Railway applications - Rolling stock - Head stock layout

This European Standard is valid for vehicles equipped with buffers and screw coupling systems.
In order to allow operation and coupling of trainsets or vehicles, this European Standard specifies the defined free space for the shunter called the "Berne rectangle" and the necessary free space for the installation of the rescue coupler.
This European Standard specifies the location, fixing and free spaces on the headstock of:
-   buffers;
-   screw coupling systems;
-   end cocks;
-   pneumatic half couplings;
-   connections for electric cables.
It also specifies the calculation of the width of the buffer heads.
Unless otherwise displayed, all dimensions given in this European Standard are nominal values.

Bahnanwendungen - Schienenfahrzeuge - Anordnung der Bauteile am Kopfstück

Dieses Dokument gilt für mit Puffern und Schraubenkupplungssystemen ausgestattete Schienenfahrzeuge.
Um den Betrieb und das Kuppeln von Triebzügen oder Fahrzeugen zu ermöglichen, legt dieses Dokument den definierten freizuhaltenden Raum für den Rangierer, bezeichnet als „Berner Raum“, sowie den erforderlichen freizuhaltenden Raum für die Befestigung der Abschleppkupplung fest.
Dieses Dokument legt die Position, die Befestigung und die freizuhaltenden Räume am Kopfstück fest von:
-   Puffern;
-   Schraubenkupplungssystemen;
-   Luftabsperrhähnen;
-   Bremskupplungen;
-   Anschlüssen für elektrische Kabel.
Sie legt auch die Berechnung der Breite der Pufferteller fest.
Sofern nicht anderweitig angegeben, sind alle in diesem Dokument Norm angegebenen Maße Nennwerte.

Applications ferroviaires - Matériel roulant ferroviaires - Agencement de la traverse de tête

Le présent document est valide pour des véhicules ferroviaires équipés de tampons et de systèmes d'attelage.
Afin de permettre l'utilisation et l'attelage des rames automotrices ou des véhicules, le présent document spécifie l'espace libre défini pour l'agent de manœuvre, appelé « rectangle de Berne », et l'espace libre nécessaire pour l'installation de l'attelage de secours.
Le présent document spécifie l'emplacement, la fixation et les espaces libres des éléments suivants sur la traverse de tête :
-   tampons ;
-   systèmes d'attelage ;
-   robinets d'extrémité ;
-   demi-accouplements pneumatiques ;
-   raccordements des câbles électriques.
Elle spécifie également les calculs de largeur des plateaux de tampons.
Sauf indication contraire, toutes les dimensions figurant dans le présent document sont des valeurs nominales.

Železniške naprave - Vozna sredstva - Postavitev glavnega parka

Ta evropski standard se uporablja za vozila, opremljena z odbojniki in sistemi vijačnih spenjač.
Da bi omogočili delovanje in spenjanje vlakovnih kompozicij ali vozil, ta evropski standard določa zahtevani razmik za preklopnik, imenovan »bernski pravokotnik«, in potreben razmik za namestitev vlečne spenjače.
Ta evropski standard določa lokacijo, pritrditev in potreben razmik naslednjih elementov glavnega parka:
–   odbojnikov;
–   sistemov vijačnih spenjač;
–   zapornih pip;
–   pnevmatskih polspenjač;
–   priključkov za električne kable.
Določa tudi izračun širine glav odbojnikov.
Če ni drugače navedeno, so vse dimenzije, navedene v tem evropskem standardu, nominalne vrednosti.

General Information

Status
Published
Public Enquiry End Date
30-Nov-2020
Publication Date
07-Sep-2022
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
08-Sep-2022
Due Date
13-Nov-2022
Completion Date
08-Sep-2022

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SLOVENSKI STANDARD
SIST EN 16839:2022
01-november-2022
Nadomešča:
SIST EN 16839:2017
Železniške naprave - Vozna sredstva - Postavitev glavnega parka
Railway applications - Rolling stock - Head stock layout
Bahnanwendungen - Schienenfahrzeuge - Anordnung der Bauteile am Kopfstück
Applications ferroviaires - Matériel roulant ferroviaires - Agencement de la traverse de
tête
Ta slovenski standard je istoveten z: EN 16839:2022
ICS:
45.040 Materiali in deli za železniško Materials and components
tehniko for railway engineering
SIST EN 16839:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 16839:2022

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SIST EN 16839:2022


EN 16839
EUROPEAN STANDARD

NORME EUROPÉENNE

August 2022
EUROPÄISCHE NORM
ICS 45.040 Supersedes EN 16839:2017
English Version

Railway applications - Rolling stock - Head stock layout
Applications ferroviaires - Matériel roulant ferroviaires Bahnanwendungen - Schienenfahrzeuge - Anordnung
- Agencement de la traverse de tête der Bauteile am Kopfstück
This European Standard was approved by CEN on 10 July 2022.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 16839:2022 E
worldwide for CEN national Members.

