ASFP BlueBook European Version

BLUE BOOKEuropean version Fire resisting ductwork: classified according to BS EN 13501 Parts 3 and 4 European version – 1st Edition FIRE AND YOUR LEGAL LIABILITY 2008 produced the highest UK peace time fire losses of all time, rising over the previous year by 16% to a record £1.3bn. That’s why we must all play our part. Why is this of relevance to me! If you are involved in provision of a fire protection package, at any level, then you share liability for its usefulness and its operation when it’s needed in fire, and that liability will still be there in the event of a court case. I place the order; it is not my responsibility to install the works! If it is your responsibility to specify the materials and/or appoint the installation contractor, it is also your responsibility to ensure that they can prove competency for the fire protection materials used, or the works to be carried out. It’s no longer simply a duty of care or voluntary – it’s a legal obligation. If you knowingly ignore advice that leads to a failure in the fire performance of any element of installed fire protection within a building, then you are likely to be found to be just as culpable as the deficient installer. You share liability for the provision of information required under Building Regulation 16B that tells the user of the building about the fire prevention measures provided in the building. Otherwise, the user cannot make an effective risk assessment under the Regulatory Reform (Fire Safety) Order 2005. What is expected of me? In the event of fire, and deaths, a court will want to know how every fire protection system was selected; the basis for selection of the installer, whether adequate time was provided for its installation, and whether there was adequate liaison between the different parties to ensure it was installed correctly. No ifs, no buts – it’s all contained in the Construction, Design and Management Regulations 2007. The CDM 2007 regulations, enforced by Health and Safety Executive concentrate on managing the risk, and the health and safety of all those who build, those that use the building, those who maintain it and those that demolish it – cradle to grave. Be aware – the time to consider the above is before the event, not after it! Association for Specialist Fire Protection / www.asfp.org.uk 2 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 Association for Specialist Fire Protection (ASFP) Kingsley House, Ganders Business Park, Kingsley, Bordon, Hampshire GU35 9LU, United Kingdom Tel: +44 (0)1420 471 612 Fax +44 (0)1420 471 611 www.asfp.org.uk The Association was formed in 1976, and currently represents the majority of UK contractors and manufacturers of specialist fire protection products, with associate members representing regulatory, certification, testing and consulting bodies. ASFP seeks to increase awareness and understanding of the nature of fire and the various forms, functions and benefits provided by passive fire protection. It is willing to make available its specialist knowledge on all aspects of fire protection and can assist designers and main contractors in identifying products suitable for specific requirements, both in the UK and related overseas markets. Heating and Ventilating Contractors’ Association Esca House 34 Palace Court London W2 4JG T: 020 7313 4900 F: 020 7727 9268 www.hvca.org.uk The HVCA represents the interests of firms active in the design, installation, commissioning and maintenance of heating, ventilating, air conditioning and refrigeration products and equipment Acknowledgements This document complements the 2nd Edition Volume 2 of ‘Fire resisting ductwork’ which focuses on BS 476 Part 24 test data. It has been prepared by ASFP Task Group 6A Fire Resisting Ductwork. The contributions are gratefully acknowledged: R H Earle P Hanson M Hart T Hubbard B A James N J Macdonald L Cody W Parlor Exova Warrington Fire, Task Group Chairman Royal Borough of Kensington and Chelsea Knauf Insulation Promat UK Ltd Fire Protection Ltd BRE Global Rockwool Ltd ASFP Technical Officer Thanks also go to Mr T Day previously employed by BRE Global and one-time Convenor of BSI FSH/22/9 and CEN TC127 WG2 for his contributions in the early drafts of this document. Although care has been taken to ensure, to the best of our knowledge, that all data and information contained in this document is accurate to the extent that it relates to either matters of fact or accepted practice or matters of opinion at the time of publication, neither the Association for Specialist Fire Protection Limited nor the co-publishers will be liable for any technical, editorial, typographical or other errors or omissions in or misinterpretations of the data and information provided in this document. Since this document may be subject to change and updating, the data and information which it contains is only correct at the date of this publication. The latest version of this publication is freely downloadable from the ASFP web site at www.asfp.org.uk/publications. The latest date is indicated at the bottom of each page. The ASFP shall not be liable for products delivered to the market, or for any aspect of ‘withdrawn’ products. Compliance with this ASFP document does not of itself infer immunity from legal obligation © Association for Specialist Fire Protection 2009 ISBN: 978-1-870409-36-0 Association for Specialist Fire Protection / www.asfp.org.uk 3 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 Fire resisting ductwork: Classified according to BS EN 13501 Parts 3 and 4 European version – 1st Edition Published by the Association for Specialist Fire Protection in conjunction with Heating and Ventilating Contractors Association FOREWORD I am pleased to introduce this new 1st edition of the European version of the ASFP publication ‘Fire Resisting Ductwork: classified according to BS EN 13501 Parts 3 and 4’ and wholly based on EN fire tests and classifications. It provides complementary information to the UK version entitled ‘Fire resisting ductwork: tested to BS 476 Part 24: 2nd Edition’ which is limited to fire test data from BS 476 Part 24 tests. Both documents provide guidance to best practice for the use of ducts in buildings. The European version will be valid for tests and classifications from EN 13501 Parts 3 and 4 under the European Construction Products Directive [or proposed Regulation] whereas the BS 476-24 test method may remain useful in applications outside the European Community. The prevention of fire spread through buildings via ducted systems is of critical importance, as evidenced by serious fire losses in recent years. This document provides details and new recommendations not previously covered in other standards or codes of practice and should make a significant contribution to improved fire safety. Both the British Standard version and this European version contain sections on the different types of system and their function; information on all the relevant legislation, standards and codes of practice as well as notes on penetration seals and support systems. This Edition will also introduce Data Sheets which provide details of duct systems that have been suitably fire tested and classified to EN 13501-3 and/or EN 13501-4 by a European Notified Body, and where the data is provided by a recognised third party product certification scheme which is accredited or recognised by UKAS. This European Edition provides a lead for fire engineers & engineering services designers by including European rules of application for direct [DIAP] and extended [EXAP] application of test results for fire resisting ductwork systems The ASFP recognises the key importance that fire-rated ductwork for air distribution and smoke extraction applications plays in the safe movement of air and smoke through buildings, and is particularly pleased to see these topics addressed here. We commend the guidance to designers, contractors and insurers. Richard Earle Chairman ASFP Task Group 6 Exova Warringtonfire Association for Specialist Fire Protection / www.asfp.org.uk 4 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 ASFP BLUE BOOK – EUROPEAN VERSION 1st EDITION Amendments DATE SECTION AMENDMENT SUMMARY SOURCE Note 1. Amendments may only be inserted by ASFP Secretariat with approval of the ASFP Technical Officer. Association for Specialist Fire Protection / www.asfp.org.uk 5 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 .....................................................................................................................22  7.......................................................................................................................................................................... support systems & ancillary items ..................................................................................................................1   GENERAL NOTES .9  4.............10  4....11  PRESSURISATION SYSTEMS ...........................31  SMOKE EXTRACTION DUCTS (SINGLE COMPARTMENT) TESTED TO BS EN 1366-9...............................1  4.....41  APPENDIX A5: Explanatory notes for the rules of direct field of application of test data (DIAP) for ducts tested to EN 1366-9.................................. for ducts tested to EN 1366-9........................................3   7................................................47  APPENDIX F: Standard specifications & method of measurement of building works ...........................................................................................................................................................................................................................1  7..........................................uk 6 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 .................................45  APPENDIX E: Bibliography ...................................asfp.....................................................................11  CAR PARK EXTRACT SYSTEMS ..........................................................................................................................................3  4..........................................................10  DUAL VENTILATION /SMOKE EXTRACTION SYSTEMS ................  EN FIRE TESTS & CLASSIFICATIONS FOR FIRE RESISTING DUCTS ................  DEFINITIONS.............................6  5..............................................................................................................................CONTENTS 1...................................................................40  APPENDIX A4: Explanatory notes for the rules of extended field of application of test data (EXAP) according to EN 15882-8.............................4  4.............................. for ducts tested to BS EN 1366-1 .........................................................org.......................................................1   RELATED STANDARDS .... for ducts tested to BS EN 1366-8.........................................10  SMOKE EXTRACTION DUCTS – SINGLE AND MULTIPLE COMPARTMENTS...........................................................................35  APPENDIX A1: Explanatory notes for the rules of direct field of application of test data (DIAP) for ducts tested to EN 1366-1....................  TYPES OF DUCT SYSTEMS & FUNCTIONS.......50  APPENDIX H: Data Sheets ..................38  APPENDIX A2 Explanatory notes for the rules of extended field of application of test data (EXAP) according to BS EN 15882-1.....2  7..............................................................................................21  5....................................................................................................................................................................24  SMOKE EXTRACTION DUCTS (MULTI COMPARTMENTS) TESTED TO BS EN 1366-8..........................7  3................................................12  FIRE RESISTING DUCTS & RELATED STANDARDS.......................................22  6....................  SCOPE...............................41  APPENDIX B: Explanatory guidance for the use of fire stopping as penetration seals.....................................51  Association for Specialist Fire Protection / www...................4   GENERAL INFORMATION ON EN FIRE TESTS ..............49  APPENDIX G: Criteria of acceptability of data sheet entries ..............................................11  KITCHEN EXTRACT SYSTEMS ...........................................41  APPENDIX A6: Explanatory notes for the rules of extended field of application of test data (EXAP) according to EN 15882-8.......................... codes and requirements...7  2............................................   A COMPARISON OF BS 476 PART 24 WITH BS EN 1366-1 FIRE TEST METHODS................................................................24  7................................................................................................  VENTILATION DUCT SYSTEMS ..........................39  APPENDIX A3: Explanatory notes for the rules of direct field of application of test data (DIAP) for ducts tested to BS EN 1366-8..........5  4...........................................................2  4.....7  2  INTRODUCTION.....24  VENTILATION DUCTS ........................................................................................................................44  APPENDIX D: Regulations..........................................................42  APPENDIX C: Limitations of fire resisting ductwork systems ......................................... the fire performance criteria for the penetrated wall or floor are maintained.uk 7 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . and for the business to be back in operation as soon as possible. for fire-fighters to combat a fire in a dependable manner. The guidance given in this publication specifically refers to fire resisting ductwork tested to the relevant part of BS EN 1366 and does not. Not all methods will be suitable for all purposes.org. therefore. or by treatment to satisfactorily constructed and supported steel ductwork with the addition of fire insulating materials. BS EN standards. size. support systems and ancillary items. with a section relating to limitations. for a variety of purposes. and to ensure that minimum performance standards are maintained which will contribute to ensuring that fire compartments are not breached prematurely. Drawings of typical BS EN 1366 fire test constructions are reproduced (by kind permission of the British Standards Institution) and diagrams of types and functions of various fire resisting ductwork systems are included. a fire resisting ductwork system unless the construction and materials of the whole system are proven by fire test and classified according to BS EN 13501 Parts 3 and 4 Appendix E discusses 'Limitations' and will hopefully be of interest to the reader. Care must be taken when choosing a fire resisting ductwork system and checks should be made to ensure that the ductwork fire performance meets with the requirements of the relevant application. The primary intended objective for fire safety in buildings is to limit fire to the compartment of origin. or converted into. and to put it out quickly and affectively. such as the orientation. The fire performance of a duct which penetrates a fire resisting/separating element requires careful consideration by designers and controlling authorities. Formal fire classifications shall be available according to BS EN 13501 Parts 3 and 4. and references the Building Regulations. fixings and mountings of tested configurations. It is a requirement that where these compartment walls/floors are penetrated by ducts or other building services. Many fire tests are required to meet all the expected applications. IMPORTANT All fire resisting ductwork should be tested according to all aspects of the intended application. These are for guidance purposes only. unless suitable fire prevention methods are installed from the outset.1. such that fire in one compartment may not spread to other areas.1 GENERAL NOTES Fire resisting ductwork may need to pass through compartment walls or floors that will have a prescribed fire resistance period in terms of the load-bearing capacity (stability). CAUTIONARY NOTE TO ALL DUCTWORK DESIGNERS. 