Sawn timber - Assessment of drying quality

This European Standard defines a method of assessment of drying quality. It applies to a lot of dried sawn timber (surfaced or not). It applies to both softwood and hardwood with a thickness not greater than 100 mm.
The quality of drying is expressed in terms of moisture content: target, average of the lot and variation between the pieces of the lot.
An option for specifying the degree of case-hardening is included.
NOTE 1   Other features related to drying, e.g. check, shake, warp, stain, etc., are specified in documents for visual grading of sawn timber or in product specifications and are not covered by this document.
NOTE 2   In the following the term "sawn timber" is used for all dried timber covered by this scope.

Schnittholz - Ermittlung der Trocknungsqualität

Diese Europäische Norm legt ein Verfahren zur Bestimmung der Trocknungsqualität fest. Sie gilt für ein Los getrocknetes Schnittholz (oberflächenbearbeitet oder nicht). Es gilt für Nadelholz und Laubholz mit einer Dicke bis 100 mm.
Die Trocknungsqualität wird angegeben als Feuchtegehalt: Soll Feuchte (Zielfeuchte) und Ist Feuchte (mittlere Holzfeuchte) des Loses und der Streuung zwischen den Stücken des Loses.
Außerdem wird die Angabe des Verschalungsgrades beschrieben.
ANMERKUNG 1   Andere Merkmale mit Bezug zur Trocknung, wie z. B. seichte Risse, Risse, Verformungen, Verfärbungen usw., sind in Normen für visuelle Sortierung von Schnittholz oder Produktspezifikationen festgelegt und werden nicht in dieser Norm behandelt.
ANMERKUNG 2   Im Folgenden wird die Benennung "Schnittholz" für jegliches getrocknetes Holz verwendet, das zum Anwendungsbereich dieser Norm gehört.

Bois scié - Estimation de la qualité du séchage

La présente Norme européenne définit une méthode d'estimation de la qualité du séchage. Cette méthode s'applique à un lot de bois sciés secs (surfacés ou non). Elle s’applique à la fois aux bois résineux et aux bois feuillus d’épaisseur inférieure ou égale à 100 mm.
La qualité du séchage est exprimée sous forme de teneur en humidité : teneur en humidité cible, teneur en humidité moyenne du lot et variation entre les pièces du lot.
Une option permettant de spécifier le degré de cémentation est incluse.
NOTE 1   Les autres critères qualitatifs relatifs au séchage (par exemple, les gerces, les fentes, les déformations, les discolorations, etc.) sont spécifiés dans les documents relatifs au classement visuel des bois sciés ou dans les spécifications de produit et ne sont pas couverts par le présent document.
NOTE 2   Dans ce qui suit, le terme «bois scié» est utilisé pour tous les bois secs qui relèvent du présent domaine d’application.

Žagani les - Ocenjevanje kakovosti sušenja

Ta evropski standard opredeljuje metodo za ocenjevanje kakovosti sušenja. Uporablja se za številne vrste suhega žaganega lesa (tako površinsko obdelanega kot neobdelanega). Uporablja se za mehke in trde vrste lesa debeline največ 100 mm.
Kakovost sušenja je izražena glede na ciljno in povprečno vsebnost vlage serije ter opredeljuje razlike v vsebnosti vlage med posameznimi kosi, ki so izražene kot dovoljene zgornje in spodnje meje.
Vključena je tudi možnost za določanje ravni utrjevanja površinske plasti.
OPOMBA 1: Drugi elementi, povezani s sušenjem, npr. preverjanje, deformacije, madeži itd. so določeni v dokumentih za vizualno ocenjevanje žaganega lesa ali v specifikacijah izdelkov in niso zajeti v tem dokumentu.
OPOMBA 2: V nadaljevanju se izraz »žagani les« uporablja za ves suhi les, ki spada na področje uporabe.

General Information

Status
Published
Publication Date
24-Oct-2017
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
25-Oct-2017
Completion Date
25-Oct-2017

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Žagani les - Ocenjevanje kakovosti sušenjaSchnittholz - Ermittlung der TrocknungsqualitätBois scié - Estimation de la qualité du séchageSawn timber - Assessment of drying quality79.040Les, hlodovina in žagan lesWood, sawlogs and sawn timberICS:Ta slovenski standard je istoveten z:EN 14298:2017SIST EN 14298:2018en,fr,de01-januar-2018SIST EN 14298:2018SLOVENSKI

STANDARDSIST EN 14298:20051DGRPHãþD
SIST EN 14298:2018
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14298
October
t r s y ICS
y {ä r v r Supersedes EN
s v t { zã t r r vEnglish Version

Sawn timber æ Assessment of drying quality Bois scié æ Estimation de la qualité du séchage

Schnittholz æ Ermittlung der Trocknungsqualität This European Standard was approved by CEN on

v September
t r s yä

egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä

translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä

CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels

t r s y CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN

s v t { zã t r s y ESIST EN 14298:2018

EN 14298:2017 (E) 2 Contents Page European foreword ....................................................................................................................................................... 3 1 Scope .................................................................................................................................................................... 4 2 Normative references .................................................................................................................................... 4 3 Terms and definitions ................................................................................................................................... 4 4 Symbols and abbreviations ......................................................................................................................... 5 5 Drying quality specification ........................................................................................................................ 5 5.1 General ................................................................................................................................................................ 5 5.2 Standard drying quality ................................................................................................................................ 5 5.3 Specific end-use drying ................................................................................................................................. 6 6 Assessment by control of drying quality of a lot of sawn timber ................................................... 6 6.1 General ................................................................................................................................................................ 6 6.2 Sampling ............................................................................................................................................................. 7 6.3 Moisture content ............................................................................................................................................. 7 6.4 Criteria drying quality ................................................................................................................................... 8 6.4.1 Moisture content ............................................................................................................................................. 8 6.4.2 Case-hardening ................................................................................................................................................ 8 6.5 Test report ......................................................................................................................................................... 8 Annex A (informative)

Example for an assessment of standard drying quality 12 % ........................ 9 A.1 General ................................................................................................................................................................ 9 A.2 Sampling ............................................................................................................................................................. 9 A.3 Measurements .................................................................................................................................................. 9 A.4 Assessment of drying quality ...................................................................................................................... 9 A.5 Conclusion....................................................................................................................................................... 10 SIST EN 14298:2018

EN 14298:2017 (E) 3 European foreword This document (EN 14298:2017) 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 April 2018, and conflicting national standards shall be withdrawn at the latest by April 2018. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 14298:2004. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 14298:2018

EN 14298:2017 (E) 4 1 Scope This European Standard defines a method of assessment of drying quality. It applies to a lot of dried sawn timber (surfaced or not). It applies to both softwood and hardwood with a thickness not greater than 100 mm. The quality of drying is expressed in terms of moisture content: target, average of the lot and variation between the pieces of the lot. An option for specifying the degree of case-hardening is included. NOTE 1 Other features related to drying, e.g. check, shake, warp, stain, etc., are specified in documents for visual grading of sawn timber or in product specifications and are not covered by this document. NOTE 2 In the following the term “sawn timber” is used for all dried timber covered by this scope. 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 844-3:1995, Round and sawn timber — Terminology — Part 3: General terms relating to sawn timber EN 844-4:1997, Round and sawn timber — Terminology — Part 4: Terms relating to moisture content EN 844-12:2000, Round and sawn timber — Terminology — Part 12: Additional terms and general index EN 1438, Symbols for timber and wood-based products EN 13183-1, Moisture content of a piece of sawn timber — Part 1: Determination by oven dry method EN 13183-2, Moisture content of a piece of sawn timber — Part 2: E

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