oSIST prEN 16286-2:2022

Railway applications - Gangway systems between vehicles - Part 2: Acoustic measurements

This document specifies a measurement method and conditions to obtain reproducible and comparable sound reduction indices of all kinds of rail bound vehicles’ gangway systems as defined in EN 16286 1. The setup includes all components of the system mounted like this is done between two adjacent car bodies within the train, so that a person will be able to use the gangway system, consisting of e.g.:
- the bridge system (footplate);
- side panels;
- flexible components (bellows);
- mounting systems;
- elements to couple parts in the case of separable gangway systems.
The method is applicable to type testing of gangways.
This method is not applicable to:
- interior noise measurements in vehicles;
- structure borne noise measurements.
The type testing procedures specified in this document are of engineering grade (grade 2) in the frequency range from 100 Hz up to 5 000 Hz.
NOTE This is the preferred range for noise declaration purposes, as defined in EN ISO 12001. If test conditions are relaxed, the results are no longer of engineering grade (grade 2).

Bahnanwendungen - Übergangssysteme zwischen Fahrzeugen - Teil 2: Messung der Akustik

Dieses Dokument legt ein Messverfahren und -bedingungen fest, um nachvollziehbare und vergleichbare Schalldämmmaße von Übergangssystemen spurgebundener Fahrzeuge nach EN 16286 1 zu erreichen. Der Aufbau umfasst alle Bauteile des Systems, so wie es zwischen benachbarten Wagenkästen innerhalb des Zuges angebracht wird, sodass eine Person in der Lage ist, das Übergangssystem zu benutzen, das z. B. besteht aus:
- dem Brückensystem (Fußbodenplatte);
- Seitenwänden;
- flexiblen Bauteilen (Faltenbälge);
- Montagesystemen;
- Bauteilen, um Teile im Falle von trennbaren Übergangssystemen zu verbinden.
Die Verfahrensweise gilt für Typprüfungen von Übergängen.
Diese Verfahrensweise gilt nicht für:
- Geräuschmessungen im Inneren von Fahrzeugen;
- Körperschallmessungen.
Die für die Typprüfung in diesem Dokument festgelegten Verfahren haben die Genauigkeitsklasse 2 (Grad 2) im Frequenzbereich von 100 Hz bis 5 000 Hz.
ANMERKUNG Das ist die für die Zwecke von Geräuschangaben bevorzugte Genauigkeitsklasse, wie in EN ISO 12001 bestimmt. Wenn die Prüfbedingungen gelockert werden, haben die Ergebnisse nicht mehr die Genauigkeitsklasse 2 (Grad 2).

Applications ferroviaires - Système d'intercirculations entre véhicules - Partie 2: Mesures acoustiques

No Scope Available

Železnice - Prehodni sistemi med vozili - 2. del: Meritve akustike

General Information

• Status: Not Published
• Public Enquiry End Date: 30-Sep-2022
• ICS: 17.140.30 - Noise emitted by means of transport
• ICS: 45.060.01 - Railway rolling stock in general
• ICS: 45.060.20 - Trailing stock
• Technical Committee: IŽNP - Reilway applications
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 27-Jul-2022
• Due Date: 14-Dec-2022
• Directive: 2016/797/EU - Directive (EU) 2016/797 of the European Parliament and of the Council of 11 May 2016 on the interoperability of the rail system within the European Union (Text with EEA relevance)
• Mandate: M/483 - Mandate for programming and standardisation addressed to the European standardisation bodies under directive 2008/57/EC in the field of the interoperability of the rail system within the European Union
• Ref Project: prEN 16286-2 - Railway applications - Gangway systems between vehicles - Part 2: Acoustic measurements

RELATIONS

• Revised: SIST EN 16286-2:2013 - Railway applications - Gangway systems between vehicles - Part 2: Acoustic measurements
• Effective Date: 15-Jul-2020

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 16286-2:2022
01-september-2022
Železnice - Prehodni sistemi med vozili - 2. del: Meritve akustike
Railway applications - Gangway systems between vehicles - Part 2: Acoustic
measurements
Bahnanwendungen - Übergangssysteme zwischen Fahrzeugen - Teil 2: Messung der
Akustik

Applications ferroviaires - Système d'intercirculations entre véhicules - Partie 2: Mesures

acoustiques
Ta slovenski standard je istoveten z: prEN 16286-2
ICS:
17.140.30 Emisija hrupa transportnih Noise emitted by means of
sredstev transport
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
oSIST prEN 16286-2:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 16286-2:2022
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oSIST prEN 16286-2:2022
DRAFT
EUROPEAN STANDARD
prEN 16286-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2022
ICS 45.060.20 Will supersede EN 16286-2:2013
English Version
Railway applications - Gangway systems between vehicles
- Part 2: Acoustic measurements

