ISO 16840-2:2018/Amd 1:2024

Wheelchair seating — Part 2: Determination of physical and mechanical characteristics of seat cushions intended to manage tissue integrity — Amendment 1: Updates and addition of new Annex covering alternatively sized cushions

ISO 16840-2:2018/Amd 1:2024

Name:ISO 16840-2:2018/Amd 1:2024   Standard name:Wheelchair seating — Part 2: Determination of physical and mechanical characteristics of seat cushions intended to manage tissue integrity — Amendment 1: Updates and addition of new Annex covering alternatively sized cushions
Standard number:ISO 16840-2:2018/Amd 1:2024   language:English language
Release Date:23-Apr-2024   technical committee:ISO/TC 173/SC 1 - Wheelchairs
Drafting committee:ISO/TC 173/SC 1 - Wheelchairs   ICS number:11.180.10 - Aids and adaptation for moving
International
Standard
ISO 16840-2
Second edition
Wheelchair seating —
2018-01
Part 2:
AMENDMENT 1
Determination of physical and
2024-04
mechanical characteristics of seat
cushions intended to manage tissue
integrity
AMENDMENT 1: Updates and addition
of new Annex covering alternatively
sized cushions
Sièges de fauteuils roulants —
Partie 2: Détermination des caractéristiques physiques et
mécaniques des coussins d'assise et dispositifs de répartition de
pression
AMENDEMENT 1: Mises à jour et ajout d'une nouvelle annexe
couvrant les coussins d’autres dimensions
Reference number
ISO 16840-2:2018/Amd.1:2024(en) © ISO 2024

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ISO 16840-2:2018/Amd.1:2024(en)
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© ISO 2024 – All rights reserved
ii

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ISO 16840-2:2018/Amd.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
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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 – All rights reserved
iii

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ISO 16840-2:2018/Amd.1:2024(en)
Wheelchair seating —
Part 2:
Determination of physical and mechanical characteristics of
seat cushions intended to manage tissue integrity
AMENDMENT 1: Updates and addition of new Annex covering
alternatively sized cushions

5.7
Replace list items a) and b) with the following:
a) Two 50 mm ± 2 mm diameter indenters, centres spaced 110 mm ± 5 mm apart, representing ischial
tuberosities.
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 to 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 Annexes D and E.

11.2
Replace list items f) to k) with the following:
f) Apply a vertical l
...

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