect
on 15 March 1999
BSI 08-2000
ISBN 0 580 32079 0
Amendments issued since publication
10981 Corrigendum No 1
August 2000 Indicated by a sideline
National foreword
This British Standard is the English language version of EN 1313-2:1998, including corrigendum August 2000 It supersedes BS 5450:1977 which is withdrawn
The UK participation in its preparation was entrusted by Technical Committee B/543, Round and sawn timber, to Subcommittee B/543/2, Sawn timber, which has the responsibility to:
Ð aid enquirers to understand the text;
Ð present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed;
Ð monitor related international and European developments and promulgate them in the UK
A list of organizations represented on this subcommittee can be obtained on request
to its secretary
National annex NA (informative) contains the recommended reduction of sawn hardwood by processing
Cross-references
The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled ªInternational Standards Correspondence Indexº, or by using the ªFindº facility of the BSI Standards Electronic Catalogue
Informative reference
BS 5756:1997, Specification for visual strength grading of hardwood.
A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application
Compliance with a British Standard does not of itself confer immunity from legal obligations.
Summary of pages
This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 4, an inside back cover and a back cover
The BSI copyright notice displayed in this document indicates when the document was last issued
Trang 3European Committee for Standardization Comite EuropeÂen de Normalisation EuropaÈisches Komitee fuÈr Normung
Central Secretariat: rue de Stassart 36, B-1050 Brussels
1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members
Ref No EN 1313-2:1998 E
ICS 79.040 Incorporating corrigendum June 1999 Descriptors: wood, sawlogs, sawn timber, hardwood, dimensional deviations, dimensional stability, humidity, dimensions
English version
Round and sawn timber Ð Permitted deviations and preferred sizes Ð
Part 2: Hardwood sawn timber
Bois ronds et bois scieÂs Ð Ecarts
admissibles et dimensions preÂfeÂrentielles Ð
Partie 2: Bois scieÂs feuillus
Rund- und Schnittholz Ð ZulaÈssige Abweichungen und Vorzugsmảe Ð Teil 2: Laubschnittholz
This European Standard was approved by CEN on 8 November 1998
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 Central Secretariat 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 Central Secretariat has the
same status as the official versions
CEN members are the national standards bodies of Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and
United Kingdom
Trang 4Page 2
EN 1313-2:1998
BSI 08-2000
Foreword
This European Standard 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 May 1999, and
conflicting national standards shall be withdrawn at
the latest by May 1999
According to the CEN/CENELEC Internal Regulations,
the national standards organizations of the following
countries are bound to implement this European
Standard: Austria, Belgium, Czech Republic, Denmark,
Finland, France, Germany, Greece, Iceland, Ireland,
Italy, Luxembourg, Netherlands, Norway, Portugal,
Spain, Sweden, Switzerland and the United Kingdom
This standard is one of two concerning permitted
deviations and preferred sizes of sawn timber
The other standard is:
EN 1313-1, Round and sawn timber Ð Permitted
deviations and preferred sizes Ð Part 1: Softwood
sawn timber.
Contents
Page
5 Change in size due to changes in
Annex A (informative) Complementary
Trang 5Page 3
EN 1313-2:1998
BSI 08-2000
1 Scope
This European Standard specifies permitted deviations
and preferred sizes of European hardwood sawn
timber at a moisture content of 20 %
2 Normative references
This European Standard incorporates, by dated or
undated reference, provisions from other publications
These normative references are cited at the
appropriate places in the text and the publications are
listed hereafter For dated references, subsequent
amendments to or revisions of any of these
publications apply to this European Standard only
when incorporated in it by amendment or revision For
undated references, the latest edition of the publication
referred to applies
EN 336, Structural timber Ð Coniferous and poplar Ð
Sizes, permissible deviations.
EN 844-1, Round and sawn timber Ð Terminology Ð
Part 1: General terms common to round timber and
sawn timber.
EN 844-3, Round and sawn timber Ð Terminology Ð
Part 3: General terms relating to sawn timber.
EN 844-4, Round and sawn timber Ð Terminology Ð
Part 4: Terms relating to moisture content.
EN 844-6, Round and sawn timber Ð Terminology Ð
Part 6: Terms relating to dimensions of sawn timber.
EN 1309-1, Round and sawn timber Ð Method of
measurement of dimensions Ð Part 1: Sawn timber.
prEN 13183-1, Round and sawn timber Ð Method of
measurement of moisture content Ð Part 1: Method
for determining moisture content of a piece of sawn
timber (Oven-dry method).
prEN 13183-2, Round and sawn timber Ð Method of
measurement of moisture content Ð Part 2: Method
for estimating moisture content of a piece of sawn
timber (Electrical method).
