EN 1022:2005
(Main)Domestic furniture - Seating - Determination of stability
Domestic furniture - Seating - Determination of stability
This European Standard specifies test methods and requirements for the determination of the stability of all types of domestic seating for adults.
The European Standard does not apply to adjustable geometry seating where the backrest is at an angle of 10º or less to the horizontal.
Stability can be determined by either the experimental or the calculative method. Both methods are based on the same forces and points of application.
The calculative method does not apply to seating, which have variable geometry and to seating, which visibly flex under the applied loads.
If the result of the calculative method is uncertain or marginal the result shall be checked, if possible, by the experimental method.
Wohnmöbel - Sitzmöbel - Bestimmung der Standsicherheit
Diese Europäische Norm legt Anforderungen und Prüfverfahren zur Bestimmung der Standsicherheit für alle
Arten von Sitzmöbeln für Erwachsene im Wohnbereich fest.
Die Europäische Norm gilt nicht für Sitzmöbel mit veränderbarer Geometrie, bei denen die Rückenlehne einen
Winkel von 10° oder weniger zur Waagerechten aufweist.
Die Standsicherheit kann entweder durch das experimentelle Verfahren oder das rechnerische Verfahren be-stimmt
werden. Bei beiden Verfahren werden die gleichen Kräfte und die gleichen Lastangriffspunkte zu-grunde
gelegt.
Das rechnerische Verfahren gilt nicht für Sitzmöbel mit veränderbarer Geometrie und für Sitzmöbel, die unter
den aufgebrachten Kräften sichtbar nachgeben.
Wenn das Ergebnis des rechnerischen Verfahrens zweifelhaft oder sehr knapp ist, muss das Ergebnis, wenn
möglich, durch das experimentelle Verfahren überprüft werden.
Mobilier domestique - Sièges - Détermination de la stabilité
La présente Norme européenne spécifie des méthodes d�essai et des exigences pour la détermination de la
stabilité de tous les types de sièges à usage domestique destinés à être utilisés par des adultes.
Cette norme ne s�applique pas aux sièges à géométrie variable dont le dossier fait un angle de 10° ou moins
par rapport à l�horizontale.
La stabilité des sièges peut être déterminée soit par la méthode par expérimentation, soit par la méthode par
le calcul. Ces méthodes sont compatibles dans la mesure où elles appliquent les mêmes forces aux mêmes
endroits.
La méthode par le calcul ne s�applique ni aux sièges à géométrie variable ni à ceux qui se déforment de façon
visible sous les charges appliquées.
Si le résultat de la méthode par le calcul est incertain ou limite, il doit être vérifié, si possible, par la méthode
par expérimentation.
Pohištvo za domačo uporabo - Sedežno pohištvo - Ugotavljanje stabilnosti
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2006
1DGRPHãþD
SIST EN 1022:1997
SIST EN 1022:1997/AC:2001
3RKLãWYR]DGRPDþRXSRUDER6HGHåQRSRKLãWYR8JRWDYOMDQMHVWDELOQRVWL
Domestic furniture - Seating - Determination of stability
Wohnmöbel - Sitzmöbel - Bestimmung der Standsicherheit
Mobilier domestique - Sieges - Détermination de la stabilité
Ta slovenski standard je istoveten z: EN 1022:2005
ICS:
97.140 Pohištvo Furniture
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 1022
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2005
ICS 97.140 Supersedes EN 1022:1996
English version
Domestic furniture - Seating - Determination of stability
Mobilier domestique - Sièges - Détermination de la stabilité Wohnmöbel - Sitzmöbel - Bestimmung der Standsicherheit
This European Standard was approved by CEN on 26 May 2005.
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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1022:2005: E
worldwide for CEN national Members.
Contents
Page
Foreword.4
1 Scope .5
2 Terms and definitions .5
3 General test conditions.5
4 Test equipment .6
5 Determination of seat and back loading points.7
6 Test procedure and requirements, all seating: experimental method .10
7 Test procedures and requirements for seating with variable geometry: experimental
method .13
8 Calculative method.20
9 Test report .21
Foreword
This European Standard (EN 1022:2005) has been prepared by Technical Committee CEN/TC 207 “Furniture”,
the secretariat of which is held by UNI.
