Fire resistance tests for service installations - Part 12: Non-mechanical fire barrier for ventilation ductwork

This part of EN 1366 specifies a method for determining the fire resistance of non-mechanical fire barriers installed in fire separating elements designed to withstand heat and the passage of smoke and gases at high temperature. This European Standard is used in conjunction with EN 1363-1 and EN 1366-2.
This European Standard is not suitable for testing non-mechanical fire barriers in suspended ceilings without modification.
This European Standard is not suitable for testing fire dampers, see EN 1366-2.
This European Standard is not suitable for testing such products as air transfer grilles, as the pressures and flows involved are different and may cause differing behaviour.

Feuerwiderstandsprüfungen für Installationen - Teil 12: Nichtmechanische Brandschutzverschlüsse für Lüftungsleitungen

Dieser Teil von EN 1366 legt ein Verfahren zur Bestimmung der Feuerwiderstandsdauer von nicht-mechanischen Brandschutzverschlüssen fest, die in feuerwiderstandsfähigen raumabschließenden Bauteilen eingebaut sind und dafür vorgesehen sind, Wärme und dem Durchtritt von Rauch und Gasen bei hohen Temperaturen standzuhalten. Diese Europäische Norm wird in Zusammenhang mit EN 1363-1 und EN 1366-2 angewendet.
Diese Europäische Norm ist ohne Abänderung für die Prüfung von nichtmechanischen Brandschutz–verschlüssen in Unterdecken nicht geeignet.
Diese Europäische Norm ist nicht geeignet für die Prüfung von Brandschutzklappen, siehe EN 1366-2.
Diese Europäische Norm ist nicht geeignet für die Prüfung von Produkten wie z. B. Lüftungsbausteinen, da sich die zugehörigen Drücke und Volumendurchflüsse unterscheiden und abweichendes Verhalten verursachen können.

Essais de résistance au feu des installations techniques - Partie 12 : Barrière résistante au feu non mécanique pour les conduits de ventilation

La présente partie de l’EN 1366 spécifie une méthode de détermination de la résistance au feu des barrières résistantes au feu non mécaniques installées dans des éléments de séparation résistants au feu, conçues pour résister à la chaleur et au passage des fumées et des gaz à haute température. La présente Norme européenne est utilisée conjointement avec l’EN 1363-1 et l’EN 1366-2.
Sans modification, la présente Norme européenne ne convient pas aux essais de barrières résistantes au feu non mécaniques dans les plafonds suspendus.
La présente Norme européenne ne convient pas pour l’essai de clapets résistant au feu ; voir l’EN 1366-2.
La présente Norme européenne ne convient pas pour l’essai de produits tels que les grilles de transfert, comme les pressions et débits concernés sont différents et peuvent conduire à un comportement différent.

Preskusi požarne odpornosti servisnih inštalacij - 12. del: Nemehanske požarne pregrade za prezračevalne kanale

Ta del standarda EN 1366 določa metodo za ugotavljanje požarne odpornosti nemehanskih požarnih pregrad, ki so nameščene na požarnih ločevalnih elementih, zasnovanih, da vzdržijo vročino ter prehod dima in plinov pri visokih temperaturah. Ta evropski standard se uporablja v povezavi s standardoma EN 1363-1 in EN 1366-2. Ta evropski standard ni primeren za preskušanje nemehanskih požarnih pregrad v spuščenih stropih brez sprememb. Ta evropski standard ni primeren za preskušanje dušilnikov ognja, glej EN 1366-2. Ta evropski standard ni primeren za preskušanje izdelkov, kot so rešetke za prehod zraka, ker so tlaki in pretoki različni, kar lahko povzroči drugačno obnašanje.

General Information

Status
Published
Publication Date
05-Nov-2019
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
06-Nov-2019
Completion Date
06-Nov-2019

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SLOVENSKI STANDARD
SIST EN 1366-12:2014+A1:2020
01-januar-2020
Nadomešča:
SIST EN 1366-12:2014
Preskusi požarne odpornosti servisnih inštalacij - 12. del: Nemehanske požarne
pregrade za prezračevalne kanale

Fire resistance tests for service installations - Part 12: Non-mechanical fire barrier for

ventilation ductwork
Feuerwiderstandsprüfungen für Installationen - Teil 12: Nichtmechanische
Brandschutzverschlüsse für Lüftungsleitungen

