1、BS EN1335-3:2009ICS 13.180; 97.140NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDOffice furniture Office work chairPart 3: Test methodsIncorporatingcorrigendumNovember 2009National forewordThis British Standard is the UK implementation of EN 1335-3:2009, incorp
2、orating corrigendum November 2009. It supersedes BS EN 1335-3:2000 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee FW/0/3, Office.A list of organizations represented on this committee can be obtained on request to its secretary. This publication does n
3、ot purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. BS EN 1335-3:2009This British Standard was published under the authority of the Standards Policy and
4、Strategy Committee on 30 April 2009 BSI 2011Amendments/corrigenda issued since publicationDate Comments 30 April 2011 Implementaion of CEN corigendum November 209: replacement of Figure 1ISBN 978 0 580 69798 2EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 1335-3April 2009ICS 97.140 Supersedes EN
5、1335-3:2000 English VersionOffice furniture - Office work chair - Part 3: Test methodsMobilier de bureau - Siges de travail de bureau - Partie 3:Mthodes dessaiBrombel - Bro-Arbeitsstuhl - Teil 3: PrfverfahrenThis European Standard was approved by CEN on 28 February 2009.CEN members are bound to comp
6、ly with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Managemen
7、t 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theoffi
8、cial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slove
9、nia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN nationa
10、l Members.Ref. No. EN 1335-3:2009: EIncorporating corrigendum November 2009BS EN 1335-3:2009EN 1335-3:2009 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 General test conditions .5 4.1 Preliminary preparation 5 4.2 Test equipment 5 4.3 Application of f
11、orces .5 4.4 Tolerances 6 4.5 Sequence of testing .6 4.6 Inspection and assessment of results 6 5 Test apparatus .8 5.1 Test surface 8 5.2 Stops .8 5.3 Seat loading pad 8 5.4 Smaller seat loading pad 8 5.5 Local loading pad 9 5.6 Back loading pad .9 5.7 Arm rest durability test apparatus 10 5.8 Stra
12、p . 10 5.9 Stability loading device 10 5.10 Loading discs 11 5.11 Test surface for castor durability (and rolling resistance of the unloaded chair) . 11 6 Loading points 11 6.1 Loading point “A“ . 11 6.2 Loading point “B“ . 11 6.3 Loading point “C“ . 11 6.4 Loading point “D“ . 11 6.5 Loading point “
13、E“ . 12 6.6 Loading point “F“ 12 6.7 Loading point “G“ . 12 6.8 Loading point “H“ . 12 6.9 Loading point “J“ 12 7 Tests methods . 13 7.1 Stability 13 7.2 Static load tests 17 7.3 Durability tests 19 7.4 Rolling resistance of the unloaded chair . 21 8 Test report . 21 Annex A (normative) Seat loading
14、 pad data 23 Annex B (normative) Stability loading device data 25 Annex C (informative) Loads, masses and cycles for functional tests 27 BS EN 1335-3:2009EN 1335-3:2009 (E) 3 Foreword This document (EN 1335-3:2009) has been prepared by Technical Committee CEN/TC 207 “Furnitures”, the secretariat of
15、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 October 2009, and conflicting national standards shall be withdrawn at the latest by October 2009. Attention is drawn to the p
16、ossibility 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 1335-3:2000. This series consist of following parts: EN 1335-1, Office furniture Offi
17、ce work chair Part 1: Dimensions Determination of dimensions; EN 1335-2, Office furniture Office work chair Part 2: Safety requirements; EN 1335-3, Office furniture Office work chair Part 3: Test methods. The main changes with respect to the previous edition are listed below: a) ISO 21015:2007 has b
18、een adopted as far as possible; b) loads and cycles for the safety tests have been moved to EN 1335-2; c) Annex C includes loads and cycles for functional tests; d) seat and back durability test procedures have been significantly changed; e) determination of the maximum offset of the backrest has be
19、en deleted. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Irel
20、and, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 1335-3:2009EN 1335-3:2009 (E) 4 1 Scope This European Standard specifies mechanical test methods for determining the stabilit
21、y, strength and durability of office work chairs. This European Standard does not specify type approval tests for chair components. The tests are designed to be applied to an article of furniture that is fully assembled and ready for use. The tests consist of the application, to various parts of the
22、 item, of forces simulating normal functional use, as well as misuse that might reasonably be expected to occur. The tests are designed to evaluate properties without regard to materials, design/construction or manufacturing processes. The test results are only valid for the article tested. When the
23、 test results are intended to be applied to other similar articles, it is important that the test specimen be representative of the production model. Tests carried out according to this standard are intended to demonstrate the ability of the item to give satisfactory service in its intended environm
24、ent. The safety requirements are specified in EN 1335-2 and additional loads, masses and cycles for functional tests can be found in Annex C (informative). The tests have been developed for units/components that have not been in use. However, when properly justified, they may be used for fault inves
25、tigation. Assessment of ageing and degradation is not included. The tests are not intended to assess the durability of upholstery, i.e. filling materials and covers. Data are given for the design of seat-loading pads in Annex A (normative) and for the design of stability-loading pad in Annex B (norm
26、ative). 2 Normative references The following referenced documents are indispensable for the application 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 1335-2:2009, Of
27、fice furniture Office work chair Part 2: Safety requirements 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 office work chair piece of seating furniture for one person, with a back rest, with or without arm rests, whose upper part, which inc
