Regulation No. 12-03

Name:Regulation No. 12-03
Description:Driver Protection from Steering Mechanism in an Impact.
Official Title:Uniform Provisions Concerning the Approval of: Vehicles with Regard to the Protection of the Driver Against the Steering Mechanism in the Event of Impact.
Country:ECE - United Nations
Date of Issue:1969-06-01
Amendment Level:03 Series, Supplement 3
Number of Pages:42
Vehicle Types:Car, Component, Light Truck
Subject Categories:Prior Versions
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Keywords:

steering, vehicle, control, approval, regulation, type, paragraph, test, point, machine, manufacturer, annex, impact, seat, angle, position, means, mechanism, torso, amendments, body, series, driver, block, tests, granted, technical, force, requirements, approved, seating, case, service, reference, event, protection, production, mass, back, date, regard, pursuant, front, design, actual, vehicles, system, number, applying, pan

Text Extract:

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E/ECE/324 )
E/ECE/TRANS/505 ) Add.11/Rev.3/Corr.4
February 14, 2011
STATUS OF UNITED NATIONS REGULATION
ECE 12-03
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
VEHICLES WITH REGARD TO THE PROTECTION OF
THE DRIVER AGAINST THE STEERING MECHANISM
IN THE EVENT OF IMPACT
Incorporating:
03 series of amendments
Date of Entry into Force: 24.08.93
Corr. 1 to Revision 3
Dated: 10.03.95
Corr. 2 to Revision 3
Dated: 17.09.09
Corr. 3 to Revision 3
Dated: 03.03.10
Corr. 4 to Revision 3
Dated: 23.12.10
Supplement 1 to the 03 series of amendments
Date of Entry into Force: 12.12.96
Supplement 2 to the 03 series of amendments
Date of Entry into Force: 25.12.97
Corr. 1 to Supplement 2 to the 03 series of amendments
Dated: 23.06.97
Supplement 3 to the 03 series of amendments
Date of Entry into Force: 23.03.00

REGULATION
REGULATION No. 12
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF VEHICLES
WITH REGARD TO THE PROTECTION OF THE DRIVER AGAINST
THE STEERING MECHANISM IN THE EVENT OF IMPACT
Contents
1.
Scope
2.
Definitions
3.
Application for Approval
4.
Approval
5.
Specifications
6.
Tests
7.
Modifications and Extension of Approval of the Vehicle Type or Steering Control Type
8.
Conformity of Production
9.
Penalties for Non-conformity of Production
10.
Instructions
11.
Production Definitely Discontinued
12.
Names and Addresses of Technical Services Responsible for Conducting Approval Tests
and of Administrative Departments
13.
Transitional Provisions
ANNEXES
Annex 1A

Communication concerning the approval or extension or refusal or withdrawal of
approval or production definitely discontinued of a vehicle type with regard to the
protection of the driver against the steering mechanism in the event of impact,
pursuant to Regulation No. 12.
Annex 1B

Communication concerning the approval or extension or refusal or withdrawal of
approval or production definitely discontinued of a steering control type with regard
to the protection of the driver against the steering mechanism in the event of
impact, pursuant to the relevant part of Regulation No. 12
Annex 2 – Arrangements of Approval Marks
Annex 3 – Frontal-impact Test Against a Barrier
Annex 4 – Body Block Test
Annex 5 – Head Form Test
Annex 6

Procedure for Determining the "H" Point and the Actual Torso Angle for Seating
Positions in Motor Vehicles.
Appendix 1 –
Appendix 2 –
Appendix 3 –
Description of the Three Dimensional "H" Point Machine
Three-Dimensional Reference System
Reference Data Concerning Seating Positions

