Regulation No. 80-01

Name:Regulation No. 80-01
Description:Seat and Seat Anchorage Strength - Large Passenger Vehicles.
Official Title:Uniform Provisions Concerning the Approval of: Seats of Large Passenger Vehicles and of these Vehicles with Regard to the Strength of the Seats and their Anchorages.
Country:ECE - United Nations
Date of Issue:1989-05-25
Amendment Level:01 Series, Corrigendum 2
Number of Pages:40
Vehicle Types:Bus, Component
Subject Categories:Prior Versions
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Keywords:

seat, approval, vehicle, regulation, test, type, position, seats, paragraph, point, machine, appendix, requirements, torso, annex, angle, means, manufacturer, back, seating, anchorages, reference, approved, vehicles, part, manikin, force, plane, amendments, measured, rear, series, tested, actual, vertical, procedure, number, passenger, horizontal, design, granted, pan, positions, system, tests, date, form, regard, parts, structure

Text Extract:

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E/ECE/324 )
E/ECE/TRANS/505 ) Rev.1/Add.79/Amend.1/Corr.1
February 25, 2009
STATUS OF UNITED NATIONS REGULATION
ECE 80-01
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
SEATS OF LARGE PASSENGER VEHICLES AND OF THESE VEHICLES WITH REGARD
TO THE STRENGTH OF THE SEATS AND THEIR ANCHORAGES
Incorporating:
00 series of amendments
Date of Entry into Force: 23.02.89
01 series of amendments
Date of Entry into Force: 08.02.98
Supplement 1 to the 01 series of amendments
Date of Entry into Force: 06.02.99
Supplement 2 to the 01 series of amendments
Date of Entry into Force: 29.12.00
Supplement 3 to the 01 series of amendments
Date of Entry into Force: 18.12.07
Corr. 2 of 15.01.09 to the 01 series of amendments
Date of Entry into Force: 12.11.08

REGULATION NO. 80
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF SEATS OF LARGE PASSENGER
VEHICLES AND OF THESE VEHICLES WITH REGARD TO THE STRENGTH OF THE SEATS AND
THEIR ANCHORAGES
Regulation
1. Scope
2. Definitions
3. Application for approval
4. Approval
5. Requirements for seats
CONTENTS
6. Requirements for seat anchorages of a vehicle type
7. Requirements for installation of seats in a vehicle type
8. Conformity of production
9. Penalties for non-conformity of production
10. Modifications and extension of approval of the seat type and/or the vehicle type
11. Production definitely discontinued
12. Transitional provisions
13. Names and addresses of technical services responsible for conducting approval tests and of
administrative departments.

REGULATION NO. 80
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF SEATS OF LARGE PASSENGER
VEHICLES AND OF THESE VEHICLES WITH REGARD TO THE STRENGTH OF THE SEATS AND
THEIR ANCHORAGES
1. SCOPE
1.1. This regulation applies to:
(a) Passenger seats for forward facing installation in vehicles of Categories M and M ,
of Classes II, III and B ;
(b)
Vehicles of Categories M and M of Classes II, III and B
in respect of their
passenger seat anchorages and seat installation.
1.2. At the request of the manufacturer vehicles of Category M approved to
Regulation No. 17 shall be deemed to meet the requirements of this Regulation.
1.3. Vehicles where some seats benefit from the derogation provided in Paragraph 7.4. to
Regulation No. 14 shall be approved to this Regulation.
2. DEFINITIONS
For the purposes of this Regulation:
2.1. "Approval of a seat" means an approval of a seat type as a component in relation to the
protection of the occupants of forward-facing seats with regard to their strength and the
design of the seat backs;
2.2. "Approval of a vehicle" means an approval of a vehicle type with regard to the strength
of the parts of the vehicle structure to which seats are to be secured, and with regard to
the installation of seats;
2.3. "Seat type" means seats which do not differ essentially with respect to the following
characteristics likely to affect their strength and their aggressiveness:
2.3.1. Structure, shape, dimensions and materials of the load bearing parts;
2.3.2. Types and dimensions of the seat back adjustment and locking system;
2.3.3. Dimensions, structure and materials of the attachments and supports (e.g. legs);
2.4. "Vehicle type" means vehicles which do not differ essentially in respect of:
2.4.1. The constructional features relevant to this Regulation; and
2.4.2. The type or types of type approved seat(s) fitted to the vehicle, if any.