8 or 9. SCOPE This guidance is intended to assist the reader in understanding many of the essential details which play a significant part in ensuring that fire resisting ductwork (which includes smoke outlet) is correctly designed and installed in accordance with current BS EN standards and UK legislative requirements. The information given in this guidance focuses on the types and functions of fire resisting ductwork. is available in the ASFP ‘sister’ document ‘Fire resisting ductwork: tested to BS 476 Part 24: 2nd Edition Detailed information is provided in this document on European fire tests for ducts. The Association for Specialist Fire Protection / www. Only then can we be sure that opportunity exists for occupants to safely escape from a building. and careful selection is often required Fire resisting ductwork can be provided either by specialist companies producing proprietary systems. together with a summary of the rules for both direct and extended fields of application. Guidance is also given in respect of the fire resisting requirements for duct systems incorporating penetration seals.asfp. In this publication the fire prevention method focuses on the use of fire resisting ductwork. Ducts can provide a primary route for fire spread through buildings. inspection and verification of fire resisting ductwork tested to BS EN 1366 Parts 3. installation. Other guidance and information. 2 INTRODUCTION This publication has been produced to assist those involved in the specification. for durations of 30 to 240 minutes. include advice on conventional non-fire rated ventilation ductwork systems. integrity and insulation criteria. British Standards and Codes of Practice which apply to these specific types of duct. Users should satisfy themselves that the field of application meets the intended use 2. or ducts containing services such as water pipes and cables. MANUFACTURERS AND INSTALLERS General purpose DW/144 ventilation/air conditioning ductwork cannot be utilised as. shape. which is restricted to the use of the BS national test method BS 476 Part 24. controlling authorities may waive the insulation requirement or allow a reduced period of insulation. if a kitchen duct system ƒ Any need for a smooth internal surface. for example. OFFICIAL GUIDANCE The guidance given in Section 10 of the Approved Document B for B1 (Means of Escape) and B3 (Internal Fire Spread Structure) of the Building Regulations 2000 for England and Wales also refers to BS 5588: Part 9 for alternative ways in which the integrity of compartments may be maintained where ductwork penetrates fire separating elements. in some car parks. the regulatory requirements and the guidance of BS 9999 should be followed using either: Method 1 Protection using fire dampers. should in all cases be at least equal to those required for the penetrated element of construction. FACTORS TO CONSIDER It is essential to give due consideration to other factors that may be required when evaluating the suitability of a proposed system of fire resisting ductwork. ƒ The suitability for cleaning. management and use of buildings Similar recommendations are given in the Building Regulations (Northern Ireland) 2000. etc. a fire resisting ductwork system unless the construction / materials of the whole system are classified according to BS EN 13501 Parts 3 and 4 Association for Specialist Fire Protection / www. BS 9999 Code of practice for fire safety in the design. fresh air make up provision.standard periods of integrity and insulation. BS 5588 standards related to ductwork applications have been superseded by a new standard. lift shaft ventilation.) and therefore either Method 2 or Method 3 of BS 9999 should be used. alongside an acceptable Management level as defined by BS 9999. for high pressure ducts.asfp. Most general purpose ventilation ductwork systems offer little or no protection against fire spread. stiffening and supporting of the ductwork. staircase and lobby pressurisation. kitchen extraction. Method 2 Protection using fire resisting enclosures. General purpose DW/144 ventilation/air conditioning ductwork cannot be utilised as. where enforcers consider that there is not a possibility of combustible materials being in close proximity of the ductwork. It is vitally important for life safety that the fire resistance of the element of construction is not reduced when ductwork is routed through it. In certain circumstances. which give a safe period for evacuation of people.g. support system and penetration sealing method ƒ Pressure / air carrying capacity ƒ Materials sensitive to thermal shock ƒ Materials susceptible to physical damage ƒ Acoustic performance requirement of the system ƒ Thermal performance requirement of the system ƒ Resistance to air flow. ALTERNATIVE APPROACHES When ventilation ductwork penetrates building compartments. These may include: ƒ Seismic qualification of ductwork. a safe period for fire fighting and can also provide for property protection. and leakage where required. Method 3 Protection using fire resisting ductwork Good practice dictates that fire dampers should not be installed within certain ductwork systems in buildings (e. HVCA GUIDANCE Steel ductwork systems for air movements around buildings are generally constructed to the HVCA guide DW/144 which is a document covering a wide range of construction standards in the manufacture of sheet metal ductwork for use in low. or converted into. medium or high pressure applications and includes various methods of jointing.org.uk 8 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . and in the Building (Scotland) Regulations: 2004 Statutory regulations and design codes provide the designer with prescribed periods of fire resistance to elements of construction. Integrity and Insulation Both of these failure criteria are defined in EN 1366-1 Section 11.9. and designed to provide a degree of fire resistance when tested to BS EN 1366 -1 Duct/Ductwork .1 of this document Generally. constructed to prevent the spread of fire to or from another part of the same building.org.Self supporting Self supporting fire rated ducts are those that are formed with fire protection boards. related to the internal surface area of the duct inside the furnace Association for Specialist Fire Protection / www. the following performance criteria are applied to fire resisting ductwork. Duct B terminology is associated with ventilation ducts where fire is inside the duct.Fire resisting A duct or ductwork used for the distribution or extraction of air. Duct/ductwork .1. for a stated period of time. Specific conditions are provided in the relevant fire test standards EN 1366 Parts 1.uk 9 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . Duct/Ductwork . Further information is provided in Section 7. spaces or storeys. the ability of a component or construction to satisfy. some or all of the appropriate criteria specified in the relevant part of BS EN 1366. Access doors A closure of an inspection opening within the duct Compensator A device that is used to prevent damage from the forces generated by expansion Duct /Ductwork An enclosed system of any cross sectional shape for the distribution and extraction of air within a building. which also references EN 1363-1 Failure of this criterion shall have occurred if the flow rate in Duct A during the test exceeds 10m3/m2h at normal temperature and pressure. without a steel duct. Duct A. FIRE TESTS A satisfactorily constructed and supported fire resisting duct is classified according to the fire tests as called up in BS EN 13501 Parts 3 or 4. 8 and 9 Fire compartment A building or part of a building.1 and 7. B and C Duct A terminology is associated with ventilation ducts where fire is outside the duct.4. when tested to BS EN 1366 .8. Duct C is the terminology related to smoke extract ducts with fire inside the duct. DEFINITIONS For the purpose of this document the following definitions apply. Duct/ductwork . A roof space above the top storey of a compartment is included in that compartment Fire Resistance For ductwork systems.2. Supplementary insulation may also have to be considered for these systems.SELF SUPPORTING DUCTWORK An alternative to steel ductwork systems is self supporting ductwork such as that constructed from rigid boards. when tested to BS EN 1366 .3. and possibly framework.Fire resisting smoke extraction for single compartments A duct used for the extraction of smoke in case of fire and designed to provide a degree of fire resistance.asfp. 7. comprising one or more rooms. The European fire test documents include rules for the direct field of application of test data. or an adjoining building.Fire resisting smoke extraction for multi-compartments A duct used for the extraction of smoke in case of fire and designed to provide a degree of fire resistance. BS EN 1366 test series includes fire test methods for ventilation ducts and smoke extraction ducts – see Section 5. The rules for extended field of application are provided as BS EN 15882-1 and BS EN 15882-8 respectively 3. which also references EN 1363-1 Smoke leakage for smoke extract ducts See EN 1366-1 Section 11. Smoke extract duct See section 4 Suspension devices The components used for suspending and fixing a duct from a floor. in accordance with the EN 1366 Parts 1. through which the duct passes in the fire test. In situations where smoke clearance by natural ventilation through windows or other openings may be difficult (e. which reduces the fire performance of the fire separating element Penetration sealing system for fire resisting ductwork The system used to maintain the fire resistance of the ductwork system where it passes through a fire separating element. in order to provide the replacement air. 4. in large or deep basements or in high rise buildings without windows that can be opened) ductwork is required to conduct the smoke to a suitable outlet from the building. Pressurisation A method of protecting an escape route against the ingress of smoke by pressurising the air within the escape route at a higher level than the air in the adjacent parts of the building.asfp. it must at least be capable of resisting the anticipated smoke temperatures generated during the development of Association for Specialist Fire Protection / www. or other building services. 8 and 9 fire test methods on the entire ductwork system. often in a basement or on the roof. If appropriate fire precautions are not implemented. Shunt System A duct or ductwork used solely for extraction in flats and maisonettes which may be used to avoid the need to provide fire dampers in extract ductwork from bathrooms and WC’s. If the ductwork incorporated in a smoke extraction system is wholly contained within the fire compartment.g. smoke and toxic gases to spread rapidly through a building. It covers only ductwork that is part of the following systems for handling air.1 VENTILATION DUCT SYSTEMS Mechanical ventilation systems are used to extract vitiated or polluted air from a building and to supply replacement fresh or conditioned air. extend throughout the building. It may also be necessary to install ducted air inlets as part of the smoke extraction scheme. Surrounding construction /supporting construction The wall or partition or floor. air or objects to pass from one compartment to another and which is enclosed with fire-resisting construction. compartment floor. Protected shaft A shaft which enables persons.uk 10 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . cavity barrier and construction enclosing a protected escape route and/or a place of special hazard Kitchen extract duct See section 4 Penetration An aperture through a fire separating element for the passage of a duct or ductwork. The necessary fans and conditioning equipment are generally located in separate plant rooms. Typical examples are illustrated in figures 1-8. which could otherwise reduce visibility and impair human functions.org. This facilitates the escape of the building occupants and assists fire fighters in locating the seat of the fire and extinguishing it. fan assisted systems are used. TYPES OF DUCT SYSTEMS & FUNCTIONS This document does not apply to ducts containing services such as water pipes or electrical cables. seals and supports.Fire Separating Element A compartment wall. fumes or products of combustion. or supporting and fixing a duct from a wall. The distribution of the air involves ductwork which may be very large. where the duct or ductwork passes through the element of construction. In European standard documents this is defined as the ‘supporting construction’ 4. penetrate compartment walls and/or floors and have openings in every space through which it passes.2 SMOKE EXTRACTION DUCTS – SINGLE AND MULTIPLE COMPARTMENTS Smoke extraction is the evacuation from a building of products of combustion. pipework. In cases where the natural buoyancy of the combustion products is not adequate to ensure the required smoke extraction rate through the ductwork. such as smoke and toxic gases. ventilation ductwork may provide a route for fire. 4. if the ductwork penetrates a fire resisting barrier. by maintaining the air within the critical areas at pressures higher than those in adjacent areas. In most cases. (We suggest that paragraph 2. in that combustible deposits such as grease are likely to accumulate on its internal surfaces. 4. because of the polluted nature of the extracted air. However. but are converted to a smoke extraction system in the event of fire. e) Guidance for Hospitals is given in HTM 05-02. where applicable.10 Fire dampers should not be installed in extraction ductwork serving kitchens due to the build up of grease. as smoke within these areas would inhibit escape. as the air supply creating the pressurisation must be maintained for the duration of a fire. Guidance for the installations for kitchen extract ducts is provided in various documents. These will generally be lower than the temperatures specified in EN 1366. unless the duct also penetrates a compartment separation wall/floor where the fire resistance period and criteria should meet any higher requirement of the compartment wall/floor.22 that supplementary guidance is given in British standards. and other documents. kitchens are required to be enclosed with fire resisting construction. Any duct or ductwork penetrating fire resisting barriers must be fire resisting.5. 