oSIST prEN 15338:2023
(Main)Hardware for furniture - Strength and durability of extension elements and their components
Hardware for furniture - Strength and durability of extension elements and their components
This European Standard specifies test methods and requirements for the strength and durability of all types of extension elements and their components for all fields of application, except table extensions.
The tests consist of the application of loads, forces and velocities simulating normal functional use, as well as misuse, that might reasonably be expected to occur.
With the exception of the corrosion test in 6.4, the tests are designed to evaluate properties without regard to materials, design/construction or manufacturing processes.
The strength and durability tests only relate to the extension elements and the parts used for the attachment, e.g. screws.
The strength and durability tests are carried out in a test frame with specified properties. The test results can only be used as a guide to the performance of a piece of furniture.
The test results are only valid for the extension element tested. These results may be used to represent the performance of production models provided that the tested model is representative of the production model.
Ageing and influences of heat and humidity are not included.
Möbelbeschläge - Festigkeit und Dauerhaltbarkeit von Auszügen und deren Komponenten
Dieses Dokument legt Prüfverfahren und Anforderungen für die Festigkeit und Dauerhaltbarkeit aller Arten von Auszügen und deren Komponenten für alle Anwendungsbereiche fest, mit Ausnahme von Tischauszügen.
Bei den Prüfungen werden Lasten, Kräfte und Geschwindigkeiten aufgebracht, die einer normalen funktions¬bedingten Benutzung sowie auch einer vorhersehbaren Fehlanwendung entsprechen.
Mit Ausnahme der Korrosionsprüfung nach 6.4 sind die Prüfungen auf die Bewertung von Eigenschaften ausgerichtet, ohne Berücksichtigung von Werkstoffen, Gestaltung/Konstruktion oder Herstellverfahren.
Die Prüfungen der Festigkeit und Dauerhaltbarkeit beziehen sich nur auf die Auszüge und die Teile für die Befestigung, z. B. Schrauben.
Die Prüfungen der Festigkeit und Dauerhaltbarkeit werden in einem Prüfrahmen mit festgelegten Eigenschaften durchgeführt. Die Prüfergebnisse können nur als Hinweis für die Gebrauchstauglichkeit eines Möbelstückes herangezogen werden.
Die Prüfergebnisse sind nur für den geprüften Auszug gültig. Diese Ergebnisse dürfen zur Darstellung der Gebrauchstauglichkeit von Produktionsserien herangezogen werden, vorausgesetzt, das geprüfte Modell ist für die Serie repräsentativ.
Alterung und die Einwirkungen von Wärme und Feuchte sind nicht enthalten.
Quincaillerie d'ameublement - Résistance mécanique et endurance des éléments extractibles et de leurs composants
Le présent document spécifie des méthodes d’essai et des exigences relatives à la résistance mécanique et à l’endurance de tous les types d’éléments extractibles et de leurs composants prévus pour tous les champs d’application, à l’exception des rallonges de table.
Les essais consistent à appliquer des charges, forces et vitesses simulant un usage fonctionnel normal et un mauvais usage auquel on peut raisonnablement s’attendre.
À l’exception de l’essai de corrosion décrit en 6.4, les essais sont conçus pour évaluer les propriétés quels que soient les matériaux, la conception/construction et les procédés de fabrication.
Les essais de résistance mécanique et d’endurance concernent uniquement les éléments extractibles et les parties utilisées pour leur fixation, par exemple des vis.
Les essais de résistance mécanique et d’endurance sont effectués dans une structure d’essai ayant des propriétés spécifiées. Les résultats d’essai peuvent uniquement servir de guide en matière de performances d’un meuble.
Les résultats d’essai ne sont valables que pour les éléments extractibles soumis à essai. Ces résultats peuvent être utilisés pour indiquer les performances des modèles fabriqués à condition que le modèle soumis à essai soit représentatif du modèle fabriqué.
Le vieillissement et les effets de la chaleur et de l’humidité ne sont pas traités.
Pohištveno okovje - Trdnost in trajnost izvlečnih elementov in njihovih sestavnih delov
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 15338:2023
01-junij-2023
Pohištveno okovje - Trdnost in trajnost izvlečnih elementov in njihovih sestavnih
delov
Hardware for furniture - Strength and durability of extension elements and their
components
Möbelbeschläge - Festigkeit und Dauerhaltbarkeit von Auszügen und deren
Komponenten
Quincaillerie d'ameublement - Résistance mécanique et endurance des éléments
extractibles et de leurs composants
Ta slovenski standard je istoveten z: prEN 15338
ICS:
97.140 Pohištvo Furniture
oSIST prEN 15338:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 15338:2023
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oSIST prEN 15338:2023
DRAFT
EUROPEAN STANDARD
prEN 15338
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2023
ICS 97.140 Will supersede EN 15338:2007+A1:2010
English Version
Hardware for furniture - Strength and durability of
extension elements and their components
Quincaillerie d'ameublement - Résistance mécanique et Möbelbeschläge - Festigkeit und Dauerhaltbarkeit von
endurance des éléments extractibles et de leurs Auszügen und deren Komponenten
composants
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 207.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15338:2023 E
worldwide for CEN national Members.