2.5 "steering control" means the steering device, usually the steering wheel, which is actuated
by the driver;
2.6 "general steering control" means a steering control which can be fitted to more than one
approved vehicle type where differences in the attachment of the steering control to the
steering column do not affect the impact performance of the steering control;
2.7 "Air-bag" means a flexible bag that is designed to be filled with a gas under pressure, and
is:
2.7.1 designed to protect the vehicle driver in an impact against the steering control;
2.7.2 inflated by a device which is actuated in case of vehicle's impact;
2.8 "steering control rim" means the quasi-toroidal outer ring in the case of the steering wheel
usually griped by the driver's hands during driving;
2.9 "spoke" means a bar connecting the steering control rim to the boss;
2.10 "Boss" means that part of the steering control, usually at the centre, that:
2.10.1 joins the steering control to the steering shaft,
2.10.2 transmits the torque from the steering control to the steering shaft;
2.11 "centre of the steering control boss" means that point on the surface of the boss which is
in line with the axis of the steering shaft;
2.12 "plane of the steering control" means in the case of the steering wheel the flat surface that
splits the steering wheel rim equally between the driver and the front of the car;
2.13 "steering shaft" means the component which transmits to the steering gear the torque
applied to the steering control;
2.14 "steering column" means the housing enclosing the steering shaft;
2.15 "steering mechanism" means the aggregate comprising the steering control, the steering
column, the assembly accessories, the steering shaft, the steering gear housing, and all other
components such as those designed to contribute to the absorption of energy in the event of
impact against the steering control;
2.16 "passenger compartment" means the space for occupant accommodation, bounded by the
roof, floor, side walls, doors, outside glazing, front bulkhead, and the plane of the rear
compartment bulkhead or the plane of the rear seat back support, and if necessary any
partition of the tray(s) containing the monoblocs of the electric vehicle's propulsion battery;
2.17 "Impactor" consists of a rigid hemispherical headform 165 mm in diameter, in accordance
with Annex 5, Paragraph 3 of this Regulation;

3.1.3 The following shall be submitted to the technical service responsible for conducting approval
tests:
3.1.3.1 a vehicle, representative of the vehicle type to be approved, for the test referred to in
Paragraph 5.1. below;
3.1.3.2 at the manufacturer's discretion, with the agreement of the technical service, either a second
vehicle, or those parts of the vehicle regarded by him as essential for the test referred to in
Paragraphs 5.2. and 5.3. below.
3.1.3.3 The competent authority shall verify the existence of satisfactory arrangements for ensuring
effective control of the conformity of production before type approval is granted.
3.2 Steering Control Type
3.2.1 The application for approval of a steering control type with regard to the protection of the
driver against the steering mechanism in the event of an impact shall be submitted by the
steering control manufacturer or by his duly accredited representative.
3.2.2 It shall be accompanied by the undermentioned documents in triplicate and the following
particulars:
3.2.2.1 a detailed description of the steering control type with respect to the structure, the dimensions
and the constituent materials of the steering control;
3.2.2.2 drawings, on an appropriate scale and in sufficient detail, of the steering mechanism and of its
attachment to the vehicle chassis and body.
3.2.2.3 evidence that the steering control complies with the specifications of Paragraphs 5.2.1.4 and
5.2.1.5 of Regulation No. 94, 01 series of amendments if the application for approval is
submitted by the applicant pursuant Paragraph 5.2.1 below.
3.2.3 A steering control representative of the steering control type to be approved plus, at the
manufacturer's discretion, with the agreement of the technical service, those parts of the
vehicle regarded by him as essential for the test, shall be submitted to the technical service
responsible for conducting approval tests for the test referred to in Paragraphs 5.2. and 5.3.
below.

4.2.5 If the vehicle conforms to a vehicle type approved, under one or more other Regulations
annexed to the Agreement, in the country which has granted approval under this Regulation,
the symbol prescribed in Paragraph 4.2.4.1. need not be repeated; in such a case the
Regulation and approval numbers and the additional symbols of all the Regulations under
which approval has been granted in the country which has granted approval under this
Regulation shall be placed in vertical columns to the right of the symbol prescribed in
Paragraph 4.2.4.1.
4.2.6 The approval mark shall be clearly legible and be indelible.
4.2.7 The approval mark shall be placed close to or on the vehicle data plate affixed by the
manufacturer.
4.3 Steering-Control Type
4.3.1 If the steering control submitted for separate approval pursuant to this Regulation meets the
applicable requirements of Paragraphs 5. and 6. below and Annexes 4, 5 and 6 to this
Regulation, approval of that steering control type shall be granted. This is only applicable to
steering controls which do not include an airbag.
4.3.2 An approval number shall be assigned to each type approved. Its first two digits (at present
03 corresponding to the 03 series of amendments, entered into force on August 24, 1993)
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 shall not assign the same number to another steering control type as
defined in Paragraph 2.4. above.
4.3.3 Notice of approval or of extension or refusal of approval of a steering control 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 1B to this Regulation.
4.3.4 There shall be affixed, conspicuously and in a readily accessible place specified on the
approval form, to every steering control conforming to a steering control type approved under
this Regulation an international approval mark consisting of:
4.3.4.1 a circle surrounding the Letter "E" followed by the distinguishing number of the country which
has granted approval
4.3.4.2. the approval number placed below the circle.
4.3.4.3 the Symbol R94-01 in the case of an approval pursuant Paragraph 5.2.1 below.
4.3.5 The approval mark shall be clearly legible and be indelible.
4.4 Annex 2 to this Regulation gives examples of arrangements of approval marks.

