Bsi bs en 00716 2 2008 + a1 2013

BRITISH STANDARD Furniture — Children’s cots and folding cots for domestic use — Part 2: Test methods ICS 97.140; 97.190 BS EN 716-2:2008 +A1:2013 BS EN 716-2:2008+A1:2013 National foreword This British Standard is the UK implementation of EN 716-2:2008+A1:2013 It supersedes BS EN 716-2:2008, which is withdrawn The start and finish of text introduced or altered by amendment is indicated in the text by tags Tags indicating changes to CEN text carry the number of the CEN amendment For example, text altered by CEN amendment A1 is indicated by !" The UK participation in its preparation was entrusted by Technical Committee CW/1, Safety of child use and child care products, to Technical Subcommittee CW/1/5, Nursery furniture A list of organizations represented on this subcommittee can be obtained on request to its secretary This publication does not 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 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2008 © The British Standards Institution 2013 Published by BSI Standards Limited 2013 ISBN 978 580 70909 Amendments/corrigenda issued since publication Date Comments 28 February 2013 Implementation of CEN amendment A1:2013 EUROPEAN STANDARD EN 716-2:2008+A1 NORME EUROPÉENNE EUROPÄISCHE NORM January 2013 ICS 97.140 English Version Furniture - Children's cots and folding cots for domestic use Part 2: Test methods Meubles - Lits nacelle fixes et pliants usage domestique pour enfants - Partie : Méthodes d'essai Möbel - Kinderbetten und Reisekinderbetten für den Wohnbereich - Teil 2: Prüfverfahren This European Standard was approved by CEN on February 2008 and includes Amendment approved by CEN on 17 November 2012 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref No EN 716-2:2008+A1:2013: E BS EN 716-2:2008+A1:2013 EN 716-2:2008+A1:2013 (E) Contents Page Foreword Scope Normative references 3.1 3.2 3.3 3.4 3.5 3.6 General test conditions Preliminary preparation Test equipment Application of forces .6 Tolerances Test sequence Prevention of movement during test 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 4.11 4.12 4.13 4.14 4.14.1 4.14.2 4.15 4.16 Test apparatus .6 Measuring probes Bottom impactor Test mattress Side impactor Loading pad Stops .9 Floor surface 10 Test chain and mass 10 Small parts cylinder 10 Test mass 11 Bite tester 11 Retaining block 12 Foothold template 12 Head probes 13 Small head probe 13 Large head probe 14 Template for V-shaped openings 14 Test dummy 15 5.1 5.2 5.3 5.3.1 5.3.2 5.3.3 5.4 5.4.1 5.4.2 5.5 5.5.1 5.5.2 5.5.3 5.6 5.7 5.7.1 5.7.2 5.8 5.8.1 Test procedures 15 Assembly and inspection 15 !Stability - test" 16 Footholds 16 !Determination of a foothold" 16 !Tests for footholds" 18 !Measurement of distance between footholds and/or top of cot sides and ends" 21 Measurements 21 Holes, gaps and openings inside the cot 21 Holes, gaps and openings on the outside of the cot 22 Small parts 24 General 24 Torque test 24 Tension test 25 Bite test 25 !Tests for cot base and mattress base" 26 !Folding test of the mattress base and cot base" 26 !Strength of cot base and mattress base (impact test)" 26 Strength of sides and ends 27 Static load test of !deleted text" slats (bending test) 27 BS EN 716-2:2008+A1:2013 EN 716-2:2008+A1:2013 (E) 5.8.2 5.8.3 5.8.4 5.9 5.9.1 5.9.2 5.10 5.11 5.11.1 5.11.2 5.12 Strength of sides or side slats (impact test) 27 Strength of corners (impact test) 30 Strength of mesh and flexible sides and ends (static load test) 30 Strength of frame and fastenings 31 Vertical static load test 31 Durability test 32 Snag points 33 Locking mechanisms 33 Durability 33 Strength 33 Stability test 33 Test report 33 Annex A (informative) !A–deviations" 35 Bibliography 36 BS EN 716-2:2008+A1:2013 EN 716-2:2008+A1:2013 (E) Foreword This document (EN 716-2:2008+A1:2013) 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 July 2013, and conflicting national standards shall be withdrawn at the latest by July 2013 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 716-2:2008." This document includes Amendment approved by CEN on 17 November 2012 The start and finish of text introduced or altered by amendment is indicated in the text by tags !" Significant technical differences between this edition and EN 716-2:1995 are as follows: a) Following items were made more concrete or introduced: Test equipment (3.2), Application of forces (3.3), Tolerances (3.4) and under Test equipment (4), Test mattress (4.3), Device for bite test (4.11), Template for foot hold (4.13), Head probes (4.14), Testing device for V-shaped openings (4.15) and