Regulation No. 17-07

Name:Regulation No. 17-07
Description:Seat Anchorages and Head Restraints.
Official Title:Uniform Provisions Concerning the Approval of: Vehicles with Regard to the Seats, their Anchorages and Any Head Restraints.
Country:ECE - United Nations
Date of Issue:1970-08-14
Amendment Level:07 Series, Supplement 3
Number of Pages:48
Vehicle Types:Bus, Car, Component, Heavy Truck, Light Truck
Subject Categories:Prior Versions
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Keywords:

head, seat, seats, vehicle, regulation, position, test, paragraph, restraint, approval, restraints, point, annex, fitted, type, machine, seat-back, reference, requirements, case, parts, plane, angle, line, manufacturer, torso, means, seating, systems, amendments, system, area, vertical, series, longitudinal, adjustment, rear, defined, displacement, front, height, forward, capable, adjustable, vehicles, anchorages, positions, locking, tests, paragraphs

Text Extract:

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E/ECE/324 )
E/ECE/TRANS/505 ) Rev.1/Add.16/Rev.4/Amend.1
August 6, 2007
STATUS OF UNITED NATIONS REGULATION
ECE 17
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
VEHICLES WITH REGARD TO THE SEATS, THEIR ANCHORAGES AND ANY HEAD
RESTRAINTS
Incorporating:
04 series of amendments
Date of Entry into Force: 28.01.90
Supplement 1 to the 04 series of amendments
Date of Entry into Force: 26.01.94
05 series of amendments
Date of Entry into Force: 26.12.96
06 series of amendments
Date of Entry into Force: 18.01.98
07 series of amendments
Date of Entry into Force: 06.08.98
Supplement 1 to the 07 series of amendments
Date of Entry into Force: 17.11.99
Supplement 2 to the 07 series of amendments
Date of Entry into Force: 13.01.00
Corr. 1 to the 06 series of amendments
Dated: 10.03.99
Corr. 1 to the 07 series of amendments
Dated: 08.03.00
Corr. 1 to Supplement 1 to the 07 series of amendments
Dated: 27.06.01
Corr. 1 to Revision 4 to the 07 series of amendments
Dated: 12.11.03
Corr. 2 to Revision 4 to the 07 series of amendments
Dated: 23.06.04
Supplement 3 to the 07 series of amendments
Date of Entry into Force: 11.06.07

REGULATION NO. 17
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF VEHICLES WITH REGARD TO THE
SEATS, THEIR ANCHORAGES AND ANY HEAD RESTRAINTS
REGULATION
CONTENTS
1.
Scope
2.
Definitions
3.
Application for Approval
4.
Approval
5.
Requirements
6.
Tests
7.
Conformity of Production
8.
Penalties for Non-Conformity of Production
9.
Modifications of the Vehicle Type and Extension of Approval with Respect to the Seats, their
Anchorages and/or their Head Restraints
10.
Production Definitely Discontinued
11.
Instruction for use
12.
Names and Addresses of Technical Services Responsible for Conducting Approval Test, and of
Administrative Departments
13.
Transitional Provisions
ANNEXES
Annex 1
Annex 2
Annex 3
Annex 4
Annex 5
Annex 6
Annex 7
Annex 8
Annex 9
Communication Concerning the Approval or Refusal or Extension or Withdrawal of
Approval or Production Definitely Discontinued of a Vehicle Type with Regard to the
Strength of the Seats and their Anchorages, in the Case Either of Seats Fitted or
Capable of being Fitted with Head Restraints, or of Seats not Capable of Being Fitted
with Such Devices and the Characteristics of Head Restraints Pursuant to
Regulation No. 17
Arrangements of Approval Marks
Procedure for Determining the 'H' Point and the Actual Torso Angle for Seating Positions
in Motor Vehicles
Determination of the Height and Width of Head Restraints
Details of Lines and Measurements Taken During Tests
Test Procedure for Checking Energy Dissipation
Method for Testing the Strength of Seat Anchorages and their Adjustment, Locking and
Displacement Systems
Determination of Dimension "a" of Head Restraint Gaps
Test Procedure for Devices Intended to Protect the Occupants against Displacement of
Luggage.

2.3. "Seat" means a structure which may or may not be integral with the vehicle structure
complete with trim, intended to seat one adult person. The term covers both an individual
seat or part of a bench seat intended to seat one person;
2.4. "Bench seat" means a structure complete with trim, intended to seat more than one adult
person;
2.5. "Anchorage" means the system by which the seat assembly is secured to the vehicle
structure, including the affected parts of the vehicle structure;
2.6. "Adjustment system" means the device by which the seat or its parts can be adjusted to a
position suited to the morphology of the seated occupant. This device may, in particular,
permit:
2.6.1. longitudinal displacement;
2.6.2. vertical displacement;
2.6.3. angular displacement;
2.7. "Displacement system" means a device by which the seat or one of its parts can be
displaced and/or rotated, without a fixed intermediate position, to permit easy access of
occupants to the space behind the seat concerned;
2.8. "Locking system" means a device ensuring that the seat and its parts are maintained in
the position of use;
2.9. "Folding seat" means an auxiliary seat intended for occasional use and normally folded;
2.10. "Transverse plane" means a vertical plane perpendicular to the median longitudinal plane
of the vehicle;
2.11. "Longitudinal plane" means a plane parallel to the median longitudinal plane of the
vehicle;
2.12. "Head restraint" means a device whose purpose is to limit the rearward displacement of an
adult occupant's head in relation to his torso in order to reduce the danger of injury to the
cervical vertebrae in the event of an accident;
2.12.1. "Integrated head restraint" means a head restraint formed by the upper part of the
seat-back. Head restraints meeting the definitions of Paragraphs 2.12.2. or 2.12.3. below
but which can only be detached from the seat or the vehicle structure by the use of tools or
by partial or complete removal of the seat covering, meet the present definition;
2.12.2. "Detachable head restraint" means a head restraint consisting of a component separable
from the seat designed for insertion and positive retention in the seat-back structure;
2.12.3. "Separate head restraint" means a head restraint consisting of a component separate
from the seat, designed for insertion and/or positive retention in the structure of the vehicle;
2.13. "R point" means the seating reference point as defined in Annex 3 to this Regulation;
2.14. "Reference line" means the line on the manikin reproduced in Annex 3, Appendix 1,
Figure 1, to this Regulation.

