1、BSI Standards PublicationBS 7346-8:2013Components for smokecontrol systemsPart 8: Code of practice forplanning, design, installation,commissioning and maintenancePublishing and copyright informationThe BSI copyright notice displayed in this document indicates when the documentwas last issued. The Br
2、itish Standards Institution 2013Published by BSI Standards Limited 2013ISBN 978 0 580 79709 5ICS 13.220.01; 91.140.30The following BSI references relate to the work on this document:Committee reference FSH/25Draft for comment 13/30266935 DCPublication historyFirst published December 2013Amendments i
3、ssued since publicationDate Text affectedBS 7346-8:2013 BRITISH STANDARDContentsForeword ii0 Introduction 11 Scope 32 Normative references 33 Terms and definitions 44 Documentation and responsibility 75 Determining requirements for a smoke control system 86 Planning and design 87 Installation 238 Co
4、mmissioning, documentation, certification and acceptance 269 Maintenance and servicing 29AnnexesAnnex A (informative) Statutory responsibility for a smoke control system 32Annex B (informative) Model certificates 33Annex C (informative) Model format of system logbook 40Annex D (informative) Location
5、 of roof ventilators in areas potentially subject topositive pressures 42Bibliography 49List of figuresFigure 1 Process for planning, designing, installing, commissioning andmaintaining a smoke control system 2Figure C.1 Sample logbook event recording table 41Figure D.1 Effect of adjacent tall build
6、ings: Section through building withadjacent or adjoining high bay 42Figure D.2 Louvred ventilators installed in the vertical 43Figure D.3 Louvred ventilators installed at an angle greater than 30 44Figure D.4 Single-flap ventilators installed at 0 10 to the horizontal 45Figure D.5 Single-flap, top-h
7、inged units installed at 10 30 abovehorizontal 45Figure D.6 Bottom-hinged, single-flap ventilators 46Figure D.7 Single-flap top-hinged units installed at 10 30 abovehorizontal 47Figure D.8 Examples of types of ventilators probably leading to negativedischarge 48List of tablesTable 1 Fuel storage cap
8、acity 21Table 2 Intervals between pipe supports 24Summary of pagesThis document comprises a front cover, an inside front cover, pages i to ii,pages 1 to 50, an inside back cover and a back cover.BRITISH STANDARD BS 7346-8:2013 The British Standards Institution 2013 iForewordPublishing informationThi
9、s British Standard is published by BSI Standards Limited, under licence fromThe British Standards Institution, and came into effect on 31 December 2013. Itwas prepared by Technical Committee FSH/25, Smoke, heat control systems andcomponents. A list of organizations represented on this committee can
10、beobtained on request to its secretary.Information about this documentAnnex D contains a number of figures reproduced by permission of theFederation of Environmental Trade Associations. Copyright is claimed on thesefigures. Copyright holders are the Federation of Environmental TradeAssociations, 2 W
11、altham Court, Milley Lane, Hare Hatch, Reading, Berkshire,RG10 9TH.Presentational conventionsThe provisions of this standard are presented in roman (i.e. upright) type. Itsrecommendations are expressed in sentences in which the principal auxiliaryverb is “should”.Commentary, explanation and general
12、informative material is presented insmaller italic type, and does not constitute a normative element.The word “should” is used to express recommendations of this standard. Theword “may” is used in the text to express permissibility, e.g. as an alternative tothe primary recommendation of the clause.