Applications ferroviaires - Système d'intercirculations Bahnanwendungen - Übergangssysteme zwischen

entre véhicules - Partie 2: Mesures acoustiques Fahrzeugen - Teil 2: Messung der Akustik

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, Türkiye 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
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. prEN 16286-2:2022 E

worldwide for CEN national Members.
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prEN 16286-2:2022 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Introduction .................................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms, definitions and symbols ................................................................................................................. 6

3.1 Terms and definitions ................................................................................................................................... 6

3.2 Symbols ............................................................................................................................................................ 13

4 Instrumentation and calibration ............................................................................................................ 14

4.1 Instrumentation ........................................................................................................................................... 14

4.2 Calibration ...................................................................................................................................................... 15

5 Test setup ........................................................................................................................................................ 15

5.1 General ............................................................................................................................................................. 15

5.2 Test setup type 1 .......................................................................................................................................... 15

5.3 Test setup type 2 .......................................................................................................................................... 16

5.4 Test setup type 3 .......................................................................................................................................... 18

6 Test procedure .............................................................................................................................................. 19

6.1 General ............................................................................................................................................................. 19

6.2 Generation of sound field .......................................................................................................................... 19

6.3 Sound pressure level in the source room ............................................................................................ 19

6.4 Measurement of average sound intensity level on the measurement surface ...................... 20

6.4.1 General ............................................................................................................................................................. 20

6.4.2 Measurement surface ................................................................................................................................. 20

6.4.3 Qualification of the measurement surface .......................................................................................... 20

6.4.4 Scanning procedure .................................................................................................................................... 21

6.4.5 Procedure using discrete positions ....................................................................................................... 21

6.4.6 Scanning procedure for one measurement area .............................................................................. 22

6.4.7 Scanning procedure for a partial measurement surface S ...................................................... 22

6.5 Background noise ........................................................................................................................................ 22

6.6 Frequency range of measurements ....................................................................................................... 22

7 Presentation of results ............................................................................................................................... 23

8 Quality of the measurements ................................................................................................................... 23

8.1 Deviations from the requirements ........................................................................................................ 23

8.2 Measurement uncertainties ..................................................................................................................... 23

9 Test report ...................................................................................................................................................... 23

Annex A (normative) Method to qualify the sound field on the surface of the test specimen

in the source room ....................................................................................................................................... 25

Bibliography ................................................................................................................................................................. 27

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European foreword

This document (prEN 16286-2:2022) 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 16286-2:2013.

In comparison with the previous edition, the following technical modifications have been made:

a) normative references have been updated;
b) terms and definitions have been revised;
c) requirements on measurement setup (now “test setup”) have been revised;
d) requirements on test procedure have been revised;

e) requirements on measurement tolerances (now “measurement uncertainties”) have been revised;

f) requirements on test report have been revised;
g) Annex A has been revised.

The EN 16286 series of European Standards, Railway applications — Gangway systems between vehicles,

consists of the following parts:
— Part 1: Main applications;
— Part 2: Acoustic measurements.
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Introduction

This document presents a measurement method to collect information about the noise insulation of rail

bound vehicle gangway systems. These components need their own measurement procedure as the

geometrical sound distribution situation is not in line with the basic assumptions of general standards

about noise insulation measurements as provided for building elements, etc.

In this document, a number of different setups are described, which represent possible approaches to

the ideal test situation. As the approaches can contradict the ideal sound fields, the document includes

methods to assess the influence of reflections and other difficulties in order to reduce the uncertainties

of these test methods to an acceptable amount in Annex A.
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1 Scope

This document specifies a measurement method and conditions to obtain reproducible and comparable

sound reduction indices of all kinds of rail bound vehicles’ gangway systems as defined in EN 16286-1.

The setup includes all components of the system mounted like this is done between two adjacent car

bodies within the train, so that a person will be able to use the gangway system, consisting of e.g.:

— the bridge system (footplate);
— side panels;
— flexible components (bellows);
— mounting systems;
— elements to couple parts in the case of separable gangway systems.
The method is applicable to type testing of gangways.
This method is not applicable to:
— interior noise measurements in vehicles;
— structure borne noise measurements.

The type testing procedures specified in this document are of engineering grade (grade 2) in the

frequency range from 100 Hz up to 5 000 Hz.

NOTE This is the preferred range for noise declaration purposes, as defined in EN ISO 12001. If test

conditions are relaxed, the results are no longer of engineering grade (grade 2).