2.20. "Manikin", a manikin corresponding to the specifications for HYBRID II or III.
2.21. "Reference zone" means the space between two vertical longitudinal planes, 400 mm
apart and symmetrical with respect to the H-point, and defined by rotation from vertical to
horizontal of the head-form apparatus, described in Regulation No. 21. Annex 1. The
apparatus shall be positioned as described in that Annex to Regulation No. 21 and set to
its maximum length of 840 mm and its minimum length of 736 mm for residual limitation of
said space.
2.22. "3-point belt" for the purposes of this Regulation also includes belts with more than three
anchorage points.
2.23. "Seat spacing" means, in the case of seats facing in the same direction, the distance
between the front seat squab and the back of the seat squab of the seat preceding it,
measured horizontally at the height of 620 mm above the floor.
3. APPLICATION FOR APPROVAL
3.1. The application for approval of a seat shall be submitted by the seat manufacturer or by
his duly accredited representative.
3.2. The application for approval of the vehicle shall be submitted by the vehicle manufacturer
or by his duly accredited representative.
3.3. The application for approval of a seat or a vehicle shall be accompanied by the following
documents in triplicate and the following particulars:
3.3.1. For Approval of a Seat:
3.3.1.1. A detailed description of the seat, its attachment fittings and its adjustment, displacement
and locking systems;
3.3.1.2. Drawings, on an appropriate scale and in sufficient detail, of the seat, its attachment
fittings and adjustment, displacement and locking systems;
3.3.2. For Approval of a Vehicle:
3.3.2.1. A detailed description of the parts of the structure of the vehicle used as anchorages;
3.3.2.2. Drawings, on an appropriate scale and in sufficient detail, of the parts of the vehicle used
as anchorages.
3.4. The following shall be submitted to the technical service responsible for the approval tests:
3.4.1. Two seats representative of the type to be approved, in the case of approval of a seat.
3.4.2. A part of the vehicle structure, in the case of approval of a vehicle.

5. REQUIREMENTS FOR SEATS
5.1. Each type of seat shall be subject to the test requirements of either Appendix 1 (dynamic
test) or Appendices 5 and 6 (static test) at the request of the manufacturer.
5.2. The tests which the seat type has passed shall be recorded in the communication form
concerning the approval of a seat type and conforming to the model in Annex 1.
5.3. Every adjustment and displacement system provided shall incorporate a locking system,
which shall operate automatically.
5.4. The adjustment and locking systems shall not be required to be in full working order after
the test.
6. REQUIREMENTS FOR SEAT ANCHORAGES OF A VEHICLE TYPE
6.1. The anchorages for the seats of the vehicle shall be capable of withstanding:
6.1.1. Either the test described in Appendix 2,
6.1.2. Or, if a seat is mounted on the part of the vehicle structure being tested, the tests
prescribed in Appendix 1. The seat need not be an approved seat provided that it
satisfies the requirements of Paragraph 3.2.1. of the above mentioned Appendix.
6.2. Permanent deformation, including breakage, of an anchorage or the surrounding area
shall be permissible provided that the prescribed force has been sustained throughout the
prescribed period.
6.3. When there is more than one type of anchorage on a vehicle, each variant shall be tested
in order to obtain an approval for the vehicle.
6.4. One test may be used to approve simultaneously a seat and a vehicle.
6.5. In the case of vehicles of Category M , seat anchorages shall be deemed to comply with
the requirements of Paragraphs 6.1 and 6.2 if the safety-belt anchorages of the
corresponding seating positions are fitted directly to the seats to be installed and these
belt anchorages comply with the requirements of Regulation No. 14, if necessary with the
derogation provided in Paragraph 7.4.
7. REQUIREMENTS FOR INSTALLATION OF SEATS IN A VEHICLE TYPE
7.1. All forward-facing seats installed shall be approved to the requirements of Paragraph 5 of
this Regulation and subject to the following conditions:
7.1.1. The seat shall have a reference height of at least 1 m; and
7.1.2. The H-point of the seat immediately behind shall be less than 72 mm higher than the
H-point of the seat in question or, if the seat behind has the H-point more than 72 mm
higher, the seat in question shall be tested and approved for installation in such a position.
7.2. When approved to Appendix 1, test 1 and 2 shall apply, except as follows:
7.2.1. Test 1 shall not apply where the rear of the seat cannot be struck by an unrestrained
passenger (i.e. there is no forward-facing seat directly behind the seat to be tested).

