Test methods for determining the contribution to the fire resistance of structural members - Part 10: Applied protection to solid steel bars in tension

This European Standard specifies a fire test method and an assessment procedure for determining the contribution of fire protection systems to the fire resistance performance of circular and rectangular steel bars used as tension members.
This Standard applies to fire protection materials that have already been tested and assessed in accordance with EN 13381 4 or EN 13381-8 unless all the testing is carried out in accordance with Annex B using a minimum length of 2 000 mm. If testing to EN 13381 4 or EN 13381-8 has not been carried out then loaded testing shall be carried out in accordance with Annex B.
For other section shapes such as angles, channels and flats, reference should be made to EN 13381 4 and EN 13381 8. This standard does not include steel or any other cold formed bar used as reinforcement in concrete construction.
For other solid bar geometries such as oval or triangular cross section, these should be subject to a separate test package in accordance with the principles of Clause 5 of this Standard.
Fire protection performance is determined by testing of unloaded tension members, although additional loaded test evidence may be required for certain product types subject to certain conditions specified in the Standard.
The method is applicable to all fire protection systems used for the protection of solid bar up to a maximum diameter of 130 mm and includes sprayed fire protection, reactive coatings, cladding protection systems and multi-layer or composite fire protection materials. In the case of rectangular bar, the maximum side length should be limited to 130mm with a maximum aspect ratio of 2:1 against the shorter side length. For dimensions greater than 130mm it is appropriate to use rectangular or circular hollow sections tested and assessed in accordance with EN 13381 4 and EN 13381 8 provided they have been tested in the same orientation.
The evaluation is designed to cover a range of thicknesses of the applied fire protection material, a range of steel bar dimensions, a range of specified temperatures and a range of valid fire protection periods.
The test method is applicable to fire protection systems which are intimately in contact with the bar, or which include an airspace between the bar and the protection system as given in EN 13381-4.
This standard also provides the assessment procedure, which prescribes the analysis of the test data and gives guidance on the procedures to undertake interpolation.
This Standard caters for testing in both vertical and horizontal orientations. Results from horizontally orientated bar may be applied to any orientation, whilst results from vertically orientated bar should only be used for horizontal bars when the data has been corrected in accordance with Annex C.
This standard gives the fire test procedures, carried out to provide data on the thermal characteristics of the fire protection system, when exposed to the standard temperature/time curve specified in Clause 5.1.1 of EN 1363 1.
The assessment procedure is used to establish:
a)   on the basis of data derived from testing steel bar, any practical constraints on the use of the fire protection system under fire test conditions (the physical performance);
b)   on the basis of the temperature data derived from testing steel bar the thermal properties of the fire protection system (the thermal performance).
The limits of applicability of the results of the assessment arising from the fire test are defined together with application of the results to different steel types and sizes over the range of thicknesses of the applied fire protection system tested.

Prüfverfahren zur Bestimmung des Beitrages zum Feuerwiderstand von tragenden Bauteilen - Teil 10: Brandschutzmaßnahmen für Stahl-Vollstäbe unter Zugbeanspruchung

