prEN 15080-13

SLOVENSKI STANDARD
01-september-2009
Razširjena uporaba rezultatov preskusov požarne odpornosti - 13. del: Nosilni
stebri
Extended application of results from fire resistance tests - Part 13: Load bearing columns
Erweiterter Anwendungsbereich der Ergebnisse aus Feuerwiderstandsprüfungen - Teil
13: Tragende Stützen
Application étendue des résultats des essais de résistance au feu - Partie 13 : Poteaux
porteurs
Ta slovenski standard je istoveten z: prEN 15080-13
ICS:
13.220.50 Požarna odpornost Fire-resistance of building
gradbenih materialov in materials and elements
elementov
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
DRAFT
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2009
ICS
English Version
Extended application of results from fire resistance tests - Part
13: Load bearing columns
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 Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland 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
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15080-13:2009: E
worldwide for CEN national Members.

Foreword
This document (prEN 15080-13:2009) 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 has been prepared under a mandate given to CEN by the European Commission and
the European Free Trade Association, and supports essential requirements of EC Directive(s).
For relationship with EC Directive(s), see informative Annex ZA, which is an integral part of this
document.
This document is based on the draft for beams (prEN 15080-8).
Sections 1 to 6 are almost identical to the final version of prEN 15080-8.
Annex A, GUIDELINES FOR MAKING ASSESSMENTS has been taken directly from prEN 15080-8
with ‘beam’ changed to ‘column’ and some of the examples changed
Some of the figures contain text and do not yet conform to CEN rules.
The document needs:
An example of EXAP on a steel column
An example of EXAP on a concrete column
An example of EXAP on a timber column – Is this practical? Is this required?

Contents Page
Foreword . 2
1 Scope. 4
2 Normative references . 4
3 Terms and Definitions . 5
4 Basis and methodology of establishing the extended application . 6
4.1 General . 6
4.2 Basic principles . 6
4.2.1 General . 6
4.2.2 Basis of the extended application . 7
4.2.3 Mode of failure . 7
4.2.4 Methods of analysis . 7
4.3 Basic thermal analysis . 7
4.4 Basic structural analysis . 7
4.4.1 General . 7
4.4.2 Modelling factor . 8
4.4.3 Material properties . 9
4.5 Analysis of other features . 10
5 Critical parameters . 10
5.1 General. . 10
5.2 Common thermal parameters . 10
5.3 Common mechanical parameters . 10
5.4 Common constructional parameters . 10
5.5 Specific constructional parameters for columns without fire protection . 10
5.5.1 Concrete columns . 10
5.5.2 Steel columns . 11
5.5.3 Composite steel-concrete columns . 11
5.5.4 Timber columns . 12
5.5.5 Mechanically jointed timber columns . 12
5.5.6 Specific constructional parameters for columns with applied fire protection . 12
6 Report of the extended application analysis . 13
Annex A (informative) Guidelines for making assessment . 14
A.1 Mode of failure . 14
A.2 Effect of material strength . 15
A.3 Extrapolation of fire resistance . 15
A.4 Accuracy of predictions . 16
A.5 Prediction based on material laws . 17
A.6 Modifying predicted temperatures . 17
Annex B (informative) Background to the Scope . 19
Annex C (informative) Quantified extended application of composite steel concrete
columns . 21
C.1 Introduction . 21
C.2 Test Details . 22
C.3 Analysis of reference tests . 22
C.3.1 Thermal performance . 22
C.3.2 Structural performance . 24

1 Scope
This Part of EN 15080 identifies the parameters and factors that affect the fire resistance of columns,
when fully exposed to fire on all sides, and need to be taken into account when considering extended
application of results of columns tested in accordance with EN 1365-4. It also gives the methodology
to be used when preparing an extended application, including rules and calculation methods which
can be applied to establish the resultant influence of a variation in one or more parameters and to
determine the field of extended application.
2 Normative references
The following referenced documents are indispensable for the application 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 1363-2, Fire resistance tests — Part 2: Alternative and additional procedures
EN 1365-4, Fire resistance tests for load bearing elements — Part 3: Columns
EN 15080-1, Extended application of results from fire resistance tests — Part 1: General principles
EN 13502-2, Fire classification of construction products and building elements — Part 2: Classification
using data from fire resistance test (excluding products for use in ventilation systems)
EN 1992-1-2, Eurocode 2. Design of concrete structures — Part 1-2: General - Structural fire design
EN 1993-1-2, Eurocode 3. Design of steel structures — Part 1-2: General - Structural fire design
EN 1994-1-2, Eurocode 4. Design of composite steel and concrete structures — Part 1-2: General -
Structural fire design
EN 1995-1-1, Eurocode 5. Timber structures — Part 1-1: General — Common rules and rules for
buildings
EN 1995-1-2, Eurocode 5. Design of timber structures — Part 1-2: General — Structural fire design
EN 338, Structural timber — Strength classes
EN 1194, Glued laminated timber — Strength classes and determination of charactersitic values
EN 10025, Hot rolled products of non-alloy structural steels — Technical delivery conditions
EN 10080–1, Steel for the reinforcement of concrete — Weldable reinforcing steel — Part 1: General
requirements
EN 10138-1, Prestressing steels — Part 1: General requirements
ENV 13381-7, Contribution to fire resistance of structural members — Part 7: Timber elements
ISO 13943, Glossary of fire terms and definitions
3 Terms and Definitions
The definitions given in ISO 13943, EN 1363-1 and EN 1365-4 together with the following apply:
3.1
Test result
outcome of a testing process and its associated procedures detailed within EN 1365-4 (which may
include some processing of the results from the testing of a number of specimens). A test result is
expressed in terms of one or more fire performance parameter(s)
3.2
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
application(s)
NOTE The direct field of application of test results are presented in EN 1365-4.
3.3
extended field of application of test results
outcome of a process (involving the application of defined rules 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, i.e. to
EN 1365-4
3.4
classification
process defined in EN 13501-2, 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 The relevant classes and related criteria for fire resistance are specified in Commission Decisions
(2000/367/EC, 2000/147/EC and 2001/671/EC).
3.5
reference test
fire resistance test according to EN 1365-4 on a column from which the test result is used for the
process of extended application
NOTE There may be more than one reference test.
3.6
parameter
aspect of the reference scenario that may vary in practice and may result in a change of the fire
resistance performance
NOTE Examples are the load level and the height.
3.7
modelling factor
factor determined for a considered relevant structural failure mode on basis of the assessment of the
reference test(s), which takes into account the differences between the test results and calculated
results, and which is used to adjust the results of the extended application
3.8
Calculated structural resista
...