10. MODIFICATION AND EXTENSION OF APPROVAL OF THE SEAT TYPE AND/OR THE
VEHICLE TYPE
10.1. Every modification of the seat type and/or the vehicle type shall be notified to the
administrative department which approved the seat type and/or the vehicle type. The
department may then either:
10.1.1. Consider that the modifications made are unlikely to have an appreciable adverse effect
and that in any case the seat and/or the vehicle still complies with the requirements; or
10.1.2. Require a further test report from the technical service responsible for conducting the
tests.
10.2. Confirmation or refusal of approval, specifying the alterations shall be communicated by
the procedure specified in Paragraph 4.4. above to the Parties to the Agreement applying
this Regulation.
10.3. 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 a communication form conforming to the model in Annex 1
and/or Annex 2 to this Regulation.
11. PRODUCTION DEFINITELY DISCONTINUED
If the holder of the approval completely ceases to manufacture a vehicle type 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 and/or Annex 2 to this
Regulation.
12. TRANSITIONAL PROVISIONS
12.1. As from the official date of entry into force of the 01 series of amendments, no Contracting
Party applying this Regulation shall refuse to grant ECE approvals under this Regulation
as amended by the 01 series of amendments.
12.2. As from October 1, 1999 for vehicles of Category M with a maximum mass not exceeding
3 500 kg, and as from the sixtieth day after the entry into force of the 01 series of
amendments to this Regulation for vehicles of Category M , Contracting Parties applying
this Regulation shall grant ECE approvals only if the requirements of this Regulation, as
amended by the 01 series of amendments, are satisfied.
12.3. As from October 1, 2001 for vehicles of Category M with a maximum mass not exceeding
3 500 kg, and as from October 1, 1999 for vehicles of Category M , Contracting Parties
applying this Regulation may refuse to recognise approvals which were not granted in
accordance with the 01 series of amendments to this Regulation.