Dieses Dokument legt ein Brandprüfverfahren und ein Bewertungsverfahren zur Ermittlung des Beitrages von Brandschutzsystemen zur Feuerwiderstandsfähigkeit von Stahlstäben mit rundem und rechteckigem Querschnitt, die als Zugglieder eingesetzt werden, fest.
Dieses Dokument gilt für Brandschutzmaterialien, die bereits nach EN 13381 4 oder EN 13381 8 geprüft und bewertet wurden.
Für Querschnitte mit einer anderen Form wie die von Winkel-, U- und Flachprofilen kann Bezug auf EN 13381 4 und EN 13381 8 genommen werden. Stahlstäbe und andere kaltgeformte Stäbe, die in Betonkonstruktionen als Bewehrung eingesetzt werden, sind nicht Gegenstand dieses Dokuments.
Auf Vollstäbe mit einer anderen geometrischen Form, wie einem ovalen oder dreieckigen Querschnitt, ist eine separate Prüfreihe in Übereinstimmung mit den Prinzipien von Abschnitt 5 dieses Dokuments anzuwenden.
Die Brandschutzwirkung wird durch Prüfung unbelasteter Zugglieder bestimmt, wobei jedoch unter gewissen, im Dokument beschriebenen Bedingungen zusätzliche Nachweise durch Prüfungen mit Belastung für bestimmte Produkttypen erforderlich sein können.
Das Verfahren ist auf alle Brandschutzsysteme anwendbar, die für den Schutz von Vollstäben mit einem Durchmesser von bis zu 130 mm verwendet werden, und umfasst aufgesprühte Brandschutzmaterialien, reaktive Beschichtungen, Fassadenverkleidungsschutzsysteme sowie mehrschichtige Brandschutz¬materialien oder Brandschutzsysteme aus Verbundwerkstoffen. Im Fall eines rechteckigen Stabs ist die maximale Seitenlänge auf 130 mm beschränkt und das maximale Seitenverhältnis gegenüber der kürzeren Seitenlänge muss 2 : 1 betragen. Bei Seitenlängen von mehr als 130 mm ist die Verwendung von runden oder rechteckigen Hohlprofilen angemessen, die nach EN 13381 4 und EN 13381 8 geprüft und bewertet wurden, sofern sie in der gleichen Orientierung geprüft wurden.
In die Bewertung einbezogen werden verschiedene Schichtdicken des angewendeten Brandschutzmaterials, verschiedene Stahlstabgrößen, verschiedene festgelegte Temperaturen sowie eine Bandbreite möglicher Feuerwiderstandsdauern.
Das Prüfverfahren ist anwendbar auf Brandschutzsysteme mit unmittelbarer Berührung zum Stab oder mit einem Luftraum zwischen Stab und Schutzsystem, wie in EN 13381 4 angegeben.
Dieses Dokument beschreibt auch ein Bewertungsverfahren, das die Analyse der Messwerte beinhaltet, und gibt eine Anleitung, wie Interpolationen durchzuführen sind.
Dieses Dokument deckt Prüfungen sowohl in vertikaler als auch horizontaler Anordnung ab. Ergebnisse für einen horizontal ausgerichteten Stab können auf jede Anordnung angewandt werden, während Ergebnisse für einen vertikal ausgerichteten Stab nur für horizontal angeordnete Stäbe verwendet werden, wenn die Daten entsprechend Anhang C korrigiert wurden.
Dieses Dokument enthält die Prüfverfahren für die Brandprüfungen, die zur Ermittlung der thermischen Eigenschaften des Brandschutzsystems bei Beanspruchung unter den Bedingungen der Einheitstemperatur¬zeitkurve nach EN 1363 1 durchgeführt werden.
Ziel des Bewertungsverfahrens ist es:
a) mit Hilfe von durch Prüfung von Stahlstäben ermittelten Messwerten Einschränkungen in der praktischen Anwendbarkeit des Brandschutzsystems unter Brandbeanspruchung festzulegen (Formverhalten);
b) mit Hilfe von durch Prüfung von Stahlstäben ermittelten Temperaturmesswerten die thermischen Eigenschaften des Brandschutzsystems zu bestimmen (thermische Leistungsfähigkeit).
Die Anwendungsgrenzen der aus Brandprüfungen ermittelten Ergebnisse der Bewertung sowie die Übertragbarkeit der Ergebnisse auf unterschiedliche Stahlarten und -größen für die verschiedenen Dicken des geprüften Brandschutzsystems werden festgelegt.

Méthodes d’essai pour déterminer la contribution à la résistance au feu des éléments de construction - Partie 10 : Protection appliquée aux barres d’acier pleines précontraintes (tirants)

