oSIST prEN 15725:2022

Extended application reports on the fire performance of construction products and building elements

This European Standard gives the procedures for preparing reports on the extended application process using the results of reaction to fire tests, fire resistance tests and external fire exposure to roof tests undertaken for fire classification of products and product families in accordance with the various parts of EN 13501.
This standard makes reference to ‘extended application standards’ throughout; wherever this term is used it refers to either a standard prepared by CEN/TC 127 ‘Fire safety in buildings’ or the relevant product standard which includes information on extended application. In some cases, where a standard is not yet published, relevant bodies may issue recommendations for use by Notified Bodies in attestation procedures for CE marking under the Construction Products Directive (CPD), http://ec.europa.eu/enterprise/newapproach/nando/.
The European system currently permits extended application rules to be included in technical specifications. CEN Technical Committees and EOTA Working groups producing these rules are asked to seek the guidance of CEN/TC 127 to ensure that their rules comply with standards prepared by CEN/TC 127. In cases where extended application rules in harmonised EN product standards and ETAs do not comply with standards prepared by CEN/TC 127 the CEN BT shall be informed.

Berichte zum erweiterten Anwendungsbereich bezogen auf das Brandverhalten von Bauprodukten und Bauteilen

Dieses Dokument legt die Verfahren für die Anfertigung von Berichten über die Ermittlung der erweiterten Anwendung der Ergebnisse von Prüfungen zum Brandverhalten von Bauprodukten, von Feuerwiderstandsprüfungen oder von Prüfungen zur Beanspruchung von Bedachungen durch Feuer von außen fest, die für die Klassifizierung von Produkten und Produktfamilien nach den verschiedenen Teilen der Normenreihe EN 13501 durchgeführt wurden. Durch die EXAP-Regelungen wird die Anzahl an erforderlichen Prüfungen begrenzt, indem Methoden zur Bestimmung der Klassifizierung von Bränden eines Produktbereichs eingeführt werden (z. B. Produktbereich, größere Abmessungen usw.).
Die Grundüberlegung von EXAP sind sichere Methoden, die das gewünschte Verhalten bei Brandeinwirkung für das Produkt ermöglichen würden.
Dieses Dokument verweist durchweg auf „Normen zum erweiterten Anwendungsbereich“. Wo auch immer dieser Begriff angewendet wird, bezieht er sich auf eine andere durch CEN/TC 127 „Baulicher Brandschutz“ erarbeitete Norm, die Angaben zum erweiterten Anwendungsbereich einschließt. In einigen Fällen, in denen noch keine Norm veröffentlicht wurde, können die zuständigen Gremien Empfehlungen („recommendations“) geben, die die notifizierten Stellen bei Konformitätsbescheinungsverfahren für die CE-Kennzeichnung nach der Bauproduktenverordnung (BauPVO) anwenden können.
Das europäische System lässt gegenwärtig die Aufnahme von Regeln zum erweiterten Anwendungsbereich in Technischen Spezifikationen zu. Die Technischen Komitees von CEN und die Arbeitsgruppen von EOTA, die diese Regeln erarbeiten, sind aufgefordert, die Zuarbeit von CEN/TC 127 in Anspruch zu nehmen, um sicherzustellen, dass ihre Regeln den durch CEN/TC 127 erstellten Normen entsprechen. In Fällen, in denen die Regeln zum erweiterten Anwendungsbereich in harmonisierten europäischen Produktnormen (ENs) und in technischen Zulassungen (ETAs) nicht den von CEN/TC 127 erarbeiteten Normen entsprechen, wird das CEN/BT informiert.
Die EXAP-Norm umfasst nicht die Einarbeitung des Produkts in Bauwerke, die durch nationale Regeln begründet sind.
Gutachterliche Stellungnahmen sind ausgeschlossen.