3.3.3.2. In the case of separate head restraints: an additional set of the seats with which the vehicle
is equipped, with their anchorages, an additional set of the corresponding head restraints
and the part of the vehicle structure to which the head restraint in fitted, or a complete
structure.
4. APPROVAL
4.1. If the vehicle submitted for approval pursuant to this Regulation meets the relevant
requirements (seats fitted with head restraints or capable of being fitted with head
restraints), approval of the vehicle type shall be granted.
4.2. An approval number shall be assigned to each type approved. Its first two digits (at
present 07, corresponding to the 07 series of amendments) shall indicate the series of
amendments incorporating the most recent major technical amendments made to the
Regulation at the time of issue of the approval. The same Contracting Party may not assign
the same number either to the same vehicle type equipped with other types of seats or head
restraints or with seats anchored differently on the vehicle (this applies both to seats with
and to those without head restraints) or to another vehicle type.
4.3. Notice of approval or extension or refusal of approval of a vehicle type pursuant to this
Regulation shall be communicated to the Parties to the Agreement applying this Regulation
by means of a form conforming to the model in Annex 1 to this Regulation.
4.4. There shall be affixed, conspicuously and in a readily accessible place specified on the
approval form, to every vehicle conforming to a vehicle type approved under this Regulation,
an international approval mark consisting of:
4.4.1. a circle surrounding the Letter "E" followed by the distinguishing number of the country
which has granted approval;
4.4.2. the number of this Regulation, followed by the Letter "R", a dash and the approval number,
to the right of the circle prescribed in Paragraph 4.4.1.
4.4.3. However, if the vehicle is equipped with one or more seats fitted or capable of being fitted
with head restraints, approved as meeting the requirements under Paragraphs 5.1. and
5.2. below, the number of this Regulation shall be followed by the Letters "RA". The form
conforming to the model in Annex 1 to this Regulation shall indicate which seat(s) of the
vehicle is (are) fitted or capable of being fitted with head restraints. The marking shall also
indicate that any remaining seats in the vehicle, not fitted or capable of being fitted with
head restraints, are approved and meet the requirements of Paragraph 5.1. below of this
Regulation.

5.1.4. The surface of the rear parts of seats shall exhibit no dangerous roughness or sharp edges
likely to increase the risk of severity of injury to the occupants. This requirement is
considered as satisfied if the surface of the rear parts of seats tested in the conditions
specified in Paragraph 6.1. exhibit radii of curvature not less than:
2.5 mm in Area 1,
5.0 mm in Area 2,
3.2 mm in Area 3.
These areas are defined in Paragraph 6.8.1.
5.1.4.1. This requirement does not apply to:
5.1.4.1.1. the parts of the different areas exhibiting a projection of less than 3.2 mm from the
surrounding surface, which shall exhibit blunted edges, provided that the height of the
projection is not more than half its width;
5.1.4.1.2. Rearmost seats, to back-to-back seats or to seats that comply with the provisions of
Regulation No. 21 "Uniform Provisions concerning the Approval of Vehicles with regard to
their Interior Fittings" (E/ECE/324-E/ECE/TRANS/505/Rev.1/Add.20/Rev.2, as last
amended);
5.1.4.1.3. Rear parts of seats situated below a horizontal plane passing through the lowest R point in
each row of seats. (Where rows of seats have different heights, starting from the rear, the
plane shall be turned up or down forming a vertical step passing through the R point of the
row of seats immediately in front);
5.1.4.1.4. parts such as "flexible wire mesh".
5.1.4.2. In Area 2, defined in Paragraph 6.8.1.2., surfaces may exhibit radii less than 5 mm, but not
less than 2.5 mm provided that they pass the energy-dissipation test prescribed in Annex 6
to this Regulation. Moreover, these surfaces must be padded to avoid direct contact of the
head with the seat frame structure.
5.1.4.3. If the areas defined above contain parts covered with material softer than 50 Shore A
hardness, the above requirements, with the exception of those relating to the
energy-dissipation test in accordance with the requirements of Annex 6, shall apply only to
the rigid parts.
5.1.5. No failure shall be shown in the seat frame or in the seat anchorage, the adjustment and
displacement systems or their locking devices during or after the tests prescribed in
Paragraphs 6.2 and 6.3. Permanent deformations, including ruptures, may be accepted,
provided that these do not increase the risk of injury in the event of a collision and the
prescribed loads were sustained.
5.1.6. No release of the locking systems shall occur during the tests described in Paragraph 6.3.
and in Annex 9, Paragraph 2.1.
5.1.7. After the tests, the displacement systems intended for permitting or facilitating the access of
occupants must be in working order; they must be capable, at least once, of being unlocked
and must permit the displacement of the seat or the part of the seat for which they are
intended.
Any other displacement systems, as well as adjustment systems and their locking systems