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 61672-1, Electroacoustics - Sound level meters - Part 1: Specifications

EN 61672-2, Electroacoustics - Sound level meters - Part 2: Pattern evaluation tests

EN IEC 60942, Electroacoustics - Sound calibrators
EN ISO 266, Acoustics - Preferred frequencies (ISO 266)

EN ISO 3741, Acoustics - Determination of sound power levels and sound energy levels of noise sources

using sound pressure - Precision methods for reverberation test rooms (ISO 3741)

EN ISO 9614-1:2009, Acoustics - Determination of sound power levels of noise sources using sound

intensity - Part 1: Measurement at discrete points (ISO 9614-1:1993)

EN ISO 10140 (all parts), Acoustics - Laboratory measurement of sound insulation of building elements

EN ISO 12999-1, Acoustics - Determination and application of measurement uncertainties in building

acoustics - Part 1: Sound insulation (ISO 12999-1)

EN ISO 15186-1, Acoustics - Measurement of sound insulation in buildings and of building elements using

sound intensity - Part 1: Laboratory measurements (ISO 15186-1)
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3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1.1
sound pressure

root mean square (RMS) value of a fluctuating pressure superimposed on the static atmospheric

pressure measured over a certain time period
3.1.2
sound pressure level
level given by the formula:
 
L = 10log  (1)
 
 0
Note 1 to entry: Adapted from ISO 1996-1.
3.1.3
average sound pressure level in the source room with the uncovered gangway

ten times the logarithm to the base 10 of the ratio of the space and time average of the sound pressure

squared to the square of the reference sound pressure, the space average being taken over the entire

room with the exception of those parts where the direct radiation of a sound source or the near field of

the boundaries (wall, window, etc.) is of significant influence
Note 1 to entry: For a complete definition, see EN ISO 10140-2.
Note 2 to entry: L is used for determination of the sound reduction index.
3.1.4
average sound pressure level in the source room with the covered gangway

ten times the logarithm to the base 10 of the ratio of the space and time average of the sound pressure

squared to the square of the reference sound pressure, the space average being taken over the entire

room with the exception of those parts where the direct radiation of a sound source or the near field of

the boundaries (wall, window, etc.) is of significant influence

Note 1 to entry: L * is used for qualification of the sound field according to Annex A.

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3.1.5
sound reduction index

ten times the logarithm to the base 10 of the ratio of the sound power W incident on the test specimen

to the sound power W transmitted through the specimen
(2)
R= 10log
Note 1 to entry: The expression “sound transmission loss” is also in use.
3.1.6
sound intensity

time-averaged rate of flow of sound energy per unit area oriented normal to the local particle velocity

which is a vectorial quantity equal to
I pt⋅ u t dt (3)
( ) ( )
3.1.7
normal sound intensity

component of the sound intensity in the direction normal to a measurement surface defined by the unit

normal vector n :
I In⋅ (4)
3.1.8
normal sound intensity level

ten times the logarithm to the base 10 of the ratio of the unsigned value of the normal sound intensity to

the reference intensity I , as given by
L = 10log (5)
where
−12 2
IW= 10 / m (6)
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3.1.9
surface pressure-intensity indicator

difference between the sound pressure level L and the normal sound intensity level L on the

p In
measurement surface, both being time and surface averaged:
F LL− (7)
pI p In

Note 1 to entry: This general notation is in accordance with EN ISO 9614-2. In EN ISO 9614-1, the notation F is

used.
 
1 01, L
 
F 10log SL10− (8)
pI mc In
 
 c 

Note 2 to entry: Formula (8) is used for the purpose of this document; see 6.4.7.

3.1.10
pressure-residual intensity index
pI0

difference between the indicated sound pressure level L and the indicated sound intensity level L

p I

when the intensity probe is placed and oriented in a sound field such that the sound intensity is zero

Note 1 to entry: Details for determining δ are given in EN 61043:
pI0
δ LL−
( )
pI0 p I
3.1.11
source side area of the test specimen
contour area of the test specimen at the source side
Note 1 to entry: See Figure 1 and Figure 2.
3.1.12
measurement surface

surface in parallel to the gangway contour totally enclosing the test specimen on the receiving side,

scanned or sampled by the probe during the measurements
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Key
1 gangway surface at source side
2 gangway surface at receiving side
3 measurement surface S
4 contour area of the test specimen at the source side S

5 distance d between contour area of the receiving side and the measurement surface S

Figure 1 — Measurement surface S for intensity measurements inside the gangway and

contour area of the outer source side S
Key
1 gangway surface at receiving side
2 gangway surface at source side
3 measurement surface S
4 contour area of the test specimen at the source side S