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SIST EN 16839:2022
EN 16839:2022 (E)
Contents Page

European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Free spaces . 7
4.1 General . 7
4.2 Berne rectangle . 9
4.3 Free spaces for coupling of coaches . 9
4.4 Climb protection . 10
5 Buffers . 10
5.1 General . 10
5.2 Position of buffers on the headstock . 10
5.2.1 Distance between buffers . 10
5.2.2 Height of buffers above top of the rail . 10
5.3 Buffer fixing . 11
5.3.1 Vehicles without crashworthy buffer systems . 11
5.3.2 Vehicles with crashworthy buffer systems . 12
5.4 Interaction coupling/buffer . 13
5.4.1 General . 13
5.4.2 Mounting of buffers . 13
5.5 Requirements to avoid buffer locking . 14
5.5.1 Boundary dimensions . 14
5.5.2 Calculation of width of buffer heads . 16
5.5.3 Verification . 17
6 Screw coupling . 17
6.1 General . 17
6.2 Position of draw gear on the headstock . 18
6.2.1 Height of the draw gear above top of the rail . 18
6.2.2 Position of the device to hang the screw coupler when not in use . 18
6.3 Clearances around the draw hook . 18
6.4 Draw gear fixing . 20
7 Brake pipe connections . 21
8 Pneumatic half couplings . 22
9 Electrical connections . 23
9.1 General . 23
9.2 Electrical power supply connection . 24
9.3 Electro pneumatic brake connection (EP-brake) . 25
Annex A (normative) Calculation of the width of buffer heads . 28
A.1 General . 28
A.1.1 Introduction . 28
A.1.2 Comments on the preparation of the formulae in this annex . 28
2

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SIST EN 16839:2022
EN 16839:2022 (E)
A.1.3 Track . 28
A.1.4 Vehicle . 29
A.2 Data used in the calculation . 29
A.3 Calculation . 29
A.4 Return Value . 30
Annex B (normative) Validation of the calculated width of buffer heads by drawing
methodology . 31
B.1 General . 31
B.2 Methods . 31
B.2.1 General . 31
B.2.2 Drawing method . 34
B.2.3 Simulation method . 34
Annex C (informative) Example of location of rest for uncoupled half couplings . 35
Annex D (normative) Special national conditions . 38
Annex E (informative) Examples for permissible arrangement of brake pipe connections . 39
Annex F (normative) Calculation of space for shunter (Berne Rectangle) in curves when
using screw couplings . 49
Annex ZA (informative) Relationship between this European Standard and the Essential
requirements of EU Directive 2016/797/EC aimed to be covered . 51
Bibliography . 53


3

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SIST EN 16839:2022
EN 16839:2022 (E)
European foreword
This document (EN 16839:2022) has been prepared by Technical Committee CEN/TC 256 “Railway
applications”, the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by February 2023, and conflicting national standards
shall be withdrawn at the latest by February 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 16839:2017.
United Kingdom has a national deviation, which is included in Annex D.
The main changes resulting from this document will be incorporated as modifications to
EN 16839:2017:
a) Adaptation of the document with regard to overlapping contents to EN 15551 and EN 15566;
b) Revision of Figure 1 – Free spaces;
c) Revision of Figure 3 – Buffer and drilling template for wagon;
d) Revision of Figure 7 in 6.3 “Clearances around the draw hook” with consideration of the necessary
clearance for mounting the rescue coupler on locomotives;
e) Complete revision of Clause 9 “Electrical connections” including the figures;
f) New Annex F “Calculation of space for shunter (Berne Rectangle) in curves when using screw
couplings” – adopted from EN 16116-2;
g) Adaptation of Annex ZA to EU Directive 2016/797/EC;
h) Adaptation of normative references and editorial revision.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s) / Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral
part of this document.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
4

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SIST EN 16839:2022
EN 16839:2022 (E)
1 Scope
This document is applicable to vehicles equipped with buffers and screw coupling systems.
In order to allow operation and coupling of trainsets or vehicles, this document specifies the defined
free space for the shunter called the “Berne rectangle” and the necessary free space for the installation
of the rescue coupler.
This document specifies the location, fixing, and free spaces on the headstock of:
— buffers;
— screw coupling systems;
— end cocks;
— pneumatic half couplings;
— connections for electric cables.
It also specifies the calculation of the width of the buffer heads.
Unless otherwise displayed, all dimensions given in this document are nominal values.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 14601:2005+A2:2021, Railway applications - Straight and angled end cocks for brake pipe and main
reservoir pipe
EN 15020:2022, Railway applications — Rescue coupler — Performance requirements, specific interface
geometry and test methods
EN 15551:2022, Railway applications — Railway rolling stock —- Buffers
EN 15566:2022, Railway applications — Railway rolling stock — Draw gear and screw coupling
EN 15807:2021, Railway applications - Pneumatic half couplings
EN 15877-1:2012+A1:2018, Railway applications - Marking on railway vehicles - Part 1: Freight wagons
EN 16286-1:2013, Railway applications - Gangway systems between vehicles - Part 1: Main applications
1
EN 60529:1991, Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989)
2
ISO 3864 (all parts), Graphical symbols — Safety colours and safety signs