5.4.5. The head restraint shall be secured to the seat or to the vehicle structure in such a way that
no rigid and dangerous parts project from the padding of the head restraint or from its
attachment to the seat-back as a result of the pressure exerted by the headform during the
test.
5.4.6. In the case of a seat fitted with a head restraint, the provisions of Paragraph 5.1.3. may,
after agreement of the technical service, be considered to be met if the seat fitted with its
head restraint complies with the provisions of Paragraph 5.4.2. above.
5.5. Height of Head Restraints.
5.5.1. The height of head restraints shall be measured as described in Paragraph 6.5. below.
5.5.2. For head restraints not adjustable for height, the height shall be not less than 800 mm in the
case of front seats and 750 mm in the case of other seats.
5.5.3. For Head Restraints Adjustable For Height:
5.5.3.1. the height shall be not less than 800 mm in the case of front seats and 750 mm in the case
of other seats; this value shall be obtained in a position between the highest and lowest
positions to which adjustment is possible;
5.5.3.2. there shall be no "use position" resulting in a height of less than 750 mm;
5.5.3.3. in the case of seats other than the front seats the head restraints may be such that they can
be displaced to a position resulting in a height of less than 750 mm, provided that such
position is clearly recognisable to the occupant as not being included for the use of the head
restraint;
5.5.3.4. in the case of front seats head restraints may be such that they can be automatically
displaced when the seat is not occupied, to a position resulting in a height of 750 mm,
provided that they automatically return to the position of use when the seat is occupied.
5.5.4. The dimensions mentioned in Paragraphs 5.5.2. and 5.5.3.1. above may be less than
800 mm in the case of front seats and 750 mm in the case of other seats to leave adequate
clearance between the head restraint and the interior surface of the roof, the windows or
any part of the vehicle structure; however, the clearance shall not exceed 25 mm. In the
case of seats fitted with displacement and/or adjustment systems, this shall apply to all seat
positions. Furthermore, by derogation to Paragraph 5.5.3.2. above, there shall not be any
"use position" resulting in a height lower than 700 mm.
5.5.5. By derogation to the height requirements mentioned in Paragraphs 5.5.2. and 5.5.3.1.
above, the height of any head restraint designed to be provided in rear centre seats or
seating positions shall be not less than 700 mm.
5.6. In the case of a seat capable of being fitted with a head restraint, the provisions of
Paragraphs 5.1.3. and 5.4.2. above shall be verified.
5.6.1. The height of the part of the device on which the head restraints, measured as described in
Paragraph 6.5. below, shall in the case of a head restraint adjustable for height be not less
than 100 mm.

5.15. Special Requirements Regarding the Protection of Occupants from Displaced
Luggage
5.15.1. Seat-backs
Seat-backs and/or head restraints located such that they constitute the forward boundary of
the luggage compartment, all seats being in place and in the normal position of use as
indicated by the manufacturer, shall have sufficient strength to protect the occupants from
displaced luggage in a frontal impact. This requirement is deemed to be met if, during and
after the test described in Annex 9, the seat-backs remain in position and the locking
mechanisms remain in place. However, the deformation of the seat-backs and their
fastenings during the test is permitted, provided that the forward contour of the parts of the
tested seat-back and/or head restraint, that are harder than 50 shore A, does not move
forward of a transverse vertical plane which passes through:
(a)
(b)
a point of 150 mm forward of the R point of the seat in question, for the parts of the
head restraint;
a point of 100 mm forward of the R point of the seat in question, for parts of the
seat-back;
excluding the rebound phases of the test blocks.
For integrated head restraints, the limit between the head restraint and the seat-back is
defined by the plane perpendicular to the reference line 540 mm from the R point.
All measurements shall be taken in the longitudinal median plane of the corresponding seat
or seating position for each seating position constituting the forward boundary of the
luggage compartment.
During the test described in Annex 9, the test blocks shall remain behind the seat-back(s) in
question.
5.15.2. Partitioning Systems.
At the request of the vehicle manufacturer, the test described in Annex 9 may be carried out
with the partitioning systems in place, if these systems are fitted as standard equipment for
the particular type of vehicle.
Partitioning systems, netting wire mesh located above the seat-backs in their normal
position of use, shall be tested according to Paragraph 2.2. of Annex 9.
This requirement is deemed to be met if, during the test, the partitioning systems remain in
position. However, the deformation of the partitioning systems during the test is permitted,
provided that the forward contour of the partitioning (including parts of the tested
seat-back(s) and/or head restraint(s)) that are harder than 50 Shore A does not move
forward of a transverse vertical plane which passes through:
(a)
(b)
a point of 150 mm forward of the R point of the seat in question for parts of the head
restraint;
a point of 100 mm forward of the R point of the seat in question, for parts of the
seat-back and part of the partitioning system other than the head restraint.