4. b) Approved Document B 2006.4 PRESSURISATION SYSTEMS Pressurisation is a method of restricting the penetration of smoke into certain critical areas of a building. thus providing an economical dual system. The extracted air should not be re-circulated. It applies particularly to protected stairways.1 Means of Escape (Approved Document B: B1) a) Approved Document B: 2006.asfp.3 DUAL VENTILATION /SMOKE EXTRACTION SYSTEMS These systems serve as a conventional ventilation system under normal conditions. d) British Standards Although Approved Document B 2006 does not provide guidance on kitchens other than in small premises and residential care homes. which are intended to represent a fully developed fire. because of the difficulties in clearing smoke from basements. Whilst paragraphs (a) to (g) may not be exhaustive. unless a suitable automatic extinguishing arrangement is provided. and may spread fire if ignited.53 references BS 5720. 4.5.3 applies) BS 5720 paragraph 2. A fire in a kitchen may spread to other areas of the building by way of the kitchen extract ductwork and may also prejudice escape routes. fire dampers cannot be used within the ductwork to prevent the spread of fire. Consequently the extract ductwork also needs Association for Specialist Fire Protection / www. it must also be capable of providing the relevant fire resistance in a test to the relevant part of EN 1366.org.5 KITCHEN EXTRACT SYSTEMS Kitchen extraction ductwork presents a particular hazard. Paragraph 5.7 Table 31 requires a kitchen to be enclosed with fire resisting construction. lobbies and corridors. ducting and lagging forming the kitchen extract duct should made from non-combustible material BS 9999 Paragraph 32.2.uk 11 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . However. The fire resistance requirement is normally 30 minutes. and also to fire fighting shafts serving deep basements.2.3 States that kitchen extract ductwork should be enclosed with fire resisting construction where passing through other floors between the kitchen and the external weathering cowl. the AD-B states in paragraph 0.5. they attempt to list the common requirements with references the regulatory guidance in Approved Document B 2006. c) Any kitchen extract duct or ductwork penetrating fire resisting barriers must be fire resisting between the kitchen and the external weathering cowl.5. The canopy. 4. A pressurisation system is a special form of mechanical ventilation system. Paragraph 10. and AD-B paragraph 5.a fire. Further clarification of the fire testing requirements for these two different situations is provided in Section ‘5’ of this document ‘Standard Fire Tests’.50 Non-domestic kitchens are required to have separate and independent extraction systems. Specific regulatory information is available in Approved Document B as guidance to building regulations. NOTE: Regardless of the publication of BS ISO 6944-2 the UK regulators may choose not to adopt all published standards in regulatory documents. because of the polluted nature of the extracted air. to prevent a fire from inside the duct breaking out and spreading to other areas in the building. Any duct or ductwork penetrating fire resisting barriers must be fire resisting.6 CAR PARK EXTRACT SYSTEMS Car parks are required to have separate and independent extraction systems. Paragraph 10. the specifier may select a system which has been tested to BS ISO 6944-2: 2008 which has been developed specifically for this application. b) BS ISO 6944-2: 2008 Although BS EN 1366 Parts 1.uk 12 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . Therefore a fire resisting enclosure (known as method 2) or fire resisting duct (known as Method 3) is recommended.asfp. The required fire resistance is to be achieved from inside the duct.to be enclosed with fire resisting construction where passing outside the kitchen enclosure up to its discharge to external air.org.5. 4. 4. NOTE: ASFP emphasises that regular internal cleaning of kitchen extract ducts is an essential part of all fire risk assessments and planned maintenance programmes in accordance with HVCA publication DW/172. 8 and 9 do not have specific fire performance requirements for kitchen extract systems. which can adversely affect the effectiveness of any dampers. Fire dampers (known as Method 1) are not suitable for extract ductwork serving kitchens. Association for Specialist Fire Protection / www.2 Compartmentation (Approved Document B: B3) a) Approved Document B 2006. It is recommended that fire dampers should not be installed in extraction ductwork serving car parks.10 Where a kitchen extract duct (an air handling duct) passes through fire separating elements the integrity of those elements should be maintained.9 and 10. This is due to the likely build up of grease within the duct. uk 13 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 .Association for Specialist Fire Protection / www.org.asfp. org.Association for Specialist Fire Protection / www.asfp.uk 14 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . Association for Specialist Fire Protection / www.org.uk 15 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 .asfp. uk 16 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 .asfp.org.Association for Specialist Fire Protection / www. Association for Specialist Fire Protection / www.asfp.org.uk 17 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . Association for Specialist Fire Protection / www.org.uk 18 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 .asfp. asfp.uk 19 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 .Association for Specialist Fire Protection / www.org. Association for Specialist Fire Protection / www.org.asfp.uk 20 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . asfp. FIRE RESISTING DUCTS & RELATED STANDARDS Fire resisting ducts Smoke control ducts Product standard Product standard EN 15871 EN12101-7 Fire resisting ducts Smoke and heat control duct systems Classification standard Classification standard EN 13501-3 EN 13501-4 Fire classification of construction products and building elements .5.part 3: classification using data from fire resistance tests on components of normal building service installations Fire classification of construction products and building elements .uk 21 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 .part 4: classification using data from fire resistance tests on components of smoke control systems Test standard Test standard EN 1366-1 EN 1366-8 Fire resistance tests for service installations: Ducts Fire resistance tests for service installations: Smoke extraction ducts (multi compartment) Test standard EN 1366-9 Fire resistance tests for service installations: Single compartment smoke extraction ducts Extended field of application standard Extended field of application standard EN 15882 -1 EN 15882 -8 Extended applications of test results for fire resistance tests for service installations: Ducts Extended applications of test results for Smoke extraction ducts Association for Specialist Fire Protection / www.org. asfp. (by-pass valve and damper) (Duct B). Extract fan with capacity to produce gas velocity at 3m/sec at ambient at start of test. Volume flow measuring station Condensing unit Velocity measuring station (Duct B) Fire exposure ISO 834 time temperature curve EN 1363-1 Measurement of temperature of flue gases in duct At centre of cross-section.3] ITEM BS 476 Part 24 / ISO 6944 (1985) BS EN 1366-1 / ISO 6944-1 (2008) Apparatus Furnace controlled to ISO 834 Furnace controlled to EN 1363-1 Thermal movement measuring device (Duct A) Force measuring device (Duct B) Device for measuring restraint forces Thermocouples for measuring internal temperature of furnace and internal and external temperature of test specimen(s) Equipment for measuring gas pressures in furnace and in duct Equipment for measuring gas pressures in furnace and in Duct A Extract fan required for Duct A to produce and maintain an underpressure of 300Pa. No subsequent adjustment of fan required for duct A -300 Pa at start of test and maintained at this value though out test Association for Specialist Fire Protection / www. Extract fan required for duct A to produce and maintain an underpressure of 300Pa connected to measuring station between duct and fan. The following table illustrates the differences. Allows use of flow rate controller to achieve this.1 RELATED STANDARDS CLEANLINESS EN 15780 Cleanliness of ducts FIRE AND DISTRIBUTION SYSTEMS BS EN 15423 ‘Fire precautions for air distribution systems in buildings’ 6.uk 22 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . Allows use of flow rate controller to achieve this. The harmonised EN test methods are acceptable for use across Europe and mitigate the costs of testing for manufacturers.org.2] and BS EN 1366-9 for single compartment smoke extraction ducts [see 8.e.1] Note that there are additional fire tests for smoke extraction ducts: i. BS EN 1366-8 for multi-compartment smoke extraction ducts [see 8.5. at penetration point and 2m from this outside furnace No specific requirement to measure Pressure condition in duct A Neutral pressure below horizontal duct and set to –300 ± 10Pa at start of test relative to ambient conditions. A COMPARISON OF BS 476 PART 24 WITH BS EN 1366-1 FIRE TEST METHODS The test data arising from the previous BS 476 Part 24 tests and harmonised BS EN tests are not directly comparable or interchangeable. for simple ventilation ducts [see 8. (Duct B). Extract fan with capacity to produce gas velocity at 3m/sec at ambient at start of test. ITEM BS 476 Part 24 / ISO 6944 (1985) BS EN 1366-1 / ISO 6944-1 (2008) Velocity in duct B Set to 3m/sec measured at ambient at start of test but no further adjustments made.5 m length horizontal duct 2. Minimum dimension of ducts Cross section of ducts In furnace In furnace 3m length horizontal duct 4m length horizontal duct 2m length vertical ducts 2m length vertical ducts Outside furnace Outside furnace 2. Both ducts abut to furnace wall with end sealed where it abuts. flaming) Integrity (volume flow rate-15m³/m² h).asfp. cotton pad. End of elbow sealed Cross section of 250 mm by 250 mm Duct restraint Both ducts abut to furnace wall with end sealed where it abuts. 3m/sec at start of test and maintained at this during test except when fan shut off to make integrity measurements Fan shut off prior to integrity evaluations then switched back on after.uk 23 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . gaps. Full restraint provided 2000 mm ± 50 outside furnace from penetration point Full restraint provided 2000 mm ± 50 outside furnace from penetration point (duct B only) Joint arrangement in duct protection At least two joints inside furnace and one outside (vertical ducts one joint inside furnace and one outside) one joint inside furnace and one outside [no greater than 700 mm from penetration point] (vertical ducts one joint inside furnace and one outside) Openings in duct B At least half the cross-section of the duct cross section At least half the cross-section of the duct cross section but clear this is the total and each opening is half of that Supporting construction Not specifically specified Various supporting constructions specified in some detail Assessment of fire resistance Stability Stability no requirement other than observing general behaviour in furnace Integrity (cotton pad. flaming) Insulation Insulation: additional requirements for ducts with combustible linings Smoke leakage (10m³/m² h) Association for Specialist Fire Protection / www. gaps.org.5m length horizontal duct 2 m length vertical ducts 2m length vertical ducts Duct A & Duct B: Duct A: 1000 mm ± 10 wide 500 mm ± 10 high 800mm ± 10 diameter 1000mm by 250 mm NOTE: No provision in Part 24 to cover circular ducts specifically Duct B: 1000 mm ± 10 wide 250 mm ± 10 high 630 mm ± 10 diameter Minimum separation At least 500 mm 500 mm ± 50 Elbow – duct A Same-cross section area as duct. Integrity determined. but it contains limited guidance for the use of ducting in extended fields of application. ASFP has not reproduced the DIAP rules in this document since they are subject to change and improvement by CEN.2. The field of application from tests to BS EN 1366 may be split into two distinct categories viz. Association for Specialist Fire Protection / www. 7. It has also been applied to smoke outlet ducts and to kitchen extract ducts . The principle differences between the BS 476 Part 24 test method [derived from ISO 6944] and the European tests are outlined in Section 6 of this document.where fire insulation is required to be demonstrated. the BS EN 1366 test series includes separate fire test methods for ventilation ducts.which is synonymous with the UK fire resistance test method BS 476: Part 24 method of test.3 and 7. 8 and 9 are used for any reference purposes. as BS EN 1366-8 for multi-compartment use and as BS EN 1366-9 for single compartment use. 8 or 9. It is important to differentiate between single and multi-compartment smoke extract systems. and BS EN 13501-4 applies to smoke control ducts. direct and extended fields of application. EN FIRE TESTS & CLASSIFICATIONS FOR FIRE RESISTING DUCTS 7. providing the design remains substantially as tested – See Section 11.1 GENERAL INFORMATION ON EN FIRE TESTS The European fire resistance tests and classification system for ducting have their foundations in the ISO 6944 method .2 General information on the field of application of test data for classification Classification standards BS EN 13501 parts 3 and 4 inform readers which tests must be undertaken to obtain suitable classification for fire performance.2 VENTILATION DUCTS 7.7.4 . an increase in duct size which necessitates the inclusion of a joint in the duct walls. See Appendices A and B for discussion and further details Direct field of application (DIAP) Rules for direct field of application are included in the fire test standards BS EN 1366-1. ASFP has provided ‘an overview’ of the likely rules in Appendix A of this document which we hope will aid the understanding of the readers of this document Extended application (EXAP) The rules for extended field of application of test data are formulated from experience of accumulative test data for various ductwork installations. a reduction in duct size) without recourse to expert advice. We recommend that the latest copy of EN 1366 Parts 1.org. The European fire test documents include rules for the direct field of application of test data. and for smoke control ducts. 