Le présent document spécifie une méthode d’essai au feu et un mode opératoire d’évaluation permettant de déterminer la contribution des systèmes de protection au feu aux performances de résistance au feu des barres d’acier circulaires et rectangulaires utilisées comme éléments précontraints.
Le présent document s’applique aux matériaux de protection au feu qui ont déjà été soumis à essai et évalués conformément à l’EN 13381 4 ou à l’EN 13381 8.
Pour les autres formes de tronçon, comme les cornières, les profilés en U et les plats, il est possible de se référer à l’EN 13381 4 et à l’EN 13381 8. Le présent document n’inclut pas les barres d’acier ni autres barres profilées à froid utilisées comme renfort dans les constructions en béton.
Quant aux autres formes géométriques de barres pleines, par exemple de section ovale ou triangulaire, elles sont soumises à un lot d’essai séparé conformément aux principes de l’Article 5 du présent document.
Les performances de protection au feu sont déterminées par l’essai d’éléments non chargés, toutefois des résultats d’essai supplémentaires avec charge peuvent être requis pour certains types de produits soumis à certaines conditions spécifiées dans le présent document.
La méthode d’essai est applicable à tous les systèmes de protection au feu utilisés pour protéger les barres pleines jusqu’à un diamètre maximal de 130 mm et englobe les matériaux de protection au feu appliqués par projection, les revêtements réactifs, les systèmes de protection en plaque et les matériaux de protection au feu multicouches ou composites. Dans le cas d’une barre rectangulaire, la longueur de côté maximale est limitée à 130 mm avec un rapport de forme maximal de 2:1 par rapport à la longueur du côté le plus court. Pour les dimensions supérieures à 130 mm, il est approprié d’utiliser des tronçons creux rectangulaires ou circulaires soumis à essai et évalués conformément à l’EN 13381 4 et à l’EN 13381 8, à condition qu’ils aient été soumis à essai dans la même orientation.
L’évaluation est conçue pour couvrir une plage d’épaisseurs du matériau de protection au feu appliqué, une plage de dimensions de barres d’acier, une plage de températures spécifiées et une plage de durées de protection au feu valables.
La méthode d’essai est applicable aux systèmes de protection au feu qui se trouvent en étroit contact avec la barre ou qui comprennent un espace d’air entre la barre et le système de protection comme indiqué dans l’EN 13381 4.
Le présent document fournit également le mode opératoire d’évaluation qui prescrit l’analyse des données d’essai et donne des recommandations sur les modes opératoires permettant d’entreprendre une interpolation.
Le présent document couvre les essais dans les orientations à la fois verticales et horizontales. Les résultats issus de barres orientées à l’horizontale peuvent être appliqués à toutes les orientations, tandis que les résultats issus de barres orientées à la verticale ne sont utilisés pour les barres horizontales qu’après correction des données conformément à l’Annexe C.
...

Preskusne metode za ugotavljanje prispevka k požarni odpornosti konstrukcijskih elementov - 10. del: Ukrepi za zaščito napetih polnih jeklenih palic

General Information

Status
Published
Public Enquiry End Date
19-Dec-2018
Publication Date
18-Jun-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
25-May-2020
Due Date
30-Jul-2020
Completion Date
19-Jun-2020

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SLOVENSKI STANDARD
SIST EN 13381-10:2020
01-julij-2020
Preskusne metode za ugotavljanje prispevka k požarni odpornosti konstrukcijskih
elementov - 10. del: Ukrepi za zaščito napetih polnih jeklenih palic

Test methods for determining the contribution to the fire resistance of structural members

- Part 10: Applied protection to solid steel bars in tension
Prüfverfahren zur Bestimmung des Beitrages zum Feuerwiderstand von tragenden
Bauteilen - Teil 10: Brandschutzmaßnahmen für Stahl-Vollstäbe unter
Zugbeanspruchung

Méthodes d’essai pour déterminer la contribution à la résistance au feu des éléments de

construction - Partie 10 : Protection appliquée aux barres d’acier pleines précontraintes

(tirants)
Ta slovenski standard je istoveten z: EN 13381-10:2020
ICS:
13.220.50 Požarna odpornost Fire-resistance of building
gradbenih materialov in materials and elements
elementov
91.080.13 Jeklene konstrukcije Steel structures
SIST EN 13381-10:2020 en,fr,de

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

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SIST EN 13381-10:2020
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SIST EN 13381-10:2020
EN 13381-10
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2020
EUROPÄISCHE NORM
ICS 13.220.50; 91.080.13
English Version
Test methods for determining the contribution to the fire
resistance of structural members - Part 10: Applied
protection to solid steel bars in tension

Méthodes d'essai pour déterminer la contribution à la Prüfverfahren zur Bestimmung des Beitrages zum

résistance au feu des éléments de construction - Partie Feuerwiderstand von tragenden Bauteilen - Teil 10:

10 : Protection appliquée aux barres d'acier pleines Brandschutzmaßnahmen für Stahl-Vollstäbe unter

précontraintes (tirants) Zugbeanspruchung
This European Standard was approved by CEN on 14 March 2020.