1 Document impacted by EN 60529:1991/A1:2000, EN 60529:1991/A2:2013 and EN 60529:1991/A2:2013/COR1:2019.

2
 Consists of the following parts: ISO 3864-1:2011, Graphical symbols — Safety colours and safety signs — Part 1:
Design principles for safety signs and safety markings; ISO 3864-2:2016, Graphical symbols — Safety colours and
safety signs — Part 2: Design principles for product safety labels; ISO 3864-3:2012, Graphical symbols — Safety
colours and safety signs — Part 3: Design principles for graphical symbols for use in safety signs ISO 3864-4:2011,
5

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SIST EN 16839:2022
EN 16839:2022 (E)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 14601:2005+A2:2016,
EN 15551:2022, EN 15566:2022, EN 15807:2021 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1
Berne rectangle
defined free space which is needed to ensure safe working conditions for the shunting staff during
coupling and uncoupling of screw couplings
3.2
clearance
area needed for mounting and functional use of moveable parts
EXAMPLE Adapters, cables, etc are moveable parts.
Note 1 to entry: For definition of “running surface” see EN 13848-1:2019, 3.4
3.3
contact plane of buffers
buffing plane
plane tangent to buffing surfaces of both buffer heads at the end of the vehicle perpendicular to running
surface
Note 1 to entry: See EN 13848-1:2019, 3.1.4 and 4.1.
Note 2 to entry: “Running surface” sometimes also named as “Top of Rail (TOR)”.
3.4
free space
area free of equipment needed for occupational safety
EXAMPLE free space for coupling process and/or ergonomic (e.g. handrails, cocks)

Graphical symbols — Safety colours and safety signs — Part 4: Colorimetric and photometric properties of safety sign
materials (Part 4 not relevant for this standard).
6

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SIST EN 16839:2022
EN 16839:2022 (E)
3.5
headstock
part of the underframe with a vertical reference plane at the ends of the vehicle where the buffers are
fixed
Note 1 to entry: Headstock includes the part where draw gear is fixed.
3.6
guidance device for draw hook
device to guide and support the draw hook
3.7
shunter
member of staff who couples and uncouples railway vehicles
3.8
symmetrical buffer
buffer, wherein the buffer head is, regardless of its contour geometry, mounted on its width dimension
symmetrically to the centre-line of the buffer housing or to the predetermined nominal position of the
buffer centre-line
4 Free spaces
4.1 General
To ensure safe working conditions and also for easy operation for the shunters during coupling and
uncoupling, it is necessary to define required free spaces.
With the exception of the shunter's handrails there shall be no devices under the buffers that limit the
shunter's access for coupling operations.
Flexible connecting cables and flexible parts of hoses may penetrate these spaces.
The flexible parts of gangways according to EN 16286-1:2013 may infringe the Berne rectangle.
For assessment of free spaces, the coupling gear components shall be positioned on the centre-line of
the vehicle.
7

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SIST EN 16839:2022
EN 16839:2022 (E)
Dimension in millimetres

Key
1 free space for the shunter (Berne rectangle)
2 free space above running surface without moveable parts (e.g. couplers, pipes)
3 running surface
4 lower edge of buffer head
5 contact plane of fully elastic compressed buffers
6 free spaces, free of fixed devices behind the buffer head above its lower edge
Figure 1 — Free spaces
NOTE Steps and handrails are not part of this document. The dimensions of the shunter steps and handrails
and the free spaces around these arrangements are given in EN 16116-1:2022 and EN 16116-2:2020.
8

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SIST EN 16839:2022
EN 16839:2022 (E)
4.2 Berne rectangle
The free space for shunters during coupling is called “Berne rectangle”.
Vehicles shall be designed so that staffs are not exposed to undue risk during coupling and uncoupling.
If screw couplers and side buffers are used, the required spaces shown in Figure 1 shall be free of fixed
parts.
Flexible connecting cables and flexible hoses may be inside this space. With exception of the shunter
handrails there shall be no devices under the buffers that hinder the access to the space.
For the verification of the necessary spaces (Berne rectangle) for the coupler in S-curves, see Annex F.
4.3 Free spaces for coupling of coaches
See free spaces from 4.1 and Figure 2.
The limit of the securing devices for the gangway side plate (if fitted) shall be located at a minimum
distance of 495 mm from the vehicle longitudinal centre-line.
Dimension in millimetres