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 December 2005, and conflicting national standards shall be withdrawn
at the latest by December 2005.
This document supersedes EN 1022:1996.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and United Kingdom.
1 Scope
This European Standard specifies test methods and requirements for the determination of the stability of all
types of domestic seating for adults.
The European Standard does not apply to adjustable geometry seating where the backrest is at an angle of
10º or less to the horizontal.
Stability can be determined by either the experimental or the calculative method. Both methods are based on
the same forces and points of application.
The calculative method does not apply to seating, which have variable geometry and to seating, which visibly
flex under the applied loads.
If the result of the calculative method is uncertain or marginal the result shall be checked, if possible, by the
experimental method.
2 Terms and definitions
For the purposes of this European Standard, the following terms and definitions apply:
2.1
stability
ability to withstand forces that tend to cause the loaded seating to overturn
2.2
load bearing structure
any part of a chair, which as its primary function supports a portion of the loads exerted by the sitter, e.g. the
seat frame but not the upholstery
2.3
footrest
part of the structure of a chair intended to support the feet of the sitter
3 General test conditions
3.1 General
No prior conditioning is required.
The furniture shall be tested as delivered. The tests shall be carried out in the configuration most likely to
cause overturning.
Knock-down furniture shall be assembled according to the instructions supplied with it. If the furniture can be
assembled or combined in different ways, the most adverse configuration shall be used for each test. Knock-
down fittings shall be tightened before testing.
Stools shall be tested for forwards overturning in all directions. The other stability tests are not applicable.
The test results are only valid for the tested seating. When the test results are intended to be applied to
production models, the tested seating shall be representative of the production model.
In the case of designs not catered for in the test procedures, the tests shall be carried out as far as possible
as described and deviations from the test procedure recorded in the test report.
3.2 Tolerances
Unless otherwise stated:
all forces shall have an accuracy of ± 5 % of the nominal force.
all masses an accuracy of ± 0,5 % of the nominal mass.
all dimensions an accuracy of ± 1 mm of the nominal dimension.
all angles an accuracy of ± 2° the nominal angle.
The tolerance for positioning of loading pads shall be ± 5 mm.
The tests are described in terms of the application of forces. Masses can however be used. The relationship
10 N = 1 kg may be used for this purpose.
4 Test equipment
4.1 General
Except otherwise specified, the tests may be applied by any suitable device, because results are dependent
on correctly applied loads and not upon the apparatus.
The test equipment shall not hinder any deformation of the seating being tested.
All loading pads shall be capable of pivoting in relation to the direction of the applied force and the pivot point
shall be as close as practically possible to the load surface.
4.2 Loading pad
Rigid circular object 200 mm in diameter with a face having a convex spherical curvature of 300 mm radius
with a 12 mm edge radius. The loading pad shall be mounted on a device, which can apply a vertical force as
specified.
4.3 Horizontal force application device
A device, which can apply a force either at a given value or at a gradually increasing value, e.g. a spring
balance.
4.4 Loading discs
Discs with a mass of 10 kg each, diameter 350 mm and a thickness of 48 mm.
4.5 Support apparatus
An apparatus to support the main stack of the loading discs in reclining chair tests. It shall be as light as
possible and not heavier than 2,5 kg. Figure 1 shows a basic design.
Dimensions in millimetres
Figure 1 — Support apparatus
4.6 Loading point template
A template, which consists of two shaped members fastened together by a pivot at one end (Figures 2 and 3).
The contours of the shaped surfaces are so devised as to sink into the upholstery. For this purpose the seat
loading arm shall have a mass of 20 kg applied at the seat loading point.
The apparatus is marked as shown in Figure 3.
4.7 Stops
Stops shall be of the minimum height required to prevent sliding and shall not inhibit overturning.