7.1. For example. The International Standard has been used to specify a method of test and criteria for the determination of vertical and horizontal ventilation with the general purpose to measure the ability of a representative duct or duct assembly to resist the spread of fire from one compartment to another. BS EN 13501-3 applies to fire resisting ducts.uk 24 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . The test results achieved by a particular design may be directly applied to a limited number of variations (e. The rules are derived from information obtained from tests carried out in accordance with BS EN 1366 at UKAS accredited or recognised laboratories.2.asfp. as BS EN 1366-1. The assessment considers changes in the tested design beyond the scope of direct application and may also consider variations to the tested design. BS EN 1366-8 and BS EN 1366-9 according to the application concerned. based on test data from BS EN 1366 Parts 1.g. We recommend that the latest copy of EN 15882 Parts 1 and 8 are used for any reference purposes. which may be supplemented by appropriate and relevant historical test evidence generated from other sources. ASFP has not reproduced the EXAP rules in this document since they are subject to change and improvement by CEN. The EXAP rules are contained in stand alone documents BS EN 15882-1 in the case of tests made to BS EN 1366-1 and in BS EN 15882-8 for smoke control ducts tested to BS EN 1366 Parts 8 and 9. and a separate series of documents (pr EN 15882-x) is in preparation to prescribe methods for agreed rules for extended fields of application of test data from the fire tests. ASFP has provided ‘an overview’ of the likely rules in Appendix A of this document which we hope will aid the understanding of the readers of this document.1 BS EN 1366-1 Fire resistance tests for service installations: ducts This EN test for ventilation ducts is also used as a precursor to the ‘Smoke Extract’ ducts – see sections 7. In contrast. together with the leakage rate of the duct can be judged.org. by setting criteria by which the resistance to fire containment (integrity). It is applicable to vertical and horizontal ducts. The standard temperature/time fire exposure specified in BS EN 1363-1 is representative of one possible fire exposure condition at the fully developed fire stage.The test is conducted without the involvement of fire dampers. taking into account joints. One.uk 25 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . The specimen that is subject to the fire test must be designed and constructed to be representative of how it would be constructed on site. and one where the fire is inside (Duct B). one where the fire is outside (Duct A). Association for Specialist Fire Protection / www. air supply and exhaust openings. The method of test does not quantify the behaviour of a duct for a precise period of time in a real fire situation. Both ducts may be tested in either a horizontal or vertical orientation (General views are provided in Figures 10 to 13). Note: Where steel ducts are used. It is applicable only to four sided and circular ducts. as well as suspension devices and penetration seals. The performance of the duct assembly is measured in terms of its ability to withstand exposure to high temperatures. and enables comparisons to be made between constructions. the thermal transmittance (insulation) functions. but can be classified for direct field of application to show compliance with fire resistance requirements in regulations or other safety specifications. these shall have class A leakage in accordance with prEN 1507.asfp. two and three sided ducts are not covered. Two ducts are tested. Figure 10 General arrangement for vertical ducts as tested to BS EN 1366-1 Association for Specialist Fire Protection / www.org.asfp.uk 26 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . The horizontal Duct A is fitted with a branch duct within the furnace.0m inside the furnace and 2.uk 27 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 .asfp.Figure 11 General arrangement for horizontal ducts as tested to BS EN 1366-1 The minimum length of the specimen duct required by the test standard is 4. The cross section of Duct A for test is 1000mm x 500mm internally with the branch section of 250mm x 250mm.0m inside the furnace and 2.0m outside the furnace for vertical ducts. (The condenser traps and removes water from any leakage gases.org.5m outside the furnace for horizontal ducts. the duct the diameter is 800mm with the branch of 250mm diameter). to a fan that maintains an under-pressure of -300 ± 15Pa inside the duct. (For circular ducts. and 2. by reducing the temperature of any gas flow to below 40 deg C so eliminating erroneous leakage measurements due to moisture). Association for Specialist Fire Protection / www. A connection from the end of the Duct A outside the furnace is taken via a condensing unit and leakage measurement equipment. the duct diameter is 630mm).asfp. the partial collapse or loss of cross section in this test may have implications for the expected behaviour for any subsequent Duct C smoke duct test. or gap openings. inside the furnace. in order to gain additional data on the fire performance. Ducts with combustible linings shall also be subject to the insulation failure criteria in EN1363-1 on thermocouples placed inside the duct.) The tested duct assembly is judged against three performance criteria. and will be tested to EN 1366-8. to the supporting structure and penetration seal outside the furnace. However. outside of the furnace are used to determine the average temperature rise (140°C) of test specimen. Smoke Leakage A failure of the smoke leakage criteria. (For circular ducts. The furnace pressure is controlled to 15±3Pa at the mid height on horizontal ducts. this method is not primarily intended for evaluation of a duct system intended as a kitchen extract duct. (Although this is similar to the Annex in BS476: Part 24. as required by the standard. drawn through openings in the sidewall of the duct within the furnace. Additional thermocouples may be included within the duct where a duct has a combustible lining.uk 28 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . The test specimen is subjected to fire on all four sides. Thermocouples are applied to the non-fire face of the duct.org. or to 20±3Pa 100mm below the ceiling for vertical ducts. Stability Note: The loss of stability or the partial collapse of Duct B inside of the furnace is not a failure criterion in this test. appears on the unexposed face of the test specimen outside the furnace). or when sustained flaming. b) When the volume flow rate measured in Duct A exceeds 15m3/m2/hr at NTP (20°C and 1013mbar) relative to the internal surface of the duct. Association for Specialist Fire Protection / www. (When a cotton pad is ignited. A fan is also connected to the end Duct B outside the furnace that induces a furnace gas velocity of 3m/s within the duct. Only thermocouples placed a distance 325mm from the duct penetration detail. the Duct A will require to be tested at the higher under-pressure of -500 Pa) The cross section of Duct B for test is 1000mm x 250mm. compared to that of the laboratory. inside the furnace. The velocity is maintained at 3m/s during the ‘fan on’ periods during the test. These are: Insulation Insulation failure shall be as defined in EN1363-1. shall be deemed to have occurred if the flow rate in Duct A during the test exceeds 10m3/m2/hr at NTP (20°C and 1013mbar) relative to the internal surface of the duct.(Note: for ducts that are intended for use as smoke extract ducts. of duration at least 10s. Integrity Integrity failure shall also be deemed to have occurred if any of the following are observed. All fixed thermocouples and the roving thermocouple may be used to determine the maximum temperature (180°C) rise. inside the furnace. Loss of stability or partial collapse in Duct A will be reflected in the flow rate leakage criteria above. Every 30 minutes of the test the fans are switched off for five minutes to evaluate the integrity of the duct in the ‘fan off’ situation. (Duct A). a) Integrity failure as defined in EN 1363-1. The standard time/temperature exposure is followed. asfp.Figure 12 General arrangement for location of thermocouples on vertical ducts.org. as tested to BS EN 1366-1 Association for Specialist Fire Protection / www. inside the test furnace.uk 29 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . org.3 EXAP rules for the extended field of application of test data for ventilation ducts tested to BS EN 1366-1 See BS EN 15882-1 An overview is provided in Appendix A2 Association for Specialist Fire Protection / www.asfp.uk 30 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 .2 DIAP rules for the direct field of application of test data for fire resisting ventilation ducts tested to BS EN 1366-1 See BS EN 1366 Part 1 An overview is provided in Appendix A1 7.1. as tested to BS EN 1366-1 7. inside the test furnace.Figure 13 General arrangement for location of thermocouples on horizontal ducts.1. Failure of the suspension devices does not constitute failure of the test specimen unless it leads to failure of either E or EI. .3. etc. The system can be briefly summarised as follows:The product standard will state which European classification system applies to the product being considered. This shall be based on a pass/fail test for the leakage. 7.org. and whether it applies to vertical or horizontal orientations or both. “o → i“ or “i ↔ o” shall be used respectively together with “ve” and/or “ho” to indicate orientation (vertical and horizontal).7.1 BS EN 1366-8: 2004: Fire resistance tests for service installations: smoke extraction ducts (multi compartment) This test method is applicable to fire resisting ducts that have already passed the appropriate period to BS EN 1366-1 (Ducts A and B). beyond the limits of the test data obtained For fire resisting ducts. a classification EI30 (ve ho I ↔ o) indicates a ventilation duct capable of satisfying 30 min integrity and insulation.uk 31 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . (A greater under pressure than the standard pressure indicated in BS EN 1366-1). The specimen that is subject to the fire test must be designed and constructed to be representative of how it would be constructed on site. the following classes are defined: EI 15 E 20 30 30 45 60 90 120 180 240 60 The classification shall indicate if the performance criteria are satisfied by fire from inside or fire from outside or both. Smoke extraction ductwork shall be made of non-combustible materials (Euro class A1 or A2). For example. a classification EI30 (ve ho i ↔ o) S indicates a duct with the same performance as above but additionally satisfying the leakage criterion (10 m³/(m²·h).3 SMOKE EXTRACTION DUCTS (MULTI COMPARTMENTS) TESTED TO BS EN 1366-8 7.asfp. The Classification system BS EN 13501-3 will tell readers which fire tests have to be undertaken to allow a classification for fire performance to be made The fire test standard will normally include the direct rules for the field of application of the test data obtained. For example. Association for Specialist Fire Protection / www. A separate document will provide the rules for extended field of application. based on satisfaction of the ambient smoke leakage criterion.4 Classification of fire resisting ventilation ducts BS EN 13501 Part 3 Some readers may not be familiar with the CEN European system of tests and classification. from inside to outside and vice-versa in both vertical and horizontal applications.where the Duct A has been tested a differential pressure 500Pa. The additions “i → o”.1. The classification S shall be included. uk 32 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . as tested to BS EN 1366-8 for multi-compartment use Association for Specialist Fire Protection / www.asfp.org.Figure 14 General arrangement for horizontal smoke extract ducts. (that is. as tested to BS EN 1366-8.provided that it is tested in a horizontal orientation to this method.Figure 15 General arrangement for vertical smoke extract ducts. a vertical duct need not be evaluated to this method .org. One. the horizontal orientated ducts were not tested in BS EN 1366-1). The duct is tested with fire on the inside of the duct (Duct C) See Figure 15. Association for Specialist Fire Protection / www. for multi-compartment use.uk 33 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 .asfp. provided both horizontal and vertical tests have been carried out to BS EN 1366-1 on the specific system. Whilst the test method has been designed to cover both vertical and horizontal smoke extraction ducts. If however. two and three sided ducts are not covered. the system in practice is only to be used for vertical applications in smoke extraction. It is applicable only to four sided and circular ducts. then it will need to be tested in the vertical orientation to the test method here. Smoke Leakage A failure of the smoke leakage criteria. and 2.2m outside the furnace for horizontal ducts.uk 34 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . A perforated plate. Integrity Integrity failure shall also be deemed to have occurred if any of the following are observed as defined in BS EN 1363-1. although these are not required to demonstrate insulation performance and are for information only. (For circular ducts. These are: Insulation Test results from the BS EN 1366-1 test are deemed to demonstrate the insulation performance of the duct. ‘500’. the duct diameter is 560mm). (Note: it is the differential duct pressure that is controlled during the test. of duration at least 10s.3. or to 20±3Pa 100mm below the ceiling for vertical ducts. and to the supporting structure and penetration seal outside the furnace. ‘1000’ or ‘1500’ indicates that when tested at these negative pressures the duct is suitable for use over the range from the tested negative pressure up to a positive pressure of 500 Pa. “S” indicates a leakage rate of less than 5m³/(h. The heating conditions conform to those specified in EN 1363-1 (standard heating curve) and the selected differential pressure maintained to ±3%. an observation window is be located at the end the duct. -300Pa or –500Pa is incorporated within the duct.4 EI Classifications for Multi-compartment smoke control system ducts BS EN 13501-4 30 60 90 120 The classification is completed by the suffix “multi” to indicate suitability for multi-compartment use.m²). or diameter for a circular duct) shall not decrease by more than 10% during the test.3. the symbols “ve” and/or “ho” indicate the suitability for vertical and/or horizontal use. 250mm outside the furnace. To facilitate observations of reduction of cross-section.3 EXAP RULES for extended field of application for smoke extraction ducts (multiple compartments ) tested according to BS EN 1366-8 See BS EN 15882-x An overview is provided in Appendix A4 7. The test specimen is subjected to fire on all four sides. When the cotton pad is ignited or when sustained flaming. The furnace pressure is controlled to 15±3Pa at the mid height on horizontal ducts.0m inside the furnace and 4. appropriate to one of three prescribed differential pressures of –150Pa. 7.org.asfp. 7.3. A fan is connected to the end of the duct outside the furnace that induces a furnace gas velocity of 2m/s ±15% within the duct. shall be deemed to have occurred if the leakage flow rate through the duct section outside of the furnace. Association for Specialist Fire Protection / www. not the air velocity. drawn through openings in the sidewall of the duct within the furnace. The cross section of Duct C for test is 1000mm x 250mm. In addition. as determined by the Oxygen sensor method exceeds 10m3/m2/hr at NTP (20°C and 1013mbar) relative to the internal surface of the complete duct (inside and outside of the furnace) Reduction in Cross-section The internal dimensions (width and height for a rectangular duct.0m inside the furnace and 4.25m outside the furnace for vertical ducts.The minimum length of the specimen duct required by the test standard is 3.2 DIAP rules for the direct field of application of test data for smoke extraction duct test data when tested to BS EN 1366-8 See BS EN 1366 Part 8 . so that is can be judged as not being able to maintain its smoke extraction or fire resistance function. Mechanical Stability The duct inside the furnace collapses.) Thermocouples are applied to the non-fire face of the duct. (Insulation performance is taken from the EN 1366-1 test data). compared to that of the laboratory. as required by the standard.An overview is provided in Appendix A3 The DIAP rules are normally part of the EN test standard The tested duct assembly is judged against three performance criteria. appears on the unexposed face of the test specimen outside the furnace. it is not recommended