5.4.1.1 After any impact test prescribed in Paragraphs 5.2. and 5.3. the part of the steering control
surface directed towards the driver shall not present any sharp or rough edges likely to
increase the danger or severity of injuries to the driver. Small surface cracks and fissures
shall be disregarded.
5.4.1.1.1. In the case of a projection consisting of a component made of non-rigid material of less than
50 Shore A hardness mounted on rigid support, the requirement of Paragraph 5.4.1.1. shall
only apply to the rigid support.
5.4.2 The steering control shall be so designed, constructed and fitted as not to embody
components or accessories, including the horn control and assembly accessories, capable of
catching in the driver's clothing or jewellery in normal driving movements.
5.4.3 In the case of steering controls not intended to form part of the original equipment they shall
be required to meet the specification when tested in accordance with Annex 4,
Paragraph 2.1.3. and Annex 5, Paragraph 2.3.
5.4.4 In the case of "general steering controls", the requirements shall be met over:
5.4.4.1 the full range of column angles, it being understood that the tests shall be performed at least
for the maximum and minimum column angles for the range of approved vehicle types for
which the controls are intended;
5.4.4.2. the full range of possible impactor and body block positions in relation to the steering control,
it being understood that the test shall be performed at least for the mean position for the
range of approved vehicle types for which the controls are intended. Where a steering
column is used, it shall be of a type corresponding to the "worst case" conditions.
5.4.5 Where adaptors are used to adapt a single type of steering control to a range of steering
column, and it can be demonstrated that with such adaptors the energy-absorbing
characteristics of the system are the same, all the tests may be performed with one type of
adaptor.
6. TESTS
6.1 Compliance with the requirements of Paragraph 5. above shall be checked in accordance
with the methods set out in Annexes 3, 4 and 5 to this Regulation. All measurements should
be done on the basis of ISO 6487-1987.
6.2 However, other tests may be permitted at the discretion of the Approval Authority provided
equivalence can be demonstrated. In such a case a report shall be attached to the approval
documentation describing the methods used and the results obtained.
7. MODIFICATIONS AND EXTENSION OF APPROVAL OF THE VEHICLE TYPE OR
STEERING CONTROL TYPE
7.1 Every modification of the vehicle type or steering control type or both shall be notified to the
administrative department which approved the vehicle type or the steering control type. The
department may then either:
7.1.1 consider that the modifications made are unlikely to have an appreciable adverse effect and
that in any case the vehicle still complies with the requirements; or
7.1.2 require a further test report from the technical service responsible for conducting the tests.

8.4.3 Where the quality level appears unsatisfactory or it seems necessary to verify the validity of
the tests carried out in application of Paragraph 8.4.2., the inspector shall select samples to
be sent to the technical service which conducted the type approval tests.
8.4.4 The competent authority may carry out any test prescribed in this Regulation. The normal
frequency of inspections authorized by the competent authority shall be one per year. In
cases where unsatisfactory results are found during one of these inspections, the competent
authority shall ensure that all necessary steps are taken to restore conformity of production as
rapidly as possible.
9. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
9.1 The approval granted in respect of a vehicle type or steering control type, pursuant to this
Regulation, may be withdrawn if the requirement laid down in Paragraph 8.1. above is not
complied with, or if the vehicle(s) or steering control(s) selected have failed to pass the
checks prescribed in Paragraph 8.2. above.
9.2 If a Contracting Party to the Agreement applying this Regulation withdraws an approval it has
previously granted, it shall forthwith so notify the other Contracting Parties applying this
Regulation by means of a communication form conforming to the model in Annex 1A or
Annex 1B to this Regulation (as appropriate).
10. INSTRUCTIONS
In the case of a steering control type supplied separately from a vehicle, the packaging and
installation instructions must clearly state the vehicle type(s) for which it is intended.
11. PRODUCTION DEFINITELY DISCONTINUED
If the holder of the approval completely ceases to manufacture a type of vehicle or type of
steering control 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 1A or Annex 1B to this Regulation
(as appropriate).
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, refusal or withdrawal of approval, issued in other
countries, are to be sent.