Essais de résistance au feu des installations techniques - Partie 12 : Barrière résistante

au feu non mécanique pour les conduits de ventilation
Ta slovenski standard je istoveten z: EN 1366-12:2014+A1:2019
ICS:
13.220.50 Požarna odpornost Fire-resistance of building
gradbenih materialov in materials and elements
elementov
91.060.40 Dimniki, jaški, kanali Chimneys, shafts, ducts
SIST EN 1366-12:2014+A1:2020 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN 1366-12:2014+A1:2020
---------------------- Page: 2 ----------------------
SIST EN 1366-12:2014+A1:2020
EN 1366-12:2014+A1
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2019
EUROPÄISCHE NORM
ICS 13.220.50; 91.140.30
English Version
Fire resistance tests for service installations - Part 12:
Non-mechanical fire barrier for ventilation ductwork

Essais de résistance au feu des installations techniques Feuerwiderstandsprüfungen für Installationen - Teil

- Partie 12 : Barrière résistante au feu non mécanique 12: Nichtmechanische Brandschutzverschlüsse für

pour les conduits de ventilation Lüftungsleitungen

This European Standard was approved by CEN on 13 June 2014 and includes Amendment 1 approved by CEN on 2 September

2019.

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

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1366-12:2014+A1:2019 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 1366-12:2014+A1:2020
EN 1366-12:2014+A1:2019 (E)
Contents Page

Foreword .......................................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 6

1 Scope .................................................................................................................................................................... 7

2 Normative references .................................................................................................................................... 7

3 Terms and definitions ................................................................................................................................... 7

4 Test equipment ................................................................................................................................................ 8

4.1 General ................................................................................................................................................................ 8

4.2 Connecting duct ............................................................................................................................................... 8

4.3 Volume flow measuring station ................................................................................................................. 8

4.4 Condensing unit ............................................................................................................................................... 9

4.5 Gas temperature measuring devices ........................................................................................................ 9

4.6 Exhaust fan system ......................................................................................................................................... 9

5 Test conditions ................................................................................................................................................. 9

6 Test specimen ................................................................................................................................................... 9

6.1 Size ........................................................................................................................................................................ 9

6.2 Number of tests ................................................................................................................................................ 9

6.2.1 General ................................................................................................................................................................ 9

6.2.2 Supporting construction ............................................................................................................................ 10

6.2.3 Method of installation in the supporting construction .................................................................. 10

6.2.4 Method of installation on to the supporting construction ............................................................ 10

6.2.5 Method of installation away from the supporting construction ................................................. 10

6.3 Design ............................................................................................................................................................... 11

6.3.1 General ............................................................................................................................................................. 11

6.3.2 Orientation to be tested ............................................................................................................................. 11

6.3.3 Non-mechanical fire barriers installed within a wall or floor opening .................................... 11

6.3.4 Non-mechanical fire barriers mounted on to the face of a wall or floor .................................. 11

6.3.5 Non-mechanical fire barriers mounted remote from a wall or floor ........................................ 11

7 Installation of test specimen .................................................................................................................... 12

7.1 General ............................................................................................................................................................. 12

7.2 Supporting construction ............................................................................................................................ 12

7.3 Minimum separation................................................................................................................................... 12

8 Conditioning ................................................................................................................................................... 13

8.1 General ............................................................................................................................................................. 13

8.2 Water-based sealing materials ............................................................................................................... 13

9 Application of instrumentation .............................................................................................................. 13

9.1 Thermocouples ............................................................................................................................................. 13

9.1.1 Furnace thermocouples (plate thermometers) ................................................................................ 13

9.1.2 Unexposed surface temperature ............................................................................................................ 13

9.2 Furnace pressure ......................................................................................................................................... 13

9.2.1 General ............................................................................................................................................................. 13

9.2.2 Pressure differential measurement, furnace and connecting duct ........................................... 13

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SIST EN 1366-12:2014+A1:2020
EN 1366-12:2014+A1:2019 (E)

10 Test procedure .............................................................................................................................................. 14

10.1 Determination of leakage of connecting duct and measuring station....................................... 14

10.2 Fire test procedure ....................................................................................................................................... 14

11 Performance criteria ................................................................................................................................... 15

12 Test report ...................................................................................................................................................... 16

13 Field of direct application of test results ............................................................................................. 17

13.1 Size of non-mechanical fire barrier ....................................................................................................... 17

13.2 Non-mechanical fire barriers installed within structural openings .......................................... 17

13.3 Non-mechanical fire barriers installed onto the face of a wall or a floor ................................. 17

13.4 Non-mechanical fire barriers remote from a wall or floor ............................................................ 17

13.5 Fire from above ............................................................................................................................................. 18

13.6 Separation between non-mechanical fire barriers and between non-mechanical fire

barriers and construction elements ...................................................................................................... 18

13.7 Supporting constructions .......................................................................................................................... 18

Annex A (normative) EOTA TR026 - Characterization, Aspects of Durability and Factory

Production Control for Reactive Materials, Components and Products ................................... 31

Bibliography ................................................................................................................................................................. 32

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SIST EN 1366-12:2014+A1:2020
EN 1366-12:2014+A1:2019 (E)
European foreword

This document (EN 1366-12:2014+A1:2019) has been prepared by Technical Committee CEN/TC 127

“Fire safety in buildings”, the secretariat of which is held by BSI.