5 distance d between contour area of the receiving side and the measurement surface S

Figure 2 — Measurement surface S for intensity measurements outside the gangway and

contour area of the inner source side S
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Key

11, 12 intersection points between horizontal line above floor level and inner contour of the gangway system

13, 14 intersection points between horizontal line below ceiling and inner contour of the gangway system

a distance between horizontal line (intersection points 13 and 14) and ceiling level of the gangway system

= 200 mm

b distance between horizontal line (intersection points 11 and 12) and floor level of the gangway system =

200 mm
Figure 3 — Procedure to determine areas of floor, sides and ceiling
Key
1 partial measurement surface of the roof S 5 partial area of the roof S
m1 1
2 partial measurement surface of the side 1 S 6 partial area of the side 1 S
m2 2
3 partial measurement surface of the side 2 S 7 partial area of the side 2 S
m3 3
4 partial measurement surface of the floor S 8 partial area of the floor S
m4 4

Figure 4 — Procedure to determine partial areas S to S and partial measurement surfaces S

1 4 m1
to S in the case of an inside measurement surface
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Key
1 partial measurement surface of the roof S 5 partial area of the roof S
m1 1
2 partial measurement surface of the side 1 S 6 partial area of the side 1 S
m2 2
3 partial measurement surface of the side 2 S 7 partial area of the side 2 S
m3 3
4 partial measurement surface of the floor S 8 partial area of the floor S
m4 4

Figure 5 — Procedure to determine partial areas S to S and partial measurement surfaces S

1 4 m1
to S in the case of an outside measurement surface
3.1.13
partial area

inner respectively outer contour area S of the test specimen at the source side subdivided into the

contiguous partial areas S , representing the sidewalls, the floor and the ceiling

Note 1 to entry: c has values from 1 to 4.

Note 2 to entry: The sum of all partial areas S equals the inner respectively outer contour area S.

Note 3 to entry: Partial areas S can be combined from any number of contiguous subareas S .

c ci
SS= (9)
c ∑ ci
Note 4 to entry: See Figure 4 and Figure 5.
3.1.14
subarea

part of the inner respectively outer contour of the test specimen at the source side

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3.1.15
partial measurement surface
contiguous part of the measurement surface S of the test specimen:
SS= (10)
mmc ∑ ci
Note 1 to entry: See Figure 4 and Figure 5.
3.1.16
measurement subarea
mci

part of the measurement surface S being measured with the intensity probe using one continuous

scan or discrete positions

Note 1 to entry: No overlap and no gaps are intended between subareas. The measurement subarea S is related

mci
to the subarea S .
3.1.17
intensity sound reduction index of a partial area of a gangway
IGc

index for the partial area c evaluated from Formula (2), assuming that the sound field in the source

room is diffuse:
S
RL= +−∆L 6 dB− L− 10log (11)
IGccp1 c In
c
where
 
1 01, L
( )
Inci
 
(12)
LS10log × 10
Inc mci
 
 i 

Note 1 to entry: If the sound intensity for a measurement subarea has a negative direction (i.e. if the flow of

energy is in the direction towards the test object) a minus-sign will be inserted before the respective S .

mci
3.1.18
intensity sound reduction index of a subarea of a gangway
IGci

index for the subarea c evaluated from Formula (2), assuming that the sound field in the source room is

diffuse:
mci
R = LL+∆−−6 dB L − 10log (13)
IGci p1 ci Inci
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3.1.19
overall intensity sound reduction index of a gangway

index for the overall area S evaluated from Formula (2), assuming that the sound field in the source

room is diffuse:
RL+∆L− 6− L− 10log (14)
IG p1 c In
where
01, L
( )
Inc
LS= 10log10 (15)
In mc

Note 1 to entry: The overall intensity sound reduction index can also be calculated using the following formula:

1 −01, R
( )
IGc
RS=−10log 10 (16)
IG ∑ c
Note 2 to entry: See also 3.1.17, Note 1 to entry.
3.2 Symbols
For the purposes of this document, the following symbols apply.
Table 1 — Symbols
Symbol Description Unit
A sound absorption area of the receiving side
surface pressure-intensity indicator dB
I sound intensity
W/m
normal sound intensity
W/m
−12 2
reference intensity, 10 W / m
0 W/m
normal sound intensity level dB
average normal sound intensity level over the total
In measurement surface S at the receiving side
average normal sound intensity level over the partial
Inc
measurement surface S at the receiving side
average normal sound intensity level over the sub measurement
Inci
surface S at the receiving side
mci
sound pressure level dB
surface-averaged sound pressure level over S at the receiving
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Symbol Description Unit
side
average sound pressure level in the source room with the
uncovered gangway
average sound pressure level in the source room with the
L *
covered gangway
averaged sound pressure level in the source room near the
pSc
covering plate at partial area S
unit normal vector directed out of the volume enclosed by the
measurement surface
p sound pressure Pa
p reference sound pressure; p = 20 μPa
μPa
0 0
p(t) instantaneous sound pressure at a point Pa
R sound reduction index dB
R dB
overall intensity sound reduction index of a gangway
R dB
intensity sound reduction index of a partial area of a gangway
IGc
R dB
intensity sound reduction index of a subarea of a gangway
IGci
S source side area of the test specimen m
partial area m
subarea
measurement surface m
partial measurement surface m
measurement subarea
mci
T averaging time s
( ) instantaneous particle velocity at the same point m/s
ΔL indicator for the diffusity of the sound field at partial area S
c c
ΔL indicator for the diffusity of the sound field at sub area S
ci ci
pressure-residual intensity index dB
pI0
4 Instrumentation and calibration
4.1 Instrumentation

The compliance of the calibrator with the requirements of EN IEC 60942 shall be verified at least once a

year. The compliance of the instrumentation system with the requirements of EN 61672-1 and

EN 61672-2 shall be verified at least every two years.
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4.2 Calibration

Before and after each series of measurements and at least each time the cabling has been disconnected

and reconnected, a sound calibrator meeting the requirements of class 1 according to EN IEC 60942

shall be applied to the microphone(s) for verifying the calibration of the entire measuring system at one

or more frequencies over the frequency range of interest. If the results of this process vary by more

than 0,5 dB between two consecutive checks, the results collected in between shall be rejected.

5 Test setup
5.1 General

The general setup consists of a gangway system to be measured, a source room where a diffuse sound

field is provided and a separated receiver room where the transmitted sound intensity is measured. It is

possible to apply the diffuse sound field to the inner or outer surface of the gangway system; the

transmitted sound intensity is measured at the receiver side.

Source rooms shall be designed as reverberant rooms and comply with EN ISO 3741. Minimum volume

of reverberant rooms shall be 200 m .

The free opening(s) of the gangway shall be covered with an adapter, respectively with closing panels.

In any test frequency the sound reduction of the closing panel shall exceed the sound reduction of the

gangway system by at least 10 dB, but preferably more than 15 dB. The shape of the closing panels shall

not exceed the shape of the gangway outer surface by more than 200 mm at any point (see Figure 6

to Figure 8).

As the original sealing system between the frame of the gangway and the vehicle body cannot always be

reconstructed properly in a test setup with adjoining adaptor plates, this detail is generally excluded

from test setup. All joints between the frames of the gangway and the adaptor plates or walls of the test

facility may therefore be sealed airtightly, e.g. with elastic sealants. Internal sealings of the gangway

system shall reflect the design for the serial production and shall not be sealed additionally with e.g.

sealant mass.

The testing shall be carried out according to one of the setups described in 5.2, 5.3 and 5.4.

5.2 Test setup type 1

The gangway system is mounted on a dividing wall outside the source room as shown in Figure 6. The

source side is at the inner side of the gangway and the measurement surface is at the outer surface of

the gangway.
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Dimensions in millimetres
Key
1 source room – diffuse sound field
2 absorbing mat
3 closing panel with high sound insulation
4 solid wall
5 receiving side: room with absorbing surfaces or free field
Figure 6 — Example for test setup type 1

At the receiving side any sound reflecting surface next to the measurement surface shall be covered

with a sound absorbing material (except the dividing wall on which the gangway is mounted). The

sound absorbing material shall have a thickness of > 200 mm and an absorption coefficient α > 0,95 at

frequencies > 315 Hz. A minimum distance of 1 m between those (covered) surfaces and the surface of

the gangway system shall be kept.
5.3 Test setup type 2

The gangway system is mounted free standing in the source room as shown in Figure 7. Both free

openings of the gangway are covered towards the source room with closing panels (one of them with a

highly sound insulating access door). The source side is at the outer side of the gangway and the

measurement surface is at the inner surface of the gangway.
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Dimensions in millimetres
Key
1 source room – diffuse sound field
2 solid wall
3 gangway
4 closing panel with door – high sound insulation
5 closing panel – high sound insulation
6 floor
Figure 7 — Example for test setup type 2

Preferably the gangway shall not be mounted with the covered openings in parallel to any wall of the

source room. The following minimum distances of the outer gangway surface to room surfaces shall be

kept:
— to the floor: min. 1,0 m;
— to any wall: min. 1,5 m;
— to the ceiling: min. 1,0 m.
In case of the gangway being mounted with the clo
...