Retaining block (4.12); b) Elaboration and specification of the test procedures (5), Assembly and inspection (5.1), for the measurements of closed openings testing with at test probe (5.3.2.1) and measurement of V-shaped openings testing with a test probe (5.3.2.2) were introduced, Small parts (5.4), Bite test (5.5), Strength of sides and ends (5.7), Snag points (5.9) and Locking mechanisms (5.11); c) Testing of brakes of the rollers and test chain with disc were deleted; d) Revised editorially and with regard to content 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom BS EN 716-2:2008+A1:2013 EN 716-2:2008+A1:2013 (E) Scope This part of EN 716 specifies test methods for assessing the safety of children's cots and folding cots for domestic use It applies to children’s cots and folding cots with an internal length greater than 900 mm but not more than 400 mm 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 ISO 2439:2000, Flexible cellular polymeric materials - Determination of hardness (indentation technique) (ISO 2439:1997, including Technical Corrigendum 1:1998) ISO 7619-2, Rubber, vulcanized or thermoplastic — Determination of indentation hardness — Part 2: IRHD pocket meter method 3.1 General test conditions Preliminary preparation The tests are designed to be applied to a cot that is fully assembled and ready for use The test unit shall be stored in indoor ambient conditions for at least one week immediately prior to testing Any deviation from this procedure shall be stated in the test report Before testing, any fabrics intended to be removable shall be cleaned or washed twice in accordance with the manufacturer's instructions If no instructions are supplied, the manner of washing/cleaning shall be stated in the test report The tests shall be carried out under indoor ambient conditions, but if during a test the atmospheric temperature is outside the range 15 °C to 25 °C, the maximum and/or minimum temperature shall be recorded in the test report The cot shall be tested as delivered If the cot is a knock down type, it shall be assembled according to the manufacturer's instructions supplied with the cot If the cot can be assembled, combined or adjusted in different ways, the most adverse combination shall be used for each test Knock-down fittings shall be tightened before testing Further re-tightening shall not take place unless this is specifically required by the manufacturer 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 a list made of the deviations from the test procedures 3.2 Test equipment Unless otherwise specified, the tests may be applied by any suitable device because results are dependent only upon correctly applied forces and loads and not upon the apparatus BS EN 716-2:2008+A1:2013 EN 716-2:2008+A1:2013 (E) The equipment shall not inhibit the deformation of the cot during testing It shall be able to move so that it can follow the deformation of the cot during testing, so that the loads are always applied at the specified point and in the specified direction 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 3.3 Application of forces The forces in the static load tests shall be applied sufficiently slowly enough to ensure that negligible dynamic force is applied The forces in durability tests shall be applied at a rate to ensure that excessive heating does not occur 3.4 Tolerances Unless otherwise stated, the following tolerances apply:  Forces: ± % of the nominal force;  Masses: ± 0,5 % of the nominal mass;  Dimensions: ± 1,0 mm of the nominal dimension;  Angles:  Positioning of loading pads: ± mm;  Duration of forces: ( ± 1) s for durability tests (10 ± 2) s for static load tests, including tension, torque and bite tests ± 2° of the nominal angle; The tests are described in terms of the application of forces Masses can, however, be used The relationship 10 N = kg shall be used for this purpose 3.5 Test sequence The tests shall be carried out in the order laid down in this standard and on the same cot 3.6 Prevention of movement during test If the cot tends to slide or roll during the tests specified in clause 5, it shall be restrained by stops (4.6) 4.1 Test apparatus Measuring probes Probes made of plastics or other hard, smooth material mounted on a force-measuring device There shall be one probe with a diameter of mm (-0,1/+0 mm), see Figure 1a There shall be five probes with an angle of 30° ± 0,5° with diameters of 25 mm (0/+0,1 mm), 45 mm (0/+0,1 mm), 60 mm (0/+0,1 mm), 65 mm (0/+0,1 mm) and 85 mm (0/+0,1 mm) with conical ends, see Figure 1b BS EN 716-2:2008+A1:2013 EN 716-2:2008+A1:2013 (E) There