ANNEX 1A
(Maximum format: A4 (210 x 297 mm)
COMMUNICATION
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 protection of the driver against the steering mechanism in the event of
impact, pursuant to Regulation No. 12.
Approval No...................................................
Extension No:...........................................
1. Trade name or mark of the vehicle:..............................................................................................
2. Vehicle type: .................................................................................................................................
3. Manufacturer's name and address: ..............................................................................................
4. If applicable, name and address of the manufacturer's representative:.......................................
......................................................................................................................................................
5. Brief description of the steering mechanism and the components of the vehicle contributing to
the protection of the driver against the steering mechanism in the event of impact ....................
6. Mass of the vehicle during the test...............................................................................................
front axle: ......................................................................................................................................
rear axle:.......................................................................................................................................
total: ..............................................................................................................................................

ANNEX 1B
(Maximum format: A 4 (210 x 297 mm)
COMMUNICATION
issued by: Name of administration:
.................................................................
.................................................................
.................................................................
concerning:
APPROVAL GRANTED
APPROVAL EXTENDED
APPROVAL REFUSED
APPROVAL WITHDRAWN
PRODUCTION DEFINITELY DISCONTINUED
of a steering control type with regard to the protection of the driver against the steering mechanism in the
event of impact, pursuant to the relevant part of Regulation No. 12.
Approval No...................................................
Extension No:...........................................
1. Trade name or mark of the steering control .................................................................................
2. Manufacturer's name and address ...............................................................................................
......................................................................................................................................................
3. If applicable, name and address of the manufacturer's representative
......................................................................................................................................................
4. Vehicle type(s) to which the control is intended to be fitted .........................................................
......................................................................................................................................................
5. Brief description of the steering control and of the components contributing to the protection of
the driver against the steering mechanism in the event of impact ...............................................
......................................................................................................................................................
6. Steering control submitted for approval on...................................................................................
7. Technical service responsible for conducting approval tests .......................................................
......................................................................................................................................................
8. Date of report issued by that service............................................................................................

ANNEX 2
ARRANGEMENTS OF APPROVAL MARKS
Model A
(See Paragraph 4.2.4 of this Regulation)
The above approval mark affixed to a vehicle shows that the vehicle type concerned has, with regard to
the protection of the driver against the steering mechanism in the event of impact, been approved in the
Netherlands (E4) pursuant to Regulation No. 12. The approval number indicates that the approval was
granted according to the requirements of Regulation No. 12 as amended by the 03 series of
amendments.
Model B
(See Paragraph 4.2.5 of this Regulation)
The above approval mark affixed to a vehicle shows that the vehicle type concerned has been approved
in the Netherlands (E4) pursuant to Regulations Nos. 12 and 39. The approval numbers indicate that,
at the dates when the respective approvals were given, Regulation No. 12 included the 03 series of
amendments and Regulation No. 39 the 04 series of amendments.