Rapports d’application étendue des performances au feu des produits et éléments de construction

Le présent document indique les modes opératoires à suivre pour l’élaboration des rapports d’application étendue. Ces rapports s’appuient sur les résultats des essais de réaction au feu, de résistance au feu et d’exposition des toitures à un feu extérieur, entrepris pour le classement au feu des produits et des familles de produits, conformément aux diverses parties de l’EN 13501. Les règles
relatives aux applications étendues (extended application, EXAP) limitent le nombre d’essais requis grâce à la mise en oeuvre de méthodes destinées à déterminer le classement au feu d’une gamme de produits (par exemple, un assortiment de produits, des dimensions plus importantes, etc.).
Le critère fondamental d’une EXAP consiste à appliquer des méthodes sûres permettant d’obtenir les performances au feu requises pour le produit.
Le présent document fait référence aux « normes d’application étendue », chaque occurrence de ces termes renvoyant soit à une norme élaborée par le CEN/TC 127 « Sécurité incendie dans le bâtiment » soit à la norme de produit appropriée, laquelle inclut des informations concernant l'application étendue. Dans certains cas, lorsqu’une norme n’est pas encore publiée, les organismes pertinents
peuvent publier des recommandations destinées à être utilisées par les organismes notifiés pour l’attestation de conformité en vue du marquage CE au titre du Règlement relatif aux produits de construction (RPC).
Le système européen permet actuellement l’intégration des règles d’application étendue dans les Spécifications techniques. Les comités techniques du CEN et les groupes de travail de l’EOTA produisant ces règles doivent s’appuyer sur les recommandations du CEN/TC 127 afin de s’assurer que lesdites règles sont conformes aux normes élaborées par ce même comité. Lorsque les règles d’application étendue présentes dans les normes de produit harmonisées et les Agréments techniques européens ne sont pas conformes aux normes élaborées par le CEN/TC 127, le BT du CEN en est informé.
La norme EXAP ne couvre pas l’intégration du produit dans les ouvrages de construction justifiée par les règlements nationaux.
Les jugements d’expert sont exclus.

Poročila za razširjeno uporabo, ki se nanašajo na ognjevarne lastnosti gradbenih proizvodov in elementov stavb

General Information

• Status: Not Published
• Public Enquiry End Date: 27-Feb-2022
• ICS: 13.220.50 - Fire-resistance of building materials and elements
• Technical Committee: POZ - Požarna varnost
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 26-Dec-2021
• Due Date: 15-May-2022
• Completion Date: 01-Mar-2022
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Mandate: M/117 - Horizontal complement to the mandates to CEN/CENELEC concerning the execution of standardization work for the valuation of construction products and elements in respect of their resistance to fire
• Ref Project: prEN 15725 - Extended application reports on the fire performance of construction products and building elements

RELATIONS

• Revised: SIST EN 15725:2010 - Extended application reports on the fire performance of construction products and building elements
• Effective Date: 24-Aug-2016

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 15725:2022
01-februar-2022
Poročila za razširjeno uporabo, ki se nanašajo na ognjevarne lastnosti gradbenih
proizvodov in elementov stavb

Extended application reports on the fire performance of construction products and

building elements
Berichte zum erweiterten Anwendungsbereich bezogen auf das Brandverhalten von
Bauprodukten und Bauteilen

Rapports d’application étendue des performances au feu des produits et éléments de

construction
Ta slovenski standard je istoveten z: prEN 15725
ICS:
13.220.50 Požarna odpornost Fire-resistance of building
gradbenih materialov in materials and elements
elementov
oSIST prEN 15725:2022 en,fr,de

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

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oSIST prEN 15725:2022
DRAFT
EUROPEAN STANDARD
prEN 15725
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2021
ICS 13.220.50 Will supersede EN 15725:2010
English Version
Extended application reports on the fire performance of
construction products and building elements

Rapports d'application étendue des performances au Berichte zum erweiterten Anwendungsbereich

feu des produits et éléments de construction bezogen auf das Brandverhalten von Bauprodukten

und Bauteilen

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

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15725:2021 E

worldwide for CEN national Members.
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Contents Page

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

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

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

4.2 Minimum content of an EXAP standard .................................................................................................. 9

4.2.1 General................................................................................................................................................................ 9

4.2.2 Scope .................................................................................................................................................................... 9

4.2.3 Normative references .................................................................................................................................... 9

4.2.4 Terms and definitions ................................................................................................................................... 9

4.2.5 Technical justification on which the EXAP rule is based .................................................................. 9