13、The word “can” is used to expresspossibility, e.g. a consequence of an action or an event.Notes and commentaries are provided throughout the text of this standard.Notes give references and additional information that are important but do notform part of the recommendations. Commentaries give backgro
14、und information.Use of this documentAs a code of practice, this British Standard takes the form of guidance andrecommendations. It should not be quoted as if it were a specification andparticular care should be taken to ensure that claims of compliance are notmisleading.Any user claiming compliance
15、with this British Standard is expected to be able tojustify any course of action that deviates from its recommendations.Departures from the recommendations of this British Standard are possiblethrough consultation and discussion, and with the agreement of all interestedparties (see 5.2).It has been
16、assumed in the preparation of this British Standard that theexecution of its provisions will be entrusted to appropriately qualified andexperienced people, for whose use it has been produced.Contractual and legal considerationsThis publication does not purport to include all the necessary provisions
17、 of acontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legalobligations.BRITISH STANDARDBS 7346-8:2013ii The British Standards Institution 20130 IntroductionSmoke control systems create and maintain a smoke-free layer above the
18、 floor,or help to reduce smoke and heat build-up, by removing smoke and hot gasesreleased by a fire in the development stage. In doing this, smoke control systemshelp to:a) keep escape and access routes free from smoke;b) facilitate firefighting operations;c) delay and/or prevent flashover and thus
19、full development of the fire;d) protect equipment and furnishings;e) reduce thermal effects on structural components during a fire; andf) reduce damage caused by thermal decomposition products and hot gases.The use of smoke control systems has become widespread. Their value inassisting in the evacua
20、tion of buildings, reducing fire damage and financial lossby preventing smoke logging, facilitating firefighting, reducing rooftemperatures and retarding the lateral spread of fire is firmly established. Forthese benefits to be realized, however, it is essential that smoke control systemsoperate ful
21、ly and reliably whenever called upon to do so during their installedlife.A smoke control system is made up of components that have generally beentested to recognized European and International standards, and needs to beinstalled as part of a properly designed system. The most relevant standardsappli
22、cable to smoke control systems are BS EN 12101 and BS ISO 21927. Typicalsystem implementation involves the selection of appropriate products, suitabledeployment of these products and ensuring they are then interconnected andcontrolled in such a way as to meet the design criteria.The recommendations
23、for the design, planning, installation, commissioning, useand maintenance of a smoke control system are set out in the order given inFigure 1.The first step in the design process is to assess the needs of the building for asmoke control system (see Clause 5). When a decision is taken as to the type
24、andpurpose of the system, the planning and detailed design process begins(Clause 6).The third step is installation, which includes mounting and interconnecting thecomponents (see Clause 7).The fourth step is the commissioning of the system and verification of correctoperation (see Clause 8).Once the
25、 smoke control system is handed over to the relevant responsibleperson, it is important that the system is maintained and serviced to ensure itremains fully operational (Clause 9).The statutory responsibilities for a smoke control systems are set out in Annex A.Annex B provides model certificates fo
26、r the various steps of an installation,while Annex C provides a model format of a system logbook. Annex D containsfigures relating to the location of roof ventilators in areas potentially subject topositive pressures.BRITISH STANDARD BS 7346-8:2013 The British Standards Institution 2013 1Figure 1 Pr
27、ocess for planning, designing, installing, commissioning and maintaining a smoke controlsystemBRITISH STANDARDBS 7346-8:20132 The British Standards Institution 20131 ScopeThis British Standard gives recommendations for the planning, design,installation, commissioning and maintenance of smoke control
28、 systems, includingsmoke clearance, in and around buildings. The recommendations are applicableto systems intended for the protection of life and/or protection of property,including:a) natural smoke ventilation;b) mechanical smoke ventilation;c) smoke barriers;d) smoke and heat exhaust ducts;e) smok
29、e dampers, andtheir controls, power supplies and interconnections.This British Standard is not applicable to non-fire-related functions of smokecontrol systems.This British Standard does not give recommendations as to whether or not toinstall smoke control systems in any given premises.2 Normative r
30、eferencesThe following documents, in whole or in part, are normatively referenced in thisdocument and are indispensable for its application. For dated references, onlythe edition cited applies. For undated references, the latest edition of thereferenced document (including any amendments) applies.BS
31、 5839-1, Fire detection and fire alarm systems for buildings Part 1: Code ofpractice for design, installation, commissioning and maintenanceBS 7346-4:2003, Components for smoke and heat control systems Part 4:Functional recommendations and calculation methods for smoke and heatexhaust ventilation sy