6.3.3. The requirements of Paragraphs 6.3.1. and 6.3.2. above shall be verified for all positions of
the seat. In the case of seats fitted with an adjustable head restraint, the test shall be
conducted with the head restraints placed in the most unfavourable position (generally the
highest position) allowed by its adjusting system. During the test the seat shall be so
positioned that no external factor shall prevent the release of the locking systems.
These conditions shall be considered to be met if the seat is tested after being adjusted in
the following positions:
The longitudinal adjustment is fixed one notch or 10 mm rearward of the most forward
normal driving position or position of use as indicated by the manufacturer (for seats with
independent vertical adjustment, the cushion shall be placed in its highest position);
The longitudinal adjustment is fixed one notch or 10 mm forward of the most rearward
normal driving position or position of use as indicated by the manufacturer (for seats with
independent vertical adjustment, the cushion shall be placed in its lowest position), and,
where appropriate, in accordance with the requirements of Paragraph 6.3.4. below.
6.3.4. In cases where the arrangement of the locking systems is such that, in a seat position other
than those defined in Paragraph 6.3.3. above, the distribution of the forces on the locking
devices and seat anchorages would be less favourable than with either configuration
defined in Paragraph 6.3.3., the tests shall be conducted for that less favourable seating
position.
6.3.5. The test conditions of Paragraph 6.3.1. shall be considered to be satisfied if, at the request
of the manufacturer, they are replaced by a collision test of the complete vehicle in running
order against a rigid barrier as laid down in Paragraph 2 of Annex 7 to this Regulation. In
this case, the seat shall be adjusted for the least favourable conditions of distribution of
stresses in the anchorage system as provided for in Paragraphs 6.1.1, 6.3.3. and
6.3.4. above.
6.4. Test of the Performance of the Head Restraint
6.4.1. If the head restraint is adjustable, it shall be placed in the most unfavourable position
(generally the highest position) allowed by its adjustment system.
6.4.2. In the case of a bench seat, where part or all of the supporting frame (including that of the
head restraints) is common to more than one seating position, the test shall be conducted
simultaneously for all those seating positions.
6.4.3. Test
6.4.3.1. All lines including the projections of the reference line, shall be drawn in the vertical median
plane of the seat or seating position concerned (see Annex 5 to this Regulation).
6.4.3.2. The displaced reference line is determined by applying to the part simulating the back of the
manikin referred to in Annex 3 to this Regulation an initial force producing a rearward
moment of 37.3 daNm about the R point.

6.6.2. The width of the head restraint to be taken into consideration in implementing the
requirements of Paragraph 5.10. above, is the distance "L" measured in the Plane S
between the vertical longitudinal Planes P and P'.
6.6.3. The width of the head restraint shall if necessary also be determined in the plane
perpendicular to the reference line 635 mm above the R point of the seat, this distance
being measured along the reference line.
6.7. Determination of Distance "a" of Head Restraint Gaps (see Annex 8 to this
Regulation)
6.7.1. The distance "a" shall be determined for each gap and in relation to the front face of the
head restraint, by means of a sphere having a diameter of 165 mm.
6.7.2. The sphere shall be put into contact with the gap in a point of the gap area which allows the
maximum sphere intrusion, considering no load is to be applied;
6.7.3. The distance between the two points of contact of the sphere with the gap will constitute the
distance "a" to be considered for the evaluation of the provisions under Paragraphs 5.8. and
5.9. above.
6.8. Tests for Checking Energy Dissipation on the Seat-Back and Head Restraint
6.8.1. The surfaces of the rear parts of seats to be checked are those situated in the areas defined
below which can be contacted by a 165 mm diameter sphere when the seat is mounted in
the vehicle.
6.8.1.1. Area 1
6.8.1.1.1. In the case of separate seats without head restraints, this area shall include the rear part of
the seat-back between the longitudinal vertical planes situated at 100 mm on either side of
the longitudinal median plane of the seat centre line, and above a plane perpendicular to the
reference line 100 mm below the top of the seat-back.
6.8.1.1.2. In the case of bench seats without head restraints, this area shall extend between the
longitudinal vertical planes situated at 100 mm on either side of the longitudinal median
plane of each designated outboard seating position defined by the manufacturer and above
a plane perpendicular to the reference line 100 mm below the top of the seat-back.
6.8.1.1.3. In the case of seats or bench seats with head restraints, this area shall extend between the
longitudinal vertical planes, on either side of and 70 mm from the longitudinal median plane
of the seat or of the seating position concerned and situated above the plane perpendicular
to the reference line 635 mm from the R point. For the test, the head restraint, if adjustable
shall be placed in the most unfavourable position (generally the highest) permitted by its
adjustment system.
6.8.1.2. Area 2
6.8.1.2.1. In the case of seats or bench seats without head restraints and seats or bench seats with
detachable or separate head restraints, Area 2 shall extend above a plane perpendicular to
the reference line 100 mm distant from the top of the seat-back, other than parts of Area 1.
6.8.1.2.2. In the case of seats or bench seats with integrated head restraints, Area 2 shall extend
above a plane perpendicular to the reference line 440 mm distant from the R point of the

