Regulation No. 111-00

Name:Regulation No. 111-00
Description:Rollover Stability - Tank Vehicles Class N and O.
Official Title:Uniform Provisions Concerning the Approval of: Tank Vehicles of Categories N and O with Regard to Rollover Stability.
Country:ECE - United Nations
Date of Issue:2000-12-28
Amendment Level:00 Series, Supplement 1 (Including Erratum)
Number of Pages:24
Vehicle Types:Heavy Truck, Trailer
Subject Categories:Miscellaneous
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Keywords:

vehicle, approval, regulation, axle, test, mass, type, maximum, roll, tilt, tank, stiffness, table, bogie, suspension, lateral, paragraph, calculation, angle, centre, annex, wheel, stability, rollover, load, height, axles, granted, condition, manufacturer, gravity, fluid, means, case, number, width, production, acceleration, tyres, tests, approved, mark, agreement, substitute, conditions, trailer, regard, track, vehicles, form

Text Extract:

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E/ECE/324 )
E/ECE/TRANS/505 ) Rev.2/Add.110/Corr.1
September 30, 2009
STATUS OF UNITED NATIONS REGULATION
ECE 111
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
TANK VEHICLES OF CATEGORIES N AND O WITH
REGARD TO ROLLOVER STABILITY
Incorporating:
00 series of amendments
Date of Entry into Force: 28.12.00
Supplement 1 to the 00 series of amendments including Erratum
Date of Entry into Force: 04.04.05

Regulation No. 111
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF TANK VEHICLES
OF CATEGORIES N AND O WITH REGARD TO ROLLOVER STABILITY
CONTENTS
REGULATION
1. Scope
2. Definitions
3. Application for approval
4. Approval
5. Specifications and tests
6. Modification of the vehicle type and extension of approval
7. Conformity of production
8. Penalties for non-conformity of production
9. Production definitely discontinued
10. Names and addresses of technical services responsible for conducting approval tests, and of
administrative departments
ANNEXES
Annex 1 − Communication concerning the approval or extension or refusal or withdrawal of approval or
production definitely discontinued of a vehicle type with regard to static/steady-state rollover
stability pursuant to Regulation No. 111
Annex 2 − Arrangement of the approval mark
Annex 3 − Tilt table test procedure
Annex 4 − Lateral stability calculation
Appendix
− Calculation report

2.7. "Rollover threshold" means the instant when all the wheels of one side of a vehicle have
lost contact with the supporting surface (tilt table platform).
2.7.1. The inclination angle of the tilt table surface is represented by the Symbol "β".
3. APPLICATION FOR APPROVAL
3.1. The application for approval of a vehicle type with regard to rollover stability shall be
submitted by the vehicle manufacturer or by his duly accredited representative.
3.2. A detailed description of the vehicle type with regard to the items specified in Paragraph 2.2
above. The numbers and/or symbols identifying the vehicle type shall be specified;
3.2.2. Photographs and/or diagrams and drawings of the vehicle showing the vehicle type in front,
side, and rear elevation;
3.2.3. Particulars of the vehicle's mass as defined by Paragraph 2.4 above.
3.3. A vehicle, representative of the vehicle type to be approved, shall be submitted to the
Technical Service conducting the approval tests.
4. APPROVAL
4.1. If the vehicle type submitted for approval pursuant to this Regulation meets the
requirements of Paragraph 5 below, approval of that vehicle type shall be granted.
4.2. An approval number shall be assigned to each type approved. Its first two digits (currently
00 for the Regulation in its original form) 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
approval number to another vehicle type.
4.3. Notice of approval or of extension or of refusal or of approval withdrawn or of production
definitely discontinued of a vehicle type pursuant to this Regulation shall be communicated
by the Parties to the Agreement applying this Regulation by means of a form conforming to
the model in Annex i to this Regulation together with photographs and/or diagrams and
drawings supplied by the applicant for approval, in a format not exceeding
A4 (210 x 297 mm) or folded to that format and on an appropriate scale.

