-50% discount* If you buy the same UNE standard in different languages. * Discount on the lower pvp.

EN 13381-11:2026

Test methods for determining the contribution to the fire resistance of structural members - Part 11: Applied reactive protection to solid steel bars in tension based on mechanically loaded fire tests

Edition date: 2026-04-22
In Force
Available languages: English, French
Summary: This document describes the test and assessment procedure for determining the contribution of reactive fire protection systems to the fire resistance of solid steel bars used as tension members, when exposed to the standard temperature/time curve specified in EN 1363-1. In special circumstances, where specified in National Building Regulations, there can be a need to subject reactive fire protection systems to a slow heating curve (smouldering fire) as defined in EN 1363-2. The corresponding test and assessment procedure are described in Annex E. The fire protection performance is determined by testing mechanically loaded steel bars in horizontal orientation. Information regarding the testing of additional unloaded specimens is given to assess the influence of the bar orientation and smouldering fire behaviour. The principles of the testing and assessment procedure can also be applied for other section shapes such as angles, channels and flats. This document does not include steel bars used as reinforcement in concrete construction. The document is applicable to steel bars up to a maximum diameter of 130 mm. In the case of rectangular bars, the maximum edge length shall be limited to 130 mm with a maximum aspect ratio of 2:1 against the shorter edge length. The test programme and the assessment are designed to cover: - a range of valid fire protection classification periods; - a range of thickness of the applied reactive fire protection system; - a range of steel bar dimensions and profiles; - a range of specified design temperatures; - a range of load utilisation factors in case of fire; - a range of bar orientation. This document also provides the assessment procedure, which prescribes how the analysis of the test data shall be made and gives guidance on the procedures by which interpolation shall be undertaken. The assessment procedure is used to establish: a) on the basis of data derived from mechanically loaded testing steel bar, any practical constraints on the use of the reactive 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 reactive 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 permitted direct application of the results to different steel types and sizes over the range of thicknesses of the applied reactive fire protection system tested.

Le présent document décrit le mode opératoire d'essai et d'évaluation permettant de déterminer la contribution des systèmes de protection réactive contre le feu à la résistance au feu des barres en acier pleines utilisées comme éléments précontraints, lorsqu'elles sont exposées à la courbe de température/temps normalisée spécifiée dans l'EN 1363 1. Dans des circonstances particulières, lorsque cela est spécifié dans le National Building Regulations (Règlement national du bâtiment), il peut être nécessaire de soumettre les systèmes de protection réactive contre le feu à une courbe d'échauffement lent (feu à combustion lente) telle que définie dans l'EN 1363 2. Le mode opératoire d'essai et d'évaluation correspondant est décrit à l'Annexe E. La performance de protection contre le feu est déterminée par l'essai des barres en acier soumises à une charge mécanique dans une direction horizontale. Des informations concernant l'essai d'éprouvettes supplémentaires non soumises à une charge sont données pour évaluer l'influence de la direction de la barre et le comportement du feu à combustion lente. Les principes de la procédure d'essai et d'évaluation peuvent également être appliqués à d'autres formes de sections telles que cornières, profils U et plates. Le présent document n'inclut pas les barres en acier utilisées comme armatures dans les constructions en béton. Le document s'applique aux barres en acier jusqu'à un diamètre maximal de 130 mm. Dans le cas des barres rectangulaires, la longueur maximale du bord est limitée à 130 mm avec un rapport d'aspect maximal de 2:1 par rapport à la longueur du bord la plus courte. Le programme d'essai et l'évaluation sont conçus pour couvrir : - une gamme de périodes de classification de la protection contre le feu valables ; - une gamme d'épaisseurs du système de protection réactive contre le feu appliqué ; - une gamme de dimensions et de profilés de barres en acier ; - une gamme températures de calcul spécifiées ; - une gamme de facteurs d'utilisation de la charge en cas d'incendie ; - une gamme de direction de la barre. Le présent document fournit également la procédure d'évaluation, qui prescrit la manière dont l'analyse des données d'essai est effectuée et donne des recommandations sur les procédures d'interpolation. La procédure d'évaluation est utilisée pour établir : a) sur la base des données obtenues à partir d'une barre en acier d'essai soumise à une charge mécanique, toutes les contraintes pratiques liées à l'utilisation du système de protection réactive contre le feu dans les conditions de l'essai au feu (la performance physique) ; b) sur la base des données de température obtenues à partir d'une barre en acier d'essai, les propriétés thermiques du système de protection réactive contre le feu (la performance thermique). Les limites d'applicabilité des résultats de l'évaluation résultant de l'essai au feu sont définies de même que l'application directe autorisée des résultats à différents types et tailles d'acier dans la gamme d'épaisseurs du système de protection réactive contre le feu appliqué soumis à l'essai.