APPENDIX 1
TEST PROCEDURES FOR SEATS ACCORDING TO PARAGRAPH 5 AND/OR ANCHORAGES
ACCORDING TO PARAGRAPH 6.1.2.
1. REQUIREMENTS
1.1. The tests are to determine:
1.1.1. If the seat occupant(s) is (are) correctly retained by the seat(s) in front of him (them) and/or
by the use of a safety belt.
1.1.1.1. This requirement shall be considered satisfied if the forward movement of any part of the
trunk and the head of the manikin does not pass beyond the transversal vertical plane
situated at 1.6 m from the R point of the auxiliary seat;
1.1.2. If the seat occupant(s) is (are) not seriously injured.
1.1.2.1. This requirement shall be considered satisfied if the following biomechanical acceptability
criteria for the instrumented manikin, determined in accordance with Appendix 4, are met;
that is:
1.1.2.1.1. The head acceptability criterion HIC is less than 500;
1.1.2.1.2. The thorax acceptability criterion (ThAC) is less than 30g except for periods totalling less
than 3 ms (g = 9.81 m/s);
1.1.2.1.3. The femur acceptability criterion (FAC) is less than 10kN and the value of 8 kN is not
exceeded for periods totalling more than 20 ms;
1.1.3. If the seat and the seat mountings are strong enough.
1.1.3.1. This requirement shall be considered satisfied if:
1.1.3.1.1. No part of the seat, the seat mountings or the accessories becomes completely detached
during the test;
1.1.3.1.2. The seat remains firmly held, even if one or more anchorages are partly detached, and all
the locking systems remain locked during the whole duration of the test;
1.1.3.1.3. After the test no structural part of the seat or accessories has any fracture or sharp or
pointed edges or corners likely to cause any bodily injury.
1.2. All fittings forming part of the back of the seat or accessories thereto shall be such as to be
unlikely to cause any bodily injury to a passenger during impact. This requirement shall be
considered satisfied if any part contactable by a sphere 165 mm in diameter presents a
radius of curvature of at least 5 mm.
1.2.1. If any part of the fittings and accessories referred to above is made of a material of hardness
less than 50 Shore A on a rigid backing, the requirements set out in Paragraph 1.2 above
shall apply only to the rigid backing.

3.3. Manikin
3.3.1. The manikin shall be placed unrestrained on the auxiliary seat so that its plane of symmetry
corresponds to the plane of symmetry of the seating position in question.
3.3.2. The manikin's hands shall rest on its thighs with the elbows touching the seat back; the legs
shall be extended to the maximum and shall, if possible, be parallel; the heels shall touch the
floor.
3.3.3. Each manikin required shall be installed on a seat in accordance with the following
procedure:
3.3.3.1. The manikin shall be placed on the seat as close as possible to the desired position,
3.3.3.2. A flat rigid surface 76 mm x 76 mm in area shall be placed as low as possible against the
front of the manikin's torso,
3.3.3.3. The flat surface shall be pressed horizontally against the manikin's torso at a load of
between 25 and 35 daN:
3.3.3.3.1. The torso shall be drawn forward by the shoulders to the vertical position, then laid back
against the seat back. This operation shall be performed twice;
3.3.3.3.2. Without the torso moving, the head shall be placed in a position such that the platform
supporting the measuring instruments contained in the head is horizontal and that the
median sagittal plane of the head is parallel to that of the vehicle.
3.3.3.4. The flat surface be carefully removed,
3.3.3.5. The manikin shall be moved forward on the seat and the installation procedure described
above repeated,
3.3.3.6. If necessary, the position of the lower members shall be corrected,
3.3.3.7. The measuring instruments installed shall not in any way affect the movement of the manikin
during impact,
3.3.3.8. The temperature of the system of measuring instruments shall be stabilised before the test
and maintained so far as possible within a range between 19° and 26°C.
3.4. Impact Simulation
3.4.1. The total velocity change of the trolley simulating the impact shall be between 30 and
32 km/h.
3.4.2. The deceleration or, at the choice of the applicant, acceleration of the trolley during the
impact simulation shall be in accordance with the provisions shown in Figure 1 below.
Except for intervals totalling less than 3 ms, the curve of the trolley's deceleration or
acceleration as function of time shall remain between the limit curves shown in Figure 1.
3.4.3. Furthermore, the average deceleration or acceleration shall be comprised between 6.5 and
8.5 g.