4.2.6 General principles .......................................................................................................................................... 9

4.2.7 Use of test evidence: reference test - previously existing and justification............................... 9

4.2.8 Parameters / factor and rules (described in other parts of the standard) ................................ 9

4.2.9 Limitation ........................................................................................................................................................ 10

4.2.10 Combination of extended application rules ........................................................................................ 10

4.2.11 Annex ................................................................................................................................................................. 10

5.1 Role of extended application in the classification process ............................................................ 10

6.1 General.............................................................................................................................................................. 11

6.2 Direct field of application .......................................................................................................................... 11

6.2.1 Reaction to fire............................................................................................................................................... 11

6.2.2 Fire resistance ................................................................................................................................................ 11

6.2.3 External fire exposure to roofs ................................................................................................................ 11

6.3 Extended field of application .................................................................................................................... 12

6.3.1 General principles ........................................................................................................................................ 12

6.3.2 Reaction to fire............................................................................................................................................... 12

6.3.3 Fire resistance ................................................................................................................................................ 12

6.3.4 External fire exposure to roofs ................................................................................................................ 13

6.4 Combination of parameter variations ................................................................................................... 13

6.5 Procedure for undertaking extended application ............................................................................ 13

Annex A (informative) Format for an extended application report — Reaction to fire ................... 16

Annex B (informative) Format for an extended application report — Fire resistance .................... 19

Annex C (informative) Format for an extended application report — External fire exposure

to roofs .............................................................................................................................................................. 22

Bibliography ................................................................................................................................................................. 24

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European foreword

This document (prEN 15725:2021) has been prepared by Technical Committee CEN/TC 127 “Fire

safety in buildings”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 15725:2010.
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Introduction

A construction product and a building element may be placed on the market with different thicknesses,

densities, fixing conditions, substrates, etc. It is not practicable to test all combinations of different

product parameters for the reaction to fire performance or fire resistance or external fire exposure

performance, although these parameters may substantially influence the test result.

A building element is understood to be a defined construction component, e.g. wall, partition, floor, roof,

beam or column.

Fire test methods may not include any information on direct application, the result obtained in the test

is that which is reported. In a separate exercise it is possible to extend the field of application of the

individual test results to a variation of the values of the different product parameters. This process of

extended application uses rules which are essentially based on a worst case scenario and interpolation

techniques. There are a number of practical limitations on the size and design of elements that can be

tested by the standard methods of test for fire resistance. When these elements are larger, or are of a

modified design, there is a necessity to be able to confirm their performance, i.e. whether the

classification(s) given in the classification report in relation to the relevant criteria are maintained,

without the ability of being able to test them.
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1 Scope

This document gives the procedures for preparing reports on the extended application process using

the results of reaction to fire tests, fire resistance tests and external fire exposure to roof tests

undertaken for fire classification of products and product families in accordance with the various parts

of EN 13501. EXAPS rules limit the number of tests required by implementing methods to determine

the fire classification of a range of products (e.g; range of product, larger dimensions etc.).

The fundamental consideration of EXAP is safe methods that would allow to achieve the requested fire

performances for the product.

This document makes reference to ‘extended application standards’ throughout; wherever this term is

used it refers to either a standard prepared by CEN/TC 127 ‘Fire safety in buildings’ or the relevant

product standard which includes information on extended application. In some cases, where a standard

is not yet published, relevant bodies may issue recommendations for use by Notified Bodies in

attestation procedures for CE marking under the Construction Products Regulation (CPR).

The European system currently permits extended application rules to be included in technical

specifications. CEN Technical Committees and EOTA Working groups producing these rules are asked to

seek the guidance of CEN/TC 127 to ensure that their rules comply with standards prepared by

CEN/TC 127. In cases where extended application rules in harmonized EN product standards and ETAs

do not comply with standards prepared by CEN/TC 127 the CEN BT are informed.