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oSIST prEN 15338:2023
prEN 15538:2023 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General test conditions . 7
4.1 Preliminary preparation . 7
4.2 Test equipment . 7
4.3 Application of forces . 8
4.4 Tolerances . 8
4.5 Sequence of testing . 8
4.6 Inspection and assessment of results . 8
5 Test apparatus. 8
5.1 Loading pad . 8
5.2 Apparatus for slam-shut/open tests . 8
5.3 Masses . 9
5.4 Glass marbles . 9
5.5 Loads for filing pockets . 9
5.6 Test frame and test drawer . 9
5.7 Particle board properties . 10
5.8 Wood component . 11
6 Test procedures and requirements . 11
6.1 General . 11
6.2 Overload tests . 11
6.2.1 General . 11
6.2.2 Vertical downwards static overload . 11
6.2.3 Horizontal sideways static overload . 11
6.2.4 Outwards static overload . 12
6.2.5 Slam-shut/open . 12
6.3 Functional tests . 13
6.3.1 General . 13
6.3.2 Deflection of extension element bottoms . 13
6.3.3 Deformation of front and back . 13
6.3.4 Operating forces . 14
6.3.5 First vertical downwards static load test . 14
6.3.6 First horizontal sideways static load . 15
6.3.7 Determination of reference point for the deflection of front . 15
6.3.8 Durability . 15
6.3.9 Deflection of front . 16
6.3.10 Second vertical downwards static load . 16
6.3.11 Second horizontal sideways static load . 16
6.3.12 Operating forces . 17
6.3.13 Slam-shut/open . 17
6.4 Corrosion resistance . 17
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6.5 Test report . 17
Annex A (normative) Product information system . 18
Annex B (normative) Apparatus for slam-shut/open of extension elements . 19
Annex C (normative) Test parameters . 23
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prEN 15538:2023 (E)
European foreword
This document (prEN 15338:2023) has been prepared by Technical Committee CEN/TC 207 “Furniture”,
the secretariat of which is held by UNI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 15338:2007+A1:2010.
The main changes compared to the previous edition are listed below:
— updating of normative references;
— revision of 6.4 “Corrosion resistance”;
— deletion of A.6 “Corrosion test”;
— editorial revision of the entire document.
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Introduction
The aim of this document is to provide furniture manufacturers, designers and developers with
comparable information regarding the performance of extension elements and drawers.
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1 Scope
This document specifies test methods and requirements for the strength and durability of all types of
extension elements and their components for all fields of application, except table extensions.
The tests consist of the application of loads, forces and velocities simulating normal functional use, as
well as misuse, that can reasonably be expected to occur.
With the exception of the corrosion test in 6.4, the tests are designed to evaluate properties without
regard to materials, design/construction or manufacturing processes.
The strength and durability tests only relate to the extension elements and the parts used for the
attachment, e.g. screws.
The strength and durability tests are carried out in a test frame with specified properties. The test results
can only be used as a guide to the performance of a piece of furniture.
The test results are only valid for the extension element tested. These results may be used to represent
the performance of production models provided that the tested model is representative of the production
model.
Ageing and influences of heat and humidity are not included.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 320, Particleboards and fibreboards - Determination of resistance to axial withdrawal of screws
EN 323, Wood-based panels - Determination of density
EN 17737, Hardware for furniture - Test and evaluation methods for the corrosion resistance of furniture
fittings
EN ISO 6270-2, Paints and varnishes - Determination of resistance to humidity - Part 2: Condensation (in-
cabinet exposure with heated water reservoir) (ISO 6270-2)
EN ISO 10289, Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates
- Rating of test specimens and manufactured articles subjected to corrosion tests (ISO 10289)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
catch device
device which keeps or pulls an extension element in place, but does not require a second action in order
to release it
EXAMPLES A magnetic catch or a self-closing or self-opening mechanism.
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3.2
extension element
components that can be pulled out and pushed in
EXAMPLES Drawers, suspended pocket files, keyboard trays.
3.3
loading capacity
M
mass in kg, as specified by the manufacturer, for which the extension element will fulfil the strength and
durability requirements
Note 1 to entry: The loading capacity includes the extension element and the load in/on the extension element.
In other EN standards, this is referred to as total mass.
