oSIST prEN 1364-6:2022

SLOVENSKI STANDARD
oSIST prEN 1364-6:2022
01-junij-2022
Preskusi požarne odpornosti nenosilnih elementov - 6. del: Zapore votlih
prostorov
Fire resistance tests for non-loadbearing elements - Part 6: Cavity barriers
Feuerwiderstandsprüfungen für nichttragende Bauteile - Teil 6: Hohlraum-Brandsperren
Essais de résistance au feu des éléments non porteurs - Partie 6 : Dispositifs de
recoupement de lame d’air
Ta slovenski standard je istoveten z: prEN 1364-6
ICS:
13.220.50 Požarna odpornost Fire-resistance of building
gradbenih materialov in materials and elements
elementov
91.060.99 Drugi stavbni elementi Other elements of buildings
oSIST prEN 1364-6:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 1364-6:2022


DRAFT
EUROPEAN STANDARD
prEN 1364-6
NORME EUROPÉENNE

EUROPÄISCHE NORM

April 2022
ICS 13.220.50; 91.060.99
English Version

Fire resistance tests for non-loadbearing elements - Part 6:
Cavity barriers
Essais de résistance au feu des éléments non porteurs - Feuerwiderstandsprüfungen für nichttragende
Partie 6 : Dispositifs de recoupement de lame d'air Bauteile - Teil 6: Hohlraum-Brandsperren
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 127.

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

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 1364-6:2022 E
worldwide for CEN national Members.

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Contents Page
European foreword . 5
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Test equipment . 8
4.1 Additional requirements for open cavity barriers . 8
5 Test conditions . 9
5.1 Heating conditions . 9
5.2 Pressure conditions . 9
5.2.1 Cavity Barriers mounted within leaves of walls or in roof voids . 9
5.2.2 Cavity barriers mounted underneath raised access floors. 9
5.2.3 Open cavity barriers . 9
6 Test specimen . 10
6.1 General. 10
6.2 Size . 10
6.3 Number . 10
6.4 Design . 10
6.4.1 General. 10
6.4.2 Test configuration . 10
6.4.3 Boundary/restraint conditions . 11
6.4.4 Penetrating services . 11
6.5 Construction . 11
6.6 Verification . 11
7 Installation of test specimen . 11
7.1 General. 11
7.2 Standard supporting construction . 11
7.2.1 Test specimens mounted in Wall constructions . 11
7.2.2 Test specimens mounted in floor constructions . 11
7.2.3 Open cavity barrier specimens . 12
7.3 Splice locations for open cavity barriers . 12
8 Conditioning . 12
9 Application of instrumentation . 12
9.1 Thermocouples . 12
9.1.1 Furnace thermocouples (plate thermometers) . 12
9.1.2 Unexposed surface thermocouples . 12
9.2 Pressure . 13
10 Test procedure . 13
10.1 General. 13
10.2 Furnace control . 13
10.3 Evaluation of integrity criteria . 13
10.4 Observations during the test . 14
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10.5 Termination of test . 14
11 Performance criteria . 14
11.1 General . 14
11.2 Cavity barriers used as fire stopping between e.g. leaves of masonry and open cavity
barriers . 14
11.3 Open cavity barriers . 14
11.3.1 Insulation . 14
11.3.2 Integrity . 14
11.4 Expression of results . 14
12 Test report . 15
12.1 General . 15
12.2 Reports of tests undertaken on open cavity barriers . 15
12.3 Reports for tests undertaken for application under raised floors . 15
13 Field of direct application of the test results . 15
13.1 Closed cavity barriers . 15
13.1.1 Extension of width . 15
13.1.2 Supporting constructions . 16
13.2 Open cavity barriers . 16
Annex A (normative) Cavity barriers in under floor voids . 19
A.1 Introduction . 19
A.2 Configuration . 19
A.3 Thermocouples for measuring the maximum temperature rise . 20
A.4 Field of direct application. 21
A.4.1 General . 21
A.4.2 Extension of width . 21
Annex B (normative) Cavity barriers within walls e.g. masonry leaves . 22
B.1 Introduction . 22
B.2 Configuration . 22
B.3 Thermocouples for measuring the maximum temperature rise . 24
B.4 Field of direct application. 24
B.4.1 General . 24
B.4.2 Extension of height . 24
B.4.3 Supporting construction . 24
Annex C (normative) Open cavity barriers . 25
C.1 Principle of test/configuration . 25
C.2 Unexposed surface thermocouples . 25
C.2.1 General . 25
C.2.2 Roving thermocouple . 25
Annex D (normative) Open cavity Barriers for sudden heat exposure, tested using removable
shield . 28
D.1 Use of this annex . 28
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D.2 Principle of removable test configuration . 28
D.3 Removable shield . 28
D.4 Test procedure amendments for this test configuration . 28
Annex E (informative) Background and testing philosophy of cavity barriers . 33
E.1 Introduction . 33
E.2 Reference scenarios . 33
E.3 Use of tests for classification . 33
Bibliography . 35
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European foreword
This document (prEN 1364-6:2022) has been prepared by Technical Committee CEN/TC 127 “Fire safety
in buildings”, the secretariat of which is held by BSI.
This document has been prepared by WG1 TG9, in response to CEN/TC 127 resolution No 778. CEN/TC
127 is the CEN committee for drafting fire test standards in support of the Construction Products
Regulation.
The test method is needed in support of ETAG 026-5 for cavity barriers.
This document is currently submitted to the CEN Enquiry.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.