9.2. Confirmation or refusal of approval, specifying the modifications, shall be communicated to
the Parties to the Agreement applying this Regulation by means of the procedure laid down
in Paragraph 4.3. above.
9.3. The competent authority issuing the extension of approval shall assign a series number for
such an extension and inform thereof the other Parties to the 1958 Agreement applying this
Regulation by means of the communication form conforming to the model in Annex 1 to this
Regulation.
10. PRODUCTION DEFINITELY DISCONTINUED
10.1. If the holder of the approval completely ceases to manufacture a device approved in
accordance with this Regulation, he shall so inform the authority which granted the
approval. Upon receiving the relevant communication that authority shall inform thereof the
other Parties to the 1958 Agreement applying this Regulation by means of a communication
form conforming to the model in Annex 1 to this Regulation.
11. INSTRUCTIONS FOR USE
11.1. For seats fitted with adjustable head restraints, the manufacturers shall provide instructions
on how to operate, adjust, lock and, where applicable remove the head restraints.
12. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR
CONDUCTING APPROVAL TESTS AND OF ADMINISTRATIVE DEPARTMENTS
The Parties to the Agreement applying this Regulation shall communicate to the United
Nations Secretariat the names and addresses of the technical services responsible for
conducting approval tests and of the administrative departments which grant approval and
to which forms certifying approval or extension or refusal or withdrawal of approval, issued
in other countries, are to be sent.
13. TRANSITIONAL PROVISIONS
13.1. As from the official date of entry into force of the 06 series of amendments, no Contracting
Party applying this Regulation shall refuse to grant ECE approvals under this Regulation as
amended by the 06 series of amendments.
13.2. As from October 1, 1999, Contracting Parties applying this Regulation shall grant
ECE approvals only if the requirements of this Regulation, as amended by the 06 series of
amendments, are satisfied.
13.3. As from October 1, 2001, Contracting Parties applying this Regulation may refuse to
recognise approvals which were not granted in accordance with the 06 series of
amendments to this Regulation.
13.4. As from the official date of entry into force of the 07 series of amendments, no Contracting
Party applying this Regulation shall refuse to grant ECE approvals under this Regulation as
amended by the 07 series of amendments.

ANNEX 1
COMMUNICATION
(Maximum format : A4 (210 x 297 mm))
issued by:
Name of administration:
.....................................
.....................................
.....................................
Concerning
APPROVAL GRANTED
APPROVAL EXTENDED
APPROVAL REFUSED
APPROVAL WITHDRAWN
PRODUCTION DEFINITELY DISCONTINUED
of a vehicle type with regard to the strength of the seats and their anchorages, in the case either of seats
fitted or capable of being fitted with head restraints or of seats not capable of being fitted with such
devices and the characteristics of head restraints pursuant to Regulation No. 17
Approval No......................................... Extension No. ................................
1. Trade name or mark of the motor vehicle..............................................................................................
2. Vehicle type ...........................................................................................................................................
3. Manufacturer's name and address ........................................................................................................
4. If applicable, name and address of the manufacturer's representative.................................................
...............................................................................................................................................................
5. Description of seats ...............................................................................................................................
6. Number of seats fitted or capable of being fitted with head restraints, adjustable or not adjustable
...............................................................................................................................................................
7. Description of the adjustment, displacement and locking systems of the seat or of its parts and a
description of occupant protection system against displacement of luggage .......................................
8. Description of seat anchorage...............................................................................................................
9. Longitudinal position of the seats during the tests.................................................................................

ANNEX 2
ARRANGEMENTS OF APPROVAL MARKS
MODEL A
(See Paragraphs 4.4, 4.4.1, 4.4.2 and 4.4.3 of this Regulation)
Vehicle with at Least One Seat Fitted or Capable of Being Fitted with a Head Restraint
a = 8 mm min.
The above approval mark when affixed to a vehicle shows that the vehicle type concerned, with regard to
the strength of the seats fitted or capable of being fitted with head restraints and with regard to
characteristics of the head restraints, has been approved in the Netherlands (E4) pursuant to
Regulation No. 17, under the Approval Number 072439. The first two digits of the approval number
indicate that the Regulation already contained the 07 series of amendments at the time of approval. The
above approval mark also shows that the vehicle type was approved pursuant to Regulation No. 17 with
regard to the strength of any seats on the vehicle which are not fitted or capable of being fitted with head
restraints.

MODEL C
(See Paragraph 4.5 of this Regulation)
Vehicle with at Least One Seat Fitted or Capable of Being Fitted with a Head Restraint
a = 8 mm min.
The above approval mark when affixed to a vehicle shows that the vehicle type has at last one seat fitted
or capable of being fitted with a head restraint, and was approved in the Netherlands (E4) pursuant to
Regulations Nos. 17 and 33.
The approval numbers indicate that, on the dates when approval was granted, Regulation No. 17
included the 07 series of amendments but Regulation No. 33 was still in its original form. The above
approval mark also shows that the vehicle type was approved pursuant to Regulation No. 17 with regard
to the strength of any seats on the vehicle which are not fitted or capable of being fitted with head
restraints.