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 May 2020 and conflicting national standards shall be

withdrawn at the latest by May 2020.

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 European Standard has been prepared under a mandate given to CEN by the European

Commission and the European Free Trade Association."
This document includes Amendment 1 approved by CEN on 2 September 2019.
This document supersedes !EN 1366-12:2014".

The start and finish of text introduced or altered by amendment is indicated in the text by tags !".

EN 1366, Fire resistance tests for service installations, consists of the following parts:

— Part 1: Ventilation ducts;
— Part 2: Fire dampers;
— Part 3: Penetration seals;
— Part 4: Linear joint seals;
— Part 5: Service ducts and shafts;
— Part 6: Raised access and hollow core floors;
— Part 7: Conveyor systems and their closures;
— Part 8: Smoke extraction ducts;
— Part 9: Single compartment smoke extraction ducts;
— Part 10: Smoke control dampers;

— Part 11: Fire protective systems for cable systems and associated components !text deleted";

— Part 12: Non-mechanical fire barrier for ventilation ductwork (this document);
— Part 13: !Chimneys".
!text deleted"

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,

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SIST EN 1366-12:2014+A1:2020
EN 1366-12:2014+A1:2019 (E)

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.
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SIST EN 1366-12:2014+A1:2020
EN 1366-12:2014+A1:2019 (E)
Introduction

The purpose of the test is to evaluate the ability of a non-mechanical (no moving parts) fire barrier (see

Annex A) to prevent fire and smoke spreading from one fire compartment to another through the air

ductwork system which may penetrate fire separating walls and floors.

Non-mechanical fire barriers are unable to achieve an “S” classification, which requires a known limited

ambient leakage, as they are unable to be closed except under fire conditions.

The non-mechanical fire barrier is attached (directly or remotely via a section of ducting), to a fire

separating element in a manner representative of practice.

Tests are performed starting with the non-mechanical fire barrier in its cold standard state to expose it

to furnace conditions.

Temperature and integrity measurements are carried out in various parts of the test construction

during the test. The leakage of the non-mechanical fire barrier system is measured (continuously during

the test) by direct flow measurements while maintaining a constant pressure differential across the

closed non-mechanical fire barrier of 300 Pa.
Caution:

The attention of all persons concerned with managing and carrying out this fire resistance test is drawn

to the fact that fire testing may be hazardous and that there is a possibility that toxic and/or harmful

smoke and gases may be evolved during the test. Mechanical and operational hazards may 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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SIST EN 1366-12:2014+A1:2020
EN 1366-12:2014+A1:2019 (E)
1 Scope

This part of EN 1366 specifies a method for determining the fire resistance of non-mechanical fire

barriers installed in fire separating elements designed to withstand heat and the passage of smoke and

gases at high temperature. This European Standard is used in conjunction with EN 1363-1 and

EN 1366-2.

This European Standard is not suitable for testing non-mechanical fire barriers in suspended ceilings

without modification.
This European Standard is not suitable for testing fire dampers, see EN 1366-2.

This European Standard is not suitable for testing such products as air transfer grilles, as the pressures

and flows involved are different and may cause differing behaviour.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. 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 1363-2, Fire resistance tests - Part 2: Alternative and additional procedures

EN 1366-2, Fire resistance tests for service installations - Part 2: Fire dampers

EN ISO 5167-1, Measurement of fluid flow by means of pressure differential devices inserted in circular

cross-section conduits running full - Part 1: General principles and requirements (ISO 5167-1)

EN ISO 5167-2, Measurement of fluid flow by means of pressure differential devices inserted in circular

cross-section conduits running full - Part 2: Orifice plates (ISO 5167-2)

EN ISO 5167-3, Measurement of fluid flow by means of pressure differential devices inserted in circular

cross-section conduits running full - Part 3: Nozzles and Venturi nozzles (ISO 5167-3)

EN ISO 13943, Fire safety - Vocabulary (ISO 13943)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 1363-1, EN 1366-2 and

