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Contents
1 Foreword .......................................................................................................................5
2 Introduction....................................................................................................................8
2.1 Primary Objectives .................................................................................................................8
2.2 Smoke Control Methods.........................................................................................................9
2.3 Responsibilities.......................................................................................................................9
3 Scope........................................................................................................................10
4 Terms and Definitions..................................................................................................11
5 Objectives and Performance Criteria...........................................................................13
5.1 General .................................................................................................................................13
5.1.1 The basics of a smoke control system ...................................................................................14
5.2 Objectives .............................................................................................................................15
5.2.1 Commentary.......................................................................................................................15
5.2.2 Recommendations.............................................................................................................16
5.3 Performance Criteria ............................................................................................................17
5.3.1 Introduction........................................................................................................................17
5.3.2 Tenability criteria for means of escape ..............................................................................18
5.3.3 Tenability criteria for fire fighting .....................................................................................19
5.3.4 Travel distance systems to applicable guidance ................................................................21
5.3.5 Extended travel distance systems.......................................................................................23
5.4 Fire and Rescue Service Intervention...................................................................................26
5.5 Documentation .....................................................................................................................28
6 System types...............................................................................................................29
6.1 Commentary ............................................................................................................................29
6.2 Natural Ventilation ...............................................................................................................31
6.3 Pressure differential systems ................................................................................................37
6.3.1 Introduction........................................................................................................................37
6.3.2 General principles .............................................................................................................37
6.3.3 Areas to be pressurised ......................................................................................................38
6.3.4 Supply air system...............................................................................................................39
6.3.5 Pressure control..................................................................................................................39
6.3.6 Accommodation air release (AAR)....................................................................................39
6.3.7 Power supply and controls .................................................................................................40
6.4 Mechanical (Powered) smoke ventilation ...............................................................................40
6.4.1 General principles .............................................................................................................40
6.4.2 Mechanical Extract, Natural Inlet .....................................................................................42
6.4.3 Mechanical Extract, Mechanical Inlet ..............................................................................43
6.4.4 Mechanical Extract only ...................................................................................................44
6.5 Small Single Stair Buildings ................................................................................................46
6.5.1 General principles ..............................................................................................................46
6.5.2 Natural ventilation .............................................................................................................47
6.5.3 Pressurisation .....................................................................................................................48
6.5.4 Mechanical (powered) ventilation .....................................................................................48
7 Interaction with other Fire Protection Systems and other Building Systems................50