ISO INTERNATIONAL STANDARD 16840-1 First edition 2006-03-15 Wheelchair seating - Part 1: Vocabulary, reference axis convention and measures for body segments, posture and postural support surfaces Sieges de fauteuils roulants - Partie 1: Vocabulaire, convention des axes de reference et mesures des segments corporels, des surfaces de posture et du siege Reference number ISO 16840-1:2006(E) @ ISO 2006 ISO 16840-1:2006(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shalt not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In dowloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The Iso Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation ?ISO2006 The reproduction of the terms and definitions contained in this International Standard is permited in teaching manuals, instruction booklets, technical publications and journals for strictly educational or implementation purposes. The conditions for such reproduction are: that no modifications are made to the terms and definitions; that such reproduction is not permitted for dictionaries or similar publications offered for sale; and that this International Standard is referenced as the source document. With the sole exceptions noted above, no other part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IsO at the address below or IsO's member body in the country of the requester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ ISO 2006 - All rights reserved ISO 16840-1:2006(E) Contents Page Foreword. iv Introductior 1 Scope. 2 General terms and definitions 3 Abbreviated terms and subscripts.. 3.1 Abbreviated terms .... 3.2 Subscripts ... 4 Global coordinate system principles ... 4.1 General.. 4.2 Structure 5 Terms and definitions of an integrated geometric reference system, 5.1 General... 5.2 Global coordinate system.. 5.3 Wheelchairaxissystem(WAS).. 5.4 Support surface axis system (SsAs).... 10 5.5 Seated anatomical axis system (SAAS) 11 6 Terms and definitions of support surface measures. 12 6.1 General.. 12 6.2 Terms and definitions of support surface measures in the sagittal view.. 13 6.3 Terms and definitions of support surface measures in the frontal view .. 20 6.4 Terms and definitions of support surface measures in the transverse view... .26 7 Terms and definitions of body measures of a seated person .30 7.1 General...... 30 7.2 Terms and definitions of body measures in the sagittal plane 7.3 Terms and definitions of body measures in the frontal view... .41 7.4 Terms and definitions of body measures in the transverse plane ... .50 Annex A (normative) Definition of reference lines for common seating support surfaces ... .. 56 Annex B (normative) Calculations of joint centres... Annex C (informative) Abdominal and sternal body segment lines for use in sagittal and frontal body measures... .68 Bibliography .... 74 Alphabetical index 75 ii ISO 16840-1:2006(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies). The work of preparing International Standards is normally carried out through IsO technical committees. Each member body interested in a subject for which a technical committee has been non-governmental, in liaison with iso, also take part in the work. Iso collaborates closely with the International Electrotechnical Commission (IE