5.3. Stability Criteria
5.3.1. The criteria, using the corresponding Annex (3 or 4) to this Regulation, must fulfil one of the
following conditions, subject to Paragraph 5.1.2:
5.3.1.1. Tilt Table Test:
The static rollover stability of the vehicle shall be such that the point at which overturning
occurs would not be passed if a tilt table angle of β = 23° has been reached for all tests in
both tilt directions.
If the vehicle fails in one of the three tests for a specific direction (right or left), it is allowed
to do one consecutive (re)test.
5.3.1.2. Calculation Method:
The rollover stability of the vehicle shall be such that the point at which overturning occurs
would not be passed if a lateral acceleration of 4 m/s has been reached.
5.4. Particular Requirements
No contact between parts of the vehicle shall occur which are not intended to come into
contact during normal use.
6. MODIFICATION OF THE VEHICLE TYPE AND EXTENSION OF APPROVAL
6.1. Every modification which affects the vehicle type as defined in Paragraph 2.2 above (for
instance the chassis, body, suspension, axle configuration, etc.) shall be notified to the
administrative department which approved the vehicle type. The department may then
either:
6.1.1. 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
6.1.2. Require a further test report from the Technical Service responsible for conducting the tests.
6.2. Confirmation or refusal of approval, specifying the alterations, shall be communicated by the
procedure specified in Paragraph 4.3 above to the Contracting Parties to the Agreement
which apply this Regulation.
6.3. The competent authority issuing an extension of approval shall assign a series number to
each communication form drawn up for such an extension and inform thereof the other
Contracting Parties to the 1958 Agreement by means of a communication form conforming
to the model in Annex 2 to this Regulation.

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 static/steady-state rollover stability pursuant to Regulation No. 111.
Approval No......................................... Extension No. ................................
1. Trade name or mark of the vehicle: ................................................................................................
2. Vehicle category: N / N / O / O
3. Vehicle type:....................................................................................................................................
3.1. Chassis; make, model, type:...........................................................................................................
3.2. Tank; make, model, effective volume: ............................................................................................
3.3. Monocoque tank construction: Yes/No
4. Manufacturer's name and address:.................................................................................................
........................................................................................................................................................
5. If applicable, name and address of manufacturer's representative: ...............................................
........................................................................................................................................................
6. Mass of vehicle: ..............................................................................................................................
6.1. Maximum mass of vehicle:..............................................................................................................
6.2. Mass of vehicle in running order: ....................................................................................................

12. Vehicle submitted for approval on:..................................................................................................
13. Technical service responsible for conducting approval tests:.........................................................
14. Date of report issued by that service: .............................................................................................
15. Number of report issued by that service: ........................................................................................
16. Tilt table test/calculation method.
17. Approval granted/refused/extended/withdrawn.
18. Position of approval mark on the vehicle: .......................................................................................
19. Place: ..............................................................................................................................................
20. Date:................................................................................................................................................
21. Signature.........................................................................................................................................
22. The list of documents deposited with the Administrative Service which has granted approval is
annexed to this communication and may be obtained on request.

ANNEX 3
TILT TABLE TEST PROCEDURE
1. DEFINITIONS
For the purposes of this test:
"Rollover threshold" means the instant when all the wheels on one side of the vehicle have
lost contact with the tilt table surface.
2. GENERAL CONDITIONS
2.1. The Tilt Table
A rigid surface should be used. The tyres may rest against a safety block or step during the
test to prevent sideways slipping, provided that the safety block does not influence the test
result.
2.2. Wind Conditions
2.3. Tyres
If the tilt table test rig is placed outside, the lateral wind velocity shall not exceed 3 m/s and the
total wind velocity shall not exceed 5 m/s.
The tyres shall be inflated to pressures as specified by the vehicle manufacturer for the test
vehicle at the laden condition. The tolerance for the inflation pressure in a cold state is
± two %.
2.4. Operating Components
2.4.1. All operating components likely to influence the results of this test (e.g. condition and setting of
springs and other suspension components and suspension geometry) shall be as specified by
the manufacturer.
2.4.2. Height-levelling systems should be deactivated (held at static values) during the actual tilt to
avoid inflation/deflation of suspension during the tilt. Cross-coupling from side to side may
need to be deactivated. An exception can be made for levelling systems with very short
response time of less than one second.
3. MEASURING ACCURACY
3.1. The tilt table angle shall be measured with an accuracy of better than 0.3°.

