EN 320:2011

Particleboards and fibreboards - Determination of resistance to axial withdrawal of screws

This European Standard specifies a method for the determination of the resistance of fibreboards and particleboards to axial withdrawal of screws.

Spanplatten und Faserplatten - Bestimmung des achsenparallelen Schraubenausziehwiderstands

Diese Norm legt ein Verfahren zur Prüfung des achsenparallelen Schraubenziehdrehwiderstands an Faserplatten und Spanplatten fest.

Panneaux de particules et panneaux de fibres - Détermination de la résistance à l'arrachement des vis selon leur axe

La présente norme européenne prescrit une méthode pour la détermination de la résistance à I' arrachement
des vis, selon leur axe, des panneaux de fibres et des panneaux de particules.

Vlaknene plošče - Določanje odpornosti proti aksialnemu izvleku vijaka

Ta evropski standard opredeljuje metodo za določanje odpornosti vlaknenih plošč proti aksialnemu izvleku vijaka.

General Information

• Status: Published
• Publication Date: 26-Apr-2011
• Withdrawal Date: 30-Oct-2011
• ICS: 79.060.20 - Fibre and particle boards
• Technical Committee: CEN/TC 112 - Woodbased panels
• Drafting Committee: CEN/TC 112/WG 11 - Particleboards and fibreboards
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 24-May-2023
• Completion Date: 14-Apr-2025
• Ref Project: SIST EN 320:2011 - Particleboards and fibreboards - Determination of resistance to axial withdrawal of screws

Relations

• Replaces: EN 320:1993 - Fibreboards - Determination of resistance to axial withdrawal of screws
• Effective Date: 23-Apr-2011

Overview

EN 320:2011 is a European Standard developed by the European Committee for Standardization (CEN) that specifies a uniform method for determining the resistance of particleboards and fibreboards to the axial withdrawal of screws. This standard provides a reliable test procedure to measure how well screws hold when inserted into these engineered wood products, which is critical for manufacturers, testers, and users to ensure product performance and durability.

Updated from its previous 1993 edition, EN 320:2011 extends its scope to include particleboards along with fibreboards and aligns with current normative references. It sets clear guidelines on sample preparation, test conditions, and measurement of forces, making it a key reference for quality control and product specification in wood-based panel industries.

Key Topics

• Scope and Purpose
  EN 320:2011 defines the standardized procedure for measuring the axial withdrawal resistance of screws in particleboards and fibreboards. It covers tests for both surface and edge withdrawal resistance, critical for understanding how screws will perform in real applications.

• Test Specimens and Preparation
  Samples are cut into square specimens (75 mm ± 1 mm sides) and conditioned at 65% ± 5% relative humidity and 20°C ± 2°C until mass constancy is achieved. Screw insertion holes are pre-drilled with specific diameters and depths to ensure consistent testing conditions.

• Test Screw Specification
  The standard mandates the use of a steel screw with nominal size 4.2 mm × 38 mm, threaded according to EN ISO 1478, embedded so that 15 mm ± 0.5 mm of the threaded length is within the specimen.

• Testing Procedure
  A testing machine applies an axial withdrawal force perpendicular to the panel surface at a constant rate of 10 mm/min until the screw is pulled out. Maximum force is recorded, with results stated in Newtons (N) or Newtons per millimeter (N/mm) depending on specimen thickness.

• Measurement and Reporting
  Results differentiate between surface and edge screw withdrawal resistance (the latter only for panels ≥ 15 mm thick). The data are averaged over multiple specimens to provide trustworthy values per panel. A detailed test report format is mandated under EN 326-1.

Applications

• Product Quality Control
  Manufacturers of particleboards and fibreboards use EN 320:2011 to verify the mechanical fastening properties of their products, ensuring screws will not prematurely loosen or withdraw under expected loads.