Dieses Dokument beschreibt das Prüf- und Beurteilungsverfahren für die Bestimmung des Beitrags reaktiver Brandschutzsysteme zum Feuerwiderstand geschlossener Stahlstäbe, die als Elemente unter Zugbeanspruchung verwendet werden, wenn sie der in EN 1363 1 festgelegten Norm-Temperatur/Zeitkurve ausgesetzt sind. Unter besonderen Umständen, soweit in der nationalen Bauordnung festgelegt, kann es erforderlich sein, ein reaktives Brandschutzsystem einer langsamen Erhitzungskurve (Schwelbrand) nach EN 1363 2 auszusetzen. Die entsprechenden Prüf- und Beurteilungsverfahren werden in Anhang E beschrieben. Das Brandschutzverhalten wird durch Prüfung mechanisch beanspruchter Stahlstäbe in horizontaler Ausrichtung geprüft. Informationen zur Prüfung zusätzlicher unbeanspruchter Probekörper werden bereitgestellt, um den Einfluss der Ausrichtung des Stabs und das Schwelbrandverhalten zu beurteilen. Die Grundsätze des Prüf- und Beurteilungsverfahrens können außerdem auf andere Profilformen wie etwa Winkel, Kanäle und Flachstahl angewendet werden. Dieses Dokument beinhaltet keine Stahlstäbe, die in Betonkonstruktionen als Bewehrung eingesetzt werden. Das Dokument ist auf Stahlstäbe mit einem maximalen Durchmesser von 130 mm anwendbar. Im Fall rechteckiger Stäbe ist die maximale Kantenlänge auf 130 mm beschränkt und das maximale Seitenverhältnis gegenüber der kürzeren Seitenlänge muss 2 : 1 betragen. Das Prüfprogramm und die Beurteilung dienen dazu, Folgendes abzudecken: - einen Bereich gültiger Brandschutzklassifizierungs-Zeitspannen; - einen Dickebereich des angewendeten reaktiven Brandschutzsystems; - einen Bereich von Maßen und Profilen des Stahlstabs; - einen Bereich festgelegter Bemessungstemperaturen; - einen Bereich von Auslastungsfaktoren im Brandfall; - einen Bereich von Stabausrichtungen. Dieses Dokument beschreibt auch ein Beurteilungsverfahren, das vorschreibt, wie die Analyse der Prüfdaten durchzuführen ist und bietet eine Anleitung zu den Verfahren für die Interpolation. Ziel des Beurteilungsverfahrens ist es: a) mit Hilfe von durch Prüfung von mechanischen beanspruchten Stahlstäben ermittelten Prüfdaten Einschränkungen in der praktischen Anwendbarkeit des reaktiven Brandschutzsystems unter Brandbeanspruchung festzulegen (das physikalische Verhalten); b) mit Hilfe von durch Prüfung von Stahlstäben ermittelten Temperaturmesswerten die thermischen Eigenschaften des reaktiven Brandschutzsystems zu bestimmen (thermische Leistungsfähigkeit). Die Anwendungsgrenzen der aus Feuerprüfungen ermittelten Ergebnisse der Bewertung sowie die direkte Übertragbarkeit der Ergebnisse auf unterschiedliche Stahlarten und -größen für die verschiedenen Dicken des geprüften Brandschutzsystems werden festgelegt.
ICS: 13.220.50-Fire-resistance of building materials and elements
CTN: CEN/TC 127 - 6109

The book in the author's words

Ultricies magna feugiat malesuada sociosqu varius vivamus cubilia parturient, himenaeos vitae vehicula nam placerat netus urna platea, nostra rutrum felis mattis penatibus velit quisque.
Frequently Asked Questions Do you have any questions about our products?
  • Standards UNE, EN, ISO, IEC, BSI, DIN, ASTM, AFNOR, IEEE, SAE
  • In addition, you can request the rules of the rest of the organizations through the e-mail normas@aenor.com
  • Technical books on paper and in electronic format (PDF, epub).

The standards can be purchased in PDF, reading or paper. The reading standards are not download files, they can only be viewed in the client area. The standards ordered on paper and some of the books in the catalogue are printed on demand. 

Check deadlines in normas@aenor.com.

The license of use is for one user and one device, if you want to reproduce the content of the standard, you must request a license that will have an additional cost. Send us your inquiry here 

 

The use of standards and other content protected by intellectual property rights in AI systems is prohibited. If you are interested in such uses, please contact normas@aenor.com. Failure to comply will result in the withdrawal of your Access licence.