shall be four cylindrical probes with diameters of mm (-0,1/+0 mm), mm (-0,1/+0 mm), 12 mm (0/+0,1 mm) and 18 mm (0/+0,1 mm) with hemispherical ends, see Figure 1c Figure a— mm probe Figure b — Conical probes Figure c — Cylindrical probes Key Ø mm (-0,1/+0 mm), Ø mm (-0,1/+0 mm), Ø 12 mm (0/+0,1 mm), Ø 18 mm (0/+0,1 mm) Figure 4.2 Bottom impactor An impactor with a total mass of 10 kg of hardwood or equivalent material with a hemispherical end and with dimensions in accordance with Figure The impactor shall be guided so that it is kept vertical and always falls on the impact point BS EN 716-2:2008+A1:2013 EN 716-2:2008+A1:2013 (E) Dimensions in millimetres Figure — Bottom impactor 4.3 Test mattress A PUR foam sheet with a thickness of 60 mm, a bulk density of (35 ± 2) kg/m and an indentation hardness index of (170 ± 40) N in accordance with A.40 of EN ISO 2439:2000 and being at least 400 mm × 800 mm in area but not larger than the mattress base of the cot under test The test mattress shall have a cotton cover 2 with a mass per unit area of 100 g/m to 120 g/m 4.4 Side impactor A pendulum with a cylindrical head made of steel (Figure 3) The head of the pendulum shall be surrounded by a 10 mm thick layer of rubber of hardness 76 IRHD to 78 IRHD in accordance with ISO 7619-2 The total mass shall be kg BS EN 716-2:2008+A1:2013 EN 716-2:2008+A1:2013 (E) ! Key is not a hazard is a hazard Figure 24 — Method of insertion of portion A" 5.5 Small parts 5.5.1 General These tests are applicable only to small parts which are considered grippable by a child and which may fit wholly into the small parts cylinder (4.9) A part is considered to be grippable by a child if it can grip the part between its thumb and forefinger or between its teeth The tension test (5.4.3) shall be carried out after the torque test (5.4.2) and on the same part as used for the torque test 5.5.2 Torque test Apply a torque gradually to the part within a period of approximately s in a clockwise direction until either: a) rotation of 180° from the original position has been attained; or b) torque of 0,34 Nm is reached The maximum rotation or required torque shall be applied for (10 ± 2) s The part shall then be allowed to return to a relaxed condition and the procedure repeated in an anticlockwise direction Where projections, parts or assemblies are rigidly mounted on an accessible rod or shaft designed to rotate together with the projections, parts or assemblies, the rod or shaft shall be clamped to prevent rotation during the test 24 BS EN 716-2:2008+A1:2013 EN 716-2:2008+A1:2013 (E) If a part which is attached by a screw thread that becomes loosened during application of the required torque, the torque shall continue to be applied until the required torque is exceeded or the part disassembles or it becomes apparent that the part will not disassemble When using clamps and test equipment care shall be taken not to damage the attachment mechanism or body or the part 5.5.3 Tension test Apply a tensile force to the part through a clamp or by other suitable means Apply a force of:  50 N where the largest accessible dimension is less than or equal to mm;  90 N where the largest accessible dimension is greater than mm Apply the force gradually over approximately s and maintain for (10 ± 2) s If the part has become detached, check whether the part fits wholly within the small parts cylinder (4.9) 5.6 Bite test The bite test shall be carried out in two stages: a) pinch the materials of the inside face of the cot rim between finger and thumb and attach the bite tester (4.11) so as to “bite” the smallest amount of materials possible to allow contact with all four teeth and apply a pulling force of 50 N, maintaining it for 10 s to the bite tester; then b) open the jaws of the bite tester as far as possible and push it horizontally onto the cot rim as far as the guide, allow the teeth to close on the cot rim and apply a pulling force of 50 N, maintaining it for 10 s to the bite tester This test procedure shall be applied to the following positions of the cot rim: c) centre of the longest straight edge; d) centre of the longest radiused portion; e) centre of the smallest radiused portion; f) any joint or seam; g) any other position considered more onerous If, during the test procedure, the outer material of the cot rim is punctured by the teeth, remove the outer material to expose the layer below or the filling and repeat stages a and b until the filling cannot be reached or no filling becomes detached As soon as any filling becomes detached the test shall be terminated A puncture has occurred when at least one tooth of the bite tester has broken the textile or plastic material to which it is being applied, the tooth passing through the entire thickness of the material Where the bite tester is applied to materials of a loose weave or open mesh, a puncture has occurred when part of the weave or mesh is broken by at least one of the teeth of the bite tester If the teeth of the bite tester pass a loose weave or open mesh without damaging the material, a puncture has not occurred 25 BS EN 716-2:2008+A1:2013 EN 716-2:2008+A1:2013 (E) 5.7 !Tests for cot base and mattress base" ! 