FprEN 1995-1-2
(Main)Eurocode 5 - Design of timber structures - Part 1-2: Structural fire design
Eurocode 5 - Design of timber structures - Part 1-2: Structural fire design
1.1 Scope of EN 1995 1 2
(1) This document deals with the design of timber structures for the accidental situation of fire exposure and it is intended to be used in conjunction with prEN 1995 1 1 and prEN 1991 1 2.
This document only identifies differences from, or supplements to, normal temperature design.
(2) This document applies to timber structures required to fulfil a loadbearing function, separating function or both.
(3) This document gives principles and application rules for the design of structures for specified requirements in respect of the aforementioned functions and the levels of performance.
(4) This document applies to structures, or parts of structures, that are within the scope of prEN 1995 1 1 and are designed accordingly.
(5) The methods given in this document are applicable to all products covered by harmonized technical specifications made reference to in this document.
1.2 Assumptions
(1) In addition to the general assumptions of EN 1990, the following assumptions apply:
- the choice of the relevant design fire scenario is made by appropriate qualified and experienced personnel, or is given by the relevant national regulation;
- any fire protection measure taken into account in the design will be adequately maintained.
Eurocode 5 - Bemessung und Konstruktion von Holzbauten - Teil 1-2: Tragwerksbemessung für den Brandfall
1.1 Anwendungsbereich der EN 1995 1 2
(1) Dieses Dokument regelt Entwurf, Berechnung und Bemessung von Holzbauwerken für die außergewöhnliche Situation einer Brandbeanspruchung und gilt in Verbindung mit prEN 1995 1 1 und prEN 1991 1 2.
Dieses Dokument bestimmt nur Unterschiede von oder Ergänzungen zur Bemessung unter Normaltemperatur.
(2) Dieses Dokument ist anwendbar für Holzbaukonstruktionen, die eine tragende Funktion, raumabschließende Funktion oder beides erfüllen müssen.
(3) Dieses Dokument enthält Grundsätze und Anwendungsregeln für die Bemessung von Tragwerken mit festgelegten Anforderungen hinsichtlich der vorgenannten Funktionen und Anforderungsklassen.
(4) Dieses Dokument gilt für Tragwerke oder Teile von Tragwerken, die in den Anwendungsbereich von prEN 1995 1 1 fallen und entsprechend bemessen werden.
(5) Die in diesem Dokument enthaltenen Verfahren sind auf alle Produkte, deren harmonisierte technische Spezifikationen auf dieses Dokument verweisen, anwendbar.
1.2 Annahmen
(1) Die folgenden Annahmen sind zusätzlich zu den allgemeinen Annahmen aus EN 1990 anwendbar:
- die Auswahl der relevanten Bemessungsbrandfälle erfolgt durch angemessen qualifiziertes und erfahrenes Personal oder wird durch die geltende nationale Vorschrift vorgegeben;
- jede bei der Gestaltung berücksichtigte Brandschutzmaßnahme wird angemessen aufrechterhalten.
Eurocode 5 - Calcul des structures en bois - Partie 1-2 : Calcul du comportement au feu
1.1 Domaine d'application de l'EN 1995 1 2
(1) Le présent document traite du calcul des structures en bois pour une situation accidentelle d'exposition au feu et doit être utilisé conjointement avec le prEN 1995 1 1 et le prEN 1991 1 2.
Le présent document identifie uniquement les différences avec le calcul à température normale, ou lui apporte des compléments.
(2) Le présent document s'applique aux structures en bois devant remplir une fonction porteuse, une fonction séparative ou les deux.
(3) Le présent document donne les principes et les règles d'application relatifs au calcul des structures par rapport aux exigences spécifiées eu égard aux fonctions mentionnées ci-dessus et aux niveaux de performances.
(4) Le présent document s'applique aux structures, ou aux parties de structures, relevant du domaine d'application du prEN 1995 1 1 et conçues en conséquence.
(5) Les méthodes données dans le présent document sont applicables pour tous les produits couverts par les spécifications techniques harmonisées qui sont référencées dans le présent document.
1.2 Hypothèses
(1) Outre les hypothèses de travail générales définies dans l'EN 1990, les hypothèses suivantes s'appliquent :
— le choix du scénario de feu de calcul pertinent est fait par un concepteur possédant une qualification et une expérience appropriées, ou est indiqué par la réglementation nationale concernée ;
— les mesures de protection contre l'incendie prises en compte dans le calcul font l'objet d'un entretien approprié.
