BS IS0 24496:2021 BSl Standards Publication Office furniture Office chairs Methods for the determination of dimensions bsi. BSISO24496:2021 BRITISH STANDARD Nationalforeword This British Standard is the UK implementation of IS0 24496:2021. It supersedes BSIS024496:201Z, which is withdrawn. The UK participation in its preparation was entrusted to Technical CommitteeFW/o/3,OfficeFurniture. A list of organizations represented on this committee can be obtained on requestto its committeemanager. This publication does not purport to include all the necessary provisions ofa contract.Users areresponsiblefor its correctapplication. @TheBritishStandards Institution2021 Published byBSI Standards Limited 2021 ISBN9780539025910 ICS 97.140 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Amendments/corrigendaissuedsincepublication Date Textaffected BSIS0 24496:2021 INTERNATIONAL ISO STANDARD 24496 Second edition 2021-02-04 Office furniture Office chairs Methods for the determination of dimensions Mobilierdebureau-Sieges detravail pour bureau-Methodes pourdéterminerlesdimensions Reference number ISO 24496:2021(E) ISO @ ISO 2021 BSIS024496:2021 IS024496:2021(E) COPYRIGHTPROTECTEDDOCUMENT ISo 2021,Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISo at the address below or ISo's member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8. CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org i @ IS0 2021 - All rights reserved BSISO24496:2021 IS024496:2021 Contents Page Foreword ..iv Introduction .. 1 Scope. 2 Normative references 3 Terms and definitions 4 General measurement conditions .22 .22 4.1 General 4.2 Preliminary preparation .22 4.3 .22 Tolerances. 4.4 Measurement uncertainty 23 4.5 Angle-Originandsignconvention 23 5 Test equipment. .24 6 Measurement methods and procedures .26 6.1 General 26 6.2 Chairset-upand placementof CMD .26 6.2.1 Chair set-up. 26 6.2.2 Initial placement of CMD on chair 27 6.2.3 Finalplacementof CMD on chair 29 6.3 Measuring procedures. 29 6.3.1 Initial chairmeasurements .29 6.3.2 Measurementswiththechaircomponents adjustedtotheirminimum positions. .38 6.3.3 Measurementswiththechaircomponentsintheirmaximumpositions ..44. 6.3.4 Measurements withoutthe CMDin the chair ..44 7 Test report ..47 Annex A (normative) Drawings and specifications, PDF files for CMD with 18 stacked segmentlumbarsupportmeasurementmethod .48 AnnexB (informative)Anthropometric equivalentsofterms anddefinitions .52 AnnexC (informative)Rationale .59 Bibliography .62 IS02021-Allrightsreserved ili BSISO24496:2021 IS024496:2021 Foreword Iso (the International Organizationfor Standardization) is a worldwidefederation ofnational standards bodies (iso member bodies).The work of preparing International Standards is normally carried out throughIsotechnical committees.Eachmemberbodyinterested inasubjectforwhichatechnical committee has been established has the right to be represented on that committee. International organizations,governmentalandnon-governmental,inliaisonwithIsO,alsotakepartinthework. Iso collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are describedintheIsO/iECDirectives,Part1.Inparticular,thedifferentapprovalcriterianeededforthe different types ofIso documents should be noted.This document was drafted in accordance with the editorial rules of the Iso/IEC Directives, Part 2 (see www.iso.org/directives)