ANNEX 3
FRONTAL-IMPACT TEST AGAINST A BARRIER
1. PURPOSE
The purpose of this test is to verify whether the vehicle satisfies the requirements set forth in
Paragraph 5.1.
2. INSTALLATIONS, PROCEDURE AND MEASURING INSTRUMENTS
2.1. Testing Ground
2.2. Barrier
The test area shall be large enough to accommodate the run-up track, barrier and technical
installations necessary for the test. The last part of the track, for at least 5 m before the
barrier, shall be horizontal (slope less than 3% measured over a length of one metre), flat and
smooth.
The barrier shall consist of a block of reinforced concrete not less than 3 m wide in front and
not less than 1.5 m high. The barrier shall be of such thickness that it weighs at least
70 metric tons. The front face shall be flat, vertical and perpendicular to the axis of the run-up
track. It shall be covered with plywood boards 20 ± 2 mm thick, in good condition. A
structure on a steel plate at least 25 mm thick may be placed between the plywood board and
the barrier. A barrier with different characteristics may likewise be used, provided that the
area of the impact surface is greater than the frontal crash area of the vehicle being tested
and provided that it gives equivalent results.
2.3. Propulsion of Vehicle
At the moment of impact the vehicle shall no longer be subject to the action of any additional
steering or propelling device. It shall reach the obstacle on a course perpendicular to the
collision wall; the maximum lateral misalignment tolerated between the vertical median line of
the front of the vehicle and the vertical median line of the collision wall is ± 30 cm.
2.4. State of Vehicle
2.4.1. For the test, the vehicle shall either be fitted with all the normal components and equipment
included in its unladen kerb mass or be in such a condition as to satisfy this requirement so
far as the components and equipment of concern to the passenger compartment and the
distribution of the mass of the vehicle as a whole, in running order, are concerned.
At the request of the manufacturer, by derogation from Paragraph 5.1. of this Regulation, the
test may be carried out with manikins in position, provided they do not at any time hinder the
movement of the steering mechanism. The mass of the manikins shall not be taken into
account for the purposes of the test.
2.4.2. If the vehicle is driven by external means, the fuel feed system shall be filled to at least 90%
of its capacity with a non-inflammable liquid having a density between 0.7 and 1. All the other
systems (brake-fluid reservoirs, radiator, etc.) may be empty.

4. CORRECTION FACTORS
4.1. Notation
V
m
m
D
D
Recorded speed in km/h;
Mass of prototype in the state defined in Paragraph 2.4. of this Annex;
Mass of prototype with testing apparatus;
Variation in the distance measured during the impact, as defined in
Paragraph 3.1. of this Annex;
Variation in the distance used to determine the results of the test;
K = the greater of
(43.3)
v
and 0.83;
K = the greater of m
m and 0.8;
4.2. The corrected variation D used to check the conformity of the prototype with the
requirements of this Regulation shall be calculated by the following formula:
D
= D
⋅ K
⋅ K
4.3. A frontal impact test against a barrier is not needed in the case of a vehicle which is identical
with the prototype considered as regards the characteristics specified in Paragraph 2.2. of this
Regulation but whose mass m is greater than m , if m is not more than 1.25 m and if the
corrected variation D obtained from the variation D by the formula
D
m ⋅ D
=
m
is such as to show that the new vehicle still meets the requirements of Paragraph 5. of this
Regulation.
5. EQUIVALENT PROCEDURES
5.1. Alternative tests may be permitted at the discretion of the Approval Authority provided
equivalence can be demonstrated. A report shall be attached to the approval documentation
describing the method used and the results obtained or the reason for not carrying out the
test.
5.2. Responsibility for demonstrating the equivalence of the alternative method shall rest with the
manufacturer or his agent wishing to use such a method.

2.3. Body Block
The body block shall have the shape, dimensions, mass and characteristics shown in the
appendix to this Annex.
2.3.1. Following are non mandatory additional guidelines for mechanical properties of the body
block:
(a)
(b)
Rate of loading during stiffness measurement: 250 ± 50 mm/min;
Centre of gravity: 551.2 ± 6 mm from top of the body block;
(c) Moment of inertia about lateral axis through centre of gravity: 2.26 ± 0.23 kg × m .
2.4. Measurement of Forces
2.4.1. Measurements shall be made of the maximum force, acting horizontally and parallel to the
longitudinal axis of the vehicle, applied to the body block as a result of impact against the
steering control.
2.4.2. This force may be measured directly or indirectly or may be calculated from values recorded
during the test.
2.5. Propulsion of the Body Block
2.5.1. Any method of propulsion may be used, provided that when the body block strikes the
steering control it is free from all connection with the propelling device. The body block shall
strike this control after an approximately straight trajectory parallel to the longitudinal axis of
the vehicle.
2.5.2. The H point of the body block, indicated by a special mark, shall be so adjusted that before
the impact it is in the horizontal plane passing through the R point as indicated by the
manufacturer of the vehicle.
2.6. Speed
+ 1.2 + 0. 8
The body block shall strike the steering control at a speed of 24.1 − 0 km/h (15 − 0 mph ).
However, if the test has been carried out at a higher impact speed and the control has met
the requirements laid down, the test shall be considered satisfactory.
2.7. Measuring Instruments
2.7.1. The instrumentation used to record the parameters referred to in Paragraph 5.2. of this
Regulation shall enable the measurements to be made with the following accuracy:
2.7.1.1. Speed of body block: within 2%;
2.7.1.2. Time recording: within 1/1000 second;
2.7.1.3. The beginning of the impact (zero point) at the moment of first contact of the body block with
the steering control shall be identified on the recordings and films used for analysing the
results of the test.