• Construction and Furniture Industry
  This test method helps construction professionals, cabinet makers, and furniture designers select appropriate board materials for screw retention, influencing joint strength, longevity, and safety of end products.

• Standard Compliance and Certification
  Compliance with EN 320:2011 supports product certification efforts and aligns with European market requirements, fostering trust in product durability and safety.

Related Standards

• EN 326-1 – Provides detailed guidelines for sampling, cutting test specimens, and reporting results for wood-based panels, essential for EN 320 specimen preparation.

• EN ISO 1478 – Specifies the requirements for sheet metal screw threads used during testing to ensure screw consistency and test repeatability.

• EN 309 – Defines and classifies particleboards, complementing EN 320’s scope on these materials.

• EN 316 – Defines and classifies fibreboards, providing material context linked with EN 320 requirements.

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Keywords: EN 320:2011, axial withdrawal resistance, screw pull-out test, particleboards, fibreboards, screw retention strength, wood-based panels, European Standard CEN, furniture industry standards, construction materials testing, screw withdrawal force measurement.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2011
9ODNQHQHSORãþH'RORþDQMHRGSRUQRVWLSURWLDNVLDOQHPXL]YOHNXYLMDND
Particleboards and fibreboards - Determination of resistance to axial withdrawal of
screws
Spanplatten und Faserplatten - Bestimmung des achsenparallelen
Schraubenausziehwiderstands
Panneaux de particules et panneaux de fibres - Détermination de la résistance à
l'arrachement des vis selon son axe
Ta slovenski standard je istoveten z: EN 320:2011
ICS:
79.060.20 9ODNQHQHLQLYHUQHSORãþH Fibre and particle boards
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 320
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2011
ICS 79.060.20 Supersedes EN 320:1993
English Version
Particleboards and fibreboards - Determination of resistance to
axial withdrawal of screws
Panneaux de particules et panneaux de fibres - Spanplatten und Faserplatten - Bestimmung des
Détermination de la résistance à l'arrachement des vis achsenparallelen Schraubenausziehwiderstands
selon leur axe
This European Standard was approved by CEN on 17 March 2011.

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 and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 320:2011: E
worldwide for CEN national Members.

Contents Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Principles .4
4 Apparatus .4
5 Test pieces .5
5.1 Sampling .5
5.2 Dimensions .5
5.3 Conditioning .5
5.4 Preparation of test pieces .5
6 Procedure .6
6.1 Positioning of test pieces .6
6.2 Application of the force .7
6.3 Measurement of maximum load .7
7 Expression of results .8
7.1 For a test piece .8
7.2 For a board .8
8 Test report .8
Bibliography .9

Foreword
This document (EN 320:2011) has been prepared by Technical Committee CEN/TC 112 “Wood-based
panels”, the secretariat of which is held by DIN.
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 2011, and conflicting national standards shall be withdrawn at
the latest by October 2011.
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 320:1993.
Compared to EN 320:1993, the following modifications have been made:
a) Scope extended to include also particleboards;
b) Normative re
...

SLOVENSKI STANDARD
01-oktober-2011
Vlaknene plošče - Določanje odpornosti proti aksialnemu izvleku vijaka
Particleboards and fibreboards - Determination of resistance to axial withdrawal of
screws
Spanplatten und Faserplatten - Bestimmung des achsenparallelen
Schraubenausziehwiderstands
Panneaux de particules et panneaux de fibres - Détermination de la résistance à
l'arrachement des vis selon son axe
Ta slovenski standard je istoveten z: EN 320:2011
ICS:
79.060.20 Vlaknene in iverne plošče Fibre and particle boards
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPÄISCHE NORM
EN 320
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2011
ICS 79.060.20 Ersatz für EN 320:1993
Deutsche Fassung
Spanplatten und Faserplatten - Bestimmung des
achsenparallelen Schraubenausziehwiderstands
Particleboards and fibreboards - Determination of Panneaux de particules et panneaux de fibres -
resistance to axial withdrawal of screws Détermination de la résistance à l'arrachement des vis
selon leur axe
Diese Europäische Norm wurde vom CEN am 17.März 2011 angenommen.