5.7.1 Folding test of the mattress base and cot base Apply a force of 50 N to the bed base or mattress bed base by pulling or pushing the bed base or mattress bed base in the position most likely to cause folding of the short and/or of the long side The force shall not be applied on any attachment device (e.g.: button, touch-and-close fastener, etc.)." ! 5.7.2 Strength of cot base and mattress base (impact test)" Place the test mattress (4.3) flat on the cot base or mattress base Drop the bottom impactor (4.2) 000 times, at a rate of not more than 30 times per min, through a distance of 150 mm above the cot base or mattress base, onto the test mattress at each of the selected positions of impact The impacter shall fall freely and bouncing shall not be restricted The impacter shall not hit the test mattress on the same position when alternating between the impact points The test mattress shall not be used for more than complete tests The points of impact shall be a) to f) as follows, see !Figure 25": a) any corner; b) any place where the bottom appears weakest, or - if no specific weak spot can be selected - in the corner diagonally opposite a); c) centre of one side; d) centre of one end; e) centre of the cot base; f) if the cot base can have more than one height position, and if its support construction is not the same for the different positions, the base shall be tested additionally in its highest position, but then only at the two diagonal corners that have not been tested ! 26 BS EN 716-2:2008+A1:2013 EN 716-2:2008+A1:2013 (E) Figure 25 — Points of impact" The horizontal distance between the side of the impacter and the outer edge of the cot base or mattress base shall be 50 mm at points a, c, d, and f Remove the test mattress and check if parts of the cot base or mattress base are broken or if the cot base or mattress base has loosened from its fastening Carry out inspection according to 5.1 5.8 5.8.1 Strength of sides and ends Static load test of !deleted text" slats (bending test) Position the cot on the floor (4.7) with all the legs secured by stops (4.6) Prevent the cot from tilting !Apply a force of 250 N in turn to one slat positioned in the middle and one at the end and to any other slat likely to cause failure." The force shall act horizontally in the directions of the longitudinal and transverse axis of the cot It shall be applied midway between the top and the bottom of the slat The load duration shall be 30 s Carry out inspection according to 5.1 Record any break 5.8.2 Strength of sides or side slats (impact test) Position the cot on the floor (4.7) with all legs secured by stops (4.6) Prevent the cot from tilting Place the side impactor (4.4) so that the impact acts on the side slat or side, from both the outside and inside directions, at a height of 200 mm below the top edge of the side (see !Figure 26") One slat shall be hit from the outside, the next from the inside, and so forth Carry out the test first from the outside and subsequently from the inside When testing cots with solid sides, the impacts shall act on ten evenly distributed positions on the long sides and four evenly distributed positions on the end sides, with the direction of impact alternating from inside to outside the cot Allow the impacter to swing freely from a horizontal position onto the side slat or side Repeat 10 times, then position the impacter at the next slat or next point of impact Continue the test until all slats or all previously determined impact points have been tested 27 BS EN 716-2:2008+A1:2013 EN 716-2:2008+A1:2013 (E) Carry out inspection according to 5.1 28 BS EN 716-2:2008+A1:2013 EN 716-2:2008+A1:2013 (E) !Dimensions in millimetres Side view Front view Figure 26 — Impacter for sides" 29 BS EN 716-2:2008+A1:2013 EN 716-2:2008+A1:2013 (E) 5.8.3 Strength of corners (impact test) Position the cot on the floor (4.7) with all legs secured by stops (4.6) Prevent the cot from tilting Position the impacter to hit the side frames as high and as close to the corner