Key
1 for the shunter (Berne rectangle)
2 not shown in this view (see Figure 1)
3 not shown in this view (see Figure 1)
4 not shown in this view (see Figure 1)
5 contact plane of fully elastic compressed buffers
6 free spaces, free of fixed devices behind the buffer head above its lower edge
7 free space for gangway side plate
Figure 2 — Free spaces for coupling coaches
9

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SIST EN 16839:2022
EN 16839:2022 (E)
4.4 Climb protection
On vehicles, where climb protection are used (mandatory for vehicles subjected to regulations for
dangerous goods), the climb protection shall not restrict the free spaces.
NOTE Information on climb protection on vehicles subjected to regulations for dangerous goods, is given in
TE 25 on RID.
5 Buffers
5.1 General
The following requirements apply to vehicles equipped at least at one end with two buffers according to
EN 15551:2022, fixed symmetrically to the longitudinal centre-line of the vehicle.
5.2 Position of buffers on the headstock
5.2.1 Distance between buffers
The standard distance between buffer centre-lines shall be nominally according to Table 1.
Table 1 —Track gauge and distance between buffer centre-lines
Track gauge Distance between buffer centre-lines
mm mm
1 435 1 750 ± 10
Interchangeable 1 435/1 524 1 790 ± 10
Interchangeable 1 435/1 600 1 905 ± 3
Interchangeable 1 435/1 668 1 850 ± 10
1 524 1 830 ± 10
1 600 1 905 ± 3
1 668 1 850 ± 10
It is permitted for dual gauge units (interchangeable wheelsets) intended for running between standard
gauge network 1 435 mm and broad-gauge networks to have a different value of the distance between
buffer centre-lines (e.g. One 850 mm), provided that full compatibility with buffers for standard
1 435 mm gauge is ensured.
Buffers shall be sized so that in horizontal curves and reverse curves, it is not possible for vehicles to
lock buffers. The minimum horizontal overlap between buffer heads in contact shall be 25 mm.
5.2.2 Height of buffers above top of the rail
The height b of the centre-line of the buffers to the top of the rail shall be in all loading and wear
conditions in accordance with Table 2.
Table 2 —Height of buffers above top of the rail
Type b
mm
Locomotive 940 mm to 1 065 mm
Coach 980 mm to 1 065 mm
Freight wagon and car carrier 940 mm to 1 065 mm
10

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SIST EN 16839:2022
EN 16839:2022 (E)
5.3 Buffer fixing
5.3.1 Vehicles without crashworthy buffer systems
The buffers shall be attached to the vehicle headstock.
The screws shall be M 24, grade 8.8, and self-locking nuts, grade 8, shall be used. The screws shall have
a threaded projection of at least three threads.
The recommended tightening torque should be 690 Nm.
For wagons, distance between holes shall be in accordance with Figure 3.
For wagons fitted with 150 mm stroke buffers, pins in the headstock, which indicate that this kind of
buffer shall be used, shall be located at the right side of each buffer (looking at the buffer head) as
shown in Figure 3, item 1, Section A – A. The protrusion of the pin shall be at least 20 mm.
NOTE To help identify buffers with different strokes, buffers with 150 mm stroke have an opening at their
right side, while buffers with 105 mm stroke do not have this opening.
The hole spacing (280 × 160) mm for freight wagons should also be used for coaches, vans and
locomotives.
11

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SIST EN 16839:2022
EN 16839:2022 (E)
Dimension in millimetres

Key
1 pin only for buffer with 150 mm stroke
2 centre-line of the vehicle.
a distance from buffer centre-line to buffer centre-line (see Table 1)
* magnified section
Figure 3 — Buffer and drilling template for wagon
5.3.2 Vehicles with crashworthy buffer systems
Vehicles that use crashworthy buffers or buffers which form part of a combined system consisting of a
special buffer and a deformation element may have a different mounting configuration (e.g. position of
flange, thread diameter, number of screws and their position).
NOTE These vehicles are locomotives, driving trailers or coaches according to EN 15227:2020 or tank
wagons according to the Regulations concerning the International Carriage of Dangerous Goods by Rail (RID).
The marking for wagons fitted with crashworthy buffer systems shall be according to
EN 15877-1:2012+A1:2018.
12