7.2. Without prejudice to Paragraph 5, if the vehicle fails to achieve the minimum tilt table angle
specified in Paragraph 5.3.1.1. when tested with a partially filled tank in the maximum mass
condition then, subject to the agreement of the type approval authority and appropriate safety
considerations being taken into account, the manufacturer or applicant may request that a
further test be undertaken with alternative loading conditions as described in Paragraphs 7.2.1
and 7.2.2. Where the vehicle manufacturer or applicant chooses not to test in accordance with
the alternative loading conditions in Paragraphs 7.2.1 and 7.2.2, the first test result will
constitute the final result.
7.2.1. The first alternative condition is the vehicle loaded to its maximum mass and with the tank fully
or partially filled with a fluid for which the tank is designed to carry in normal use.
7.2.2. The second alternative condition is the vehicle loaded in excess of its normal maximum mass
and with the tank fully filled with a substitute fluid.
7.2.3. If the tank vehicle manufacturer does not agree with overloading required for additional test, the
vehicle is considered as not having passed the test.
7.3. In the case where the vehicle is tested in the fully filled condition, the recorded values of the
test tilt table inclination angle β shall be corrected using the following formulae:
tan β
= tan β
×
A
A
× H
× H
+
T
2H

⎜1


A
A



The value of β shall be higher than, or equal to, the minimum rollover threshold inclination
angle required by this Regulation (β ).
In the formulae:
A
A
= vehicle mass in case of loading by normal fluid;
= vehicle mass in case of loading by a substitute fluid.
A = A + V ×
( ρ − ρ )
H , H = height of the vehicle centre of gravity in case of loading with normal fluid and a
substitute fluid, respectively;
H
= H
− V
×
( ρ − ρ ) / C
T
β
β
= theoretical wheel track at the vehicle cross section at the centre-of-gravity point;
= corrected tilt table inclination angle for the fluid which the vehicle is intended to
carry;
= the recorded tilt table inclination angle achieved using the substitute fluid;

ANNEX 4
LATERAL STABILITY CALCULATION
1. GENERAL
The lateral stability of tank vehicles is calculated by simulation of a steady state circular test
(constant radius, constant speed and consequently constant lateral acceleration). The
calculation method take into account the main factors which influence the stability, such as the
height of the centre of gravity, the track width and all factors which result in a lateral shift of the
centre of gravity (axle roll stiffness, suspension roll stiffness, etc.). In case of semi-trailers the
tractor will be simulated with a reference kingpin roll stiffness.
The specifications of the calculation method are:
1.
axle roll centre is at ground level;
2.
vehicle structure is assumed to be rigid;
3.
vehicle is symmetrical about its centreline;
4.
tyre and suspension deflections are linear;
5.
lateral deflection of suspensions is zero.
2. DEFINITIONS
For the purposes of this calculation:
"Bogie" means an axle group with compensatory load distribution, in which zero load is
attained on all wheels on a given side simultaneously.

Figure 1
Cross-section of a Tank vehicle

7.1.2. Axles/bogie with twin tyres:
theoretical track width for twin tyres:
T = T +
MA
axle/bogie roll stiffness:
C
F
=
× T
2
equivalent suspension roll stiffness ground level:
C
= C
⎡ H ⎤
× ⎢H
m⎥ ⎣ − ⎦
combined roll stiffness to simulate lateral CG shift:
C
C
=
C
× C
+ C
vehicle pseudo roll angle at wheel lift:
θ
=
A × T
2 × C
7.2. In case of semi-trailers separated from tractors, kingpin effects are calculated by using the
following formula:
Kingpin trace width:
T
=

n
T
The kingpin roll stiffness, which is the roll stiffness of the tractor at the longitudinal position of
the fifth wheel/kingpin, will be calculated by using a reference load dependent roll stiffness
factor of 4 kN-m/rad:
C = A ×
4

7.5. Lateral Stability Calculation
7.5.1. The effective mass factor of the stiffest axle/bogie F :
C
F =
C
7.5.2. The lateral acceleration at first wheel lift q :
q
=

2 × ⎢
⎢⎣
( F × A × H )
A × T
+
C
(( A − U ) × F × H ) ⎤

− ( A × F × H ) ⎥⎦ 7.5.3. The maximum optimal theoretical lateral acceleration at overturn q :
q
=

2 × ⎢
⎢⎣
( A × H )
A × T
+
C
(( A − U ) × H ) ⎤

− ( A × H ) ⎥⎦ 7.5.4. Linear interpolation between the lateral acceleration at first wheel lift and the maximum
theoretical lateral acceleration gives the correlated lateral acceleration at overturn q :
( q − q )
q = q − ×
A
A

Rollover Stability - Tank Vehicles Class N and O.