EN ISO 13943, together with the following, apply.
3.1
non-mechanical fire barrier

open device with no moving parts for use in HVAC ventilation systems at fire boundaries that only

closes to maintain compartmentation in the event of a fire
3.2
test specimen

non-mechanical fire barrier, connecting frame and (if applicable) the perimeter penetration sealing

system
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SIST EN 1366-12:2014+A1:2020
EN 1366-12:2014+A1:2019 (E)
3.3
connecting duct

duct section between the non-mechanical fire barrier or supporting construction and the measuring

station
3.4
test construction

complete assembly of the test specimen, the connecting duct and the supporting construction

3.5
measuring station

equipment installed between the connecting duct and the exhaust equipment to determine the volume

flow rate of gases passing through the fire barrier under test
3.6
exhaust equipment

equipment consisting of a fan and balancing or dilution barriers (if any), to apply and maintain the

underpressure in the connecting duct
4 Test equipment
4.1 General

In addition to the test equipment specified in EN 1363-1, and if applicable, EN 1363-2, the following is

required. Examples of test configurations are shown in Figures 1 and 2.
4.2 Connecting duct

The connecting duct shall be of all welded construction fabricated from (1,5 ± 0,1) mm thick steel of the

same size (width x height or diameter) as the non-mechanical fire barrier being tested. The duct shall

have a length of two times the diagonal dimension of the non-mechanical fire barrier up to a maximum

of 2 m. Where a non-mechanical fire barrier that has a short spigot such that connection to the

connecting duct is difficult, this spigot shall be extended by 500 mm using material of the same type and

thickness of the spigot in order to provide a secure air-tight connection without unduly stiffening the

non-mechanical fire barrier. This extended spigot shall be all welded the same as the connecting duct.

The length of the connecting duct shall then be reduced by 500 mm.
The connecting duct may be provided with a gas tight observation window.

Care should be taken in the event of testing to Figure 4, to select a method of connecting the non-

mechanical fire barrier to the ductwork to ensure that accurate leakage is recorded.

4.3 Volume flow measuring station

This shall consist of a venturi, orifice plate, or other suitable device and (where necessary) an air flow

straightener, installed in straight lengths of pipe, all sized to EN ISO 5167-1, EN ISO 5167-2 and

EN ISO 5167-3. It shall be installed between the connecting duct and the exhaust fan to determine the

volume flow rate of gases passing through the non-mechanical fire barrier under test. The measuring

device shall be capable of measuring to an accuracy of ± 5 %. Regardless of whether vertical or

horizontal non-mechanical fire barriers are being tested, the volume flow measuring station shall

always be used in a horizontal orientation.
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SIST EN 1366-12:2014+A1:2020
EN 1366-12:2014+A1:2019 (E)
4.4 Condensing unit

Where materials used in the construction of a non-mechanical fire barrier may generate quantities of

steam during the fire test, a condensing unit having provision for drainage shall be installed between

the non-mechanical fire barrier and the flow measuring device. When using the condensing device, the

temperature recorded by the thermocouple positioned downstream of the flow measuring device

described in 4.3 shall not exceed 40 °C.
4.5 Gas temperature measuring devices

These shall be positioned adjacent to the flow measuring device. A suitable device is a 1,5 mm diameter

sheathed thermocouple orientated vertically with its measuring junction located at the centre line of

the measuring duct and at a distance equal to twice the diameter of the measuring duct downstream

from the flow measuring device. A similar thermocouple may be located at the exit from the connecting

duct plenum for information purposes only (see Figure 1).
4.6 Exhaust fan system

This shall be capable of controlling the flow rates and maintaining the specified pressure differential

between the connecting duct and the furnace when the non-mechanical fire barrier is closed under fire

conditions.

The 300 Pa (or higher if applicable) pressure differential shall be regulated by a suitable control system.

The pressure shall be controlled to within ± 5 % of the specified value.
5 Test conditions

The heating conditions and the furnace atmosphere shall conform to those given in EN 1363-1, or if

applicable, EN 1363-2.

The furnace pressure shall be controlled to EN 1363-1, except in the case of testing non-mechanical fire

barriers installed in a vertical separating element when the pressure shall be controlled to (15 ± 3) Pa

at mid height of the non-mechanical fire barrier. If two or more such non-mechanical fire barriers are

being tested simultaneously, this pressure shall be established at mid height of the lower non-

mechanical fire barrier.

For non-mechanical fire barriers installed in a horizontal separating element the pressure shall be

controlled to (20 ± 3) Pa at 100 mm below the underside of the separating element to which it is fixed.