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Introduction
Cavity barriers are provided within buildings to restrict the spread of smoke and fire in concealed spaces.
Cavity barriers can be ‘closed’ e.g. in roof voids, under raised floors, between the inner and outer leaves
of walls such as in timber framed construction; or they can be ‘open’ e.g. as used in ventilated facade
systems, roof eaves, rain screen cladding systems etc.
This document describes tests to measure the ability of a representative specimen of a cavity barrier to
resist the spread of fire from one side to another. A representative sample of a cavity barrier is exposed
to a specified regime of heating and pressure. The performance of the test specimen is monitored on the
basis of criteria in EN 1363-1. The fire resistance of the tested construction is expressed as the time for
which the appropriate criteria have been satisfied.
The principles embodied in this method follow those embodied in EOTA TR31 the fire resistance test for
closed cavity barriers published in 2008. However, TR31 is not applicable to open cavity barriers and
consequently this method has had to be adapted to include these.
Reference Scenario and limitations
Closed cavity barriers whose function is to close a gap between fire resistant elements of building
structure fall within the scope of the small room fire scenario where ISO 834 has been recognized as the
reference fire resistance test.
For open cavity barriers e.g. those used in ventilated facades, rain screens and roof eaves; a European
reference scenario has not yet been established. Work is on-going to develop a full scale façade test and
it is expected that this method will be correlated to that full scale test. Consequently, for the time being
results of tests to this document cannot be used to imply performance of an external facade system in
which the open cavity barrier is included. The test results can be used as supplementary evidence of
cavity barrier performance in systems already accepted by current national regulations. Further
information is given in Annex E.
Caution
The attention of all persons concerned with managing and carrying out this fire resistance test, is drawn
to the fact that fire testing can be hazardous and that there is a possibility that toxic and/or harmful
smoke and gases may be evolved during the test. Mechanical and operation hazards can also arise during
the construction of the test elements or structures, their testing and disposal of test residues.
An assessment of all potential hazards and risks to health should be made and safety precautions should
be identified and provided. Written safety instructions should be issued. Appropriate training should be
given to relevant personnel. Laboratory personnel should ensure that they follow written safety
instructions at all times.
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1 Scope
This test method specifies methods for determining the fire resistance of cavity barriers and is to be used
in conjunction with EN 1363-1.
This document is applicable to non-loadbearing vertically or horizontally oriented closed and open cavity
barriers, which are used to provide fire separation to uncompartmented or ventilated spaces. Cavity
barriers are designed to provide fire separating performance and the test method is therefore based on
the standard room fire exposure in EN 1363-1. Open cavity barrier specimens are installed for test in one
of two ways to simulate either normal or sudden exposure to fire in use.
Ventilating cavity barriers in facades, where the fire exposure comes as a result of a breaking window
and allowing a developed fire to come into contact with the façade, shall be tested as prescribed in
Annex D.
This document is not applicable to cavity barriers containing penetration seals, which shall be tested to
EN 1366-3.
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 1363-1, Fire resistance tests — Part 1: General requirements
EN 1366-3, Fire resistance tests for service installations — Part 3: Penetration seals
EN 1366-6, Fire resistance tests for service installations — Part 6: Raised access and hollow floors
EN 13501-2:2016, Fire classification of construction products and building elements - Part 2: Classification
using data from fire resistance tests, excluding ventilation services
EN ISO 13943, Fire safety — Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 1363-1, EN ISO 13943 and the
following 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
concealed space
space in a building where fire may develop or pass through that is not normally used or accessible by
humans
3.2
closed cavity barrier
non-loadbearing vertically or horizontally oriented element designed to provide fire separation in a
concealed space (cavity)
Note 1 to entry: It will also limit airflow under ambient conditions.
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3.3
splice
connection or junction between or within the length of a linear gap seal where it is being used as a cavity
barrier
3.4
‘open’ cavity barrier
non-loadbearing vertically or horizontally oriented element designed to provide fire separation in a
concealed space (cavity)
Note 1 to entry: These are open to allow ventilation and drainage in the cold state, but which either close in a fire,
or are already fire resisting in the open state, thus providing fire separation in the cavity.
3.5
facade system
system used to protect the outside vertical envelope of a building from the elements
3.6
air gap
space between the back surface of the external wall panels and the outer face of the inner wall or
insulation layer
3.7
sudden exposure to fire
test conducted with a heat shield in place, so that removal after 5 minutes causes sudden exposure to fire
as described in Annex D
4 Test equipment
4.1 Additional requirements for open cavity barriers
In addition to the test equipment specified in EN 1363-1, it is required that for open cavity barriers the
internal dimensions of the test furnace shall be such that a distance of at least 200 mm exists between the
long edge of the open cavity barrier and the wall of the furnace.
The size of the furnace required will depend on the nominal width of the open cavity barrier and is given
in Table 1 below. See also 6.2.
Table 1 — Minimum size of test furnace
Nominal width of open cavity
Minimum size of furnace required
barrier
< 100 mm 1 m × 1 m × > 0,75 m deep
101 mm up to 300 mm 10 times nominal width of cavity barrier × > 0,75 m deep
> 300 mm 3 m × 3 m × > 0,75 m deep