ANNEX 3
PROCEDURE FOR DETERMINING THE "H" POINT AND THE ACTUAL TORSO ANGLE FOR
SEATING POSITIONS IN MOTOR VEHICLES
1. PURPOSE
The procedure described in this Annex is used to establish the "H" point location and the
actual torso angle for one or several seating positions in a motor vehicle and to verify the
relationship of measured data to design specifications given by the vehicle manufacturer.
2. DEFINITIONS
For the purposes of this Annex:
2.1. "Reference data" means one or several of the following characteristics of a seating
position:
2.1.1. the "H" point and the "R" point and their relationship,
2.1.2. the actual torso angle and the design torso angle and their relationship.
2.2. "Three-dimensional 'H' point machine" (3-D H machine) means the device used for the
determination of "H" points and actual torso angles. This device is described in Appendix 1
to this Annex;
2.3. "'H' point" means the pivot centre of the torso and thigh of the 3-D H machine installed in
the vehicle seat in accordance with Paragraph 4 below. The "H" point is located in the
centre of the centreline of the device which is between the "H" point sight buttons on either
side of the 3-D H machine. The "H" point corresponds theoretically to the "R" point (for
tolerances see Paragraph 3.2.2. below). Once determined in accordance with the
procedure described in Paragraph 4, the "H" point is considered fixed in relation to the
seat-cushion structure and to move with it when the seat is adjusted;
2.4. "'R' point", or "seating reference point" means a design point defined by the vehicle
manufacturer for each seating position and established with respect to the
three-dimensional reference system;
2.5. "Torso-line" means the centreline of the probe of the 3-D H machine with the probe in the
fully rearward position;
2.6. "Actual torso angle" means the angle measured between a vertical line through the
"H" point and the torso line using the back angle quadrant on the 3-D H machine. The
actual torso angle corresponds theoretically to the design torso angle (for tolerances see
Paragraph 3.2.2. below);
2.7. "Design torso angle" means the angle measured between a vertical line through the
"R" point and the torso line in a position which corresponds to the design position of the
seat-back establish by the vehicle manufacturer;

3.2.5. If the results of at least two of the three operations described in Paragraph 3.2.4. above do
not satisfy the requirements of Paragraph 3.2.2. above, or if the verification cannot take
place because the vehicle manufacturer has failed to supply information regarding the
position of the "R" point or regarding the design torso angle, the centroid of the three
measured points or the average of the three measured angles shall be used and be
regarded as applicable in all cases where the "R" point or the design torso angle is referred
to in this Regulation.
4. PROCEDURE FOR "H" POINT AND ACTUAL TORSO ANGLE DETERMINATION
4.1. The vehicle shall be preconditioned at the manufacturer's discretion, at a temperature of
20 ± 10° C to ensure that the seat material reached room temperature. If the seat to be
checked has never been sat upon, a 70 to 80 kg person or device shall sit on the seat twice
for one minute to flex the cushion and back. At the manufacturer's request, all seat
assemblies shall remain unloaded for a minimum period of 30 minutes prior to installation of
the 3-D H machine.
4.2. The vehicle shall be at the measuring attitude defined in Paragraph 2.11. above.
4.3. The seat, if it is adjustable, shall be adjusted first to the rearmost normal driving or riding
position, as indicated by the vehicle manufacturer, taking into consideration only the
longitudinal adjustment of the seat, excluding seat travel used for purposes other than
normal driving or riding positions. Where other modes of seat adjustment exist (vertical,
angular, seat-back, etc.) these will be then adjusted to the position specified by the vehicle
manufacturer. For suspension seats, the vertical position shall be rigidly fixed
corresponding to a normal driving position as specified by the manufacturer.
4.4. The area of the seating position contacted by the 3-D H machine shall be covered by a
muslin cotton, of sufficient size and appropriate texture, described as a plain cotton fabric
having 18.9 threads per cm and weighing 0.228 kg/m or knitted or non-woven fabric
having equivalent characteristics.
If the test is run on a seat outside the vehicle, the floor on which the seat is placed shall
have the same essential characteristics as the floor of the vehicle in which the seat is
intended to be used.
4.5. Place the seat and back assembly of the 3-D H machine so that the centreplane of the
occupant (C/LO) coincides with the centreplane of the 3-D H machine. At the
manufacturer's request, the 3-D H machine may be moved inboard with respect to the C/LO
if the 3-D H machine is located so far outboard that the seat edge will not permit levelling of
the 3-D H machine.
4.6. Attach the foot and lower leg assemblies to the seat pan assembly, either individually or by
using the T-bar and lower leg assembly. A line through the "H" point sight buttons shall be
parallel to the ground and perpendicular to the longitudinal centreplane of the seat.

4.12. Tilt the back pan forward to release the tension on the seat-back. Rock the 3-D H machine
from side to side through 10° arc (5° to each side of the vertical centreplane) for three
complete cycles to release any accumulated friction between the 3-D H machine and the
seat.
During the rocking action, the T-bar of the 3-D H machine may tend to diverge from the
specified horizontal and vertical alignment. The T-bar must therefore be restrained by
applying an appropriate lateral load during the rocking motions. Care shall be exercised in
holding the T-bar and rocking the 3-D H machine to ensure that no inadvertent exterior
loads are applied in a vertical or fore and aft direction.
The feet of the 3-D H machine are not to be restrained or held during this step. If the feet
change position, they should be allowed to remain in that attitude for the moment.
Carefully return the back pan to the seat-back and check the two spirit levels for zero
position. If any movement of the feet has occurred during the rocking operation of the
3-D H machine, they must be repositioned as follows:
Alternately, lift each foot off the floor the minimum necessary amount until no additional foot
movement is obtained. During this lifting, the feet are to be free to rotate; and no forward or
lateral loads are to be applied. When each foot is placed back in the down position, the heel
is to be in contact with the structure designed for this.
Check the lateral spirit level for zero position; if necessary, apply a lateral load to the top of
the back pan sufficient to level the 3-D H machine's seat pan on the seat.
4.13. Holding the T-bar to prevent the 3-D H machine from sliding forward on the seat cushion,
proceed as follows:
(a)
(b)
return the back pan to the seat-back;
alternately apply and release a horizontal rearward load, not to exceed 25 N, to the
back angle bar at a height approximately at the centre of the torso weights until the hip
angle quadrant indicates that a stable position has been reached after load release.
Care shall be exercised to ensure that no exterior downward or lateral loads are
applied to the 3-D H machine. If another level adjustment of the 3-D H machine is
necessary, rotate the back pan forward, re-level, and repeat the procedure from
Paragraph 4.12.
4.14. Take all Measurements:
4.14.1. The co-ordinates of the "H" point are measured with respect to the three-dimensional
reference system.
4.14.2. The actual torso angle is read at the back angle quadrant of the 3-D H machine with the
probe in its fully rearward position.
4.15. If a re-run of the installation of the 3-D H machine is desired, the seat assembly should
remain unloaded for a minimum period of 30 minutes prior to the re-run. The
3-D H machine should not be left loaded on the seat assembly longer than the time required
to perform the test.