The EXAP Standard does not cover the incorporation of the product into the construction works that is

justified by a national rules.
Expert judgements are excluded.
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 13238:2010, Reaction to fire tests for building products - Conditioning procedures and general rules

for selection of substrates

EN 13501-1:2018, Fire classification of construction products and building elements - Part 1:

Classification using data from reaction to fire tests

EN 13501-5:2016, Fire classification of construction products and building elements - Part 5:

Classification using data from external fire exposure to roofs tests

CEN/TS 16459:2019, External fire exposure of roofs and roof coverings — Extended application of test

results from CEN/TS 1187
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3 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
classification

process whereby the fire performance parameters obtained from the results of one test, or a set of tests,

or from a process of extended application, are compared with limiting values for those parameters that

are set as criteria for achieving a certain classification
Note 1 to entry: This process is defined in EN 13501.

Note 2 to entry: The relevant classes and related criteria are specified in the following Commission Decisions:

a) Resistance to fire:
1) EC Decision 2000/367/EC (OJEU L 133 of 6.6.2000) as amended by EC
Decision 2003/629/EC (OJEU L 218 of 30.8.2003);

2) 2011/232/EU: Commission Decision of 11 April 2011 amending Decision 2000/367/EC

establishing a classification system for resistance-to-fire performance for construction products,

construction works and parts thereof.
b) Reaction to fire:
1) 2016/364: COMMISSION DELEGATED REGULATION (EU) of 1 July 2015 on the

classification of the reaction to fire performance of construction products pursuant to Regulation (EU)

No 305/2011 of the European Parliament and of the Council;
2) EC Decision 2000/147/EC (OJEU L 50 of 23.2.2000) as amended by EC Decision

2003/632/EC (OJEU L 220 of 3.9.2003) and by EC Decision 2006/751/EC (OJEU L 305 of 4.11.2006).

c) External fire performance for roofs:
1) EC Decision 2001/671/EC (OJUE L 235 of 4.9.2001) as amended by EC Decision
2005/823/EC (OJEU L 307 of 25.11.2005).
3.2
product
material, element or component about which information is required
[SOURCE: EN 13501-1:2007+A1:2009]
3.3
product family

range of products within defined limits of variability of the product parameters and, if relevant, end use

parameters, for which the fire performance remains unchanged (i.e. does not get worse)

Note 1 to entry: Product family is only defined on technical basis
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3.4
product parameter

aspect of a product (for example thickness, composition, density) which can vary and which may or may

not have an influence on the product’s fire performance
3.5
building element
building element is understood to be a defined construction component
Note 1 to entry: e.g. wall, partition, floor, roof, beam or column.
3.6
end use application

real application of a product, in relation to all aspects that influence the behaviour of that product under

different fire situations

Note 1 to entry: It covers aspects such as its quantity, its orientation, its position in relation to other adjacent

products and its method of fixing
[SOURCE: TS 15117:2005]
3.7
end use condition
way in which the product is incorporated into the building

Note 1 to entry: e.g. jointing, fixing and position with respect to adjacent products

Note 2 to entry: The mounting and fixing conditions for testing reflect the end use conditions.

3.8
test result

outcome of a testing process and its associated procedures detailed within a specific test standard

(which can include some processing of the results from the testing of a number of specimens) and

expressed in terms of one or more fire performance parameter(s)
3.9
direct field of application of test results

outcome of a process (involving the application of defined rules) whereby a test result is deemed to be

equally valid for variations in one or more of the product properties and/or intended end use

applications
3.10
extended field of application of test results

outcome of a process (involving the application of the defined rules in EXAP standards that may

incorporate calculation procedures) that predicts, for a variation of a product property and/or its

intended end use application(s), a test result on the basis of one or more test results to the same test

standard

Note 1 to entry: It could be based on additional test measurement requested by EXAP and performed during

the test
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3.11
extended application report

document reporting extended application results, including all details of the process leading to those

results
3.12
calculation

method that can be applied to one or more parameters of a result of a test which is based on existing

physical laws or which has been empirically validated and which forms part of the process of defining

the extended application
3.13
constructional parameter

design and construction that may be varied and which may result in a change in the fire resistance

performance, e.g. in a stud framed separating element a change in the dimensions of a stud

3.14
thermal and mechanical parameters

conditions of a test that may influence the classification given, e.g. the pressure differential that will

exist at the top of a larger element than existed at the top of the specimen when tested