28、ludes the seat, can rotate in the horizontal plane and can be adjusted in height NOTE Other adjustments may be included. 3.2 column office work chair component that connects the base and the seat structure NOTE A column normally incorporates a seat height adjustment and swivel mechanism. BS EN 1335-
29、3:2009EN 1335-3:2009 (E) 5 3.3 locking device device which inhibits the movement of the seat action and/or the back rest 3.4 arm rest length distance between vertical lines through its front and rear edges NOTE In the case of an arm rest, which is not horizontal or which is curved, the length is mea
30、sured in a horizontal plane 20 mm below the highest point of the arm rest. 3.5 supporting point castor or glide 4 General test conditions 4.1 Preliminary preparation The unit shall be assembled and/or configured according to the instructions supplied with it. The most adverse configuration shall be
31、used for each test, see Table 1. For testing a range of related chair models, only worst case(s) need to be tested. If mounting or assembly instructions are not supplied, the mounting or assembly method shall be recorded in the test report. Fittings shall not be re-tightened unless specifically requ
32、ired by the manufacturer. If the configuration must be changed to produce the worst case conditions, any re-tightening of the fittings shall be recorded in the test report. Unless otherwise stated all tests shall be carried out on the same sample. The tests shall be carried out in indoor ambient con
33、ditions. 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. 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 f
34、rom the test procedure recorded in the test report. Before beginning the testing, visually inspect the unit thoroughly. Record any defects so that they are not assumed to have been caused by the tests. Carry out measurements if specified. 4.2 Test equipment Unless otherwise specified, the tests may
35、be applied by any suitable device because results are dependent only upon correctly applied forces and not on the apparatus. The equipment shall not inhibit deformation nor cause unnatural deformation of the unit/component, i.e. it shall be able to move so that it can follow the deformation of the u
36、nit/component 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. If a loading pad tends to slide use a slip resistant material between the loading pad and the
37、surface being tested. 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. Each force shall be maintained for not less than 10 s and not more than 15 s. BS EN 1335-3:2009EN 1335-3:2009 (E) 6 The forces
38、in durability tests shall be applied at a rate to ensure that excessive heating does not occur. Each force shall be maintained for (2 1) s. The forces may be applied using masses. 4.4 Tolerances Unless otherwise stated, the following tolerances are applicable: Forces: 5 % of the nominal force Masses
39、: 1 % of the nominal mass Dimensions: 5 mm of the nominal dimension on soft surfaces 1 mm of the nominal dimension on all other surfaces Angles: 2 of the nominal angle The accuracy for the positioning of loading pads shall be 5 mm. The tests specify the application of forces. Masses may, however, be
40、 used. The relation 10 N for 1 kg may be used for this purpose. 4.5 Sequence of testing All applicable tests shall be carried out on the same sample. The sequence of the safety tests shall be as specified in EN 1335-2:2009, 4.2. If functional tests shall be carried out, this shall be done in the seq
41、uence of Table C.1 after completing all the safety tests specified in EN 1335-2. 4.6 Inspection and assessment of results After completion of each test, inspect the unit again. Record any changes including: a) fracture of any component or joint; b) loosening of any joint intended to be rigid, which
42、can be demonstrated by hand pressure; c) deformation or wear of any part or component such that its function is impaired; d) loosening of any means of fixing components to the unit; e) changes that may affect stability. BS EN 1335-3:2009EN 1335-3:2009 (E) 7 Table 1 Positioning of chair components Cl
43、ause Test Seat height Seat Back restin height Back rest in depth Tilt stiffness adjustment Castors and base Arm rest Foot rest 7.1.1 Front edge overturning highest position foremost position highest position foremost position maximum tension most likely to cause overturning most likely to cause over
44、turning 7.1.2 Forward overturning highest position foremost position highest position foremost position maximum tension most likely to cause overturning most likely to cause overturning - 7.1.3 forward overturning for chairs with foot rest highest position foremost position lowest position foremost
45、position maximum tension most likely to cause overturning most likely to cause overturning most likely to cause overturning7.1.4 Sideways overturning for chairs without arm rests highest position foremost position highest position foremost position maximum tension most likely to cause overturning -
46、- 7.1.5 Sideways overturning for chairs with arm rests highest position foremost position highest position foremost position maximum tension most likely to cause overturning most likely to cause overturning - 7.1.6 Rearwards overturning of chairs without back rest inclination highest position rearmo
47、st position highest position rearmost position minimum tension most likely to cause overturning most likely to cause overturning - 7.1.7 Rearwards overturning of chairs with back rest inclination highest position rearmost position highest position rearmost position minimum tension most likely to cau
48、se overturning most likely to cause overturning - 7.2.1 Seat front edge static load test highest position foremost position - - - - - - 7.2.2 Combined seat and back static load highest position most adverse position highest position rearmost position mid range least likely to cause overturning - - 7
49、.2.3 Arm rest downward static load test central lowest position horizontal - - - - most likely to cause failure - 7.2.4 Arm rest downward static load test front lowest position horizontal - - - - highest, foremost position - 7.2.5 Arm rest sideways static load test lowest position horizontal - - - - highest, widest position - 7.2.6 Foot rest static load test - - - - - least likely to cause overturning - highest position 7.3.1 Seat and back durability highes
