ISO 16840-2:2018/Amd 1:2024

FINAL DRAFT
Amendment
ISO 16840-2:2018/
FDAM 1
ISO/TC 173/SC 1
Wheelchair seating —
Secretariat: SABS
Part 2:
Voting begins on:
2024-01-31
Determination of physical and
mechanical characteristics of seat
Voting terminates on:
2024-03-27
cushions intended to manage tissue
integrity
AMENDMENT 1: Updates and addition
of new Annex covering alternatively
sized cushions
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO 16840-2:2018/FDAM 1:2024(en) © ISO 2024

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FINAL DRAFT
ISO 16840-2:2018/FDAM 1:2024(en)
Amendment
ISO 16840-2:2018/
FDAM 1
ISO/TC 173/SC 1
Wheelchair seating —
Secretariat: SABS
Part 2:
Voting begins on:
Determination of physical and
mechanical characteristics of seat
Voting terminates on:
cushions intended to manage tissue
integrity
AMENDMENT 1: Updates and addition
of new Annex covering alternatively
sized cushions
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
COPYRIGHT PROTECTED DOCUMENT
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2024
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO 16840-2:2018/FDAM 1:2024(en) © ISO 2024

© ISO 2024 – All rights reserved
ii

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ISO 16840-2:2018/FDAM 1:2024(en)
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 established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. 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 described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 173, Assistive products, Subcommittee SC 1,
Wheelchairs.
A list of all the parts of ISO 16840 can be found on the ISO website.

© ISO 2024 – A
...

2022-11-16
ISO 16840-2:2018/DAM FDAmd 1:2022(E)
ISO/TC 173/SC1/WG11SC 1
Secretariat: SABS
Date: 2024-01-17
Wheelchair seating —
Part 2:
Determination of physical and mechanical characteristics of seat
cushions intended to manage tissue integrity
AMENDMENT 1 : Amended: Updates and addition of new Annex
covering alternatively sized cushions
Sièges de fauteuils roulants — Partie 2:
coveringDétermination·des·caractéristiques·physiques·et·mécaniques·des·coussins·d'assise·et·disp
ositifs·de·répartition·de·pression

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FDIS stage

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ISO 16840-2:2018/DAM FDAmd 1:2022(E(en)
© ISO 20222024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
EmailE-mail: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© ISO 2024 – All rights reserved

iii
© ISO 2022 – All rights reserved
iii

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ISO 16840-2:2018/DAM FDAmd 1:2022(E(en)
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
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. 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 described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of
ISO document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s)
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 173, Assistive products, Subcommittee SC 1,
Wheelchairs.
A list of all the parts of ISO 16840 can be found on the ISO website.
© ISO 2022 – All rights reserved
iv
© ISO 2024 – All rights reserved

iv

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ISO 16840-2:2018/FDAmd 1(en)
Wheelchair seating —
Part 2:
Determination of physical and mechanical characteristics of seat
cushions and devices intended to manage tissue integrity
AMENDMENT 1: AmendedUpdates and addition of new Annex covering
alternatively sized cushions

5.7
Replace list items a) and b) with the following:
a) a) Two 50 mm ± 2 mm diameter indenters, centres spaced 110 mm ± 5 mm apart, representing ischial
tuberosities.
b) b) Two 25 mm ± 1 mm diameter indenters, centres spaced 350 mm ± 10 mm apart, representing the
trochanters.

6.1
Replace the text with the following:
6.1  Choice of cushion
Obtain an unused sample seat cushion for testing with a nominal width of 400 mm to450to 450 mm. If a cover
is provided, ensure that it is fitted to the cushion in the orientation specified by the manufacturer.
A cushion with a 400 mm to 450 mm nominal width is the size for the RCLI indenter specified in Annex A and
the LCI indenter in 5.7. Indenters for testing alternative cushion sizes are specified in
...