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SIST EN 16839:2022
EN 16839:2022 (E)
5.4 Interaction coupling/buffer
5.4.1 General
To ensure that the train is able to negotiate horizontal curves of 150 m radius safely, the static
characteristics of draw gear and buffers shall be coordinated.
A guideline value of 250 kN should not be exceeded for the compression force of a pair of buffers in
contact on a horizontal curve of 150 m.
Unless otherwise specified in the technical specification, the stiffest static characteristics of the buffer
and draw gear combined together with the static test methods according to EN 15566:2022 and
EN 15551:2022 are to apply for evidence of buffer compression force.
The age of elastic elements in operational service should also be taken into account.
Conformity to these requirements may be assessed by calculation.
NOTE 1 The technical specification can define additional conditions for tested elastic devices, as for example
temperature range, which for static characteristics are to be taken into account.
NOTE 2 For new elastic devices, the available experience related assessed values may be applied.
To determine the compression force for vehicles, the calculation method shown under section 3 of
UIC B 36 RP 32 may be used (the method described in this report is also applicable for coaches and
locomotives). This calculation method may also allow to determine stress levels on smaller radius
curves. If the coupling practice creates pretension forces, these shall be taken into account.
NOTE 3 The calculation method on curves according to UIC B36 RP 32 also gives confidence for an S-curve of
150 m with an intermediate straight of 6 m.
NOTE 4 It is confirmed that pairings of different vehicle types / configurations need not to be analysed if each
vehicle complies with the 250 kN limit analysed for a pairing of same vehicle types.
5.4.2 Mounting of buffers
Two buffers with the same elastic system, category, head dimension, stroke and type of housing shall be
fitted at each vehicle end. The nominal length of the buffers on each side shall be the same.
Housings which differ only in the buffer head material (steel or non-metallic insert) are considered to
be identical.
When a non-metallic insert or non-metallic head is provided on one of the two buffers per vehicle end, it
shall be placed diagonally according to Figure 4.
13

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SIST EN 16839:2022
EN 16839:2022 (E)

Key
1 buffer with metallic head
2 buffer with non-metallic insert or head
l , l buffer length at each vehicle end
1 2
Figure 4 — Mounting of buffers with non-metallic insert or head (top view)
5.5 Requirements to avoid buffer locking
5.5.1 Boundary dimensions
Buffer heads shall not exceed the limits shown in Figure 5:
— LINE 5 towards the outside, the limit of the construction gauge defined for the vehicle concerned;
— LINE 1 towards the vehicle centre-line:
— for wagons, a vertical line situated 600 mm from the vehicle centre-line
— for coaches, locomotives and “ontrackmachines”, a vertical line situated 540 mm from the
vehicle centre-line.
— The compliance with this limited value is one of the preconditions, that this space will be
...

SLOVENSKI STANDARD
oSIST prEN 16839:2020
01-november-2020
Železniške naprave - Vozna sredstva - Postavitev glavnega parka
Railway applications - Rolling stock - Head stock layout
Bahnanwendungen - Schienenfahrzeuge - Anordnung der Bauteile am Kopfstück
Applications ferroviaires - Matériel roulant ferroviaires - Agencement de la traverse de
tête
Ta slovenski standard je istoveten z: prEN 16839
ICS:
45.040 Materiali in deli za železniško Materials and components
tehniko for railway engineering
oSIST prEN 16839:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 16839:2020

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oSIST prEN 16839:2020


DRAFT
EUROPEAN STANDARD
prEN 16839
NORME EUROPÉENNE

EUROPÄISCHE NORM

September 2020
ICS 45.040 Will supersede EN 16839:2017
English Version

Railway applications - Rolling stock - Head stock layout
Applications ferroviaires - Matériel roulant ferroviaires Bahnanwendungen - Schienenfahrzeuge - Anordnung
- Agencement de la traverse de tête der Bauteile am Kopfstück
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 256.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

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© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 16839:2020 E
worldwide for CEN national Members.

