ISO 10542-3:2005

INTERNATIONAL ISO
STANDARD 10542-3
First edition
2005-02-01

Technical systems and aids for disabled
or handicapped persons — Wheelchair
tiedown and occupant-restraint
systems —
Part 3:
Docking-type tiedown systems
Assistances et aides techniques pour les personnes invalides ou
handicapées — Systèmes d'attache du fauteuil roulant et de retenue
de l'occupant —
Partie 3: Systèmes de fixation par arrimage




Reference number
ISO 10542-3:2005(E)
©
ISO 2005

---------------------- Page: 1 ----------------------
ISO 10542-3:2005(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
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading 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
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.


©  ISO 2005
All rights reserved. Unless otherwise specified, no 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 copyright@iso.org
Web www.iso.org
Published in Switzerland

ii © ISO 2005 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 10542-3:2005(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope. 1
2 Normative references . 1
3 Terms and definitions. 1
4 Design requirements and recommendations. 2
5 Information, identification and instruction. 3
6 Performance requirements and recommendations. 4
7 Test report. 5
Annex A (normative) UDIG specifications . 6
Annex B (informative) Test for wheelchair movement . 11
Bibliography . 16

© ISO 2005 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO 10542-3:2005(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
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 10542-3 was prepared by Technical Committee ISO/TC 173, Assistive products for persons with disability,
Subcommittee SC 1, Wheelchairs.
ISO 10542 consists of the following parts, under the general title Technical systems and aids for disabled or
handicapped persons — Wheelchair tiedown and occupant-restraint sytems:
 Part 1: Requirements and test methods for all systems
 Part 2: Four-point strap-type tiedown systems
 Part 3: Docking-type tiedown systems
 Part 4: Clamp-type tiedown systems
 Part 5: Systems for specific wheelchairs
iv © ISO 2005 – All rights reserved

---------------------- Page: 4 ----------------------
ISO 10542-3:2005(E)
Introduction
Providing effective protection for the wheelchair-seated occupant of a motor vehicle usually requires that after-
market equipment be installed to secure the wheelchair and restrain the person in the wheelchair.
ISO 10542-1 specifies requirements and test methods for all wheelchair tiedown and occupant-restraint
systems (WTORS). Its provisions apply as amended and supplemented by this part of ISO 10542 for
wheelchair tiedown and occupant-restraint systems that use a manual or powered docking system to secure
the wheelchair.
At the time of the drafting of this part of ISO 10542, docking tiedown devices were most often used to allow
wheelchair users to independently secure their wheelchairs in private vehicles. Extending the use of docking
tiedown devices to public vehicles places the added demand that docking devices engage with, and safely
secure, a wide range of wheelchair types. Therefore, this part of ISO 10542 also contains a specification for a
universal docking interface geometry (UDIG). When adopted by both the wheelchair and wheelchair
securement industries, the UDIG specification will allow the user increased independence in wheelchair
securement for a wide range of vehicles, while in all likelihood reducing the time required for loading and
unloading wheelchair passengers.

© ISO 2005 – All rights reserved v

---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 10542-3:2005(E)

Technical systems and aids for disabled or handicapped
persons — Wheelchair tiedown and occupant-restraint
systems —
Part 3:
Docking-type tiedown systems
1 Scope
This part of ISO 10542 specifies design and performance requirements and recommendations, instructions
and warnings for both installers and users, and product marking and labelling, for wheelchair tiedown and
occupant-restraint systems (WTORS) that use a docking-type wheelchair tiedown. It specifies the universal
docking interface geometry (UDIG) and a method of testing wheelchair movement. It is applicable to docking-
type wheelchair tiedown devices intended for securing all types of manual and powered forward-facing
wheelchairs, including scooters with three or more wheels, used by adult passengers and drivers of motor
vehicles.
This part of ISO 10542 is applicable primarily to complete WTORS, but a portion of this part of ISO 10542 can
also be applied to components and sub-assemblies sold separately and for replacement parts.
2 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.
ISO 10542-1:2001, Technical systems and aids for disabled or handicapped persons — Wheelchair tiedown
and occupant-restraint systems — Part 1: Requirements and test methods for all systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 10542-1 and the following apply.
3.1
docking-type tiedown
docking-type securement
method of wheelchair tiedown by which portions of the wheelchair structure, or add-on components fastened
to the wheelchair, align, mate and engage with a docking tiedown device fastened to the vehicle, upon
manoeuvring of the wheelchair into position in the vehicle
NOTE Securement of the wheelchair can occur automatically during wheelchair engagement, or could require
manual intervention through operation of a mechanical lever or electrical switch. Release of the wheelchair will usually
require operation of a mechanical lever or electrical switch.
© ISO 2005 – All rights reserved 1