ANNEX 4 - APPENDIX
BODY BLOCK
(Mass: 34-36 kg. 50th percentile torso-shaped body block)
Spring rate: 105 – 140 N/mm
The chest is loaded with a 100 mm beam as shown,
90° to the longitudinal axis of the block and parallel to
the backing plate. The load is measured when the beam
has moved 12,7 mm into the body block.
Dimensions in mm

3. TEST APPARATUS
3.1. This apparatus consists of a fully guided linear impactor, rigid, with a mass of 6.8 kg. Its
impact surface is hemispherical with a diameter of 165 mm.
3.2. The head-form shall be fitted with two accelerometers capable of measuring values in the
impact direction.
3.3. Measuring Instruments
3.3.1. The measuring instruments used shall comply with ISO 6487: 1987. In addition they shall
have the following characteristics:
3.3.2. Acceleration
3.3.3. Speed
Channel amplitude class 150 g CAC
Channel frequency class 600 Hz CFC.
Accuracy to within ± 1%
3.3.4. Time Recording
The instrumentation shall enable the action to be recorded throughout its duration and the
readings to be made with the accuracy to one-thousandth of a second. The beginning of the
impact at the moment of first contact between the impactor and the steering control shall be
noted on the recordings used for analysing the test.
4. TEST PROCEDURE
4.1. The plane of the steering control shall be set up perpendicular to the direction of impact.
4.2. A maximum of four and a minimum of three positions on each steering control wheel type
shall be impacted. A new steering control shall be used for each impact. On successive
impacts the axial axis of the impactor shall be in line with one of the following points:
4.2.1. The centre of the steering control boss;
4.2.2. The joint of the stiffest or most supported spoke to the inner edge of the steering control rim;
4.2.3. The mid-point of the shortest unsupported area of the steering control rim that does not
include a spoke when hit by the head form;
4.2.4. At the discretion of the type approving authority, the "worst case" position on the steering
control.
4.3. The impactor shall strike the steering control at a velocity of 24.1 km/h; this velocity shall be
achieved either by the mere energy of propulsion or by using an additional propelling device.

Figure 1a
Testing Set-up
Figure 1b
Measurement of the Testing Set-up Rigidity
Under a load of 800 daN producing a couple of 160 m.daN in relation to the Point "B", the displacement
in any direction of the Point "A" shall be lower than 2 mm.

2.8. "Centreplane of occupant" (C/LO) means the median plane of the 3-D H machine
positioned in each designated seating position; it is represented by the co-ordinate of the
"H" point on the "Y" axis. For individual seats, the centreplane of the seat coincides with the
centreplane of the occupant. For other seats, the centreplane of the occupant is specified by
the manufacturer;
2.9. "Three-dimensional reference system" means a system as described in Appendix 2 to this
Annex;
2.10. "Fiducial marks" are physical points (holes, surfaces, marks or indentations) on the vehicle
body as defined by the manufacturer;
2.11. "Vehicle measuring attitude" means the position of the vehicle as defined by the
co-ordinates of fiducial marks in the three-dimensional reference system.
3. REQUIREMENTS
3.1. Data Presentation
For each seating position where reference data are required in order to demonstrate
compliance with the provisions of the present Regulation, all or an appropriate selection of the
following data shall be presented in the form indicated in Appendix 3 to this Annex:
3.1.1. the co-ordinates of the "R" point relative to the three-dimensional reference system;
3.1.2. the design torso angle;
3.1.3. all indications necessary to adjust the seat (if it is adjustable) to the measuring position set out
in Paragraph 4.3. below.
3.2. Relationship Between Measured Data and Design Specifications
3.2.1. The co-ordinates of the "H" point and the value the actual torso angle obtained by the
procedure set out in Paragraph 4. below shall be compared, respectively, with the
co-ordinates of the "R" point and the value of the design torso angle indicated by the vehicle
manufacturer.
3.2.2. The relative positions of the "R" point and the "H" point and the relationship between the
design torso angle and the actual torso angle shall be considered satisfactory for the seating
position in question if the "H" point, as defined by its co-ordinates, lies within a square of
50 mm side length with horizontal and vertical sides whose diagonals intersect at the
"R" point, and if the actual torso angle is within 5° of the design torso angle.
3.2.3. If these conditions are met, the "R" point and the design torso angle, shall be used to
demonstrate compliance with the provisions of this Regulation.
3.2.4. If the "H" point or the actual torso angle does not satisfy the requirements of Paragraph 3.2.2.
above, the "H" point and the actual torso angle shall be determined twice more (three times in
all). If the results of two of these three operations satisfy the requirements, the conditions of
Paragraph 3.2.3. above shall apply.

