National foreword

This British Standard is the UK implementation of EN 12845‑3:2024. It supersedes PD CEN/TS 17551:2021, which is withdrawn.

The UK participation in its preparation was entrusted to Technical Committee FSH/18/2, Sprinkler Systems.

A list of organizations represented on this committee can be obtained on request to its committee manager.

Contractual and legal considerations

This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be accepted by BSI in relation to the adequacy, accuracy, completeness or reasonableness of this publication. All and any such responsibility and liability is expressly disclaimed to the full extent permitted by the law.

This publication is provided as is, and is to be used at the recipient’s own risk.

The recipient is advised to consider seeking professional guidance with respect to its use of this publication.

This publication is not intended to constitute a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2024.

This European Standard was approved by CEN on 8 April 2024.

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, Türkiye and United Kingdom.

European foreword

This document (EN 12845‑3:2024) has been prepared by Technical Committee CEN/TC 191 “Fixed firefighting systems”, 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 2024, and conflicting national standards shall be withdrawn at the latest by November 2024.

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 supersedes CEN/TS 17551:2021.

In comparison with the previous edition, CEN/TS 17551:2021, the following technical modifications have been made:

scope of the document has been adjusted;
ambiguities in the body text have been redrafted;
figures have been updated.

This standard is included in a series of European standards:

CEN/TS 14816, Fixed firefighting systems — Water spray systems — Design, installation and maintenance;

EN 671 (all parts), Fixed firefighting systems — Hose systems;

EN 12094 (all parts), Fixed firefighting systems — Components for gas extinguishing systems;

EN 12101 (all parts), Smoke and heat control systems;

EN 12259 (all parts), Fixed firefighting systems — Components for automatic sprinkler and water spray systems;

EN 12416 (all parts), Fixed firefighting systems — Powder systems;

EN 12845‑1, Fixed firefighting systems — Automatic sprinkler systems — Part 1: Design, installation and maintenance;

EN 12845‑2, Fixed firefighting systems — Automatic sprinkler systems — Part 2: Design and installation of ESFR and CMSA sprinkler systems;

EN 13565 (all parts), Fixed firefighting systems — Foam systems;

EN 14972 (all parts), Fixed firefighting systems — Water mist systems;

EN 17451, Fixed firefighting systems — Automatic sprinkler systems — Design, assembly, installation and commissioning of pump sets.

Any feedback and questions on this document should be directed to the users’ national standards body. A complete listing of these bodies can be found on the CEN website.

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, Türkiye and the United Kingdom.

Introduction

This document specifies requirements for earthquake protection of automatic sprinkler systems (see the EN 12845 series of standards) and can be applicable to other water based fixed manual or automatic fire fighting systems, according to local requirements. Requirements made herein are intended to greatly improve the likelihood that the fire protection systems will remain in working condition during and after an earthquake and minimize or prevent any potential water damage from fixed firefighting systems leakage due to an earthquake.

This document does not cover all legislative requirements. In certain countries, specific national regulations apply and take precedence over this document. Users of this document are advised to inform themselves of the applicability or non-applicability for this document by their national responsible authorities.

1 Scope

This document specifies requirements for earthquake protection of automatic sprinkler systems in accordance with EN 12845:2015+A1:2019.

This document applies only to locations in earthquake zones in accordance with EN 1998‑1:2004, 3.2.11 and the Nationally Determined Parameters.

NOTE The requirements in this document are based on the principle that certain peak ground acceleration values are considered as an earthquake which require special means. Attention is drawn to EN 1998‑1:20041, where a peak ground acceleration above 0,08 g (0,78 m/s²) is considered an earthquake risk. Additional characteristics, NDP and/or NCI can exist in some countries as well as national annexes.

The principles defined in this document can be applicable to other water based fixed manual or automatic fire fighting systems, according to local requirements.

2 Normative references

3 Terms and definitions

4 Design principles

5 Sway bracing and sprinkler pipe support

5.1 General

5.2 Sway brace design

6 Flexibility

6.1 General

6.2 Flexible couplings

6.3 Seismic separation assemblies

7 Clearance

7.1 Clearance around piping through walls or floors

7.2 Clearance at sprinklers

8 Other provisions

8.1 Bracing of suspended ceilings

8.2 Water supply

8.3 Storage racks with in-rack sprinklers

Bibliography

BS EN 12845-3:2024

Fixed firefighting systems. Automatic sprinkler systems - Guidance for earthquake bracing

Current

Published:

31 May 2024