32、stems, employing steady-state design fires Code ofpracticeBS 7346-5, Components for smoke and heat control systems Part 5: Functionalrecommendations and calculation methods for smoke and heat exhaustventilation systems, employing time-dependent design fires Code of practiceBS 7346-7, Components for
33、smoke and heat control systems Part 7: Code ofpractice on functional recommendations and calculation methods for smoke andheat control systems for covered car parksBS 7671, Requirements for electrical installations IET Wiring RegulationsBS 8519:2010, Selection and installation of fire-resistant powe
34、r and control cablesystems for life safety and fire-fighting applications Code of practiceBS 9991, Fire safety in the design, management and use of residentialbuildings Code of practiceBS 9999:2008, Assistive products for persons with disability Classification andterminologyBS EN 1366-3, Fire resist
35、ance tests for service installations Part 3: PenetrationsealsBS EN 12101-1, Smoke and heat control systems Part 1: Specification for smokebarriersBS EN 12101-7, Smoke and heat control systems Part 7: Smoke duct sectionsBS EN 12101-8, Smoke and heat control systems Part 8: Smoke control dampersBRITIS
36、H STANDARD BS 7346-8:2013 The British Standards Institution 2013 3BS EN 12101-10:2005, Smoke and heat control systems Part 10: Power suppliesBS EN 60335-2-103, Household and similar electrical appliances Safety Part 2-103: Particular requirements for drives for gates, doors and windowsBS EN 60947 (a
37、ll parts), Low-voltage switchgear and control gearBS ISO 21927-9, Smoke and heat control systems Part 9: Specification forcontrol equipment3 Terms and definitionsFor the purposes of this British Standard, the following terms and definitionsapply.3.1 access levelone of several states of control equip
38、ment in which selected: controls can be operated; manual operations can be carried out; indications are visible; information can be obtainedSOURCE: BS ISO 21927-93.2 aerodynamic free areageometric area multiplied by coefficient of discharge3.3 air inletdevice connected to outside air to admit air fr
39、om outside the premises3.4 automatic activationinitiation of operation of the smoke control system without manual action3.5 coefficient of dischargeCvratio of actual flow rate, measured under specific conditions, to the theoreticalflow rate through the natural SHEV as defined in Annex B ofBS EN 1210
40、1-2:20033.6 commissioningact of ensuring that all components and the smoke control system are installedand operating as planned3.7 componentcomplete product that is part of the smoke control systemNOTE The principal types of smoke control components are: natural smoke and heat exhaust ventilators; m
41、echanical smoke and heat exhaust ventilators (fans); smoke barriers; smoke control duct sections and ancillaries; smoke control dampers; control equipment; power supplies, including cables; air inlet.BRITISH STANDARDBS 7346-8:20134 The British Standards Institution 20133.8 control equipmentelement c
42、ontaining control and/or release devices, manual and/or automatic,used to operate the smoke control system3.9 fire compartmentenclosed space, comprising one or more separate spaces, bound by elements ofconstruction having a specified fire resistance and intended to prevent thespread of fire (in any
43、direction) for a given period of timeNOTE “Fire compartment” often has regulatory connotations. The term is not to beconfused with 0room of origin0 or 0fire cell0.3.10 fire positionposition of a component to be reached and maintained while the smoke controlsystem is venting smoke and heat3.11 geomet
44、ric areaAvarea of the opening through a ventilator, measured in the plane defined by thesurface of the building, where the surface of the building contacts the structureof the ventilatorNOTE No reduction is made for controls, louvres or other obstructions.3.12 initiation devicedevice, e.g. control p
45、anel, which activates the operating mechanism of acomponent (e.g. a smoke control damper or ventilator) on receipt ofinformation from a fire or smoke detection system or thermal device3.13 manually initiated smoke control systemsmoke control system which is initiated by human actions after the outbr
46、eak offire (e.g. by pressing a button or pulling a handle), leading to a sequence ofautomatic actions that operate the smoke control system3.14 natural ventilationventilation caused by buoyancy forces arising from differences in the density ofgases due to temperature differences3.15 operating timema
47、ximum period between the signal to operate being received by the smokecontrol system and the achievement of the fire position by the smoke zone ofthe component with the most unfavourable route3.16 powered ventilationventilation caused by the positive displacement of gases through a ventilatorNOTE Po
48、wered ventilation is usually provided by fans.3.17 premises managementpersons having day-to-day control of the premises, the fire safety system(s) andimplementation of the fire proceduresNOTE In large premises, management for the fire safety system and associatedmatters is often delegated to a singl
49、e person with specialist knowledge. In smallpremises, a person with specialist knowledge is unlikely to be present, butmanagement of the fire safety system can still be delegated to a specific person.3.18 response timeperiod between the signal to operate being received by a component (e.g. acontrol panel, ventilator or smoke control damper) and the achievement of thecomponents fire positionBRITISH STANDARD BS 7346-8:2013 The British Standards Institution 2013 53.19 secondary power su
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