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

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13381-10:2020 E

worldwide for CEN national Members.
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SIST EN 13381-10:2020
EN 13381-10:2020 (E)
Contents Page

European foreword ....................................................................................................................................... 4

Introduction ..................................................................................................................................................... 5

1 Scope .................................................................................................................................................... 6

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

3 Terms and definitions, symbols and units ............................................................................. 7

3.1 Terms and definitions .................................................................................................................... 7

3.2 Symbols and units............................................................................................................................ 8

4 Test equipment................................................................................................................................. 9

4.1 General ................................................................................................................................................ 9

4.2 Furnace ................................................................................................................................................ 9

5 Test procedures ............................................................................................................................... 9

5.1 General ................................................................................................................................................ 9

5.2 Support conditions .......................................................................................................................... 9

5.3 Number of test specimens ............................................................................................................ 9

5.4 Size of test specimens .................................................................................................................. 10

5.5 Construction of steel test specimens ..................................................................................... 10

5.5.1 Steel specification ......................................................................................................................... 10

5.5.2 Surface treatment and application of the fire protection material ............................ 10

5.6 Composition of fire protection materials ............................................................................ 10

5.6.1 General ............................................................................................................................................. 10

5.6.2 Thickness of applied reactive protection materials ........................................................ 10

5.7 Selection of test specimens ....................................................................................................... 10

6 Installation of the test specimens ........................................................................................... 12

6.1 Test specimen installation patterns ...................................................................................... 12

6.2 Installation of the steel bars ..................................................................................................... 13

6.3 Furnace Load .................................................................................................................................. 13

7 Conditioning of the test specimens ........................................................................................ 13

8 Application of instrumentation ............................................................................................... 13

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

8.2 Instrumentation for measurement and control of furnace temperature ................ 13

8.2.1 General ............................................................................................................................................. 13

8.2.2 Furnace temperature in the region of test specimens .................................................... 13

8.3 Instrumentation for the measurement of steel temperatures ..................................... 14

8.4 Instrumentation for the measurement of pressure ......................................................... 14

9 Test procedure .............................................................................................................................. 14

9.1 General ............................................................................................................................................. 14

9.2 Furnace temperature and pressure ....................................................................................... 14

9.3 Temperature of steelwork ........................................................................................................ 14

9.4 Observations .................................................................................................................................. 15

9.5 Termination of test ...................................................................................................................... 15

10 Test results...................................................................................................................................... 15

10.1 Acceptability of test results....................................................................................................... 15

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SIST EN 13381-10:2020
EN 13381-10:2020 (E)

10.2 Presentation of test results in the test report .................................................................... 15

11 Assessment ..................................................................................................................................... 16

11.1 General ............................................................................................................................................. 16

11.2 Assessment procedure for thermal performance ............................................................ 16

12 Report of the assessment .......................................................................................................... 16

13 Limits of the applicability of the results of the assessment .......................................... 17

13.1 General ............................................................................................................................................. 17

13.2 Range in fire protection thickness ......................................................................................... 17

13.3 Range in dimensions ................................................................................................................... 17

Annex A (normative) Linear interpolation analysis ....................................................................... 20

Annex B (normative) Loaded test .......................................................................................................... 26

B.1 General ............................................................................................................................................. 26

B.2 Test equipment ............................................................................................................................. 26

B.3 Test specimens .............................................................................................................................. 26

B.4 Application of instrumentation .............................................................................................. 26

B.5 Installation of test specimens .................................................................................................. 26

B.6 Application of load ....................................................................................................................... 26

B.7 Correction of data ........................................................................................................................ 27

Annex C (normative) Maximum thickness selection and stickability correction for

reactive coatings ........................................................................................................................... 28

Annex D (informative) A-deviations ..................................................................................................... 30

Bibliography ................................................................................................................................................. 31

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SIST EN 13381-10:2020
EN 13381-10:2020 (E)
European foreword

This document (EN 13381-10:2020) 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 November 2020, and conflicting national standards

shall be withdrawn at the latest by November 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 document is complementary and supportive to EN 13381-4 and EN 13381-8.

