prEN 13084-2
(Main)Free-standing chimneys - Part 2: Concrete chimneys
Free-standing chimneys - Part 2: Concrete chimneys
This document specifies particular requirements and performance criteria for the design and construction of cast-in situ concrete chimneys as well as prefabricated concrete chimneys. It identifies requirements to ensure the mechanical resistance and stability of concrete chimneys in accordance with the general requirements given in EN 13084-1:2025.
As for chimneys attached to buildings the criteria given in Clause 1 of EN 13084-1:2025 apply.
Unless otherwise stated in the following clauses the basic standard for the design of concrete structures, EN 1992-1-1:2023 applies.
Freistehende Schornsteine - Teil 2: Betonschornsteine
Dieses Dokument behandelt die besonderen Anforderungen und Leistungskriterien für die Bemessung und Ausführung von Ortbeton-Schornsteinen und Fertigteil-Schornsteinen. Es gibt Anforderungen an, die die mechanische Festigkeit und Standsicherheit von Betonschornsteinen nach den in EN 13084-1:2025 angegebenen allgemeinen Anforderungen sicherstellen.
Für an Gebäuden abgestützte Schornsteine gelten die in EN 13084-1:2025, Abschnitt 1, angegebenen Kriterien.
Sofern es in den folgenden Abschnitten nicht anders angegeben ist, gilt die Grundnorm für die Bemessung von Betontragwerken, EN 1992-1-1:2023.
Cheminées autoportantes - Partie 2 : Cheminées en béton
Le présent document spécifie les exigences particulières et les critères de performances relatifs à la conception et à la construction des cheminées en béton coulée sur place et en béton préfabriqué. I identifie les exigences permettant de garantir la résistance mécanique et la stabilité des cheminées en béton conformément aux exigences générales de l’EN 13084-1:2025.
En ce qui concerne les cheminées attachées aux bâtiments, les critères de l’Article 1 de l’EN 13084-1:2025 s’appliquent.
Sauf indication contraire dans les articles suivants, la norme de base relative à la conception des structures en béton, à savoir l’EN 1992-1-1:2023, s’applique.
Prostostoječi dimniki - 2. del: Betonski dimniki
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2025
Prostostoječi dimniki - 2. del: Betonski dimniki
Free-standing chimneys - Part 2: Concrete chimneys
Freistehende Schornsteine - Teil 2: Betonschornsteine
Cheminées autoportantes - Partie 2 : Cheminées en béton
Ta slovenski standard je istoveten z: prEN 13084-2
ICS:
91.060.40 Dimniki, jaški, kanali Chimneys, shafts, ducts
91.100.30 Beton in betonski izdelki Concrete and concrete
products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2025
ICS 91.060.40 Will supersede EN 13084-2:2007
English Version
Free-standing chimneys - Part 2: Concrete chimneys
Cheminées autoportantes - Partie 2 : Cheminées en Freistehende Schornsteine - Teil 2: Betonschornsteine
béton
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 297.
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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13084-2:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Materials . 6
4.1 Concrete . 6
4.1.1 Normal-weight concrete for cast-in situ chimneys . 6
4.1.2 Concrete for prefabricated chimneys . 6
4.2 Mortar for bedding of prefabricated elements . 6
4.3 Reinforcing steel . 6
5 Material properties . 6
6 Structural design . 8
6.1 Actions . 8
6.2 Effect of actions . 8
6.2.1 General. 8
6.2.2 Partial safety factors . 8
6.2.3 Moments of 2nd order . 8
6.2.4 Superposition of effects from thermal and other actions . 10
6.3 Verification . 11
6.3.1 General. 11
6.3.2 Ultimate limit state . 11
6.3.3 Serviceability limit state . 14
7 Detailing provisions . 14
7.1 Cast-in situ chimneys . 14
7.1.1 Minimum vertical reinforcement . 14
7.1.2 Minimum horizontal reinforcement . 14
7.1.3 Minimum reinforcement around openings . 15
7.1.4 Distance between bars . 15
7.1.5 Minimum concrete cover . 15
7.1.6 Minimum wall thickness . 15
7.1.7 Splices . 16
7.2 Prefabricated concrete chimneys . 16
7.2.1 Minimum reinforcement for transportation of prefabricated elements . 16
7.2.2 Minimum horizontal reinforcement . 16
7.2.3 Minimum concrete cover . 16
7.2.4 Minimum wall thickness . 16
7.2.5 Vertical continuous bundles of bars . 16
7.2.6 Openings . 17
8 Workmanship . 18
8.1 General. 18
8.2 Bedding joints . 18
8.3 Reinforcement ducts . 18
9 Quality control . 19
9.1 Cast-in situ chimneys . 19
9.2 Prefabricated chimneys . 19
Annex A (normative) Analysis of stresses due to thermal and other actions . 20
Annex B (normative) Limitations of crack widths . 24
Bibliography . 25
European foreword
This document (prEN 13084-2:2025) has been prepared by Technical Committee CEN/TC 297 “Free-
standing industrial chimneys”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 13084-2:2007.
EN 13084-2:2007:
— the normative cross-references were adapted,
— requirements and areas of application have been revised,
— textual formulations and editorial changes for clarification were made and
— Formula (9) was corrected.
This document is part 2 of a series of standards as listed below:
— EN 13084-1, Free-standing chimneys — Part 1: General requirements
— EN 13084-2, Free-standing chimneys — Part 2: Concrete chimneys
— EN 13084-4, Free-standing chimneys — Part 4: Brick liners — Design and execution
— EN 13084-5, Free-standing chimneys — Part 5: Material for brick liners — Product specifications
— EN 13084-6, Free-standing chimneys — Part 6: Steel liners — Design and execution
— EN 13084-7, Free-standing chimneys — Part 7: Product specifications of cylindrical steel fabrications
for use in single wall steel chimneys and steel liners
— EN 13084-8, Free-standing chimneys — Part 8: Design and execution of mast construction with satellite
components
— EN 13084-9, Free-standing chimneys — Part 9: Monitoring, inspection, maintenance, remedial and
reporting; operations and actions required
Additionally applies:
— EN 1993-3-2, Eurocode 3: Design of steel structures – Part 3-2: Towers, masts and chimneys – Chimneys
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
1 Scope
This document specifies particular requirements and performance criteria for the design and
construction of cast-in situ concrete chimneys as well as prefabricated concrete chimneys. It identifies
requirements to ensure the mechanical resistance and stability of concrete chimneys in accordance with
the general requirements given in EN 13084-1:2025.
As for chimneys attached to buildings the criteria given in Clause 1 of EN 13084-1:2025 apply.
Unless otherwise stated in the following clauses the basic standard for the design of concrete structures,
EN 1992-1-1:2023 applies.
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.
prEN 206-1:2024, Concrete — Specification, performance, production and conformity- Part 1: Performance
requirements factory production control and assessment criteria for individual values
EN 1520:2011, Prefabricated reinforced components of lightweight aggregate concrete with open structure
with structural or non-structural reinforcement
EN 1992-1-1:2023, Eurocode 2: Design of concrete structures — Part 1-1: General rules and rules for
buildings, bridges and civil engineering structures
EN 1992-1-2, Eurocode 2 - Design of concrete structures - Part 1-2: Structural fire design
EN 12446, Chimneys - Components - Concrete outer wall elements
EN 13084-1:2025, Free-standing chimneys - Part 1: General requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 13084-1:2025 and the following
apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1
prefabricated element
precast member of normal-weight or light-weight concrete, reinforced or not, which completely encloses
the flues of chimney stacks
3.2
r
...
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