3 Definitions
For the purposes of this standard, the definitions
contained in EN 844-1, EN 844-3, EN 844-4 and
EN 844-6 apply
4 Moisture content
The measurement of moisture content shall be carried
out according to prEN 13183-1 or prEN 13183-2
The reference moisture content is 20 %
5 Change in size due to changes in
moisture content
Unless there is evidence to the contrary, it is assumed
that the thickness and width of a piece of timber will
increase by 0,25 % for every 1 % of moisture content
higher than 20 % up to 30 %, and will decrease by 0,25 %
for every 1 % of moisture content lower than 20 % The
above values are independent of the species
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6 Permitted deviations
For a specified number of pieces of hardwood sawn timber of the same target thickness and/or width, the average thickness and/or width shall not be less than the target thickness and/or width
If the timber is for structural use, the permitted deviations shall be those specified in EN 336
The permitted deviations, at a moisture content of 20 %, are the following
6.1 On thicknesses (t)
t # 32 mm: 21 mm, +3 mm
t > 32 mm: 22 mm, +4 mm
The permitted deviations of thicknesses apply to all thicknesses, not only to preferred ones
6.2 On widths (b)
100 mm < b # 200 mm: 23 mm, +9 mm
b > 200 mm: 24 mm, +12 mm
6.3 On lengths (l)
Ð For unedged timber and boules:
0, +3 % of the target length but no more than 90 mm
Ð For square edged timber:
0, +3 % of the target length but no more than 90 mm
7 Preferred sizes
Sizes are measured according to EN 1309-1 at a moisture content of 20 %
7.1 Preferred thicknesses
20 mm, 27 mm, 32 mm, 40 mm, 50 mm, 60 mm,
65 mm, 70 mm, 80 mm and 100 mm
7.2 Preferred widths
10 mm intervals for widths between 50 mm and 90 mm
20 mm intervals for widths of 100 mm or more
7.3 Preferred lengths
For unedged timber and boules:
0,10 m intervals for lengths between 2,00 m and 6,00 m For square edged timber:
0,05 m intervals where l # 1,00 m 0,10 m intervals where l > 1,00 m
Trang 6Page 4
EN 1313-2:1998
BSI 08-2000
Annex A (informative)
Complementary national sizes
Complementary preferred sizes in Germany
(DE)
Thicknesses (in millimetres):
18
22 Thickness of the board for all standardized pallets
24 Standardized thickness of the industrial packages
25
30
35
45
52
63
78 Thickness of the blocks for all the standardized pallets
Width (in millimetres):
145 Width of the boards in standardized pallets,
especially in Euro-pallets
Complementary preferred sizes in France (FR)
Thicknesses (in millimetres):
35, 55
Complementary preferred sizes in the United Kingdom (GB)
Thicknesses (in millimetres):
19, 26, 38, 52, 63, 75
Complementary preferred sizes in Ireland (IR)
Thicknesses (in millimetres):
25, 38, 63, 75
Complementary preferred sizes in Italy (IT)
Width (in millimetres):
250
Complementary preferred sizes in the Netherlands (NL)
Thicknesses (in millimetres):
15, 18, 26, 34, 41, 45, 52, 54, 63, 75
Complementary preferred sizes in Norway (NO)
Widths (in millimetres):
63, 75, 125, 150, 250
Trang 7 BSI 08-2000
BS EN 1313-2:1999
National annex NA (informative)
Reduction of sawn hardwoods by processing
NA.1 General
Processing of hardwoods to accurate finished sizes involves reductions in size which vary with the size, the process and the product The figures in Table NA.1 have been established in the United Kingdom as being economic, workable and not wasteful
NA.2 Reductions
The recommended reductions appropriate to some end uses and products appear in Table NA.1 Any finished sizes in British Standards covering particular hardwood products and components will take precedence over those in Table NA.1 For other end uses not specifically mentioned, the same figures as those for one of the end uses listed may be adopted Intermediate figures would be unlikely to achieve any greater accuracy and would tend to confuse
If the timber is for structural use, the reduction limits specified in BS 5756 apply
NA.3 Permitted deviations
For all finished sizes after processing, permitted deviations of±0,5 mm are recommended.
If the timber is for structural use, the permitted deviations specified in BS EN 336 apply
Table NA.1 Ð Recommended reductions from sawn size to finished target size by processing of
two opposite faces
Dimensions in millimetres
End use or product Reduction from sawn size to finished target size
For target sizes of width or thickness
Floorings, matchings and
interlocked boarding and
planed all round
Joinery and cabinet
wood
Trang 8BS EN
1313-2:1999
BSI
389 Chiswick High Road
London
W4 4AL
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