It is one of a series of standards for evaluating the contribution to the fire resistance of structural

members by applied fire protection materials. Other parts of this series are:
— Part 1: Horizontal protective members
— Part 2: Vertical protective members
— Part 3: Applied protection to concrete members
— Part 4: Applied passive protection to steel members

— Part 5: Applied protection to concrete/profile sheet steel and composite members

— Part 6: Applied protection to concrete filled hollow steel columns
— Part 7: Applied protection to timber members
— Part 8: Applied reactive protection to steel members
— Part 9: Applied fire protection systems to steel beams with web openings

All the above Standards were prepared under a standardization request given to CEN by the European

Commission and the European Free Trade Association. However, whilst this European Standard is

complimentary and supportive to EN 13381-4 and EN 13381-8, it falls outside of the scope of that

standardization request and its results cannot be used as a basis of any European Classification for

Resistance to Fire. It does, however, provide a valuable common basis for the fire protection industry

to evaluate products and for national authorities to determine a product’s suitability to provide an

appropriate level of fire protection to steel members in tension.

Attention is drawn to the A-deviation, in accordance with Annex E of the CEN/CENELEC Internal

Regulations Part 2:2017, granted to DIN by virtue of the evidence presented in Annex D that indicates

the existence of a conflicting national methodology supporting existing regulatory requirements in

Germany.

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,

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 13381-10:2020
EN 13381-10:2020 (E)
Introduction

The evaluation of a product's capability to provide fire protection performance to I or H section, or

hollow section, columns and beams is undertaken by test and assessment procedures detailed in

EN 13381-4 for passive (non-reactive) fire protection products and in EN 13381-8 for reactive

(intumescent) fire protection products.

The scopes of both the above standards specifically exclude the evaluation of solid bars used as tension

members. This document, therefore, provides supplementary test and assessment procedures to

those given in EN 13381-4 and EN 13381-8 to extend a product's scope of application to cover solid

circular or rectangular bars used as tension members. It is equally applicable to passive and reactive

fire protection products.

The evaluation represents an assessment of a product's fire insulation performance across a range of

solid circular and/or rectangular cross section bars on the basis of tests on unloaded specimens and

where appropriate loaded specimens. At the point of failure the strain generated on the bottom flange

of a loaded beam during testing to EN 13381-4 or EN 13381-8 is greater than that produced in circular

or rectangular bars in tension. Also, the strain generated during loaded column testing is similar to

that generated in circular or rectangular bars in tension.

In addition, recent testing of loaded and unloaded bars protected with reactive coatings has shown

that the benefit of a loaded test is very much dependant on product thickness; increased thickness of

product reduces the difference between loaded and unloaded testing. A minimum generic thickness

cannot be specified, however, as this is product dependent. Within EN 13381-8, product stickability is

determined from loaded beam and/or loaded column testing at intended maximum product thickness.

Therefore, where the scope of testing in this document uses lower thicknesses, then loaded testing in

accordance with Annex B should be carried out.

In all cases, the maximum protection thickness tested on unloaded bars should not be greater than the

maximum from loaded beams, columns or hollow columns tested to EN 13381-4 for passive fire

protection products or tested to EN 13381-8 for reactive fire protection products. If higher

thicknesses are required to provide any level of fire protection performance, then this should be

validated on the basis of testing loaded bars in accordance with Annex B of this document.

For passive fire protection products, similar loaded tests are only required when the system fixing

details to a tension member are not considered to fairly represent those used in the products

EN 13381-4 evaluation.

An appropriate supplementary loaded test is, therefore, included in this document as a Normative

Annex B to be applied only when required as detailed above.