See EN 1363-1, and if applicable EN 1363-2.
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5 Test conditions
5.1 Heating conditions
The heating conditions and the furnace atmosphere shall conform to those given in EN 1363-1.
For open cavity barriers, an option is provided for the use of a removable shield underneath the cavity
barrier which is removed at 5 min into the test suddenly exposing the cavity barrier to the furnace heating
conditions at that time. See Annex D.
5.2 Pressure conditions
The pressure conditions and the furnace atmosphere shall conform to those given in EN 1363-1 unless
modified as follows:
5.2.1 Cavity Barriers mounted within leaves of walls or in roof voids
For cavity barriers mounted between the leaves of walls and above suspended ceilings/in loft spaces, the
pressure conditions and the furnace atmosphere shall conform to those given in EN 1363-1.
5.2.2 Cavity barriers mounted underneath raised access floors
For cavity barriers mounted underneath raised access floors, the following pressure conditions from
EN 1366-6 shall apply:
For plenum heights not greater than 1 m, the pressure in the furnace 100 mm below the soffit shall be
maintained at + 5 Pa (+ 3 Pa).
For plenum heights greater than 1 m, the pressure in the furnace 100 mm below the soffit shall be
maintained at +3 Pa of a pressure calculated as per Formula (1) below:
p 06,,6h× 85 (1)
where
p is the pressure in Pa;
h is the height of plenum below the raised floor in m.

5.2.3 Open cavity barriers
For open cavity barriers the furnace pressure shall be monitored and controlled so that 5 min after the
commencement of the test, the furnace pressure shall be (20 ± 5) Pa at a position (100 ± 10) mm below
the bottom face of the cavity barrier (horizontal orientation) or 100 mm below the top of the furnace
(vertical orientation). Ten minutes after the commencement of the test, the furnace pressure shall be
(20 ± 3) Pa. at a position (100 ± 10) mm below the bottom face of the open-state cavity barrier (horizontal
orientation) or 100 mm below the top of the furnace (vertical orientation).
Laboratories should aim to achieve the specified pressures as soon as possible after commencement of
the test. Furnaces should not be run under e.g. negative pressure for the first few minutes and then the
pressure only established just before 5 min.
For open cavity barriers tested using the thermal exposure of the removable shield, the pressure
conditions in 5.2.3 may not be met immediately after the removal of the shield. In such cases, any pressure
drop should be corrected as quickly as possible and in any case within three minutes.
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6 Test specimen
6.1 General
The test specimen shall consist of a cavity barrier mounted in a supporting construction.
6.2 Size
If, in practice, the height or width of the product is 3 m or smaller, then that dimension of the test
specimen shall be tested at full size. If any dimension of the construction is greater than 3 m, then that
dimension shall be tested at not less than 3 m.
A typical minimum length to width ratio for an open cavity barrier is 10:1, up to a maximum of 3 m length.
In order to maintain this ratio a test furnace of appropriate dimensions shall be used (see 4.2).
For open cavity barriers, the distance between the long edge open cavity barrier and the outer perimeter
of the heated part of the separating element shall be not less than 200 mm at any point in order to avoid
boundary effects (see 4.2).
6.3 Number
The number of test specimens shall be as given in EN 1363-1. Where a cavity barrier is intended for use
in both horizontal and vertical separating elements, both orientations shall be tested.
6.4 Design
6.4.1 General
The test specimen shall be fully representative of the construction used in practice. More than one type
of cavity barrier system may be included in a single test provided the requirements on space separation
(minimum 200 mm between any two specimens) and thermal and pressure conditions and are met.
Joints or splices for the purposes of erection, construction or expansion, shall be incorporated in the test
specimen. Different jointing systems or splices may be included in a single test specimen provided that
they are both subjected to furnace pressure conditions equal to or greater than those specified in 5.2.
The design features which influence fire performance should be included to give the widest application
can be derived from the field of direct application, Clause 13.
6.4.2 Test configuration
Five test configurations appropriate to the end uses of cavity barriers are considered in this document:
a) above suspended ceilings and in lofts and other roof voids to prevent horizontal fire spread;
b) below raised access floors between the
...