Die CEN-Mitglieder sind gehalten, die CEN/CENELEC-Geschäftsordnung zu erfüllen, in der die Bedingungen festgelegt sind, unter denen
dieser Europäischen Norm ohne jede Änderung der Status einer nationalen Norm zu geben ist. Auf dem letzten Stand befindliche Listen
dieser nationalen Normen mit ihren bibliographischen Angaben sind beim Management-Zentrum des CEN-CENELEC oder bei jedem CEN-
Mitglied auf Anfrage erhältlich.

Diese Europäische Norm besteht in drei offiziellen Fassungen (Deutsch, Englisch, Französisch). Eine Fassung in einer anderen Sprache,
die von einem CEN-Mitglied in eigener Verantwortung durch Übersetzung in seine Landessprache gemacht und dem Management-
Zentrum mitgeteilt worden ist, hat den gleichen Status wie die offiziellen Fassungen.

CEN-Mitglieder sind die nationalen Normungsinstitute von Belgien, Bulgarien, Dänemark, Deutschland, Estland, Finnland, Frankreich,
Griechenland, Irland, Island, Italien, Kroatien, Lettland, Litauen, Luxemburg, Malta, den Niederlanden, Norwegen, Österreich, Polen,
Portugal, Rumänien, Schweden, der Schweiz, der Slowakei, Slowenien, Spanien, der Tschechischen Republik, Ungarn, dem Vereinigten
Königreich und Zypern.
EUROPÄISCHES KOMITEE FÜR NORMUNG
EUROPEAN COMMITTEE FOR STANDARDIZATION

COMITÉ EUROPÉEN DE NORMALISATION

Management-Zentrum: Avenue Marnix 17, B-1000 Brüssel
© 2011 CEN Alle Rechte der Verwertung, gleich in welcher Form und in welchem Ref. Nr. EN 320:2011 D
Verfahren, sind weltweit den nationalen Mitgliedern von CEN vorbehalten.

Inhalt Seite
Vorwort .3
1 Anwendungsbereich .4
2 Normative Verweisungen.4
3 Kurzbeschreibung.4
4 Prüfeinrichtungen.4
4.1 Prüfmaschine.4
4.2 Metallrahmen.4
5 Prüfkörper.5
5.1 Probenahme.5
5.2 Maße.5
5.3 Klimatisierung.5
5.4 Vorbereitung der Prüfkörper .5
6 Durchführung der Prüfung .6
6.1 Positionierung des Prüfkörpers.6
6.2 Aufbringung der Kraft .7
6.3 Messung der Höchstkraft.7
7 Angabe der Ergebnisse.8
7.1 Prüfkörper.8
7.2 Platten.8
8 Prüfbericht.8
Literaturhinweise .9

Vorwort
Dieses Dokument (EN 320:2011) wurde vom Technischen Komitee CEN/TC 112 „Holzwerkstoffe“ erarbeitet,
dessen Sekretariat vom DIN gehalten wird.
Diese Europäische Norm muss den Status einer nationalen Norm erhalten, entweder durch Veröffentlichung
eines identischen Textes oder durch Anerkennung bis Oktober 2011, und etwaige entgegenstehende
nationale Normen müssen bis Oktober 2011 zurückgezogen werden.
Es wird auf die Möglichkeit hingewiesen, dass einige Texte dieses Dokuments Patentrechte berühren können.
CEN [und/oder CENELEC] sind nicht dafür verantwortlich, einige oder alle diesbezüglichen Patentrechte zu
identifizieren.
Dieses Dokument ersetzt EN 320:1993.
Gegenüber EN 320:1993 wurden folgende Änderungen vorgenommen:
a) Anwendungsbereich um Sp
...