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Contents Page
European foreword . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Free spaces . 8
4.1 General . 8
4.2 Berne rectangle . 10
4.3 Free spaces for coupling of coaches . 10
4.4 Climb protection . 11
5 Buffers . 11
5.1 General . 11
5.2 Position of buffers on the headstock . 11
5.3 Buffer fixing . 12
5.4 Interaction coupling/buffer . 14
5.5 Requirements to avoid buffer locking . 15
6 Screw coupling . 18
6.1 General . 18
6.2 Position of draw gear on the headstock . 19
6.3 Clearances around the draw hook . 19
6.4 Draw gear fixing . 21
7 Brake pipe connections . 21
8 Pneumatic half couplings . 23
9 Electrical connections . 24
Annex A (normative) Calculation of the width of buffer heads . 29
A.1 General . 29
A.2 Data used in the calculation . 30
A.3 Calculation . 30
A.4 Return Value . 31
Annex B (normative) Validation of the calculated width of buffer heads by drawing
methodology . 32
B.1 General . 32
B.2 Methods . 32
Annex C (informative) Example of location of rest for unplugged half couplings . 36
Annex D (normative) Special national conditions . 39
Annex E (informative) Examples for permissible arrangement of brake pipe connections . 40
Annex ZA (informative) Relationship between this European Standard and the Essential
requirements of EU Directive 2016/797/EC aimed to be covered . 50
Bibliography . 52
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Figures
Figure 1 — Free spaces . 9
Figure 2 — Free spaces for coupling coaches . 10
Figure 3 — Buffer and drilling template for wagon . 13
Figure 4 — Mounting of buffers with non-metallic insert or head (top view) . 15
Figure 5 — Boundary dimensions and minimum surface of buffer heads . 16
Figure 6 — Relative position between buffers and draw hook . 19
Figure 7 — Clearances around the draw hook . 20
Figure 8 — For information interface of rescue coupler (example) and free spaces . 21
Figure 9 — End cock arrangement - 3D-View (example) . 22
Figure 10 — End cock arrangement (example) . 23
Figure 11 — Electrical connections. 24
Figure 12 — Electrical power supply connection . 25
Figure 13 — Electrical connection . 26
Figure 14 — Electro pneumatic brake connection (EP-brake). 28
Figure B.1 — The positions of the bogie vehicles in the track . 33
Figure B.2 — The positions of the other vehicles (non-bogie vehicles) in the track . 34
Figure B.3 — Buffer head interaction ― Drawing method (example) . 35
Figure C.1 — Location of rest for unplugged half coupling for brake pipe and main reservoir pipe . 36
Figure C.2 — Details of rest (Figure C.1, Item 3) – example . 37
Figure C.3 — Example of a device for receiving a half coupling in uncoupled condition . 38
Figure E.1 — Permissible arrangement only for vehicles (coaches, vans, freight wagons) fitted at
1.1.1969 with a continuous brake . 41
Figure E.2 — Permissible arrangement only for vehicles (coaches, vans, freight wagons) fitted at
1.1.1969 with a continuous brake or only a train pipe . 42
Figure E.3 — Permissible arrangement of air brake pipe connections for freight wagons . 43
Figure E.5 — Obligatory arrangement only for vehicles (coaches, vans, wagons bearing the marks
S and SS) fitted at 1.1.1969 with a continuous brake . 45
Figure E.6 — Permissible arrangement only for vehicles (coaches) fitted at 1.1.1969 with a
continuous brake or only a train pipe . 46
Figure E.7 — Obligatory arrangement only for vehicles (freight wagons) fitted at 1.1.1969 with a
continuous brake with two cocks at each side . 47
Figure E.8 — Obligatory arrangement only for vehicles (freight wagons) fitted at 1.1.1969 with a
continuous brake with one cock at each side for wagons only . 48
Figure E.9 — Obligatory arrangement only for vehicles (freight wagons) equipped with a
continuous brake and where relevant a main feed pipe with a chassis prepared for
automatic couplers . 49

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Tables
Table 1 —Track gauge and distance between buffer centre-lines . 11
Table 2 —Height of buffers above top of the rail . 12
Table 3 — Standard widths of buffer heads for freight wagon. 17
Table 4 — Widths of buffer heads for coaches . 17
Table 5 — Vehicle specification and valid methodology . 18
Table 6 — Distances for the arrangement of cocks . 22
Table A.1 — Compensation value X and validation . 31
Table ZA.1— Correspondence between this European Standard, EU Regulation 321/2013 of the
Commission dated 13 March 2013 relative to the technical interoperability specification
relating to the sub-system “rolling stock – freight wagons” for rail systems in the European
Union (published in JOUE L 104, 12.04.2013, p.1) and Directive 2016/797/EC . 50
Table ZA.2 — Correspondence between this European Standard,, the Commission Regulation
n°1302/2014 of 18 November 2014 concerning the technical specification for
interoperability relating to the ‘rolling stock locomotives and passenger rolling stock’ of
the rail system in the European Union (published in the Official Journal L 356, 12.12.2014,
p.228) and Directive 2016/797/EC . 51

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European foreword
This document (prEN 16839:2020) has been prepared by Technical Committee CEN/TC 256 “Railway
applications”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 16839:2017.
This document has been prepared under a standardization request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of
EU Directive 2016/797/EC.
For relationship with EU Directive 2016/797/EC, see informative Annex ZA, which is an integral part of
this document.
Compared to EN 16839:2017, the following essential modifications are intended:
a) Adaptation of the document with regard to overlapping contents to EN 15551 and EN 15566;
b) Revision of Figure 1 – Free spaces;
c) Revision of Figure 3 – Buffer and drilling template for wagon;
d) Revision of Figure 7 in 6.3 "Clearances around the draw hook" with consideration of the necessary
clearance for mounting the rescue coupler on locomotives;
e) Adaptation of Annex ZA to EU Directive 2016/797/EC;
f) Adaptation of normative references and editorial revision.