that multiple assemblies are tested together. two and three sided ducts are not covered. See Figures 16 Association for Specialist Fire Protection / www.uk 35 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . For smoke extraction ducts that pass through into other compartments.7. it is not a prerequisite that the duct is tested to BS EN 1366-1. the smoke extraction system is only intended to function up to flashover (typically 600 °C but other temperatures may be used). The specimen that is subject to the fire test must be designed and constructed to be representative of how it would be constructed on site.asfp.4. This method of test is only suitable for ducts constructed from non-combustible materials (Euro class A1 and A2-s1. It is applicable only to four sided and circular ducts. Whilst it is permitted.1 Fire resistance tests for service installations: single compartment smoke extraction ducts tested according to BS EN 1366-9 This part of EN 1366 specifies a test method for determining the fire resistance of horizontal smoke extraction ducts that are used for single compartment applications only. the method of test described in BS EN 1366-8 should be used.4 SMOKE EXTRACTION DUCTS (SINGLE COMPARTMENT) TESTED TO BS EN 1366-9 7. The method described in this test standard is complex and requires sophisticated instrumentation. A single duct is tested. d0).org. In such applications. Note: unlike the test in BS EN 1366-8. One. with fire on the inside of the horizontal duct. It is applicable to smoke extraction ducts that do not pass through into other fire compartments. org. (For circular ducts. -0 °C for the rest of the test. The cross section of duct for test is 1000mm x 250mm.0m inside the furnace and 4. Association for Specialist Fire Protection / www. the duct diameter is 560mm). The test specimen is subjected to fire on all four sides. if applicable. A fan is connected to the end of the duct outside the furnace that induces a furnace gas velocity of 2m/s ±15% within the duct. The heating conditions and the furnace atmosphere conform to those specified in EN 1363-1 (or. -300Pa or –500Pa is incorporated within the duct. The minimum length of the specimen duct required by the test standard is 3. The furnace pressure shall be controlled to (15 ± 3) Pa throughout the test at the mid-height position of the ducts in the furnace. A perforated plate appropriate to one of three prescribed differential pressures of –150Pa.Figure 16 General arrangement for horizontal smoke extract ducts.2m outside the furnace. 250mm outside the furnace. After 10 minutes this temperature shall be maintained between +70.asfp. drawn through openings in the sidewall of the duct within the furnace.uk 36 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . EN 1363-2) until 600 °C is reached. as tested to BS EN 1366-9 for single compartment use. The mean temperature of the 6 furnace thermocouples shall be reached between 5 to 10 minutes from igniting the first furnace burner. so that is can be judged as not being able to maintain its smoke extraction or fire resistance function. Thermocouples to measure insulation are not required to the duct.m²). for use in combination with smoke exhaust fans and which is intended to extract smoke from the compartment to outside. ‘1000’ or ‘1500’ indicates that when tested at these negative pressures the duct is suitable for use over the range from the tested negative pressure up to a positive pressure of 500 Pa. These are: Smoke Leakage A failure of the smoke leakage criteria.4.To facilitate observations of reduction of cross-section.org. In addition. the symbols. Smoke extraction ductwork. Mechanical Stability The duct inside the furnace collapses.4 Classification for single compartment smoke control ducts according to BS EN 13501-4 E300 30 60 90 120 E600 30 60 90 120 The classification is completed by the suffix “single” to indicate suitability for single compartment use only. The tested duct assembly is judged against three performance criteria.2 Direct field of application for single compartment smoke extract ducts tested to BS EN 1366-9 The DIAP rules are normally part of the BS EN test standard An overview is provided in Appendix A5 7. nor to the supporting structure or penetration seal outside the furnace. ‘500’. “S” indicates a leakage rate of less than 5m³/(h. as determined by the Oxygen sensor method exceeds 10m3/m2/hr at NTP (20°C and 1013mbar) relative to the internal surface of the complete duct (inside and outside of the furnace) Reduction in Cross-section The internal dimensions (width and height for rectangular duct or diameter for circular duct) of the smoke extract duct shall not decrease by more than 10% during the test inside and outside of the furnace.uk 37 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . shall be deemed to have occurred if the leakage flow rate through the duct section outside of the furnace.3 Extended field of application for single compartment smoke extract ducts fire tested to BS EN 15882-Y See BS EN 15882-Y An overview is provided in Appendix A6 7. Association for Specialist Fire Protection / www. an observation window is be located at the end the duct or other suitable place.asfp. “ve” and/or “ho” indicate the suitability for vertical and/or horizontal use.4.4. without passing through other fire compartments. (Fire insulation and fire integrity are not required) 7. through which the fire resisting duct passes. DIAP The following text provides a brief description of the principles behind the rules for the direct field of application of test results. Vertical and horizontal ducts Test results are not interchangeable between vertical and horizontal ducts. as detailed within the test standard. compared to that utilised in the fire test. and without the need to seek further expert/specialist fire safety advice. a limited extrapolation is permitted for larger sizes of duct. The bending stress in the horizontal load bearing member of the suspension device shall not exceed that tested. • Self load bearing ducts If additional loads are applied to the tested duct then the overall height between supports may relate to the load applied in the test. Ducts smaller than those tested are also covered.1. Lower values of under and overpressures are also allowed.1 INTRODUCTION The formal DIAP rules are part of the European test standard EN 1366-1 which is published as BS EN 1366-1 in the United Kingdom. The latter is to avoid buckling of the ducts.2 Overview of the critical parameters for direct rules of application.org. Supporting construction Guidance is given with regard to alternative fire resistant supporting constructions. Steel ducts Guidance is given with regard to the leakage values of steel ducts and stiffeners fitted to a steel duct. Section A.uk 38 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . For full details refer to BS EN 1366-1.asfp. Shape of ducts The field of direct application only covers circular and rectangular ducts with 4 sides. If higher values are possible then additional testing may be needed.APPENDICES A1 to A6 APPENDIX A1: Explanatory notes for the rules of direct field of application of test data (DIAP) for ducts tested to EN 1366-1 A. Section 13.to prevent damage to the duct assembly due to buckling of the vertical duct. Height of vertical ducts • Ducts supported at each storey Limits are given for the distance between supporting constructions and for the size of the ducts compared to the distance between supporting constructions. Guidance is also given with regard to the length and positioning of the suspension devices.1.1.2 provides an overview of the formal rules for direct field of application of data obtained from fire tests to BS EN 1366-1 A. Pressure difference The maximum tested under-pressure in duct A is applicable to the same maximum over-pressure provided that the integrity criteria were satisfied for duct B. Suspension devices for horizontal ducts Maximum values are given for tensile stress and shear stress within the steel suspension devices. Sizes of ducts Provided that the standard sizes of duct are tested. The formal rules allow certain variations in ductwork systems without declassification of the data from the tested ductwork configuration. Association for Specialist Fire Protection / www. Guidance is given on the ratio between the size of the duct and the distance between supporting constructions . the maximum sizes may be extended up to 2500mm wide x 1250mm high for rectangular ducts and up to 1250mm diameter for circular ducts. e. Guidance is also given with regard to the fixing and positioning of the suspension devices. whichever is the greater. Sizes of ducts For rectangular ducts with a cross section larger than 1250mm wide x 1000mm high and for circular ducts with a cross section larger than 1000mm diameter. Section B2 provides an overview of the formal rules for the extended field of application of data obtained from fire tests to BS EN 1366-1 A. The bending stress in the horizontal load-bearing member of the suspension device shall not exceed that tested.5m. Fire exposure of ducts Test results are not interchangeable between internal fire exposure and external fire exposure. for ducts tested to BS EN 1366-1 A. Shape of ducts The test results are not interchangeable between ducts with a different shape. then additional tests are required as described in BS EN 15882-1. If additional tests are undertaken as described in prEN15882-1.2 Overview of the critical parameters for extended field of application.2. Table 5.uk 39 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . Height of vertical ducts If the unsupported height between floors is greater than 5m then additional tests are required as described in prEN 15882-1.org.APPENDIX A2 Explanatory notes for the rules of extended field of application of test data (EXAP) according to BS EN 15882-1.2. Pressure difference If pressure differentials are required for the ducts that are higher than those tested or ±300Pa. Access panels If access panels are to be fitted to the duct system then an access panel of the same design must be tested as described in BS EN 1366-1. Vertical and horizontal ducts Test results are not interchangeable between vertical and horizontal ducts. For full details refer to BS EN 15882-1. Suspension devices for horizontal ducts The maximum values for tensile stress and shear stress within the steel suspension devices are as given in prEN 15882-1. additional tests are required as described in BS EN 15882-1.1 INTRODUCTION The formal EXAP rules are published separately as BS EN 15882-1 in the United Kingdom. Factors included in the table are: • • • Orientation – Vertical or horizontal Fire exposure – Fire outside or inside Presence of combustible materials within duct Association for Specialist Fire Protection / www. circular and rectangular ducts. precautions must be taken to prevent the extension of the hangers exceeding 40mm. The table includes the likely influence of these factors on the performance criteria and includes rules stating whether or not the factors will adversely affect the fire resistance performance and whether additional tests are necessary. Construction details and parameters that may affect the fire resistance performance of ducts Construction details and parameters that may affect the fire resistance performance of ducts are listed in Table 4 of prEN 15882-1.g.asfp. EXAP The following provides a brief description of the principles behind the rules for the extended field of application of test results. The formal rules allow certain variations in ductwork systems without declassification of the data from the tested ductwork configuration. For unprotected hangers with a length more than 1. 1 Introduction The formal DIAP rules are part of the European test standard EN 1366-8 which is published as BS EN 1366-8 in the United Kingdom. as given in BS EN 1366-1.3. Sizes of ducts Association for Specialist Fire Protection / www. section modulus Anchors – Type of anchor.2 provides an overview of the formal rules for direct field of application of data obtained from fire tests to BS EN 1366-8 A. it is a requirement for fire resisting smoke extraction ducts that the document under pressure of 300Pa. ducts A (500Pa under-pressure) and B. chemical or mechanical.org. staples to screws Inclined/sloping ducts Corner joint details – Changes in arrangement of corner joints for ducts constructed with boards See prEN 15882-1 for more detailed explanations. and without the need to seek further expert/specialist fire safety advice. position relative to any duct joint Bearers – Bending stress. stainless to galvanised steel. tensile stress. two or three sided ducts is permitted.g. For full details refer to BS EN 1366-8. Section A.• • • • • • • • • • • • • • • • • • • • • • • • • • • Changes in negative pressure Positive pressure Change in shape (e. spigot to flange Mechanical fixings – Screws to staples. DIAP The following provides a brief description of the principles behind the rules for the direct field of application of test results. is increased to 500Pa when testing to EN 1366-1. shear stress.3.2 Overview of the critical parameters for direct rules of application.uk 40 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . penetration depth Self-weight of duct Hanger protection Length of vertical ducts between supports Effect of supports on vertical ducts Steel duct properties – Galvanised to stainless steel. flange to spigot. Vertical and horizontal ducts A test result obtained for horizontal smoke extraction ducts is only applicable to horizontal smoke extraction ducts unless vertical ducts are made to the same design and vertical ducts A and B have been tested to BS EN 1366-1 without failure. The formal rules allow certain variations in ductwork systems without declassification of the data from the tested ductwork configuration.3. and BS EN 1366-8. For duct A.asfp. No extrapolation to one. rectangular to circular) Pieces of ductwork for change of direction or cross section or for separation of air streams Height of cross section Width of cross section Thickness of protection Length of duct between flanges/spigot Distance between board joints Change in wall/floor type or thickness Change in diameter of cross section for circular ducts Change of protection material Distance between stiffeners Number of protective layers Changes in penetration seal system around duct Effect of access panels Hangers – Changes in length. Shape of ducts The field of direct application only covers ducts tested to BS EN 1366-1. Section 13. strength. The method of test is only appropriate to fire resisting ducts that have passed the test for the appropriate period to BS EN 1366-1 (ducts A and B). APPENDIX A3: Explanatory notes for the rules of direct field of application of test data (DIAP) for ducts tested to BS EN 1366-8 A. 4. For full details refer to BS EN 15882-8 APPENDIX A5: Explanatory notes for the rules of direct field of application of test data (DIAP) for ducts tested to EN 1366-9 A. for ducts tested to BS EN 1366-8 A. If higher values are possible then additional testing may be needed. If higher values are possible then additional testing may be needed. Above 500Pa.1 INTRODUCTION The formal EXAP rules are published separately as BS EN 15882-8 in the United Kingdom.2 OVERVIEW OF THE CRITICAL PARAMETERS The following text provides a brief description of the principles behind the rules for the extended field of application of test results. Sizes of ducts Provided that the standard