ISO 13216-3:2018

INTERNATIONAL ISO
STANDARD 13216-3
Second edition
2018-10
Road vehicles — Anchorages
in vehicles and attachments to
anchorages for child restraint
systems —
Part 3:
Classification of child restraint system
and space in vehicle
Véhicules routiers — Ancrages dans les véhicules et attaches aux
ancrages pour systèmes de retenue pour enfants —
Partie 3: Classification des dimensions des retenues pour enfants et
espace dans le véhicule
Reference number
©
ISO 2018
© ISO 2018
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ii © ISO 2018 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Vehicle space requirements . 2
4.1 Space required in a vehicle to accommodate specified types and installation
modes of child restraint systems. 2
4.1.1 General. 2
4.1.2 Mass of CRF . 2
4.1.3 Installation and assessment using virtual tools and procedures . . 3
4.2 Space required for full-height forward-facing toddler child restraint systems . 3
4.3 Space required for reduced-height forward-facing toddler child restraint systems . 3
4.4 Space required for reduced-height forward-facing toddler child restraint systems
having a reduced contour in the upper part, and an extended seatback upper part . 3
4.5 Space required for full-size rearward-facing toddler child restraint systems . 6
4.6 Space required for reduced-size rearward-facing toddler child restraint systems . 7
4.7 Space required for rearward-facing infant child restraint systems . 7
4.8 Space required for lateral-facing infant child restraint system (carry-cot) . 7
4.9 Space required for booster seat and booster cushion.13
4.9.1 Purpose of the booster system envelopes for determination of space and
seat belt alignment in vehicles .13
4.9.2 Installation requirements .13
4.9.3 Belt routing requirements .13
4.9.4 Installation with ISOFIX support .13
4.9.5 Installation without ISOFIX support .14
5 Dimensions of child restraint system .18
5.1 Maximum dimensions of child restraint systems .18
5.2 Full-height forward-facing toddler child restraint system .18
5.3 Reduced-height forward-facing toddler child restraint system .18
5.4 Reduced-height forward-facing toddler child restraint systems with a reduced
contour in the upper part, and an extended seatback upper part .19
5.5 Full-size rearward-facing toddler child restraint system.19
5.6 Reduced-size rearward-facing toddler child restraint system .19
5.7 Rearward-facing infant child restraint systems .19
5.8 Lateral-facing infant child restraint systems .19
5.9 Booster seat and booster cushion restraint systems .19
5.9.1 Purpose of the booster system envelopes with regard to child restraint
systems .19
5.9.2 Maximum dimensional requirements .19
5.9.3 Booster with ISOFIX additional requirements .20
5.10 Procedure for checking CRS compliance with CRF .20
5.11 Installation and assessment using virtual tools and procedures .20
6 Classification system .20
Annex A (informative) Marking of vehicle seating positions and child restraint systems .22
Annex B (informative) Drawings and tools .24
Bibliography .25
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 documents 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).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
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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 the following
URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 36.
This second edition cancels and replaces the first edition (ISO 13216-3:2006), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— Addition of booster system envelopes ISO/B3, ISO/B2 and ISO/B1;
— Addition of envelope ISO/R2X (modified version of ISO/R2 to provide improved compatibility with
the vehicle interior);
— Improved version of the lateral facing envelope (ISO/L1 and ISO/L2);
— Dashed line in seatback area of the ISO/R series of envelopes;
— Corrections in the following envelope drawings: Figures 3, 5 and 7; and
— Addition of recommended CRF masses (Table 1).
A list of all parts in the ISO 13216 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2018 – All rights reserved

Introduction
The basic ISOFIX standard ISO 13216-1 provides requirements needed for positioning of the seat bight
anchorages, the geometry around anchorage points and, to some extent, dimensional requirements for
forward-facing child restraint systems.
In order to ensure that a child restraint system fits in a vehicle, it is also essential that the vehicle interior
and the child restraint system match each other spatially. This document provides requirements for the
space needed in vehicles to accommodate child restraints of different types and sizes.
Not all vehicles on the market are capable of accommodating the largest child restraint systems.
This document thus provides a classification system to help in judging which types and sizes of child
restraint systems will fit in the vehicle. Three size classes of forward-facing systems and three size
classes of rearward-facing systems are provided. Two classes of lateral-facing systems are included
(dimensionally revised in this second edition). This second edition also incorporates booster system
envelopes for size classification of booster systems.
A suggested marking of the space available for the respective child restraint positions in the vehicle,
and for the child restraint system dimensions, is included in this document to help consumers choose
a child restraint system that is dimensionally suitable for their vehicle. This information is shown in
informative Annex A.
INTERNATIONAL STANDARD ISO 13216-3:2018(E)
Road vehicles — Anchorages in vehicles and attachments
to anchorages for child restraint systems —
Part 3:
Classification of child restraint system and space in vehicle
1 Scope
This document classifies the spatial requirements in a vehicle to enable a child restraint system (CRS)
to be conveniently mounted. It also specifies the dimensions of child restraint systems, to ensure that
they will fit in vehicles.
A classification scheme is provided to determine dimensional compatibility between child restraint
systems and the available space at specified seating positions in vehicles. The dimensional requirements
refer to forward-facing child restraint systems of three size categories, rearward-facing child restraint
systems of three size categories, and lateral-facing child restraint systems of two categories. This
edition of the document also incorporates size classification of booster systems.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 13216-1:1999, Road vehicles — Anchorages in vehicles and attachments to anchorages for child
restraint systems — Part 1: Seat bight anchorages and attachments
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 13216-1 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http: //www .electropedia .org/
— ISO Online browsing platform: available at https: //www .iso .org/obp
3.
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