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 can be evolved during the test. Mechanical and operational hazards

can also arise during the construction of test elements or structures, their testing and the 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 with the

manufacturer's health and safety product data sheet.

Appropriate training should be given to relevant personnel. Laboratory personnel should ensure that

they follow written safety instructions at all times.

The specific health and safety instructions contained within this document should be followed.

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SIST EN 13381-10:2020
EN 13381-10:2020 (E)
1 Scope

This document specifies a fire test method and an assessment procedure for determining the

contribution of fire protection systems to the fire resistance performance of circular and rectangular

steel bars used as tension members.

This document applies to fire protection materials that have already been tested and assessed in

accordance with EN 13381-4 or EN 13381-8.

For other section shapes such as angles, channels and flats, reference can be made to EN 13381-4 and

EN 13381-8. This document does not include steel or any other cold formed bar used as reinforcement

in concrete construction.

For other solid bar geometries such as oval or triangular cross section, these are subject to a separate

test package in accordance with the principles of Clause 5 of this document.

Fire protection performance is determined by testing of unloaded tension members, although

additional loaded test evidence can be required for certain product types subject to certain conditions

specified in the document.

The method is applicable to all fire protection systems used for the protection of solid bar up to a

maximum diameter of 130 mm and includes sprayed fire protection, reactive coatings, cladding

protection systems and multi-layer or composite fire protection materials. In the case of rectangular

bar, the maximum side length is limited to 130 mm with a maximum aspect ratio of 2:1 against the

shorter side length. For dimensions greater than 130 mm it is appropriate to use rectangular or

circular hollow sections tested and assessed in accordance with EN 13381-4 and EN 13381-8

provided they have been tested in the same orientation.

The evaluation is designed to cover a range of thicknesses of the applied fire protection material, a

range of steel bar dimensions, a range of specified temperatures and a range of valid fire protection

periods.

The test method is applicable to fire protection systems which are intimately in contact with the bar,

or which include an airspace between the bar and the protection system as given in EN 13381-4.

This document also provides the assessment procedure, which prescribes the analysis of the test data

and gives guidance on the procedures to undertake interpolation.

This document caters for testing in both vertical and horizontal orientations. Results from horizontally

orientated bar can be applied to any orientation, whilst results from vertically orientated bar are only

used for horizontal bars when the data has been corrected in accordance with Annex C.

This document gives the fire test procedures, carried out to provide data on the thermal

characteristics of the fire protection system, when exposed to the standard temperature/time curve

specified in EN 1363-1.
The assessment procedure is used to establish:

a) on the basis of data derived from testing steel bar, any practical constraints on the use of the fire

protection system under fire test conditions (the physical performance);

b) on the basis of the temperature data derived from testing steel bar the thermal properties of the

fire protection system (the thermal performance).

The limits of applicability of the results of the assessment arising from the fire test are defined

together with application of the results to different steel types and sizes over the range of thicknesses

of the applied fire protection system tested.
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SIST EN 13381-10:2020
EN 13381-10:2020 (E)
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 10025 (all parts), Hot rolled products of structural steels

EN 13381-4, Test methods for determining the contribution to the fire resistance of structural members

- Part 4: Applied passive protection to steel members

EN 13381-8, Test methods for determining the contribution to the fire resistance of structural members

- Part 8: Applied reactive protection to steel members
EN ISO 13943, Fire safety - Vocabulary (ISO 13943)
ISO 8421-2, Fire protection — Vocabulary — Part 2: Structural fire protection
3 Terms and definitions, symbols and units
3.1 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 1363-1, EN ISO 13943 and

ISO 8421-2, and the following apply.