ANNEX 3 – APPENDIX 1
DESCRIPTION OF THE THREE DIMENSIONAL "H" POINT MACHINE
1. BACK AND SEAT PANS
(3-D H Machine)
The back and seat pans are constructed of reinforced plastic and metal; they stimulate the
human torso and thigh and are mechanically hinged at the "H" point. A quadrant is fastened to
the probe hinged at the "H" point to measure the actual torso angle. An adjustable thigh bar,
attached to the seat pan, establishes the thigh centreline and serves as a baseline for the hip
angle quadrant.
2. BODY AND LEG ELEMENTS
Lower leg segments are connected to the seat pan assembly at the T-bar joining the knees,
which is a lateral extension of the adjustable thigh bar. Quadrants are incorporated in the lower
leg segments to measure knee angles. Shoe and foot assemblies are calibrated to measure
the foot angle. Two spirit levels orient the device in space. Body element weights are placed
at the corresponding centres of gravity to provide seat penetration equivalent to a 76 kg male.
All joints of the 3-D H machine should be checked for free movement without encountering
noticeable friction.

Figure 2
Dimensions of the 3-D H Machine Elements and Load Distribution
(Dimensions in mm)

ANNEX 3 – APPENDIX 3
REFERENCE DATA CONCERNING SEATING POSITIONS
1. CODING OF REFERENCE DATA
Reference data are listed consecutively for each seating position. Seating positions are
identified by a two-digit code. The first digit is an Arabic numeral and designates the row of
seats, counting from the front to the rear of the vehicle. The second digit is a capital letter
which designates the location of the seating position in a row, as viewed in the direction of
forward motion of the vehicle; the following letters shall be used:
L = left
C = centre
R = right
2. DESCRIPTION OF VEHICLE MEASURING ATTITUDE
2.1. Co-Ordinates of Fiducial Marks
X..........................................................
Y..........................................................
Z ..........................................................
3. LIST OF REFERENCE DATA
3.1. Seating Position:...................................................................................
3.1.1. Co-ordinates of "R" point
X..........................................................
Y..........................................................
Z ..........................................................
3.1.2. Design torso angle: .................................................................................
3.1.3. Specification for seat adjustment
horizontal:............................................
vertical:................................................
angular: ...............................................
torso angle: .........................................
Note: List reference data for further seating positions under 3.2, 3.3, etc.

Figure 2

ANNEX 6
TEST PROCEDURE FOR CHECKING ENERGY DISSIPATION
1. INSTALLATION, TEST APPARATUS, RECORDING INSTRUMENTS AND PROCEDURE
1.1. Setting Up
The seat, as mounted in the vehicle, shall be firmly secured to the test bench with the
attachment parts provided by the manufacturer, so as to remain stationary when the impact
is applied.
The seat-back, if adjustable, shall be locked in the position specified in Paragraph 6.1.1. of
this Regulation.
If the seat is fitted with a head restraint, the head restraint shall be mounted on the
seat-back as in the vehicle. Where the head restraint is separate, it shall be secured to the
part of the vehicle structure to which it is normally attached.
If the head restraint is adjustable, it shall be placed in the most unfavourable position
allowed by its adjusting systems.
1.2. Test Apparatus
1.2.1. This apparatus consists of a pendulum whose pivot is supported by ball-bearings and
whose reduced mass at its centre of percussion is 6.8 kg. The lower extremity of the
pendulum consists of a rigid headform 165 mm in diameter whose centre is identical with
the centre of percussion of the pendulum.
1.2.2. The headform shall be fitted with two accelerometers and a speed-measuring device, all
capable of measuring values in the direction of impact.
1.3. Recording Instruments
The recording instruments used shall be such that measurements can be made with the
following degrees of accuracy:
1.3.1. Acceleration:
accuracy = ± 5% of the actual value;
frequency class of data channel: class 600 corresponding to ISO Standard 6487 (1980);
cross-axis sensitivity = < 5% of the lowest point on the scale.