Details of pressure conditions within the connecting duct are given in 9.2.
6 Test specimen
6.1 Size

For the fire test, see 10.2, the maximum size of non-mechanical fire barrier shall be tested. If this is

made from sections, the maximum number of sections with all their framework (transoms and

mullions) shall be tested.
6.2 Number of tests
6.2.1 General
The number of tests depends on various factors.
• Supporting construction;
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SIST EN 1366-12:2014+A1:2020
EN 1366-12:2014+A1:2019 (E)
• method of installation in the supporting construction;
• method of installation on to the supporting construction;
• method of installation away from the supporting construction.

It may be seen that there are considerable combinations of supporting constructions, installation

methods etc. and this leads to a large number of tests.

Reference should be made to the extended field of application standard before starting a test program

as careful consideration of this may reduce the number of tests that need to be completed. It is

advisable that this is done in conjunction with a notified body or test authority.

6.2.2 Supporting construction

Typical supporting constructions would be masonry walls, blockwork walls, dry walls, concrete floors

etc. Other supporting constructions may be available and these should be used if it is proposed that the

non-mechanical fire barrier be tested in conjunction with them.
6.2.3 Method of installation in the supporting construction

Each method proposed for installation in each supporting construction shall be tested. The non-

mechanical fire barrier shall be tested both ways round.

NOTE There were many discussions on symmetry in the revision and development of this standard. It proved

impossible to define symmetry in an objective way to allow all test or authorizing bodies to apply rules in a similar

way, particularly in the case of installation in the supporting construction. Also to be considered was where the

non-mechanical fire barrier was installed in the depth of the wall and so on. The concept of symmetry has been

removed from the standard.
6.2.4 Method of installation on to the supporting construction

Each method proposed for installation on to each supporting construction shall be tested. One test shall

be undertaken with the non-mechanical fire barrier inside the furnace and one test undertaken with the

non-mechanical fire barrier outside the furnace. The face of the non-mechanical fire barrier to be

presented to the supporting construction shall be clearly identified so that in cannot be installed the

wrong way round on site. If it is to be allowed to be installed either way round it shall be tested both

ways round inside the furnace and both ways round outside the furnace.

In the case of an uninsulated non-mechanical fire barrier fixed in this manner, only a barrier on the

inside of the furnace needs to be tested, as this is considered to be to the most onerous condition.

6.2.5 Method of installation away from the supporting construction

Each method proposed for installation away from each supporting construction shall be tested. One test

shall be undertaken with the non-mechanical fire barrier inside the furnace and one test undertaken

with the non-mechanical fire barrier outside the furnace. The face of the non-mechanical fire barrier on

the side of the supporting construction shall be clearly identified so that in cannot be installed the

wrong way round on site. If it is to be allowed to be installed either way round it shall be tested both

ways round inside the furnace and both ways round outside the furnace.

In addition to the largest size, when testing on the outside of the furnace only, a non-mechanical fire

barrier of the smallest size shall be tested. This is to prove closure when restricted exposure is given to

the radiant heat of the furnace.

The method of support of the ductwork through the supporting construction shall be clearly defined as

this will form part of the installation method
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SIST EN 1366-12:2014+A1:2020
EN 1366-12:2014+A1:2019 (E)
6.3 Design
6.3.1 General

The test shall be made on a test specimen representative of the assembly on which information is

required. The general test layouts and equipment references are shown in Figures 1 and 2 for walls and

floors respectively.
6.3.2 Orientation to be tested

Non-mechanical fire barriers which are to be installed in both horizontal and vertical constructions

shall be tested in both orientations. Non-mechanical fire barriers which may be installed vertically but

in different design orientations shall be tested in both orientations – e.g. slots vertical and slots

horizontal.
6.3.3 Non-mechanical fire barriers installed within a wall or floor opening

Non-mechanical fire barriers which are to be installed within an opening in line with a wall or floor

shall be tested as generally shown in Figure 3.
6.3.4 Non-mechanical fire barriers mounted on to the face of a wall or floor

Non-mechanical fire barriers which are to be installed mounted on to the face of a wall or floor shall be

tested as generally shown in Figures 4 and 5.

Uninsulated non-mechanical fire barriers which are to be mounted onto the face of a wall or floor shall

be tested with the non-mechanical fire barrier positioned within the furnace.

Insulated non-mechanical fire barriers which are to be mounted onto the face of a wall or floor shall be

tested from both sides so that the insulation properties of the non-mechanical fire barrier body, and

where appropriate the duct, can be evaluated. Non-mechanical fire barriers which can be mounted

above or below the floor shall be te
...

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