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1 Scope
This document is valid for rail vehicles equipped with buffers and screw coupling systems.
In order to allow operation and coupling of trainsets or vehicles, this document specifies the defined
free space for the shunter called the “Berne rectangle” and the necessary free space for the installation
of the rescue coupler.
This document specifies the location, fixing, and free spaces on the headstock of:
— buffers;
— screw coupling systems;
— end cocks;
— pneumatic half couplings;
— connections for electric cables.
It also specifies the calculation of the width of the buffer heads.
Unless otherwise displayed, all dimensions given in this document are nominal values.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 13848-1:2003+A1:2008, Railway applications - Track - Track geometry quality - Part 1:
Characterisation of track geometry
EN 14601:2005+A1:2010, Railway applications - Straight and angled end cocks for brake pipe and main
reservoir pipe
prEN 15020:2019, Railway applications - Rescue coupler - Performance requirements, specific interface
geometry and test methods
prEN 15551:2019, Railway applications - Railway rolling stock - Buffers
prEN 15566:2019, Railway applications - Railway rolling stock - Draw gear and screw coupling
prEN 15807:2019, Railway applications - Pneumatic half couplings
EN 15877-1:2012+A1:2018, Railway applications - Marking on railway vehicles - Part 1: Freight wagons
EN 16286-1:2013, Railway applications - Gangway systems between vehicles - Part 1: Main applications
1)
EN 60529:1991 , Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989)
ISO 3864 (all parts), Graphical symbols - Safety colours and safety signs

1) As impacted by EN 60529:1991/A1:2000 and EN 60529:1991/A2:2013.
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3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 14601:2005+A1:2010,
prEN 15551:2019, prEN 15566:2019, prEN 15807:2019 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1
Berne rectangle
defined free space which is needed to ensure safe working conditions for the shunting staff during
coupling and uncoupling of screw couplings
3.2
clearance
areas needed for moveable parts
3.3
contact plane of buffers
plane tangent to buffing surfaces of both buffer heads at the end of the vehicle perpendicular to running
surface
Note 1 to entry: See EN 13848-1:2003+A1:2008, 3.1.4 and 4.1.
Note 2 to entry: Also named as “buffing plane”.
Note 3 to entry: “Running surface” sometimes also named as “Top of Rail (TOR)”.
3.4
free space
area free of equipment used for protection for, e.g. shunters
3.5
headstock
part of the underframe with a vertical reference plane at the ends of the vehicle where the buffers are
fixed
Note 1 to entry: Headstock includes the part where draw gear is fixed.
3.6
guidance device for draw hook
device to guide and support the draw hook
3.7
shunter
member of staff who couples and uncouples railway vehicles
3.8
symmetrical buffer
buffer, wherein the buffer head is, regardless of its contour geometry, mounted on its width dimension
symmetrically to the centre-line of the buffer housing or to the predetermined nominal position of the
buffer centre-line
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4 Free spaces
4.1 General
To ensure safe working conditions and also for easy operation for the shunters during coupling and
uncoupling, it is necessary to define required free spaces.
With the exception of the shunter's handrails there shall be no devices under the buffers that limit the
shunter's access for coupling operations.
Flexible connecting cables and flexible parts of hoses may penetrate these spaces.
The flexible parts of gangways according to EN 16286-1:2013 may infringe the Berne rectangle.
For assessment of free spaces, the coupling gear components shall be positioned on the centre-line of
the vehicle.
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Dimension in millimetres

Key
1 free space for the shunter (Berne rectangle)
2 free space above running surface without moveable parts (e.g. couplers, pipes)
3 running surface
4 lower edge of buffer head
5 contact plane of fully elastic compressed buffers
6 free spaces, free of fixed devices behind the buffer head above its lower edge
Figure 1 — Free spaces
NOTE Steps and handrails are not part of this document. The dimensions of the shunter steps and handrails
and the clearance around these arrangements are given in EN 16116-1 and EN 16116-2.
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4.2 Berne rectangle
The free space for shunters during coupling is called “Berne rectangle”. Vehicles shall be designed in
such a way that staff are not exposed to undue risk during coupling and uncoupling. The spaces shown
in Figure 1 shall be free of fixed parts in all service conditions.
Any device fixed on a vehicle shall remain at least 40 mm behind the contact plane of fully compressed
buffers above the lower edge of the buffer head.
4.3 Free spaces for coupling of coaches
See free spaces from 4.1 and Figure 2.
The limit of the securing devices for the gangway side plate (if fitted) shall be located at a minimum
distance of 495 mm from the vehicle longitudinal centre-line.
Dimension in millimetres