APPENDIX 2
TEST PROCEDURE FOR THE ANCHORAGES OF A VEHICLE IN APPLICATION OF
PARAGRAPH 6.1.1.
1. TEST APPARATUS
1.1. A rigid structure sufficiently representative of the seat intended for use on the vehicle is fixed
by the means of fixation (bolts, screws, etc.) provided by the manufacturer to the parts of the
structure submitted to the tests.
1.2. If several seat types differing from one another in respect of the distance between the front
and back ends of their feet can be mounted on the same anchorage, the test shall be carried
out with the shortest footing. This footing shall be described on the type-approval certificate.
2. TEST PROCEDURE
2.1. A force F shall be applied.
2.1.1. At a height of 750 mm above the reference plane and on the vertical line containing the
geometrical centre of the surface bounded by the polygon having the different anchorage
points as apexes or, if applicable, the extreme anchorages of the seat, by the rigid structure
as defined in Paragraph 1.1. above;
2.1.2. In the horizontal direction and directed to the front of the vehicle;
2.1.3. In a delay as short as possible and for a duration of at least 0.2s.
2.2. The force F shall be determined either
2.2.1. By the following formula. F = (5000 ± 50) x i
where:
F is given in N and i represents the number of seating positions of the seat for which the
anchorages to be tested are to be approved; or, if requested by the manufacturer,
2.2.2. In accordance with the representative loads measured during dynamic tests as described in
Appendix 1 to this Regulation.

APPENDIX 4
DETERMINATION OF ACCEPTABILITY CRITERIA
1.1. This injury criterion (HIC) is calculated on the basis of the resultant triaxial acceleration
measured according to Appendix 3, Paragraph 2.2.1. by the following expression:

1
HIC =
⎢t
− t ∫

( t − t ) ⎢ γ dt
in which t and t are any values of time during the test, HIC being maximum value for and
interval t , t . The values of t and t are expressed in seconds.
2. THORAX ACCEPTABILITY CRITERION (ThAC)
2.1. This criterion is determined by the absolute value of resultant acceleration, expressed in g
and measured according to Appendix 3, Paragraph 2.2.2, and by the acceleration period,
expressed in ms.
3. FEMUR ACCEPTABILITY CRITERION (FAC)
This criterion is determined by the compression load expressed in kN, transmitted axially on
each femur of the manikin and measured according to Appendix 3, Paragraph 2.2.3., and by
the duration of the compression load, expressed in ms.





1.4.2. The seat remains firmly held, even if one or more anchorages is (are) partly detached, and
all the locking systems remain locked during the whole duration of the test;
1.4.3. After the test no structural part of the seat or accessories has any fracture or sharp or
pointed edges or corners likely to cause any bodily injury.
2. STATIC TESTS
2.1. Test Apparatus
2.1.1. This consists of cylindrical surfaces with a radius of curvature equal to 82 ± 3 mm and a
width:
2.1.1.1. At least equal to the width of the seat-back of each seating position of the seat to be tested
for the upper form,
2.1.1.2. Equal to 320 -0/+10 mm for the lower form as shown in Figure l of this Appendix.
2.1.2. The surface resting against the parts of the seat shall be made of a material the hardness of
which is not less than 80 Shore A.
2.1.3. Each cylindrical surface shall be equipped with at least one force transducer able to measure
the forces applied in the direction defined in Paragraph 2.2.1.1.
2.2.
Test Procedure
2.2.1.
1 000
A test force to ± 50 N shall be applied using a device,
H1
conforming to Paragraph 2.1. above, to the rear part of the seat corresponding to each
seating position of the seat.
2.2.1.1. The direction of application of the force shall be situated in the vertical median plane of the
seating position concerned; it shall be horizontal and from the rear towards the front of the
seat.
2.2.1.2. This direction shall be situated at the height H1 which shall be between 0.70 m and 0.80 m
and above the reference plane. The exact height shall be determined by the manufacturer.
2 000
2.2.2. A test force equal to
H2
± 100 N shall be applied
simultaneously to the rear part of the seat corresponding to each seating position of the seat
in the same vertical plane and in the same direction at the height H2 which shall be between
0.45 and 0.55 m above the reference plane, with a device conforming to Paragraph 2.1.
above. The exact height shall be determined by the manufacturer.
2.2.3. The test form shall be maintained as far as possible in contact with the rear of the seat
during the application of the forces specified in Paragraphs 2.2.1 and 2.2.2. above. They
shall be able to pivot in a horizontal plane.
2.2.4. Where a seat consists of more than one seating position, the forces corresponding to each
seating position shall be applied simultaneously and there shall be as many upper and lower
forms as seating positions.