post as possible (!Figure 27") Allow the impacter to swing freely from an angle of 60° from the vertical Carry out this procedure at each side member in each corner of the cot making five impacts from inside the cot and five impacts from outside the cot at each position Carry out inspection according to 5.1 ! Side view Front view Figure 27 — Impacter for corners" 5.8.4 Strength of mesh and flexible sides and ends (static load test) Position the cot on the floor (4.7) with the legs against stops (4.6) and the base in its lowest position At the side/end to be tested, position the retaining blocks (4.12) so that the front sides of the blocks touch the upper edge of the cot from the outside (!Figure 28") but without applying a force to the cot edge Fix the retaining blocks to a permanent or rigid structure, but not to the cot, to prevent their movement The distance between the retraining blocks shall be 400 mm The force shall be applied on each mesh or fabric side midway between the top and the bottom of the side/end at the most onerous point such that the loading position lies on a vertical line midway between the retaining blocks From inside the cot gradually apply a horizontal outwards force of 250 N three times at each point by means of a loading pad (4.5) against the cot side/end Maintain the force for 30 s (!Figure 28") Carry out inspection according to 5.1 Record any break or loosened seam 30 BS EN 716-2:2008+A1:2013 EN 716-2:2008+A1:2013 (E) !Dimensions in millimetres Key Loading pad Retaining block Stop Figure 28 — Example of applying the force at the mesh or fabric side" 5.9 5.9.1 Strength of frame and fastenings Vertical static load test Apply a vertical downwards force of 300 N as shown in !Figure 29" to the top of the cot side 10 times All sides and ends of different construction shall be tested Carry out inspection according to 5.1 ! Figure 29 — Example of applying the load" 31 BS EN 716-2:2008+A1:2013 EN 716-2:2008+A1:2013 (E) 5.9.2 Durability test Position the cot on the floor (4.7) with all the legs secured by stops (4.6) Position a mass of 20 kg distributed over an area of approximately 150 mm × 150 mm at the centre of the bottom of the cot The mass may consist of more than one part Apply forces of 100 N by means of loading pads (4.5) and a device that can press the cot in directions horizontally, with of the forces in the longitudinal (AB) direction and in the lateral direction (CD) opposite each other (!Figure 30") The durability forces shall be applied for 000 cycles on each point in turn in the order A, B, C, D or A-B followed by C-D (which equals one cycle) ! Figure 30 — Durability test" The points for applying the forces (A, B, C, D) shall be located 50 mm from the intersection point of the centrelines of the side members at the highest point at that position (see Figure 31) Carry out inspection according to 5.1 !Dimensions in millimetres Figure 31 — Durability test" 32 BS EN 716-2:2008+A1:2013 EN 716-2:2008+A1:2013 (E) 5.10 Snag points Place the cot base in its lowest position This test shall be carried out using one hand only Hold the weight (4.8) in one hand Using fingers of the same hand, create an open loop at the connection between the test chain (4.8) and the weight Place the open loop over any potential snag point accessible from the inside of the cot Lower the weight until either the loop gets caught and the weight hangs freely from the snag point or the loop slides over the edge Carry out the test three times at each position Record whether the loop of the test chain gets caught under the load of the spherical weight hanging freely 5.11 Locking mechanisms 5.11.1 Durability Operate (close and open) the locking mechanism 300 times When applicable, measure the force needed for the operation In the case of revolving elements, measure the tangential force 5.11.2 Strength This test applies only to folding cots Erect the cot in accordance with the manufacturer's instructions Position the cot on the floor (4.7) with the legs against stops (4.6) If the cot tends to tilt secure it in a manner which does not prevent folding Apply a force of 200 N to the frame in the most onerous direction(s) trying to fold the cot For each direction, apply the force five times for each ! 