ANNEX 7
METHOD FOR TESTING THE STRENGTH OF SEAT ANCHORAGES AND THEIR ADJUSTMENT,
LOCKING AND DISPLACEMENT SYSTEMS
1. TEST OF RESISTANCE TO INERTIA EFFECTS
1.1. The seats to be tested shall be mounted on the vehicle body for which they are designed.
This vehicle body shall be firmly anchored on a test trolley as prescribed in the following
Paragraphs.
1.2. The method used for anchoring the vehicle body on the test trolley shall not result in a
reinforcement of the seat anchorages.
1.3. The seats and their parts shall be adjusted and locked as prescribed in Paragraph 6.1.1.
and in one of the positions described in Paragraph 6.3.3. or 6.3.4. of this Regulation.
1.4. If the seats of a group do not present essential differences in the sense of Paragraph 2.2. of
this Regulation, the tests prescribed in Paragraphs 6.3.1. and 6.3.2. of this Regulation may
be carried out with one seat adjusted to its foremost position and the other seat adjusted to
its rearmost position.
1.5. The trolley deceleration or acceleration is measured with data channels of frequency class
(CFC) 60 corresponding to the characteristics of International Standard ISO 6487(2002).
2. COLLISION TEST OF THE COMPLETE VEHICLE AGAINST A RIGID BARRIER
2.1. The barrier shall consist of a block of reinforced concrete of not less than 3 m width, not less
than 1.5 m height and not less than 0.6 m thickness. The front face shall be perpendicular
to the final part of the run-up track and shall be covered with plywood boards 19 ± 1 mm
thick. At least 90 tonnes of earth shall be compressed behind the block of reinforced
concrete. The barrier of reinforced concrete and earth may be replaced by obstacles having
the same front surface, provided that they give equivalent results.
2.2. At the moment of impact the vehicle shall run free. It shall reach the obstacle on a course
perpendicular to the collision wall; the maximum lateral misalignment allowed between the
vertical median line of the front of the vehicle and the vertical median line of the collision
wall shall be ± 30 cm; at the moment of impact the vehicle shall no longer be subjected to
the action of any additional steering or propelling device. The speed on impact shall be
between 48.3 km/h and 53.1 km/h.
2.3. The fuel feed system shall be filled to at least 90% of its capacity with fuel or an equivalent
liquid.

ANNEX 9
TEST PROCEDURE FOR DEVICES INTENDED TO PROTECT THE OCCUPANTS AGAINST
DISPLACEMENT OF LUGGAGE
1. TEST BLOCKS
Rigid blocks, with the centre of inertia in the geometric centre.
Type 1
Dimensions:
Mass:
300 mm x 300 mm x 300 mm
all edges and corners rounded to 20 mm
18 kg
Type 2
Dimensions:
Mass:
500 mm x 350 mm x 125 mm
all edges and corners rounded to 20 mm
10 kg
2. TEST PREPARATION
2.1. Test of Seat-backs (see Figure 1)
2.1.1. General Requirements
2.1.1.1. At the option of the car manufacturer, parts whose hardness is lower than 50 Shore A can
be removed from the tested seat and head restraint for the test.
2.1.1.2. Two Type 1 test blocks shall be placed on the floor of the luggage compartment. In order to
determine the location of the test blocks in the longitudinal direction, they shall first be
positioned such that their front side contacts that part of the vehicle which constitutes the
forward boundary of the luggage compartment and that their lower side rests on the floor of
the luggage compartment. They shall then be moved backwards and parallel to the
longitudinal median plane of the vehicle until their geometrical centre has traversed a
horizontal distance of 200 mm. If the dimensions of the luggage compartment do not allow
a distance of 200 mm and if the rear seats are horizontally adjustable, these seats shall be
moved forward to the limit of the adjustment range intended for normal occupant use, or to
the position resulting in a distance of 200 mm, whichever is less. In other cases, the test
blocks shall be placed as far as possible behind the rear seats. The distance between the
longitudinal median plane of the vehicle and the inward facing side of each test block shall
be 25 mm to obtain a distance of 50 mm between both blocks.
2.1.1.3. During the test, the seats must be adjusted to ensure that the locking system cannot be
released by external factors. If applicable, the seats shall be adjusted as follows:
The longitudinal adjustment shall be secured one notch or 10 mm in front of the rearmost
possible position of use specified by the manufacturer (for seats with independent vertical
adjustment, the cushion shall be placed to its lowest possible position). The test shall be
carried out with the seat-backs in their normal position of use.

2.2. Test of Partitioning Systems
For the test of the partitioning systems above the seat-backs, the vehicle shall be fitted with
a fixed raised test floor having a load surface that locates the centre of gravity of the test
block centrally between the top edge of the bordering seat-back (without taking into account
the head restraints) and the bottom edge of the roof lining. A Type 2 test block is placed on
the raised test floor with its largest surface 500 x 350 mm, centrally in relation to the
longitudinal axis of the vehicle and with its surface 500 x 125 mm to the front. Partitioning
systems behind which the Type 2 test block cannot be installed are exempted from this test.
The test block is placed directly in contact with the partitioning system. In addition, two
Type 1 test blocks are positioned in accordance with Paragraph 2.1. in order to perform a
simultaneous test on the seat-backs (see Figure 2).
Figure 2
Testing of a Partitioning System above the Backrest
2.2.1. If the seat-back is fitted with a head restraint, the test must be carried out with the head
restraint placed in the highest position, if adjustable.
3. DYNAMIC TESTING OF SEAT-BACKS AND PARTITIONING SYSTEMS USED AS
LUGGAGE RESTRAINT SYSTEMS.
3.1. The body of the passenger car shall be anchored securely to a test sled, and this anchorage
shall not act as reinforcement for seat-backs and the partitioning system. After the
installation of the test blocks as described in Paragraphs 2.1. or 2.2., the passenger car
body shall be decelerated or, at the choice of the applicant, accelerated such that the curve
remains within the area of the graph in Annex 9, Appendix, and the total velocity change ΔV
is 50 +0/-2 km/h. With the agreement of the manufacturer, the above described test pulse
corridor can be used alternatively to fulfil the test of the seat strength according to
Paragraph 6.3.1.

Seat Anchorages and Head Restraints.