3.4
damper
mechanism which gently brings the extension element to a stop
4 General test conditions
4.1 Preliminary preparation
The extension element shall be assembled/mounted according to the instructions supplied with it.
If mounting or assembly instructions are not supplied, the most adverse configuration shall be used and
the mounting or assembly method shall be recorded in the test report. Fittings shall be tightened before
testing and shall not be re-tightened unless specifically required in the manufacturer’s instructions. If the
configuration needs to be changed to produce the worst-case conditions, this shall be recorded in the test
report.
For testing a range of related extension elements, only worst case(s) need to be tested.
The tests shall be carried out in indoor ambient conditions at a temperature between 15 °C and 25 °C. If
during a test the temperature is outside of the range of 15 °C to 25 °C, the maximum and/or minimum
temperature shall be recorded in the test report.
Extension elements which include structural hardware parts made of hygroscopic plastic materials, e.g.
polyamide shall be conditioned at (23 ± 5) °C and a relative humidity of (50 ± 5) % for at least 7 days
before testing.
In the case of designs not addressed in the test procedures, the test shall be carried out as far as possible
as described, and deviations from the test procedure recorded in the test report.
Before beginning the testing, visually inspect the extension element thoroughly. Record any defects so
that they are not assumed to have been caused by the tests. Carry out measurements when specified.
4.2 Test equipment
Unless otherwise specified, the tests may be applied by any suitable device, because results are not
dependent upon the apparatus.
The equipment shall not inhibit deformation of the extension element, i.e. it shall be able to move so that
it can follow the deformation of the extension element during testing.
All loading pads shall be capable of pivoting in relation to the direction of the applied force. The pivot
point shall be as close as practically possible to the load surface.
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4.3 Application of forces
The forces in the static load tests shall be applied sufficiently slowly to ensure that negligible dynamic
force is applied. Unless otherwise specified, each force shall be maintained for not less than 10 s and not
more than 15 s.
The forces in durability tests shall be applied at a rate to ensure that excessive heating does not occur.
The forces may be replaced by masses. The relation 10 N = 1 kg may be used for this purpose.
4.4 Tolerances
Unless otherwise stated, the following tolerances are applicable:
Forces: ± 5 % of the nominal force;
Velocities: ± 5 % of the nominal velocity;
Masses: ± 1 % of the nominal mass;
Dimensions: ± 1 mm of the nominal dimension;
Angles: ± 2° of the nominal angle;
The accuracy for the positioning of loading pads shall be ± 5 mm.
4.5 Sequence of testing
The tests shall be carried out in the same sequence as the clauses are numbered in this document. If the
clause sequence is not followed, the sequence shall be recorded in the test report.
4.6 Inspection and assessment of results
Before and after completion of each test, carry out the inspection as specified, after using adjustment
devices, if available.
Before any measurements are taken, the loaded extension shall be moved 10 times over the total
extension length.
Record any changes that have taken place since the initial inspection. The inspection shall include at least
the following:
a) the fracture of any component or joint;
b) the loosening of any joint intended to be rigid, which can be demonstrated by hand pressure;
c) the deformation or wear of any part or component such that its functioning is impaired;
d) the loosening of any means of fixing components;
e) any impaired function of a component or part.
5 Test apparatus
5.1 Loading pad
Rigid disc 100 mm in diameter (or 50 mm to be used in limited space), with a flat face and a 12 mm front
edge blend radius.
5.2 Apparatus for slam-shut/open tests
Two examples for suitable apparatus as well as calibration instructions are given in Annex B.
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5.3 Masses
Masses shall be designed so that they do not reinforce the structure or re-distribute the stresses.
5.4 Glass marbles
Marbles made of solid glass with 10 mm to 15 mm diameter. They shall be in a flexible bag large enough
to allow them to move in the bag during the test.
In cases where the volume of the glass marbles is greater than the volume of the extension element, steel
marbles shall be used. This shall be noted in the test report.
5.5 Loads for filing pockets
Suspended filing pockets shall be loaded with typing paper or an equivalent alternative as shown in
Figure 1.
In cases where it is not possible to achieve the loading capacity with paper, the additional mass shall be
steel and shall be positioned as the spacing material. This shall be noted in the test report.
Key
1 typing paper
2 spacing material (for example polystyrene) in the middle of the extension element
3 front of extension element
4 air gap (will be determined by the size of the paper)
5 air gap (25 ± 6) mm
A side view
B top view
Figure 1 — Loading of suspended filing pockets with typing paper
5.6 Test frame and test drawer
The tests specified in 6.2 and 6.3 shall be carried out in a test frame (Figure 2, which is so constructed
that the deformation under the applied load is no more than 1 mm).
Unless otherwise specified by the manufacturer, the extensions shall be mounted on particle board sides,
see
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