4.7.1.1. Both feet and leg assemblies shall be moved forward in such a way that the feet take up
natural positions on the floor, between the operating pedals if necessary. Where possible the
left foot shall be located approximately the same distance to the left of the centreplane of the
3-D H machine as the right foot is to the right. The spirit level verifying the transverse
orientation of the 3-D H machine is brought to the horizontal by readjustment of the seat pan if
necessary, or by adjusting the leg and foot assemblies towards the rear. The line passing
through the "H" point sight buttons shall be maintained perpendicular to the longitudinal
centreplane of the seat.
4.7.1.2. If the left leg cannot be kept parallel to the right leg and the left foot cannot be supported by
the structure, move the left foot until it is supported. The alignment of the sight buttons shall
be maintained.
4.7.2. Designated Seating Position: Outboard Rear
For rear seats or auxiliary seats, the legs are located as specified by the manufacturer. If the
feet then rest on parts of the floor which are at different levels, the foot which first comes into
contact with the front seat shall serve as a reference and the other foot shall be so arranged
that the spirit level giving the transverse orientation of the seat of the device indicates the
horizontal.
4.7.3. Other Designated Seating Positions:
The general procedure indicated in Paragraph 4.7.1. above shall be followed except that the
feet shall be placed as specified by the vehicle manufacturer.
4.8. Apply lower leg and thigh weights and level the 3-D H machine.
4.9. Tilt the back pan forward against the forward stop and draw the 3-D H machine away from the
seat-back using the T-bar. Reposition the 3-D H machine on the seat by one of the following
methods:
4.9.1. If the 3-D H machine tends to slide rearward, use the following procedure. Allow the 3-D H
machine to slide rearward until a forward horizontal restraining load on the T-bar is no longer
required i.e. until the seat pan contacts the seat-back. If necessary, reposition the lower leg.
4.9.2. If the 3-D H machine does not tend to slide rearward, use the following procedure. Slide the
3-D H machine rearwards by applying a horizontal rearward load to the T-bar until the seat
pan contacts the seat-back (see Figure 2 of Appendix 1 to this Annex).
4.10. Apply a 100 ± 10 N load to the back and pan assembly of the 3-D H machine at the
intersection of the hip angle quadrant and the T-bar housing. The direction of load application
shall be maintained along a line passing by the above intersection to a point just above the
thigh bar housing (see Figure 2 of Appendix 1 to this Annex). Then carefully return the back
pan to the seat-back. Care must be exercised throughout the remainder of the procedure to
prevent the 3-D H machine from sliding forward.
4.11. Install the right and left buttock weights and then, alternately, the eight torso
weights. Maintain the 3-D H machine level.

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.
4.16. If the seats in the same row can be regarded as similar (bench seat, identical seats, etc.) only
one "H" point and one "actual torso angle" shall be determined for each row of seats, the
3-D H machine described in Appendix 1 to this Annex being seated in a place regarded as
representative for the row. This place shall be:
4.16.1. in the case of the front row, the driver's seat;
4.16.2. in the case of the rear row or rows, an outer seat.

Figure 1
3-D H Machine Elements Designation

ANNEX 6 – APPENDIX 2
THREE-DIMENSIONAL REFERENCE SYSTEM
1. The three-dimensional reference system is defined by three orthogonal planes established by
the vehicle manufacturer (see Figure).
2. The vehicle measuring attitude is established by positioning the vehicle on the supporting
surface such that the co-ordinates of the fiducial marks correspond to the values indicated by
the manufacturer.
3. The co-ordinates of the "R" point and the "H" point are established in relation to the fiducial
marks defined by the vehicle manufacturer.
Figure
Three-dimensional Reference System

Driver Protection from Steering Mechanism in an Impact.