sizes of duct are tested.2 provides an overview of the formal rules for direct field of application of data obtained from fire tests to BS EN 1366-9 A. up to 1500Pa.6. Section 13. for ducts tested to EN 1366-9 A. The formal rules allow certain variations in ductwork systems without declassification of the data from the tested ductwork configuration. Section B2 provides an overview of the formal rules for the extended field of application of data obtained from fire tests to BS EN 1366-8 A.5.5. APPENDIX A6: Explanatory notes for the rules of extended field of application of test data (EXAP) according to EN 15882-8.Provided that the standard sizes of duct are tested. a limited extrapolation is permitted for larger sizes of duct. a limited extrapolation is permitted for larger sizes of duct. No extrapolation to one. Above 500Pa. The formal rules allow certain variations in ductwork systems without declassification of the data from the tested ductwork configuration. Vertical and horizontal ducts Test is designed for horizontal ducts only. as detailed within the test standard. Ducts smaller than those tested are also covered. Ducts smaller than those tested are also covered.1 INTRODUCTION The formal EXAP rules are published separately as BS EN 15882-8 in the United Kingdom. For full details refer to BS EN 1366-9.4.asfp. DIAP The following provides a brief description of the principles behind the rules for the direct field of application of test results. the maximum tested under pressure in duct C is applicable to a maximum overpressure of 500Pa. APPENDIX A4: Explanatory notes for the rules of extended field of application of test data (EXAP) according to EN 15882-8. It represents fire exposure of a developing fire (pre-flashover). the maximum tested under pressure in duct C is applicable to a maximum overpressure of 500Pa.uk 41 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . and without the need to seek further expert/specialist fire safety advice. Shape of ducts The field of direct application only covers circular and four-sided rectangular ducts. Pressure difference Up to a value of 500Pa the maximum tested under pressure in duct C is applicable to the same maximum overpressure.5. Association for Specialist Fire Protection / www. Section A. as detailed within the test standard. Pressure difference Up to a value of 500Pa the maximum tested under pressure in duct C is applicable to the same maximum overpressure.1 Introduction The formal DIAP rules are part of the European test standard EN 1366-9 which is published as BS EN 1366-9 in the United Kingdom. up to 1500Pa. The method of test is only appropriate to smoke extraction ducts that do not pass through into other fire compartments.org. two or three sided ducts is permitted.2 Overview of the critical parameters for direct rules of application. If the fire separating element is of a different type of construction from that tested. The fire resistance test for ducts (BS EN 1366) is designed to evaluate the fire performance of the duct penetration seal system through a wall or floor construction (the fire separating element). The EN 1366 fire tests on ducts are carried out on specimens in the horizontal orientation and in the vertical orientation. Most of the fire tests on duct penetration seal systems have been carried out through concrete floors or masonry/concrete walls. the top horizontal face of horizontal ducts will tend to sag. Note that the damper must be mounted in the wall or floor and must be supported/ restrained independently of the ductwork. The extent of any Association for Specialist Fire Protection / www. The performance of the system will depend on several factors as follows: B. The primary reason for providing fire-resisting ductwork systems is to maintain the fire resistance of a compartment wall or floor of a building.1 Thermal expansion or shrinkage of ductwork system Systems based on steel ductwork will expand in fire. APPENDIX B: Explanatory guidance for the use of fire stopping as penetration seals. but the construction of the duct may have to be modified or the duct locally strengthened at the penetration. For full details refer to BS EN 15882-8. Therefore it is not possible to separate the fire performance of the penetration seal from the construction of the duct. Section B2 provides an overview of the formal rules for the extended field of application of data obtained from fire tests to BS EN 1366-9 A. The damper and associated penetration seal must be installed to a procedure substantiated by test. The penetration seal and the ductwork are considered as one integral system and for the field of direct application must be the same as that tested or assessed in accordance with BS 476: Part 24. A successful test on a penetration seal fitted around one type of duct construction does not mean that the penetration seal is suitable for use with a different type of duct construction. EXAP The following provides a brief description of the principles behind the rules for the extended field of application of test results. as well as the fire performance of the duct system itself. This movement may dislodge the seal. or have been assessed as being suitable.1.org. for duct sizes larger than that tested.The formal rules allow certain variations in ductwork systems without declassification of the data from the tested ductwork configuration. This is usually achieved in one of two ways: i) ii) For fire resisting ductwork a penetration seal is fitted between the duct and the wall or floor. Where fire resisting ductwork adjoins a damper fitted in a wall or floor the penetration seal to the wall or floor must be installed as (ii) above. If the penetration seal system fails to satisfy the test criteria during the test then the duct or damper system is also deemed to have failed. The fire performance of the penetration seal system must be demonstrated for the orientation in which the duct is being used. causing gaps to form at the seal.1. B. It is therefore critical that the correct method of sealing any gaps around the ductwork is used as it passes through any compartment wall or floor. Usually the penetration seal will be suitable for duct sizes smaller than that tested. For non-fire resisting ductwork a fire damper must be fitted in the plane of the wall or floor. support systems & ancillary items B.asfp.2 Overview of the critical parameters for extended field of application. then an indicative fire test and an assessment should be carried out to ensure that the duct penetration seal system and/or any damper restraint system is compatible with the different fire separating element for the required fire rating. an integrity failure of the penetration seal system is often caused by the movement or distortion of the duct.uk 42 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . and self-supporting systems may shrink.1 PENETRATION SEALS Where ductwork passes through a compartment wall or floor it must be ensured that the fire separation of the wall or floor is maintained. Similar comments apply for duct sizes other than that tested.6.2 Deformation of ductwork The sides of any ductwork system are likely to deform in fire conditions. for example a timber floor or a fire rated partition system. In a fire situation. In particular. The purpose of the penetration seal system is to seal the gap between the duct walls and the surrounding wall or floor. This detail is one of the most common reasons for the failure of the ductwork system in a fire resistance test. c) the location of any joints or stiffeners in the system within. attenuators. They should be non-combustible and/or shown by test to be suitable for the fire rating conditions Stresses within the support components can be reduced by increasing the size of the components. Attention must be given to the spacing of the supports and the size of the support components in accordance with the manufacturer’s test data and recommendations. ƒ If supports were positioned at all duct joints within the furnace in the fire test then the supports must be located at all duct joints in practice. the fixings and brackets. fans. filters.1. The collars should be fixed as tested. partition. the wall or floor. The size of the collar should be adequate to overlap the wall.5 Surrounding construction The performance of the seal will depend on the type and depth of the wall.org. or floor to at least the same extent as tested. and can be thicker. it is not advisable to fix the collar to both the ductwork and a non-load bearing partition as the thermal movement of the ductwork may have an adverse effect on the performance of the partition. B. the surrounding construction must have at least the same fire resistance as the construction used in the test. B. or close to. as the amount of intumescing material in the gap may be inadequate to allow effective expansion.g.2 SUPPORT SYSTEMS The support systems used for fire resisting ductwork must be capable of bearing the load of the ductwork under fire conditions. if the ductwork has been tested passing through a concrete wall. or to both.1. d) the location of any internal stiffeners within. denser. Generally. The collars used in the fire test may have been fixed to the ductwork. e) the size of any stiffeners and f) the position and size of the hangers on both sides of the wall. For the required fire rating.asfp. do not exceed – ƒ The maximum allowable span of the duct between supports ƒ the maximum distance of the hangers from the side of the duct ƒ the maximum allowable stress within the components of the supports The fixings should be carefully selected for the substrate and loading. if gaps have been sealed with intumescing materials.deformation will depend on a) the size of the duct. or to the wall or floor. B.3 ANCILLARY ITEMS / IN-LINE EQUIPMENT A fire rated duct will often adjoin a component or structure which does not form part of the tested ductwork system. or to seal any increase in the gap size during a fire. or reducing the spacing of the supports. B.3 Gap size The size of the gap between the duct and the wall or the floor will affect the performance of the seal. However. Generally. or have more layers of board. b) the materials used to form the ductwork.1. partition. the wall or floor. the more likely a failure is to occur. the bigger the gap. in situations where a damper tested only for installation in the plane of a wall or floor has been installed remote from a wall or floor). or close to. etc. The performance of the seal may vary depending on the type of surrounding construction it is passing through.uk 43 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . as appropriate. and could have in-line equipment and control devices such as balancing dampers. ƒ The element of building construction to which the support systems are attached must have a fire rating of at least that specified for the duct and be able to support the weight of the duct under fire conditions. B. It may be possible to protect the duct on both Association for Specialist Fire Protection / www.6 Specification of seal The specification of the seal fitted to the duct at the penetrations through fire compartment walls and floors should be the same as the tested system. For example.1. or floor. The performance characteristics of the fire-rated duct must be continued through these ancillary items of equipment to ensure the fire resistance of the system is maintained. its performance may be different when passing through a lightweight partition system.4 Collars Several ductwork systems employ collars fitted around the ductwork on each side of the wall or floor as part of the penetration sealing system. or applying fire protection to the support systems. Fire Dampers It is not recommended for fire resisting ductwork to be randomly used to rectify incorrect installation or positioning of dampers (e. Generally. a reduction in the gap size may have an adverse effect. B. The support system consists of the hangers and bearers. the construction of a newly erected metal duct should be the subject of like scrutiny. The ‘change over’ of responsibility occurs at the interface between the fire resisting ductwork and the elements. walls. DW /144. unless the flexible steel duct system has been tested in accordance with BS EN 1366-1. f) It is essential when choosing a fire rated duct system that it is fit for the purpose to which it is being applied. it is imperative that the construction standard of the metal duct is checked for conformity with the appropriate fire test report.g.) lies with the installer of each particular element. bolting centres. etc. Therefore. g) During any defined non-fire operating conditions. k) It is recommended that the installed fire rated duct system be verified by the use of a quality system.asfp. laboratories accredited by UKAS for conducting the relevant test might be expected to have the necessary expertise. fire resisting ductwork must be capable of both performing and being tested to the ductwork classification and the air leakage limits of the designated ductwork specification. spacing of hanger supports and fixing method to the soffit should all be checked for compliance with the fire tested construction. The building designer. Considerations other than the successful completion of a BS EN 1366-1 fire test on a sample section of ductwork may need to be given when assessing the suitability of a fire rated duct for a particular application. i) In the case of an existing metal duct. where application of a fire insulation cladding material to provide fire resistance is considered. Metal gauge. and that the fire damper can operate as intended. It is not sufficient to rely on a DW/144 construction classification for fitness for purpose in this regard. provided that a positive independent assessment has been carried out B. Design Notes for Ductwork. j) For the purposes of independent assessment. branches and changes of section must all be in accordance with DW /144 and CIBSE Technical Memoranda TM8. This will enable the supplier/installer to provide documentary evidence of the conformity of the installed system and its components. the air flow characteristics of ductwork and its associated components such as bends. use of steel / aluminium rivets. 