---------------------- Page: 6 ----------------------
ISO 10542-3:2005(E)
3.2
docking tiedown device
docking securement device
assembly of fixtures and components intended by the manufacturer for installation in motor vehicles for the
purpose of securing a wheelchair by engaging with, and locking onto, securement points on the wheelchair
frame or on wheelchair securement adaptors attached to the wheelchair frame
3.3
powered docking tiedown device
powered docking securement device
docking tiedown device that requires external power to secure and/or release the wheelchair
3.4
universal docking interface geometry
UDIG
specifications for the size, shape, and location of wheelchair securement points, including surrounding clear
zones, intended for use with a variety of docking tiedown devices installed in a wide range of vehicles
3.5
UDIG adaptor
wheelchair tiedown adaptor that conforms to the UDIG specification given in Annex A of this part of
ISO 10542
3.6
wheelchair tiedown adaptor
wheelchair securement adaptor
hardware attached temporarily or permanently to the wheelchair frame to accommodate wheelchair
securement by a wheelchair tiedown device
4 Design requirements and recommendations
4.1 Docking tiedown devices
4.1.1 The design requirements of ISO 10542-1:2001, 4.1, 4.2 and 4.3, shall apply, with the addition that the
docking tiedown device shall
a) provide a rear head restraint if the docking tiedown device includes a back restraint,
b) provide auditory and visual means for indicating to the wheelchair user and vehicle driver when the
wheelchair has been successfully secured or released,
c) include an accessible manual override to release the wheelchair in the event of loss of power to any
power-operated mechanisms,
d) remain in the locked position until manually released, in the event of loss of power to any power-operated
mechanisms,
e) allow for accessible operation of any electrical or mechanical devices necessary for engaging or
disengaging the docking components, and
f) prevent inadvertent release during normal or emergency vehicle operation.
4.1.2 If the docking tiedown device is intended to secure a wide range of wheelchairs in a wide range of
public and private vehicles, it shall be designed to engage effectively with wheelchair securement geometry
specified in Annex A and according to the performance requirements given in Clause 6.
2 © ISO 2005 – All rights reserved

---------------------- Page: 7 ----------------------
ISO 10542-3:2005(E)
4.1.3 The engagement mechanism of the docking tiedown device should operate effectively when the
following misalignment occurs on the approach of a wheelchair to a docking tiedown:
a) the wheelchair is laterally displaced from the mid-line of the docking station up to a maximum of 75 mm in
either direction;
b) the wheelchair reference plane is rotated from the longitudinal centreline of the vehicle up to a maximum
of 10° in either direction;
c) the structural components on the wheelchair that comprise the wheelchair securement points are angled
relative to the vertical up to a maximum of 10° in any direction;
d) the height of any structural components of the wheelchair securement points vary vertically up to a
maximum of 50 mm.
NOTE This is to allow for variation in height due to low tyre pressure or increased load in the wheelchair.
4.2 Wheelchair securement adaptors
4.2.1 Wheelchair securement adaptors shall be designed so that they do not become loose inadvertently
during normal use.
4.2.2 If a wheelchair securement adaptor is intended by the manufacturer to be used for securing a wide
range of wheelchair types in a wide range of public and private vehicles, the structural components that
comprise the wheelchair securement points shall be in accordance with Annex A and the performance
requirements given in Clause 6.
5 Information, identification and instruction
5.1 Identification and labelling
5.1.1 In addition to the requirements of ISO 10542-1:2001, 5.1.1 a) and b), the docking tiedown device and
any replacement parts shall be permanently and legibly labelled to state that the device conforms to this part
of ISO 10542.
5.1.2 A permanent notice shall be provided with the WTORS, indicating the proper use and operation of the
docking tiedown device and the manual override. The notice design (size of lettering, colour and luminance
contrast of the background) should take account of people with reduced vision.
5.2 Instructions for WTORS installers
The requirements of ISO 10542-1:2001, 5.2 apply, with the exception of 5.2.2 c). In addition, the
manufacturer's instructions to the installer of a WTORS with docking-type tiedown device shall include
statements specifying
a) that the WTORS conforms to this part of ISO 10542,
b) the procedure for manoeuvering a wheelchair to achieve effective engagement and disengagement with
the docking tiedown device,
c) recommended locations for electrical switches or other devices intended for use by the wheelchair
occupant or vehicle driver,
d) where to position the docking tiedown device in the vehicle relative to occupant-restraint anchor points for
the most effective use of vehicle-anchored occupant-restraint systems,
© ISO 2005 – All rights reserved 3

---------------------- Page: 8 ----------------------
ISO 10542-3:2005(E)
e) the requirements for electrical wiring and, when appropriate, instructions for connecting to the power
supply of the vehicle,
f) where the fuses or circuit breakers should be mounted to provide for easy access,
g) any required modifications to the vehicle,
h) a warning to consult the vehicle manufacturer before relocating original vehicle equipment,
i) a warning against damaging structural parts of the vehicle during installation of the docking tiedown
device,
j) that the permanent notice provided with the WTORS indicating the proper use and operation of the
docking ti
...