BRITISH STANDARD BS EN 13183 1 2002 Incorporating Corrigendum No 1 Moisture content of a piece of sawn timber — Part 1 Determination by oven dry method The European Standard EN 13183 1 2002 has the st[.]
Trang 1BRITISH STANDARD BS EN
13183-1:2002
Incorporating Corrigendum No 1
Moisture content of a
piece of sawn timber —
Part 1: Determination by oven dry
method
The European Standard EN 13183-1:2002 has the status of a
British Standard
ICS 79.040
12&23<,1*:,7+287%6,3(50,66,21(;&(37$63(50,77('%<&23<5,*+7/$:
Trang 2BS EN 13183-1:2002
This British Standard, having
been prepared under the
direction of the Building and
Civil Engineering Sector Policy
and Strategy Committee, was
published under the authority
of the Standards Policy and
Strategy Committee on
8 May 2002
© BSI 18 December 2003
ISBN 0 580 39685 1
National foreword
This British Standard is the official English language version of
EN 13183-1:2002, including Corrigendum September 2003
The UK participation in its preparation was entrusted by Technical Committee B/543, Round and sawn timber, to Subcommittee B/543/1, Timber terminology and measurement, which has the responsibility to:
A list of organizations represented on this subcommittee can be obtained on request to its secretary
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 “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic
Catalogue
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.
interpretation, or proposals for change, and keep the UK interests informed;
promulgate them in the UK
Summary of pages
This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 5 and a back cover
The BSI copyright date displayed in this document indicates when the document was last issued
Amendments issued since publication
Trang 3EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
EN 13183-1
April 2002
ICS 79.040
English version
Moisture content of a piece of sawn timber - Part 1:
Determination by oven dry method
Teneur en humidité d'une pièce de bois scié - Partie 1:
Détermination par la méthode par dessiccation
Feuchtegehalt eines Stückes Schnittholz - Teil 1:
Bestimmung durch Darrverfahren
This European Standard was approved by CEN on 29 December 2001.
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 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 Management Centre 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, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
C O M I T É E U R O P É E N D E N O R M A L I S A T I O N
E U R O P Ä I S C H E S K O M I T E E F Ü R N O R M U N G
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved
worldwide for CEN national Members.
Ref No EN 13183-1:2002 E
Incorporating corrigendum September 2003
tuC a test o ecilsf furc lloces sstdna noi miminum m 02m idmni noisne teh ridetco noif teh gr,nia at a tsidecna of 0,m 3 frmo ne enoo dr teh toreh of the eceip (or m eht tainiop dt of ssel seceip t0 nah,6 m ol)gn Teh teb llahs ecils tse free from rew nisa doodn featruse hcus
sa rab,k tonks r dnaekcop nisets fI hcus featruse xetsi, tuc the tets f ecilsrmo teh aenrets raelc raae towards the ctnere of the test ( eceipsgiF eeure 1)
Trang 4EN 13183-1:2002 (E)
2
Contents
page
6 CALCULATION AND EXPRESSION OF THE RESULTS 5
Trang 5EN 13183-1:2002 (E)
3
Foreword
This document EN 13183-1:2002 has been prepared by CEN/TC175 "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 October 2002, and conflicting national standards shall be withdrawn at the latest by October 2002.
This standard is one of a series, dealing with methods of measurement for round timber and sawn timber.
Other standards in this series are:
EN 13183-2 : Moisture content of a piece of sawn timber - Part 2: Estimation by
electrical resistance method.
EN 1309-1 : Round and sawn timber Method of measurement of dimensions
-Part 1: Sawn timber.
EN 1310 : Round and sawn timber - Method of measurement of features.
EN 1311 : Round and sawn timber - Method of measurement of biological
degrade.
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, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
1 Scope
This European Standard defines the method for determining the moisture content of a piece of sawn timber.
This method is considered as the reference method.
This standard applies to sawn timber, and timber which has been planed or mechanically surfaced by other means.
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 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 (including amendments).
EN 844-1, Round and sawn timber - Terminology - Part 1: General terms common to round timber and sawn timber.
EN 844-3, Round and sawn timber - Terminology - Part 3: General terms relating to sawn timber.
Trang 6EN 13183-1:2002 (E)
4
EN 844-4, Round and sawn timber - Terminology - Part 4: Terms relating to moisture content.
EN 844-6, Round and sawn timber - Terminology - Part 6: Terms relating to dimensions of sawn timber.
EN 844-7, Round and sawn timber - Terminology - Part 7: Terms relating to anatomical structure of timber.
EN 844-9, Round and sawn timber - Terminology - Part 9: Terms relating to features of sawn timber.
EN 844-12, Round and sawn timber - Terminology - Part 12: Additional terms and general index.
3 Terms and definitions
For the purposes of this European Standard, the terms and definitions of EN 844-1, EN 844-3,
EN 844-4 , EN 844-6, EN 844-7, EN 844-9 and EN 844-12 apply.
4 Apparatus
Balance accurate to 0,1 g, if the mass of the test slice is likely to be more than 100 g in an oven dry state.
Balance accurate to 0,01 g, if the mass of the test slice is likely to be less than 100 g in an oven dry state.
Equipment for drying wood, ensuring free internal circulation of air and capable of maintaining
a temperature of (103 ± 2) °C.
5 Procedure
o ecils tset a tuCf fudna noitces ssorc ll miminum 02 mm midet ni noisnrid ehetcfo noi the
gr,nia tniop a ta yb ta m 003m from tiehre o dnef tht eeeceip ts , ro t taeh mitniop d fi theceip e
t ssel sihm 006 nam gnol The telahs ecils tsf eb lree from rew nisf dna dooetarusa hcus se rabk, ktonr dna sekcop nisetsfI hcus ftaeruxe setsi, tuc tht eef ecils tsrmo thraen etse raelc area otwadrht se ecnter of hte etp tsiece es(e Fiuger 1).
cnIorroptagni corriegmudn tpeSmereb 3002
Cut a test slice of full cross section and minimum 20 mm dimension in the direction of the grain, at a distance of 0,3 m from one end or the other of the piece (or at the mid point of pieces less than 0,6 m long) The test slice shall be free from resin wood and features such
as bark, knots and resin pockets If such features exist, cut the test slice from the nearest clear area towards the centre of the test piece (see Figure 1)
Trang 7EN 13183-1:2002 (E)
5
Dimensions in millimetres
Key
1 Test piece
2 Test slice
Figure 1 - Position of the test slice
Weigh the test slice immediately after cutting.
Dry the weighed test slice at a temperature of (103 ± 2) °C, until the difference in mass
between two successive weighings separated by an interval of 2 hours is less than 0,1 %.
If it is not possible to weigh the test slice immediately after cutting, put the test slice in a sealed container to prevent moisture change and weigh within 2 hours.
Carry out the dry weight measurement immediately after the test slice has been taken out of the oven.
In order to obtain accurate results, timber which contains high amounts of volatile
components (resin) should be dried under vacuum conditions (pressure < 100 Pa) , at low
temperature (max 50 °C) or in a desiccator containing an hygroscopic substance.
6 Calculation and expression of the results
Calculate the moisture content, , as a percentage by mass, using the formula:
m m
m x
0
100
where
m1 is the mass of the test slice before drying, in grams;
m0 is the mass of the oven dry test slice, in grams;
is the moisture content, in percent.
Express the result to the nearest 0,1 percentage point moisture content.
Trang 8BS EN
13183-1:2002
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