90 minutes. h) In general.. mechanical services designer and the installer all have a responsibility to pay ‘due care’ to this detail. unless clearly defined otherwise. this guidance cannot be assumed to apply. including supporting systems and penetration seals. e. sealants.stability. based upon the ISO 9000 Series. cavity barriers. Similarly. a) The term Fire resisting ductwork is deemed to refer to a system as tested or assessed in accordance with BS EN 1366-1. d) The element of building construction to which the support systems are attached must have a fire rating of at least that specified for the duct and be able to support the weight of the duct under fire conditions. Where only a single time period is expressed it shall be deemed to apply to all three components.org. spacing & size of flanges and stiffeners. e) Fire resistance of a fire resisting ductwork system shall be expressed as the three time period components . Reference is made to the Field of Application section within this guidance.g. It is imperative that the interface detail does not compromise the fire performance of either the element of building construction or the fire rated duct. (e. As the vast majority of tests on steel ducts are conducted with rigid ducts it is not appropriate to extrapolate this data for flexible steel ducts. c) Fire resisting ductwork systems shall be deemed to include all the components as tested or assessed.g.4 INTERFACE BETWEEN FIRE RESISTING DUCTWORK & ELEMENTS OF CONSTRUCTION Responsibility for the satisfactory performance of each element of building construction (e. integrity and insulation. APPENDIX C: Limitations of fire resisting ductwork systems General This list sets out the principal limitations in the scope of the guidance given in this publication and is not intended to be exhaustive.uk 44 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . Verification will required and Association for Specialist Fire Protection / www.sides of the wall – up to the damper – to ensure that fire compartment is maintained. floors. stability & integrity only). b) Service ducts are not included within this guidance. However it is incumbent upon the designers and providers of such damper installations to verify that they have been appropriately tested adopting the procedures and criteria of BS EN 1366-1. Where such items are within a fire resisting ductwork run.asfp. l) Light gauge specifications such as DW/144 recognise many machine forming techniques for ancillary items such as air turning vanes and the increased gauges associated with fire resisting ductwork systems may not only preclude the use of such techniques but may also.2. In very simple terms. or fire resisting expansion devices/compensators should be included within the ductwork. APPENDIX D: Regulations. It regulates new building work or material alterations to existing buildings. • Modern Acts contain provisions which authorise others. • Building control is affected by the Building Act 1984 and its subsidiary legislation and guidance documents. as outlined in Appendix A n) For the field of direct application. Responsibility is therefore deemed to end with the interface. such as departments of state. may publish approved documents which may either (a) give advice about compliance with an Act or Regulations.2 BUILDING REGULATION IN THE UNITED KINGDOM D. out of necessity.include research. checking or test of existing ductwork installations which are being modified and / or over-cladding to provide a fire rated system.uk 45 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . office-holders or Bodies (e.1 (Ventilation duct test) which meets criteria of stability. The ductwork route should either be reconsidered. q) Special care must be taken with in-line items of equipment such as fans.org. building work in the United Kingdom is regulated in the following manner: • UK Parliament produces Statutes (Acts of Parliament). volume control dampers. save for their assumed levels of adequacy. which. codes and requirements D.3) Association for Specialist Fire Protection / www. official bodies. any penetration seal must be the same as that used in the original BS EN 1366-1 test.1 England and Wales There are two principal branches of building legislation and fire safety in England and Wales. • Finally. m) A fire rated duct tested to BS EN 1366.1 INTRODUCTION TO REGULATIONS Fire protection is intended to preserve life and property. • Requirements to establish and maintain fire safety in buildings in use are contained in the Regulatory Reform (Fire Safety) Order 2005 (clause 5. D.1 o) Where fire dampers are connected to a fire rated duct it is assumed by this guidance note that the combined installation is adequate for the required fire resistance.. r) The expansion of the ductwork could cause excessive forces on an associated wall or floor construction and penetration seals. to make regulations on particular subjects within the scope of application of an Act. or (b) cite other sources of relevant information (such as British Standards). introduce a geometric change that may require the approval of the HVAC designer in terms of a component's air flow characteristics. integrity and insulation may not be suitable for kitchen extract application or smoke extract application unless proven by additional test criteria. Effective fire retardant products and systems play a critical role in restricting the spread of flame and in reducing the rate of heat release from surfaces and thereby help limit the contribution that that the fabric of the building makes to the fire growth. p) This guidance does not address the complex and detailed issue of fire and/or smoke dampers or any other fire resisting components or elements of structure with which the fire resisting ductwork system interfaces. a Secretary of State). attenuators etc. see section 6. Access provisions to the ductwork for cleaning and maintenance should also maintain the fire performance of the duct to which they are fitted. to lessen the effect of expansion on the penetration seals. the item of equipment must maintain the full fire performance of the duct into which it is fitted or it must be installed within its own fire rated enclosure (same performance as the duct). edicts of the legislature. could result in their failure under fire conditions.g. the relevant legislation is the Building (Scotland) Regulations 2004 (Scottish Statutory Instrument 2004 No.uk D. and are aimed at providing guidance for those seeking to meet the requirements of the Building Regulations in a prescriptive manner.opsi.asfp.3 Scotland In Scotland there is a similar divide. reference should be made to the guidance given in the above mentioned documents. Experienced designers will know all about the Building Regulations as they apply to domestic or other types of buildings.3. for new buildings of alterations and the Fire (Scotland) Act 2005 for existing buildings.2. which produces a series of Technical Booklets to aid compliance with the Regulations.6 Channel Islands The procedure for building control varies across the islands but is broadly similar to the system in England and Wales. The result was the Regulatory Reform (Fire Safety) Order 2005. which are available in two volumes. comprising an item of subsidiary legislation supported by a set of technical guidance publications. simplified fire safety regime which would have general application across workplaces and non-domestic premises. 2.3 FIRE SAFETY LEGISLATION FOR EXISTING BUILDINGS D. but Byelaws in Jersey.uk 46 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . D.gov.dfpni. Guidance on achieving the standards set in the Building Regulations is contained in the Scottish Technical Handbooks (revised in May 2007). Much of the Act is concerned with building regulations and related matters.D.2.co. Technical Booklet E covers fire safety: for more information go to www. 406.4 Northern Ireland In Northern Ireland. The current Building Regulations are the descendants of a long line of Statutory Instruments on the topic and the 2000 version (The Statutory Instrument Building Regulations 2000 (SI 2000.thefpa.1 Regulatory Reform (Fire Safety) Order 2005 The UK Government carried out a major review of many existing pieces of legislation relating to fire safety.uk and search successively for Building Regulations and Technical Booklets. D. Approved Documents exist in support of the Building Regulations and are issued by the Secretary of State.5 Isle of Man In the Isle of Man building control operates via the Manx Government’s Building Regulations 2003.). and for extensions or alterations to existing buildings. Risk assessment is a vital part of the planning process and is dealt with below. The Handbooks are available to view online or download in full or part in PDF format via www. They are Regulations in Guernsey.2. in terms of design and construction. For new buildings.2. 829/03. as amended). NOTES 1. The Building Regulations present the requirements which must be complied with. It is a Statutory Instrument which repeals a great deal of existing fire safety legislation and while a full account of its provisions is beyond the scope of this publication the text of the Order is available at www. Statutory Document No. which came into effect on 1 October 2006 and applies in England and Wales.2 Building Act 1984 The Building Act consolidated much of the primary legislation relating to building which then existed in other Acts of Parliament.uk/tech_handbooks/tbooks2007 D. made under the Island’s Building Control Act 1991. The new system of regulation is risk-assessment based and includes the provision that the person responsible for a building should undertake duties for fire safety therein. It covers ‘general fire precautions’ and other fire safety duties needed to protect ‘relevant persons’ in case of fire in and around most ‘premises’.uk (the website of the Office of Public Sector Information).org. For commercial and industrial buildings. They may only just be finding out about the possible effects of the Regulatory Reform Order. (‘SI 2005 No 1541’). Building control matters are the responsibility of the Department of Finance and Personnel. broadly to ensure the health and safety of those who occupy or visit buildings. property and business insurance may also be an important consideration. The Order requires fire precautions to be put in place where necessary and to the extent that it is reasonable and practicable in the circumstances of the case. dealing with Domestic and Non-domestic buildings.sbsa. The Department for Communities and Local Government (CLG) has published a series of guides which introduce Association for Specialist Fire Protection / www. buildings which are changing their use. the main aim being to arrive at a single. the controlling legislation is the Building Regulations (Northern Ireland) 2000 (Statutory Rule 2000 No.2.gov. 389. No.gov. 2531)) has been amended several times since first issued. D. Useful information can be found in the FPA Design Guide for the Fire Protection of Buildings or go to www. asfp.uk/buildingregulations D.com/firelaw and • www2.4 CONSTRUCTION DESIGN AND MANAGEMENT REGULATIONS 2007 The Construction Design and Management Regulations (CDM) require all concerned in the process from design inception to completion of the building to prepare a file (the CDM file) containing details of all the work undertaken and materials used where safety is concerned. along with Houses in Multiple Occupation D. Approved Document B indicates that a preliminary risk assessment can be used as part of a Building Regulations submission and can help identify if any additional features need to be considered with respect to the first occupation of a building.co. but is not an exhaustive list • 11 new Risk Assessment Guides for buildings in different types of occupation • Department of Health HTM 05 Series.HTM 05-01 Managing Healthcare fire safety . Schools and Families entitled Building Bulletin 100 – Designing & managing against the risk of fire in schools.3 Government sources of further information • www. designers may find that the Order brings them on board much earlier in the process.employers.uk/publications.dfpni.thefpa.Fire and the design of educational buildings (DES) 1988] D.gov. Guidance on the consultation procedures that should be adopted to ensure that the requirements of all enforcing authorities are addressed at the stage of Building Regulations approval is given in the publication Building Regulation and Fire Safety: Procedural Guidance (published jointly by CLG and the Welsh Assembly Government) Supporting Documents The following supporting documents may be useful.uk APPENDIX E: Bibliography E.gov. This legislation is also based on the ongoing fire safety risk assessment of buildings.infoscotland.thefpa. at the stage of considering fire risk assessments for new workplaces or major alterations of existing premises. managers. together with other publications on behalf of the RISCAuthority insurance organisation www. under the generic title ‘Fire safety risk assessment’ While the Order is principally an item of secondary legislation dealing with responsibilities for and practicalities of implementing fire safety in workplaces (and some parts of blocks of flats and of houses in multiple occupation). Similar changes are expected in Northern Ireland.uk/construction/cdm/summary. modifications to the building or Fire Risk Assessments as required by the Fire Precautions (Workplace) Regulations. this means that Fire Certificates will be abolished and an existing fire certificate will no longer have effect.uk • www.co. including . See www.gov. The local fire and rescue authority is the enforcing authority for the provisions of the Order.planningportal.and related subordinate legislation – also introduced a new fire safety regime on 1st October 2006. The CDM file can be an invaluable source of information on all aspects of fire safety work in the construction of the building that may be used by the occupant when preparing maintenance plans.hse.HTM 05-03 Operational provisions • A new publication from the Department for Children. occupiers and owners to the new fire safety regime as it affects a variety of types of premises.org. [replaced BB 7 . The relevant web page is http://www.htm D5 OTHER DOCUMENTS London District Surveyors Association Fire Safety Guide No 1 .1 BRITISH STANDARDS BS 476: Fire Tests on Building Materials and Structures Part 4: 1970 Non-combustibility test for materials 1984 Non-combustibility test for materials Association for Specialist Fire Protection / www.HTM 05-02B Fire engineering provisions . Part 3 of the Fire (Scotland) Act 2005 .2 Fire (Scotland) Act 2005 In Scotland.HTM 05-02A Guidance in support of functional requirements .uk 47 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 .Section 20 Buildings: 1997 Fire Prevention Association FPA Design Guide for the Fire Protection of Buildings.3. The responsibility will be with all those having any degree of control over nearly all non-domestic premises. In all cases.3. uk 48 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . Part 2: 1990 Specification for powered smoke and heat exhaust ventilators E. BS ISO 10294 Fire Resistance tests . Part 2: 1999 – Classification.Test method.Fire dampers BS EN 1366-3 Part 3 .Service ducts and shafts BS EN 1366-8 Part 8 .Single compartment smoke extraction ducts BS EN 1366-10 Part 10 .Smoke control dampers BS EN 13501: Fire classification of construction products and building elements: Association for Specialist Fire Protection / www.org.Multi compartment smoke extraction ducts BS EN 1366-9 Part 9 .2 E. criteria & field of application of test results Part 3: 1999 – Guidance on the test method Part 4: 2001 – Test of thermal release mechanism Part 5: 2005 – Intumescent fire dampers ISO STANDARDS (International Organisation for Standardisation) ISO 834: Fire resistance tests – Elements of building construction ISO 834-1:1999 Fire resistance tests – Elements of building construction: Part 1 General requirements ISO 6944-1 Fire Resistance Tests – Elements of building construction: Part 1 Ventilation ducts ISO 6944-2 Fire resistance tests – Elements of building construction: Part 2 Kitchen extract ducts ISO 9000: 2000 Quality management systems – Fundamentals and vocabulary IS0 9001: 2000 Quality management systems – Requirements EUROPEAN STANDARDS (CEN) BS EN 1366 Fire resistance tests for service installation BS EN 1366-1: 1999 Part 1 .Penetration seals BS EN 1366-4 Part 4 .3 BS 8313: 1989 Code of practice for accommodation of building services in ducts.asfp.Linear joint seals BS EN 1366-5 Part 5 .Ducts BS EN 1366-2: 1999 Part 2 .Fire dampers for air distribution systems Part 1: 1996 .Part 6: 1981 1989 Method of test for fire propagation for products Method of test for fire propagation for products Part 7: 1971 1987 1997 Surface spread of flame test for materials Method for classification of the surface spread of flame of products Method of test to determine the classification of the surface spread of flame of products Part 11: 1982 1988 Method for assessing the heat emission from building materials Method for assessing the heat emission from building materials Part 20: 1987 Method for determination of the fire resistance of Elements of construction (general principles) Part 21: 1987 Methods for determination of the fire resistance of load bearing elements of construction Part 22: 1987 Methods for determination of the fire resistance of non-load bearing elements of construction Part 23: 1987 Methods for determination of the contribution of components to the fire resistance of a structure Part 24: 1987 Method for determination of the fire resistance of ventilation ducts (ISO 6944) BS 5669 for impact test information BS 7346 Components for smoke and heat control systems. 