3.15
factor

variation that may be applied to a parameter, e.g. a change in the stiffness as a result of a dimensional

change in the stud
3.16
factor influence

potential cause of a change in the fire resistance when the factor is changed, e.g. an increase in the

loadbearing capacity R as a result of an increase in stiffness
3.17
evidence
3.17.1
primary evidence

evidence generated from tests carried out only to European Technical specification which is the base of

the extended application process
3.17.2
secondary evidence(s)

evidence(s) generated from tests carried out only to European Technical specification which is (are)

supplementary evidence provided for the extended application process
4 Extended application Standards
4.1 General

An extended application standard shall on principle be based on a sufficient number of relevant tests

evidence and common scientific interpretation.

The test must have been performed according to the relevant EN test standard and can be

complemented by other testing methods or by calculation or demonstration of possible extrapolation.

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Background information, such as test performed on a previous version of the standard can be

considered for the purpose of the justification of the proposed rules.
4.2 Minimum content of an EXAP standard
4.2.1 General

In addition to the chapter requested in every standard by the CEN rules the following recommendation

are specified.
4.2.2 Scope

The scope of the EXAP standard shall specify that it will provide guidance and rules to a type of product

in order to extend the application of the available test results.

The scope shall specify the type of product covered and when relevant the type of products not covered.

4.2.3 Normative references

The paragraph on normative references shall follow the CEN rules and shall list the standard referenced

to in the document.
4.2.4 Terms and definitions

The paragraph on terms and definitions shall follow the CEN rules and shall list the term and references

referenced to in the document.
4.2.5 Technical justification on which the EXAP rule is based

A description of the evidence considered and their justification shall be presented in the standard

and/or when relevant a bibliography shall be added to the standard.

The objective of the justification shall be considered in a way that the application of the EXAP rule shall

be repeatable and reproducible and shall not give room for interpretations.
The Technical procedure shall be supported by technical data or calculation.

Each EXAP standard shall provide in an annex the technical justification for the rules. (e.g. background

document as used for EUROCODES).
4.2.6 General principles

The general principle shall specify the level of expertise requested to perform the EXAP evaluation.

4.2.7 Use of test evidence: reference test - previously existing and justification

Test evidence must follow rules for Primary and secondary evidence for undertaking extended

application.
4.2.8 Parameters / factor and rules (described in other parts of the standard)

The set of rules shall be expressed in a shape of a table gathering the parameters/factors to be taken

into account.
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Table 1 — Example of table
Construction Factor/Variation Influence of Limitation Rules
parameter Factor/variation on see clause:xxx
performance
characteristic
(R,E,I,S…)

If the EXAP standard on which is based the EXAP report contain parameter and rules in the shape of

chaptering, it is mandatory to use this chaptering in the EXAP report.
4.2.9 Limitation
The EXAP standard shall declare any limitations.
4.2.10 Combination of extended application rules

The EXAP standard shall provide justification and/or limitations of the combination of any rules.

4.2.11 Annex

The annex shall contain the technical justification of the define rules including a detailed description of

the supporting data.
5 Extended application reports
5.1 Role of extended application in the classification process

There are two possible routes to obtaining a fire classification. The first one is to undertake fire tests in

accordance with the relevant EN fire test methods given in one of the parts of EN 13501. From the test

report(s) obtained, a classification report can be prepared. The second one refers to an extended

application using test reports and other relevant data, and carried out in accordance with the relevant

EN extended application standard. From this process an extended application report is prepared in

conformity with this standard.

An extended application report is used, like a test report as a basis for preparing a classification report.

This process is illustrated in Figure 1.
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Figure 1 — Role of extended application in the fire classification process
6 Principles of establishing the field of application
6.1 General

Following a fire test there are two fields of application that can be derived from the result, direct field of

application and extended field of application.
6.2 Direct field of application
6.2.1 Reaction to fire

Direct application of results from reaction to fire tests is undertaken in accordance

with EN 13501-1:2018 using results from the relevant EN classification test methods and taking into

account information on substrates given in EN 13238 and information in CEN/TS 15117 and any other

relevant European Technical Specification.
6.2.2 Fire resistance

The rules governing the direct field of application of results from fire resistance tests are given in the

individual test methods.
6.2.3 External fire exposure to roofs

The rules governing the direct field of application of results from external fire exposure to roof tests are

given in EN 13501-5:2016.
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6.3 Extended field of application
6.3.1 General principles

Extended application shall be undertaken by an organization accredited for the relevant fire test

according to EN ISO 17025 and having also carried out at least one test. If test data are to be used from

more than one organization, then the extended application may be undertaken by an organization

accredited for the relevant fire test and consultation shall be made with the other organization(s) that

performed the test.

