ISO 10542-2:2001

INTERNATIONAL ISO
STANDARD 10542-2
First edition
2001-07-15
Technical systems and aids for disabled or
handicapped persons — Wheelchair
tiedown and occupant-restraint systems —
Part 2:
Four-point strap-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 2: Systèmes de sangles d'attache à quatre points
Reference number
ISO 10542-2:2001(E)
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ISO 10542-2:2001(E)
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ISO 10542-2:2001(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 3.
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 part of ISO 10542 may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 10542-2 was prepared by Technical Committee ISO/TC 173, Technical systems and aids
for disabled or handicapped persons, 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 systems:
— Part 1: Requirements and test methods for all systems
— Part 2: Four-point strap-type tiedown systems
Annexes A and B form a normative part of this part of ISO 10542. Annex C is for information only.
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ISO 10542-2:2001(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 gives
requirements for all wheelchair tiedown and occupant-restraint systems. The provisions of ISO 10542-1 apply except
as amended and supplemented by this part of ISO 10542, which gives particular requirements and test methods for
wheelchair tiedowns and occupant-restraint systems (WTORS) that use four-point, strap-type wheelchair tiedowns.
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INTERNATIONAL STANDARD ISO 10542-2:2001(E)
Technical systems and aids for disabled or handicapped persons —
Wheelchair tiedown and occupant-restraint systems —
Part 2:
Four-point strap-type tiedown systems
1 Scope
This part of ISO 10542 specifies test methods and requirements for design and performance, for instructions and
warnings to installers and users, and for product marking and labelling for wheelchair tiedown and occupant-restraint
systems (WTORS).
It applies only to WTORS that use belt-type occupant restraints and four-point strap-type wheelchair tiedowns that
are intended for adult-occupied wheelchairs used as forward-facing seats by passengers and drivers of motor
vehicles.
This part of ISO 10542 applies primarily to complete WTORS, but other parts of ISO 10542 can also be applied to
components and subassemblies sold separately and as replacement parts.
This part of ISO 10542 applies to WTORS intended for use with all types of manual and powered wheelchairs
intended for use by adults, including three- and four-wheeled scooters.
2 Normative reference
The following normative document contains provisions which, through reference in this text, constitute provisions of
this part of ISO 10542. For dated references, subsequent amendments to, or revisions of, any of these publications
do not apply. However, parties to agreements based on this part of ISO 10542 are encouraged to investigate the
possibility of applying the most recent edition of the normative document indicated below. For undated references,
the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of
currently valid International Standards.
1)
ISO 10542-1:— , 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 part of ISO 10542, the terms and definitions given in ISO 10542-1 apply.
4 Design requirements
The design requirements of ISO 10542-1 apply with the addition of the following.
1) To be published.
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ISO 10542-2:2001(E)
a) Four-point, strap-type tiedowns shall be designed for effective attachment and tensioning on a wide range of
wheelchair types and sizes whilst meeting the angles in Figures 1 and 2, by providing adjustment in strap
assembly length, adjustment in the fore/aft location of vehicle anchor points, or both.
NOTE 1 Figure C.1 shows recommended securement point zones on wheelchairs for which a four-point, strap-type tiedown
system should be effective.
b) All securement-point end fittings of four-point tiedown assemblies shall engage with the securement points of the
surrogate wheelchair shown and specified in Figure E.1 and Figure E.4 of ISO 10542-1:—.
5 Instructions for installers
In addition to the requirements in 5.2 of ISO 10542-1:—, manufacturers' instructions for installers shall include the
recommendations for distances between anchor points of wheelchair tiedowns and the information illustrated in
Figures 1 and 2 indicating that:
� �
a) the side-view projected angle for the rear tiedown straps is between 30 and 45 from the horizontal,
� �
b) the side-view projected angle for the front tiedown straps is between 40 and 60 ,
�
c) the rear-view projected angle of the rear tiedown straps is within 10 of the wheelchair reference plane, and
�
d) the front-view-projected angle of the front tiedown straps is within 25 of the wheelchair reference plane, but
angled so as to provide some lateral stability to the wheelchair.
Dimensions in millimetres
Key
1 Rear securement points
NOTE The angles shown are obtained by projecting the angle of each tiedown strap onto a vertical plane parallel to (side view)
or perpendicular to (rear view) the wheelchair reference plane.
a
Wheelchair reference plane
Figure 1 — Preferred angles of rear wheelchair-tiedown straps and locations of tiedown anchor points
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ISO 10542-2:2001(E)
Dimensions in millimetres
Key
1 Front securement points
NOTE The angles shown are obtained by projecting the angle of each tiedown strap onto a vertical plane parallel to (side view)
or perpendicular to (rear view) the wheelchair reference plane.
a
Wheelchair reference plane
Figure 2 — Preferred angles of front tiedown straps and locations of tiedown anchor points
6 User and maintenance instructions
In addition to the requirements in 5.3 of ISO 10542-1:—, manufacturers' instructions for users shall include
recommendations for preferred angles of tiedown strap assemblies and Figures 1 and 2, including statements that,
whenever possible,
� �
a) the side-view projected angle for the rear tiedown straps s
...