1 STANDARD METHOD OF MEASUREMENT OF BUILDING WORKS The measurement of fire resisting ductwork should follow the guidelines of Tables Y30 and Y31 of SMM7 [Standard method of measurement . 60 minutes stability. shape and size of cross joints Maximum spacing for hangers and bearers Any required fire protection layers or insulation – with material.g.e. smoke extract or kitchen extract Duct type – self supporting construction. factory made fire resisting duct.BS EN 12101-7 E. floors or fire resisting division.uk 49 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 .org.. This is a minimum list for fire assessments to be reliably made. NOTE that fire resisting ductwork must be measured as a complete item in linear metres with ancillaries and fittings described and measured separately.asfp.7th Edition: 2000] as published by the Royal Institution of Chartered Surveyors. ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ Duct function – ventilating. thickness and fixings Fire resistance requirement . ISBN 08540 63609.4 Part 1: Classification using data from reaction to fire tests Part 2: Classification using data from fire resistance tests. low medium and high pressure velocity systems (supersedes DW/142) DW/145:2008 Guide to good practice for the installation of fire and smoke dampers DW/172: 2005 Standard for kitchen ventilation systems TR/19: 2005 HVCA Guide to good practice – Internal cleanliness of ventilations systems APPENDIX F: Standard specifications & method of measurement of building works F. or fire protection cladding added to specified steel ducts Duct orientation – horizontal or vertical Duct size – longer side or diameter Thickness of steel. 60 minutes integrity and 60 minutes insulation when tested in accordance with EN 1366) The detail of the seal at any service penetration through compartment walls. Association for Specialist Fire Protection / www. the type and maximum spacing Any use of internal duct stiffeners or tie rods Maximum duct section length Type. board and/or coating Duct shape Any stiffening of the duct panel Any stiffening of the duct . It is essential that any bill of quantities description for fire resisting ductwork includes ALL of the following. excluding ventilation services Part 3: Classification using data from fire resistance tests on products and elements used in building service installations: fire resisting ducts and fire dampers Part 4: Classification using data from fire resistance test on components of smoke control systems Smoke and heat control systems Part 7: Smoke control ducts BS EN 15882-1 EXAP rules for fire resisting ducts tested to EN 1366-1 BS EN 15882-8 EXAP rules for fire resisting ducts tested to EN 1366-8 or EN 1366-9 HVCA DOCUMENTS DW/143: 2000 A practical guide to ductwork leakage testing DW/144: 1998 Specification for sheet metal ductwork. which are to be used if they differ from those for galvanised sheet steel. and __(2)iii)__ minutes insulation when tested to the requirements of EN 1366 by a UKAS approved or recognised laboratory.500 Pa Medium Class B Up to + 1000 Pa Down to . the standard Specification should read: ‘The ___(1)___ Ductwork should be constructed in accordance with the ASFP Guide to Fire Resisting Ductwork to provide __(2)i)__ minutes stability. __(2)ii)__ minutes integrity. For acceptance in this ASFP publication. See Rules 1 to 5 as stated below. All claims will be based on EN Fire Resistance classification and test methods. the CPR. GENERAL These rules supplement the procedure for ASFP members to submit product data sheet entries for inclusion in ASFP Publications. The Specification should therefore: 1) Define the type of ductwork. Association for Specialist Fire Protection / www. When that happens. The claims in the product data sheets will be confirmed by the 3rd party Certification Body. which replace BS 476 Part 24 fire test data for use in regard to European Construction Products Directive. as provided in ASFP document TCOM 08_17.750 Pa High Class C Up to + 2000 Pa Down to .750 Pa High Class D Up to + 2500 Pa Down to . With reference to the above factors. 6) It is recommended that the manufacturer/installer is working to a Quality Assurance System based upon the ISO 9000 series.2 STANDARD SPECIFICATION In order to ensure fire resisting ductwork is correctly specified prior to the commencement of work. the data is all subject to 3rd party product certification as a basic condition of entry.uk 50 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . BS 476 Part 24 test data will only be applicable for non. The claims made must also satisfy the criteria in Rules 1 to 5 as listed below.750 Pa NOTE that these classifications are to HVCA DW /143 and 144 requirements 5) The Fire Duct manufacturer should define the friction resistant coefficients of all bends and tapers. several factors should be carefully considered and defined.’ APPENDIX G: Criteria of acceptability of data sheet entries LEVEL OF ENTRY The ASFP ‘Blue Book – European version 1st Edition’ makes provision for data sheets based on BS EN fire test and classification methods.CPR applications for construction products. may demand mandatory compliance with BS EN standards around mid 2011.asfp. under normal non-fire operating conditions. It should be noted that. The ductwork should be capable of providing Type ___(3)___ fire containment and. and as Section 1 ‘Scope’ of this publication. should conform to the ___(4)___ pressure classification of the current HVCA DW/144 Specification for Sheet Metal Ductwork. to enable specific UK Regulatory requirements to be satisfied.Smoke / Ventilation / Kitchen / Pressurisation 2) State the required fire classification to EN 13501-2 in minutes for: i) ii) Integrity E iii) Leakage S Insulation I 3) Define if the system is Duct Type A (fire outside) or Duct B (fire inside) or requirement for both ’fire inside’ and ‘fire outside’. as . 4) Define Static Pressure Limits – Pressure / velocity Class Low Pressure level range Positive pressure Negative pressure Class A Up to + 500 Pa Down to . at the time of writing. the proposed European Community’s Construction Products Regulation.F.org. etc. insulation and leakage in fire 3. or BS EN1366-9 for single compartment smoke ducts.1 Guidance on the use of system data information The following product data pages will be extended as new European test data becomes available. 5 years. RULE 3 – DIRECT AND EXTENDED FIELDS OF APPLICATION The field of application for the classification obtained from test data can fall into two cases. It should be noted that all standard documents are reviewed on a regular basis. and considered for use in this ASFP publication. The specific product literature of system holders should always be referenced to consolidate the initial selection. providing the claims being made are confirmed in writing to the ASFP by the Certification Body. The classification documents call up BS EN1366-1 for fire resisting ducts. If the draft standard is significantly changed. The fire resistance to EN 1366 in terms of stability.uk 51 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . Some system holders may have elected to include other additional information so as to assist the correct use of the relvant ductwork system. or circular. to system specifiers. and before installation is made. The web links are provided on each descriptive product page to assist this process. etc 2.1 GUIDANCE TO DUCT SYSTEM DATA SHEETS & CAUTIONARY NOTE H. The design of a fire resisting ductwork system is generally dependent on the following factors – 1. The classification report will provide the agreed scope of application RULE 4 – 3RD PARTY PRODUCT CERTIFICATION SCHEMES For inclusion in this publication. Where fire resisting ducts are listed by such a Certification Body. The ASFP has ensured that a minimum level of key information is included either in the system Tables or in the Notes accompanying each Table.1. and in ensuring that the ‘as-built’ system fulfills the claims of the tested system. The type of ductwork system as used for ventilation OR smoke extract OR kitchen extract. in order that a classification document can be issued. The rules for direct field of application are provided in the test standard. APPENDIX H: Data Sheets H. and in EN 15882 – 8 for smoke control ducts. 4. then the classification may need to be withdrawn by the Notified Body and Certification Body as advised by CEN TC127. that there are a very large number of variables that must be considered in selecting or specifying the appropriate system. as defined elsewhere in this document.asfp. They will outline the capabilities of different fire resisting duct arrangements as available from ASFP member companies. Rules for extended application are given in EN 15882-1 for ducts. integrity.RULE 1 – PRIMARY DATA [a] Submissions for data entry into the ASFP ‘Blue Book’ for fire resisting ductwork shall be made in accordance with BS EN 13501 Parts 3 and 4 classification standards for [i] fire resisting ducts and for [ii] smoke control ducts respectively. UKAS (accredited to ISO 17025). Any requirements or limitations for:- Association for Specialist Fire Protection / www. direct or extended fields of application. fire resisting products must have been tested to the satisfaction of independent accredited 3rd party product certification schemes (ISO Guide 65) covering the test data required in Rule 1 and recognised by the UK Accreditation Service. then they will be deemed acceptable for entry into the ASFP ‘Blue Book’ for fire resisting ductwork data sheets. Whilst all the data has been independently assessed by 3rd party certification bodies or reviewed by ASFP Technical Review Panel. [b] Entries into the ASFP data sheets may also be produced from test data and classification documents using published draft European standards (prEN). the ASFP points out. or as flat oval shape 5. RULE 2 – SECONDARY DATA Rules for direct or extended fields of application will state whether or not national or historical test data can be used for classification purposes. The cross-sectional shape of the ductwork system.org. as rectangular. BS EN1366-8 for multi-compartment smoke ducts. either horizontally or vertically or both. and subject to amendment without withdrawal of the original classification document [c] Test data for BS EN1366-1 must be available before any test data is obtained on the same system to BS EN1366-8. The orientation of the duct in use. RULE 5 – UNCERTAINTY OF DATA The ASFP Technical Review Panel reserve the right to review all and any submissions and claims being made for use in ASFP publications. g. Any references to 3rd party product certification schemes will be limited to those accredited or recognised by UKAS.a. 7. and on performance at high air velocity or pressure. including the use of seals or gaskets 6. DUCTWORK SYSTEM SUPPLIER DUCTWORK SYSTEM NAME Note to readers – The ASFP has determined a minimum requirement for the scope of the following tabulated data. It is not the intent to provide a full engineering specification.org. or converted into. d. c.asfp. DUCT SYSTEM DATA SHEETS It should be noted. as tested to BS EN 1366. Decision makers should also refer to the fire classification and field of application reports for detailed information. b. orientation in use. a full range of fire resisting ductwork systems.hangers and bearers The specification of all cross joints or longitudinal joints. NOTE that other services must not be supported by the fire tested ductwork system 8. H. The date of the most recent version will be found at the ‘footer’ to every page H. MANUFACTURERS & INSTALLERS General purpose DW /144 ventilation/air conditioning ductwork cannot be utilised as. size and frequency of duct stiffeners The frequency of cross joints The frequency of supports . Further testing may be needed to enable classifications for non-standard applications. The maximum dimensions of the duct cross-section The type.org. the fire resistance period. and required fire resistance The type. for supply or supply & install. and the substrate being fixed to. a fire resisting ductwork system unless the construction / materials of the whole system are proven by test in accordance with the requirements of BS EN 1366.uk/publications where free copy can be downloaded. where any penetration occurs through fire resisting walls or floors. and where the data is provided by a third party product certification scheme accredited or recognised by UKAS. that it is the responsibility of the designer /end user to ensure that the system(s) or products will satisfy the requirements of relevant building legislation This European Edition will also progressively introduce Data Sheets which provide details of duct systems that have been suitably fire tested and classified to EN 13501-3 and/or EN 13501-4 by a European Notified Body. and classified to BS EN 13501 Parts 3 or 4. and to ensure that the published system data pages reflect a valid assessment of the ductwork system as scrutinised by the ASFP Technical Review Panel For the latest version of this publication. visit the ASFP website at www. H. dimensions. as required by the fire test data or assessment.asfp.4 INDEX OF FIRE RESISTING DUCTWORK SYSTEM PAGES Information of ductwork systems from ASFP member companies will be progressively added to the following pages. f. nature and frequency of duct joints The need for stiffeners to the panel and duct system. but to assist initial selection of the suitability of a particular ductwork system to the task in hand.2 CAUTIONARY NOTE TO ALL DUCTWORK DESIGNERS. e. Add fire protection to the duct support systems. to allow simple comparison of products. which have just been created as the objective for all data sheets in the next Edition. This does not suggest that there is full compliance with the all the rules for direct and extended application. The ASFP reserves the right to exclude data which is considered as insufficiently defined or justified. Ensure the use of fixings for hanger systems that are suitable for the applied load. The details of all firestopping seals as fire tested or assessed in conjunction with the ductwork system. Association for Specialist Fire Protection / www. The ASFP review process for this European Edition has taken full cognizance of historical test data for the listed duct systems to enable a judgement that all tabulated entries and claims are reasonable.uk 52 Fire Resisting Ductwork European version 1st Edition 16 Sep 09 . in relation to its geometry.3.