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

• ISO Online browsing platform: available at https://www.iso.org/obp/
• IEC Electropedia: available at http://www.electropedia.org/
3.1.1
steel bar

circular or rectangular solid bar composed entirely of steel with a consistent cross sectional size

throughout its length
3.1.2
reactive fire protection material

reactive material which is specifically formulated to provide a chemical reaction upon heating such

that its physical form changes and in so doing provides fire protection by thermal insulative and

cooling effect
3.1.3
passive fire protection material

material which does not change its physical form on heating, providing protection by virtue of its

physical or thermal properties

Note 1 to entry: They may include materials containing water which, on heating evaporates to produce

cooling effects.
3.1.4
fire protection system

fire protection material together with any supporting system including mesh reinforcement and a

specified primer and top coat if applicable
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SIST EN 13381-10:2020
EN 13381-10:2020 (E)
3.1.5
fire protection

protection afforded to the steel member by the fire protection system such that the temperature of

the steel member is limited throughout the period of exposure to fire
3.1.6
test specimen
steel bar plus the fire protection system under test
3.1.7
fire protection thickness

thickness of a single layer fire protection system; or combined thickness of all layers of a multilayer

fire protection system; or mean dry film thickness of the fire protection coating excluding primer and

top coat

Note 1 to entry: The thickness of elements of the supporting system or joint cover strips are not included in

the fire protection thickness.
3.1.8
stickability

ability of a fire protection material to remain sufficiently coherent and in position for a well-defined

range of deformations, furnace and steel temperatures, such that its ability to provide fire protection

is not significantly impaired
3.1.9
maximum steel temperature
highest average temperature recorded at any measurement station
3.1.10
section factor

ratio of the fire exposed outer perimeter area of the steel bar per unit length, to its cross sectional

volume per unit length
3.2 Symbols and units
Symbol Unit Description
d mm intermediate protection thickness
int
d mm maximum protection thickness
max
d mm minimum protection thickness
min
interpolated thickness of fire protection material for a fire
d mm
performance period t
t min fire performance period
time for bar with the intermediate protection thickness to reach the
t min
int
required temperature
time for bar with the maximum protection thickness to reach the
t min
max
required temperature
time for bar with the minimum protection thickness to reach the
t min
min
required temperature
s mm required dimension
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SIST EN 13381-10:2020
EN 13381-10:2020 (E)
Symbol Unit Description
s mm intermediate dimension
int
s mm maximum dimension
max
s mm minimum dimension
min
Kd protection thickness range factor
K dimension range factor
D mm bar diameter
D mm minimum bar diameter
min
D mm maximum bar diameter
max
D mm intermediate bar diameter
int
4 Test equipment
4.1 General

The furnace and test equipment shall conform to that specified in EN 1363-1 where appropriate.

4.2 Furnace

The furnace shall permit the dimensions of the test specimens, their installation within the test

furnace and their exposure to heating to be as specified in EN 1363-1.
5 Test procedures
5.1 General

A number of steel bars, protected by the fire protection system, are heated in a furnace according to

the protocol given in EN 1363-1.

The tests shall be continued until the steel temperature reaches the maximum value commensurate

with application of the data.

Where several test specimens are tested simultaneously, care shall be taken that each is adequately

and similarly exposed to the specified test conditions.

The procedures given in EN 1363-1 shall be followed in the performance of this test unless specific

contrary instructions are given in this document.
The test sections shall be chosen to suit the scope of the assessment.
5.2 Support conditions

Unloaded steel bars shall be supported horizontally or vertically within the furnace such that they are

allowed to expand unrestrained.
5.3 Number of test specimens

For unloaded tests, there shall be 9 bars with dimensions to suit the scope of the assessment; the

principle of selecting the specimens shall be based on the details presented in 5.7. For loaded testing,

there shall be one loaded and one unloaded bar.
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SIST EN 13381-10:2020
EN 13381-10:2020 (E)
5.4 Size of test specimens

The steel bars for unloaded testing shall have a minimum exposed length of 1 000 mm. Steel bars

tested under load shall have an exposed length of 2 000 mm.
5.5 Construction of steel test specimens
5.5.1 Steel specification

The grade of steel used shall be any structural grade (S designation except S185) according to the

EN 10025 series.
The actual dimensions of the steel bar shall be measured.
5.5.2 Surface treatment and application of the fire protection material

The surface of the steel shall be prepared and the fire protection system shall be applied to the bars

in a manner representative of practice and in accordance with the manufacturer's recommendations.

5.6 Composition of fire protection materials
5.6.1 General
The composition, dimensions, verification and properties of the fire prot
...

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