Evrokod 5: Projektiranje lesenih konstrukcij - 1-2. del: Projektiranje požarnovarnih konstrukcij
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2023
Nadomešča:
SIST EN 1995-1-2:2005
Evrokod 5: Projektiranje lesenih konstrukcij - 1-2. del: Projektiranje požarnovarnih
konstrukcij
Eurocode 5 - Design of timber structures - Part 1-2: Structural fire design
Eurocode 5 - Bemessung und Konstruktion von Holzbauten - Teil 1-2:
Tragwerksbemessung für den Brandfall
Eurocode 5 - Calcul des structures en bois - Part 1-2: Calcul du comportement au feu
Ta slovenski standard je istoveten z: prEN 1995-1-2
ICS:
13.220.50 Požarna odpornost Fire-resistance of building
gradbenih materialov in materials and elements
elementov
91.010.30 Tehnični vidiki Technical aspects
91.080.20 Lesene konstrukcije Timber structures
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
prEN 1995-1-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2023
ICS 13.220.50; 91.080.20; 91.010.30 Will supersede EN 1995-1-2:2004
English Version
Eurocode 5 - Design of timber structures - Part 1-2:
Structural fire design
Eurocode 5 - Calcul des structures en bois - Part 1-2: Eurocode 5 - Bemessung und Konstruktion von
Calcul du comportement au feu Holzbauten - Teil 1-2: Tragwerksbemessung für den
Brandfall
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 250.
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, Türkiye 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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1995-1-2:2023 E
worldwide for CEN national Members.
prEN 1995-1-2:2023 (E)
Contents Page
European foreword . 6
0 Introduction . 7
1 Scope . 10
1.1 Scope of EN 1995-1-2 . 10
1.2 Assumptions . 10
2 Normative references . 10
3 Terms, definitions and symbols . 12
3.1 Terms and definitions . 12
3.2 Symbols and abbreviations . 15
3.2.1 Latin upper case letters . 15
3.2.2 Latin lower case letters . 16
3.2.3 Greek upper case letters . 20
3.2.4 Greek lower case letters . 21
4 Basis of design . 22
4.1 General. 22
4.2 Nominal fire exposure . 22
4.3 Physically based fire exposure . 23
4.4 Actions . 23
4.5 Design values of material properties . 23
4.6 Verification methods . 24
4.7 Member analysis . 25
4.8 Analysis of parts of the structure . 25
4.9 Global structural analysis . 25
5 Material properties . 26
5.1 General. 26
5.2 Thermal properties . 29
5.3 Mechanical properties . 29
5.4 Charring . 29
5.4.1 General. 29
5.4.2 The European charring model . 30
5.5 Adhesives . 40
5.5.1 General. 40
5.5.2 Bond line integrity of face bonds . 41
6 Tabulated design data . 41
6.1 General. 41
6.2 Time limits for charring phases . 41
6.3 Initially protected timber members . 44
6.4 Plane timber members made of CLT . 46
6.4.1 General. 46
6.4.2 CLT with bond line integrity maintained . 46
6.4.3 CLT with bond line integrity not maintained . 47
7 Simplified design methods . 49
7.1 General. 49
7.1.1 Materials and products covered . 49
prEN 1995-1-2:2023 (E)
7.1.2 Timber members . 50
7.1.3 Mechanically jointed members . 51
7.2 Effective cross-section method . 51
7.2.1 General . 51
7.2.2 Design of linear timber members . 53
7.2.3 Design of plane timber members . 56
7.2.4 Design of timber frame assemblies . 60
7.2.5 Design of timber-concrete-composite members . 69
7.3 Separating function method . 70
7.3.1 General . 70
7.3.2 Protection time . 72
7.3.3 Insulation time . 75
7.3.4 Position coefficients . 76
7.3.5 Joint coefficients. 79
7.3.6 Correction times . 80
8 Advanced design methods . 83
8.1 General . 83
8.2 Thermal analysis . 83
8.3 Mechanical analysis . 83
8.4 Validation of advanced design methods . 84
8.5 Thermal properties. 84
8.5.1 General . 84
8.5.2 Timber and wood-based materials . 85
8.5.3 Gypsum plasterboard and gypsum fibreboard . 88
8.5.4 Insulation materials . 89
8.6 Mechanical properties . 90
9 Connections . 92
9.1 General .
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.