5.12 Stability test Repeat test according to 5.2." Test report The test report shall include at least the following information: a) reference to this part of this standard (!EN 716-2:2008+A1:2013"); b) unit tested (relevant data); c) description of the delivery condition of the unit; d) test results in accordance with clause 5; e) conformance to requirements; 33 BS EN 716-2:2008+A1:2013 EN 716-2:2008+A1:2013 (E) f) details of any deviations from this part of this standard; g) name and address of the test facility; h) date of the test 34 BS EN 716-2:2008+A1:2013 EN 716-2:2008+A1:2013 (E) Annex A (informative) !A–deviations A- deviation: National deviation due to regulations, the alteration of which is for the time being outside the competence of the CEN/ CENELEC member This European Standard does not fall under any Directive of the EU In the relevant CEN/ CENELEC countries these A- deviations are valid instead of the provisions of the European Standard until they have been removed SWEDEN Clause Deviation 5.4.1 Children’s cots provided on the Swedish market shall have a distance < 25 mm between two adjacent slats of the cot base When tested in accordance with 5.4.1 of EN 716-2 + A1: 2013, it shall not be possible for the 25 mm cone to pass between two adjacent slats of the cot base This is the interpretation of the Swedish Product Safety Act made by the Swedish Market Court in two court cases: MD 1991:30 and MD 2005:15 " 35 BS EN 716-2:2008+A1:2013 EN 716-2:2008+A1:2013 (E) Bibliography [1] EN 71-1:2005, Safety of Toys - Part 1: Mechanical and physical properties [2] EN 716-1, Children's cots and folding cots for domestic use — Part 1: Safety requirements 36 This page deliberately set blank British Standards Institution (BSI) BSI is the independent national body responsible for preparing British Standards and other standards-related publications, information and services It presents the UK view on standards in Europe and at the international level BSI is incorporated by Royal Charter British Standards and other standardization products are published by BSI Standards Limited Revisions Information on standards British Standards and PASs are periodically updated by amendment or revision Users of British Standards and PASs should make sure that they possess the latest amendments or editions It is the constant aim of BSI to improve the quality of our products and services We would be grateful if anyone finding an inaccuracy or ambiguity while using British Standards would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover Similary for PASs, please notify BSI Customer Services Tel: +44 (0)20 8996 9001 Fax: +44 (0)20 8996 7001 BSI provides a wide range of information on national, European and international standards through its Knowledge Centre BSI offers BSI Subscribing Members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of British Standards and PASs Tel: +44 (0)20 8996 7002 Fax: +44 (0)20 8996 7001 Email: membership@bsigroup.com Tel: +44 (0)20 8996 7669 Fax: +44 (0)20 8996 7001 Email: plus@bsigroup.com Information regarding online access to British Standards and PASs via British Standards Online can be found at www.bsigroup.com/BSOL Further information about British Standards is available on the BSI website at www.bsigroup.com/standards Buying standards You may buy PDF and hard copy versions of standards directly using a credit card from the BSI Shop on the website www.bsigroup.com/shop In addition all orders for BSI, international and foreign standards publications can be addressed to BSI Customer Services Tel: +44 (0)20 8996 9001 Fax: +44 (0)20 8996 7001 Email: orders@bsigroup.com In response to orders for international standards, BSI will supply the British Standard implementation of the relevant international standard, unless otherwise requested Tel: +44 (0)20 8996 7004 Fax: +44 (0)20 8996 7005 Email: knowledgecentre@bsigroup.com BSI Subscribing Members are kept up to date with standards developments and receive substantial discounts on the purchase price of standards For details of these and other benefits contact Membership Administration Copyright All the data, software and documentation set out in all British Standards and other BSI publications are the property of and copyrighted by BSI, or some person or entity that owns copyright in the information used (such as the international standardization bodies) has formally licensed such information to BSI for commercial publication and use Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means – electronic, photocopying, recording or otherwise – without prior written permission from BSI This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained Details and advice can be obtained from the Copyright & Licensing Department Tel: +44 (0)20 8996 7070 Email: copyright@bsigroup.com BSI 389 Chiswick High Road London W4 4AL UK Tel +44 (0)20 8996 9001 Fax +44 (0)20 8996 7001 www.bsigroup.com/standards raising standards worldwide™