4.8 Floor surface
Horizontal, flat, rigid and with a smooth surface.
5 Determination of seat and back loading points
The seat and back loading points shall be determined using the loading point template (4.6) as specified
below. In some cases it may not be possible to determine the loading points by means of the loading point
template. In such cases, the loading points of 175 mm forward of the seat/back junction and 300 mm upward
from the seat/back junction shall be used.
Position the loading point template (4.6) on the fore and aft centreline as far towards the rear as possible with
its load applied at the seat loading point.
Scale: 1 square = 20 mm
Key
1 Rear
2 Front
3 Top
4 Bottom
5 Seat loading point
6 Back loading point
7 Pivot point
A Seat portion
B Back portion
Figure 2 — Loading surface curves for seat and back loading point template
Dimensions in millimetres
Key
1 Typical section
2 Straight edge for determination of seat or back inclination
3 Mark to fix 90°
A Seat loading point (chairs)
B Back loading point (chairs)
Figure 3 — Loading point template
Adjust its position by pushing the back portion into the back, so levering the seat portion forwards until the
shape of the loading point template correlates with that of the seat. In cases where the loading point template
can be settled in more than one position, the position having the smallest angle between the seat and back
portions of the loading point template shall be used.
The angle shall in no cases be less than 90°.
Mark the loading points from the loading point template.
When a seating has more than one sitting place, repeat the procedures on the other sitting places. If the
number of sitting places in the seating is not obvious, divide the total seat length (in millimetres) by 600 and
round to the nearest whole number to determine the number of places. Divide the total seat length into that
number of places of equal length.
6 Test procedure and requirements, all seating: experimental method
6.1 Requirements
When tested according to Clause 6, the seating shall not overturn.
6.2 Forwards overbalancing, all seating
Position the seating on the floor surface (4.8) with the front legs or base restrained by stops (4.7).
Apply a force of 600 N vertically (for multiple sitting places to a maximum of 2 places) by means of the loading
pad (4.2) acting at those points 60 mm behind the front edge of the load bearing structure most likely to result
in overturning.
At each loaded position apply a force F of 20 N for at least 5 s horizontally outwards along a horizontal line
extended forward from the point where the base of the loading pad meets the upper surface of the seat
(Figure 4).
For calculative method see Clause 8.
6.3 Forwards overturning for seating with footrest
For seating with footrests repeat the procedure in 6.2 applying the vertical and horizontal loads to the footrests.
For footrests of tubular construction the loads shall be applied along the centre line of the tube.
6.4 Sideways overbalancing, all seating without arms
Position the seating on the floor surface (4.8) with the side legs or base restrained by stops (4.7).
Apply a force of 600 N vertically by means of the loading pad at those points 60 mm behind the edge of the
load bearing structure of the side nearest the stopped feet most likely to result in overturning.
Apply a sideways force F of 20 N horizontally outwards for at least 5 s along a line from the point where the
base of the loading pad meets the upper surface of the seat (Figure 5).
For calculative method see Clause 8.
6.5 Sideways overbalancing, all seating with arms
Position the seating on the floor surface (4.8) with the side legs or base restrained by stops (4.7).
Apply a vertical force F of 350 N by means of the loading pad (4.2) at a position on the centre line of the arm
up to a maximum 40 mm inwards from the outer edge of the arm structure at the most adverse position along
its length.
Apply a vertical force of 250 N at a point 100 mm to the side of the fore and aft centre line of the seat (Figure
6) which is nearest the stopped feet and at the same distance from the backrest as the arm loads.
Apply a horizontal force F of 20 N outwards, and perpendicular to the line joining the stopped feet, for at least
5 s, at the upper surface of the armrest in line with the vertical arm force and on the side with stopped feet
(Figure 6).
For calculative method see Clause 8.
6.6 Rearwards overbalancing, all seating with backs
This sub-clause only applies to seating with backs extending 50 mm or more above the unloaded seat.
Position the seating on the floor surface (4.8) with the rear legs or base restrained by stops (4.7).
All adjustable backs sha
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.