Key
1 for the shunter (Berne rectangle)
2 not shown in this view (see Figure 1)
3 not shown in this view (see Figure 1)
4 not shown in this view (see Figure 1)
5 contact plane of fully elastic compressed buffers
6 free spaces, free of fixed devices behind the buffer head above its lower edge
7 free space for gangway side plate
Figure 2 — Free spaces for coupling coaches
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4.4 Climb protection
On vehicles, where buffer climb protection is used (compulsory for vehicles subjected to regulations for
dangerous goods), the climb protection shall not restrict the free spaces.
NOTE For buffer climb protection on vehicles subjected to regulations for dangerous goods, see also TE 25 on
RID.
5 Buffers
5.1 General
The following requirements apply to vehicles equipped at least at one end with two buffers according to
prEN 15551:2019, fixed symmetrically to the longitudinal centre-line of the vehicle.
5.2 Position of buffers on the headstock
5.2.1 Distance between buffers
The standard distance between buffer centre-lines shall be nominally according to Table 1.
Table 1 —Track gauge and distance between buffer centre-lines
Track gauge Distance between buffer centre-lines
mm mm
1 435 1 750 ± 10
Interchangeable 1 435/1 524 1 790 ± 10
Interchangeable 1 435/1 600 1 905 ± 3
Interchangeable 1 435/1 668 1 850 ± 10
1 524 1 830 ± 10
1 600 1 905 ± 3
1 668 1 850 ± 10

It is permitted for dual gauge units (interchangeable wheel sets) intended for running between
standard gauge network 1 435 mm and broad-gauge networks to have a different value of the distance
between buffer centre-lines (e.g. 1 850 mm), provided that full compatibility with buffers for standard
1 435 mm gauge is ensured.
Buffers shall be sized so that in horizontal curves and reverse curves, it is not possible for vehicles to
lock buffers. The minimum horizontal overlap between buffer heads in contact shall be 25 mm.
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5.2.2 Height of buffers above top of the rail
The height b of the centre-line of the buffers to the top of the rail shall be in all loading and wear
conditions in accordance with Table 2.
Table 2 —Height of buffers above top of the rail
Type b
mm
Locomotive 940 mm to 1 065 mm
Coach 980 mm to 1 065 mm
Freight wagon and car carrier 940 mm to 1 065 mm

5.3 Buffer fixing
5.3.1 Vehicles without crashworthy buffer systems
The buffers shall be attached to the vehicle headstock.
The screws shall be M 24, grade 8.8, and self-locking nuts, grade 8, shall be used. The screws shall have
a threaded projection of at least three threads.
The recommended tightening torque should be 690 Nm.
For wagons, distance between holes shall be in accordance with Figure 3.
For wagons fitted with 150 mm stroke buffers, pins in the headstock, which indicate that this kind of
buffer shall be used, shall be located at the right side of each buffer (looking at the buffer head) as
shown in Figure 3, item 1, Section A – A. The protrusion of the pin shall be at minimum 20 mm.
NOTE To avoid confusion of buffers with different strokes, buffers with 150 mm stroke therefore have an
opening at their right side, buffers with 105 mm stroke do not have this opening.
The hole spacing (280 × 160) mm for freight wagons should also be used for passenger coaches, vans
and locomotives.
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Dimension in millimetres

Key
pin only for buffer with 150 mm stroke
1
centre-line of the vehicle.
2
distance from buffer centre-line to buffer centre-line (see Table 1)
A
magnified section
*
Figure 3 — Buffer and drilling template for wagon
5.3.2 Vehicles with crashworthy buffer systems
Vehicles that use crashworthy buffers or buffers which form part of a combined system consisting of a
special buffer and a deformation element may have a different mounting configuration (e.g. position of
flange, thread diameter, number of screws and their position).
NOTE These vehicles are locomotives, driving trailers or passenger coaches according to EN 15227 or tank
wagons according to the Regulation for Dangerous Goods.
The marking for wagons fitted with crashworthy buffer systems shall be according to
EN 15877-1:2012+A1:2018.
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5.4 Interaction coupling/buffer
5.4.1 General
To ensure that the train is able to negotiate horizontal curves of 150 m radius safely, the static
characteristics of draw gear and buffers shall be coordinated.
A guideline value of 250 kN should not be exceeded for the compression force of a pair of buffers in
contact on a horizontal curve of 150 m.
Unless otherwise specified in the technical specification, the stiffest static characteristics of the buffer
and draw gear combined together with the static test methods according to prEN 15566:2019 and
prEN 15551:2019 are to apply for evidence of buffer compression force.
The age of elastic elements in operational service should also be taken into account.
Conformity to these requirements may be assessed by calculation.
NOTE 1 The technical specification can define additional conditions for tested elastic devices, as for example
temperature range, which for static characteristics are to be taken into account.
NOTE 2 For new elastic devices, the available experience related assessed values can be applied.
To determine the compression force for vehicles, the calculation method shown under section 3 of
RP 32 of ORE B 36 may be used (the method described in this report is also applicable for coaches and
locomotives). This calculation method may also allow to determine stress levels on smaller radius
curves. If the coupling practice creates pretension forces, these shall be taken into account.
NOTE 3 The calculation method on curves according to RP 32 of ORE B 36 also gives confidence for an S-curve
of 150 m with an intermediate straight of 6 m.
5.4.2 Mounting of buffers
Two buffers with the same elastic system, category, head dimension, stroke and type of housing shall be
fitted at each vehicle end. The nominal length of the buffers on each side shall be the same.
Hous
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