The AENOR standards and books that appear in the online store can only be purchased exclusively through the website. AENOR does not have a physical store.

Purchase procedure: by clicking on "Buy" the desired products will go to the shopping cart. If there are display problems, the recommended browser is Chrome.

To formalize the purchase you must access the customer area. If you are not registered as a customer, you must fill in a form with the data along with a password and username. This will create the account.

Once the "Customer data" form has been completed, "Order in progress" will be displayed with all the items loaded in the shopping cart, their prices, taxes established in current legislation and shipping costs if applicable.

The prices of the standards and books that appear in the various sections do not include taxes or shipping costs.

AENOR promotional codes consist of alphanumeric characters and can only be applied to online purchases, received through a specific offer and for a limited time. To apply your promotional code, you just have to enter it in step 2 of 4 of the purchase process on the website and click on "apply", after you have identified yourself and chosen the payment methods. Promo codes are not cumulative.

 

  • Credit or debit card (Visa, Mastercard) and PayPal.
  • Bank transfer. If you opt for this form of payment, you must first send AENOR a copy of the transfer by email to normas@aenor.com
  • The purchase invoice can be downloaded from the customer area, in my previous orders

In the case of clients of companies based abroad, the taxpayer identification number of the corresponding country (for example, in Argentina the CUIT), must be filled in the CIF/NIF - VAT field .

  • Direct download via the website in the Customer Area. In the customer area, which can only be accessed with a password and username, the products purchased will be available for a period of fifteen days from the date of purchase, as long as the payment has been accepted. Files in digital format are protected and in no case editable. Before purchasing them, it is important that the license of use is read and accepted as a prior step to purchase.
  • Shipping by courier. Products purchased on physical media are shipped by courier. The maximum delivery time in Spanish territory, from the acceptance of the order by AENOR, is:
  •  Approximately seven working days for all standards purchased through the store in paper format.
  • Approximately three days for books purchased through the store. Stocks of paper books are limited and their offer on the website does not imply availability within the indicated period. In the event that the requested book is not available, the customer is notified of the delay in receiving the order, which will be approximately seven working days. 

For the rest of the products that are not on the website, check availability and delivery time at normas@aenor.com.

1. For digital products (PDF, Epub), once delivery has been made by direct download via the website in the Customer Area, you will not have the right to exercise your right of withdrawal.

2. For personalised products on paper, once the purchase has been made, you will not have the right to exercise your right of withdrawal.

3.  For all other paper products, you have the right to withdraw from the sale within 14 calendar days from the date of purchase. Remember that for the return it is essential that the product is in perfect condition, sealed by the packaging and preserving its original packaging. The customer will be responsible for pickup and shipping costs.

The order invoice includes shipping costs, so there is no amount to pay to the courier. Shipping costs are calculated based on both the final destination of the order and the number of products ordered. They include transport and packaging costs. Shipping costs are subject to periodic revisions. Outlet books will have free shipping costs only if the shipment is made in the Peninsula.

Destination Up to three standards and/or publications From three standards and/or publications
Peninsula 7,31€ 8,60€
Balearic Islands 18,04€ 23,34€
Canary Islands, Ceuta and Melilla  18,04€ 23,34€
Europe 59,17€ 80,07€
United States and Canada 70,07€ 96,94€
Rest of the world 91,94€ 115,91€
  • Purchases made by residents of the Member States of the European Union will be subject to the payment of VAT (value added tax).
  • ​​
  • In the case of legal persons and natural persons who, acting as entrepreneurs, are domiciled in a Member State of the European Union (except residents in Spain) and have an intra-community NIF/VAT registered in the VIES census, they will be exempt from paying VAT, being an essential condition the sending of this document by email to normas@aenor.com.
  • Purchases made in a private capacity (natural person), regardless of where they have their residence, will be subject to the payment of VAT.
  • Purchases made by entities in non-EU countries will be exempt from paying VAT, as long as they send the corresponding tax residence document by email to normas@aenor.com.
  • The sale operations will be understood to have been carried out at AENOR's registered office: Génova 6, 28004, Madrid – Spain. 

The contract for the purchase of products through this Website shall be governed by Spanish law. Any dispute arising out of or in connection with the use of the Website or such contract shall be subject to the exclusive jurisdiction of the Courts and Tribunals of Madrid.

Notwithstanding the foregoing, if you are entering into this contract as a consumer under the terms of Royal Decree 1/2007, nothing in this clause shall affect the rights that may be granted to you as such under applicable law.