BS7346-7:2006 BRITISHSTANDARD Components for smoke and heat control systems IS8 Part7:Codeofpracticeonfunctional remendationsandcalculationmethods Uncontrolled Copy for smoke and heat control systems for covered car parks 13/09/2010 BSi BritishStandards
BS 7346-7:2006 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Publishing and copyright information The BSI copyright notice displayed in this document indicates when the document was last issued. BSI 2006 ISBN 0 580 49087 4 The following BSl references relate to the work on this standard: Committee reference FSH/25/4 Draft for ment 06/30112774 DC Publication history First published October 2006 Amendments issued since publication Amd. no. Date Text affected IS8 13/09/2010 Licensed
BS 7346-7:2006 Contents Foreword i o Introduction 1 1 Scope 3 2 Normative references 4 3 Terms and definitions 5 4 Smoke and heat control system selection 10 5 Design fires 11 6 Vehicle exhaust pollution control13 7 Natural dispersal smoke ventilation 14 8 Conventional mechanical extract 16 9 Impulse ventilation to achieve smoke clearance 18 10 Impulse ventilation to assist fire-fighting access 20 11 Impulse ventilation to protect means of escape 24 12 Smoke and heat exhaust ventilation systems (SHEVS) 25 13 Ductwork fixings and smoke dampers 26 14 Controls and power supplies 27 IS8 15 Pre-installation verification 30 16 Interaction with other fire protection systems and other building systems 31 17 Commissioning 33 Copy 18 Documentation to be supplied with heat and smoke control system 35 Uncontrolled 19 Maintenance and safety 37 Annexes Annex A (informative) Computer-based models 38 Annex B (informative) Lighting signage public address and voice alarm systems 39 Bibliography 40 List of figures Figure 1 Typical mechanical ventilation using a ducted smoke dispersal 13/09/2010 system 15 Figure 2 - Typical mechanical ventilation using an impulse smoke dispersal system 17 Figure 3 - Typical mechanical ventilation using an impulse system for fire- fighter access 21 Figure 4 - Design regions for a single volume space 26 List of tables Table 1 - Steady-state design fires 12 Macdonald Table 2 - Checklist for missioning of major ponents of a smoke and heat control system or SHEVS 34 copy:Mott Summary of pages This document prises a front cover an inside front cover pages and icensed i pages 1 to 40 an inside back cover and a back cover. BSI 2006
BS 7346-7:2006 Foreword Publishing information This part of BS 7346 was published by BSI and came into effect on 31 October 2006. It was prepared by Submittee FSH/25/4 Smoke control systems - lmpulse fons for cor porks and similar under the authority of Technical Committee FSH/25 Smoke heat controf systems ond ponents. A list of organizations represented on this mittee can be obtained on request to its secretary. Use of this document As a code of practice this part of BS 7346 takes the form of guidance and remendlations. It should not be quoted as if it were a specification and particular care should be taken to ensure that claims of pliance are not misleading. Any user claiming pliance with this part of BS 7346 is expected to be able to justify any course of action that deviates from its remendations. IS8 Presentationalconventions The provisions in this standard are presented in roman (i.e. upright) type. Its remendations are expressed in sentences in which the principal auxiliary Copy verb is *"should*" Commentary explanation and general informative moterial is presented in smaller italic type and does not constitute o normative element. Uncontrolled Contractual and legal considerations This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. 13/09/2010 Macdonald copy:Mott Licensed ii *D BSI 2006
BS 7346-7:2006 Introduction 0.1 Background tosmokecontrolincarparks Ventilation of covered car parks is usually remended in order to limit concentrations of carbon monoxide (CO) and other vehicle emissions in the day to day use of car parks and to remove smoke and heat in the event of a fire. The same equipment is often used to satisfy both requirements. This standard recognising the dual use of systems also provides guidance on usage for vehicle emission ventilation. There is no requirement in the Building Regulations 20o0 [1] Building (Scotland) Regulations [2] Building Regulations (Northern Ireland) [3] for sprinkler systems to be provided in car parks although there are requirements in some local acts. The remendations in this standard are provided for smoke and heat control systems installed in car parks with or without sprinkler protection. The main benefit of sprinklers is to control the size of fire to be dealt with by the fire and rescue service. This is reflected in the design fire sizes remended for car parks with and without sprinklers. IS8 Modern cars are generally larger than their predecessors and contain a larger quantity of flammable materials in particular plastics. This has led to a review of the heat output from burning cars and the risk of fire spread Copy between cars. As a result the design fires remended in this standard are larger and have a greater heat output than those in some previous guidance. Uncontrolled Car park ventilation systems can be designed for one or more of three purposes in the event of a fire: 1) to assist fire-fighters to clear smoke from a car park during and after a fire; 2) to provide clear smoke-free access for fire-fighters to a point close to the seat of the fire; 13/09/2010 3) to protect means of escape from the car park. The system requirements will differ depending upon the purpose. Not all sasodnd le jo alqens ae sasas uoean jo sad Remendations and criteria are provided for the design of systems for all three purposes. a)To assist fire-fighters to cleor smoke from a car pork during and after Ltd a fire. Smoke clearance systems are intended to assist fire-fighters by copy:Mott Macdonald providing ventilation to allow speedier clearance of the smoke once the fire has been extinguished. The ventilation might also help reduce smoke density and temperature during the course of a fire. e jo eae Aue ueuje o papuau Aegoads jou ane sass asa car park clear of smoke to limit smoke density or temperature to within any limits or to assist means of escape. It is possible that some smoke clearance systems could actually worsen conditions for means of escape if set in operation too early by encouraging smoke circulation and descent of the smoke layer. For this reason it might be preferable to either delay operation after automatic Licensed actuation or to provide only manual actuation from a fire service override switch. BSI 2006** 1
BS 7346 7 2006 烟气和热量控制系统的组件 第7部分 有盖停车场烟热控制系统功能建议和计算方法标准.pdf