When an EXAP Report requires the consideration of evidence from third parties (e.g. test reports, DIAP

reports, other EXAP reports, etc.), such evidence shall only be used when permission has been obtained

from the original sponsor/owner of that evidence. When negative evaluations are identified (EXAP

rules identified as providing the wrong conclusion when comparing to available test data), the

organization performing an EXAP evaluation shall provide to other organizations performing EXAP for

similar products the relevant information from these assessment.

Extended application shall be undertaken in accordance with the relevant EN extended application

standard. Extended application shall be based on test methods in accordance with the relevant

European Technical Specifications, which may be supplemented by:
— EN test standard;
— EN product standards;
— EN product standard;
— EAD;
— EC Decisions/ delegated acts;
— EN 13238;
— CEN/TS 15447;
— CEN/TS 15117.
6.3.2 Reaction to fire

Information on undertaking extended application from the results of reaction to fire tests and an

explanation of the influence of product and end use parameters on reaction to fire performance is given

in CEN/TS 15117.
6.3.3 Fire resistance
6.3.3.1 General

The extended field of application analysis is an additional process that has to be applied for and is not

granted automatically following a fire resistance test. An extended field of application analysis is

required when the application of the element differs from the test specimen and is not covered by the

direct field of application. Examples for the variations to be considered when performing an extended

application are identified in 6.3.3.2. Details of undertaking extended application of results of fire

resistance tests are covered in the relevant European standards for extended application and other

documents referred to in Figure 1. The methodology adopted in the prediction of fire resistance

performance is based on universally accepted rules, some of which incorporate calculation methods

and some of which may be common scientific interpretation set out in the relevant extended application

standard and other documents referred to in Figure 1. The basis of development of the rules varies

according to the different parameters relevant for different elements.

Primary and secondary evidence for undertaking extended application shall have been generated from

full tests carried out only to European Technical specification. Secondary evidence, e.g. indicative tests

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to ENs or prENs, may also be used in support of extended application in certain cases (see 6.3.1). The

acceptability of using indicative tests is given in the relevant extended application standard and varies

according to the different parameters relevant for different elements.
6.3.3.2 Variations considered in the extended application standards

Examples of aspects considered in preparing the extended application documents as given in Figure 1

are given below.
a) Examples of thermal and mechanical parameters:
1) the load on a load bearing element;
2) the boundary conditions applied to an element at its ends or edges;
3) the thermal action or the number of faces exposed;
4) the pressure differential due to height;
5) the mechanical impact (if appropriate);
6) the orientation of an element, e.g. a change from vertical to sloping.
b) Examples of constructional parameters:

1) the construction of the element (e.g. thickness) and the method or the materials used in the

construction of the element;

2) any change in the dimensions of the element (normally larger) from that tested to that under

consideration;

3) the introduction of, or any variations to, an aperture in a separating element;

4) the orientation of an asymmetric element in respect of the fire exposure.
6.3.4 External fire exposure to roofs

Information on undertaking extended application of the results from external fire exposure to roof tests

and an explanation of the influence of product and end use parameters on external fire exposure to

roofs performance is given in CEN/TS 16459.
6.4 Combination of parameter variations

An extended application analysis shall first of all consider each variation individually; the analysis shall

then consider the effect of combining several of the relevant variations in accordance with the rules of

the extended application standard.
6.5 Procedure for undertaking extended application

This is illustrated in Figure 2. The following steps shall be followed when undertaking extended

application analysis:
a) define the product family;
b) collect primary and secondary evidence(s) from the various sources;
c) collect authorization from the owner of these primary and
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