APPENDIX 5 - FIGURE 1
STATIC TEST APPARATUS

ANNEX 1
(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 seat type or types with regard to its (their) strength pursuant to Regulation No. 80
Approval No................................. Extension No. ..................................
1. Trade name or mark of the seat:...........................................................................................................
2. Seat Type: .............................................................................................................................................
3. Manufacturer's name and address:.......................................................................................................
4. If applicable, name and address of the manufacturer's representative: ...............................................
5. Additional information:...........................................................................................................................
5.1. Brief description of the seat type, its attachment fittings and its adjustment, displacement and
locking systems including the minimum distance between fitting points: .............................................
5.2. Position and arrangement of seats: ......................................................................................................
5.3. Seats, if any, which incorporate a safety belt anchorage:.....................................................................
5.4. Energy absorption test of the rear part of the seat-back: yes/no : .....................................................
5.5. Drawings showing the area of the rear part of the seat-back verified for energy dissipation: ..............

ANNEX 2
(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 type of: vehicle with regard to the strength of the seat anchorages pursuant to Regulation No. 80
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. Additional information:...........................................................................................................................
5.1. Brief description of the vehicle type according to its anchorages and minimum value of the distance
between the anchorages:......................................................................................................................
5.2. Make and type of type approved seats (if any): ....................................................................................
5.3. For each row of seats: individual/bench, fixed/adjustable, fixed back/adjustable back, tipping
back/inclining back : ...........................................................................................................................
5.4. Position and arrangement of seats (type approved seats and other seats): ........................................
5.5. Seats, if any, which incorporate a safety belt anchorage:.....................................................................

ANNEX 3
ARRANGEMENTS OF APPROVAL MARKS
1. Arrangement in the approval mark for a seat
a = 8 mm min
The above approval mark affixed to a seat shows that the seat type concerned has, with regard to the
strength of the seats, been approved in the Netherlands (E4) under number 012439. The approval
number indicates that the approval was granted in accordance with the requirements of Regulation No.
80 as amended by the 01 series of amendments.
2. Arrangement of the approval mark for a vehicle type
a = 8 mm min
The above approval mark, affixed to a vehicle, shows that this type of vehicle has been approved in the
Netherlands (E4) under number 012439 with regard to the strength of the anchorages on the vehicle.
The approval number indicates that the approval was granted in accordance with the requirements of
Regulation No. 80 as amended by the 01 series of amendments.

2.8. "Centreplane of occupant" (C/LO) means the median plane of the 3 DH 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 of 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 DH machine as the right foot is to the right. The spirit level verifying the transverse
orientation of the 3 DH 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 DH machine;
4.9. Tilt the back pan forward against the forward stop and draw the 3 DH machine away from the
seat-back using the T-bar. Reposition the 3 DH machine on the seat by one of the following
methods:
4.9.1. If the 3 DH machine tends to slide rearward, use the following procedure. Allow the 3 DH
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 DH machine does not tend to slide rearward, use the following procedure. Slide the
3 DH 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 DH 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 DH machine from sliding forward;
4.11. Install the right and left buttock weights and then, alternately the eight torso weights. Maintain
the 3 DH machine level;

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 DH
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 front row, the driver's seat;
4.16.2. In the case of the rear row or rows, an outer seat.

ANNEX 8 - APPENDIX 1
Dimensions in mm
Figure 1
3 DH Machine Elements Designation

ANNEX 8 - 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.

Seat and Seat Anchorage Strength - Large Passenger Vehicles.