AS 1668.1-1991

1 - AS 1668.1-1991 THE USE OF MECHANICAL VENTILATION AND AIR-CONDITIONING IN BUILDINGS - FIRE AND SMOKE CONTROL
4 - PREFACE
5 - CONTENTS
7 - SECTION 1 GENERAL
7 - 1.1 SCOPE
7 - 1.2 REFERENCED DOCUMENTS
7 - 1.3 DEFINITIONS
7 - 1.3.1 Shall
7 - 1.3.2 May
7 - 1.3.3 Air
8 - 1.3.4 Air-handling plant
8 - 1.3.5 Air-handling system
8 - 1.3.6 Air-pressurization system
8 - 1.3.7 Approved and approval
8 - 1.3.8 Central air-handl ing system
8 - 1.3.9 Combustible
8 - 1.3.10 Compartment
8 - 1.3.11 Downstream
8 - 1.3.12 Duct
8 - 1.3.13 Economy cycle
8 - 1.3.14 Fail-safe
8 - 1.3.15 Fire alarm
8 - 1.3.16 Fire damper
8 - 1.3.17 Fire-isolated
8 - 1.3.18 Fire-isolated escape route
8 - 1.3.19 Fire resistance level (FRL)
8 - 1.3.20 Fire-resisting
8 - 1.3.21 Flexible connection
8 - 1.3.22 Incinerette
8 - 1.3.23 Individual air-handling system
8 - 1.3.24 Kitchen exhaust hood
8 - 1.3.25 Masonry
8 - 1.3.26 Plenum
8 - 1.3.27 Purging smoke control
8 - 1.3.28 Regulatory authority
9 - 1.3.29 Required
9 - 1.3.30 Shaft
9 - 1.3.31 Smoke spill
9 - 1.3.32 Smoke-spill system
9 - 1.3.33 Subduct
9 - 1.3.34 Toilet exhaust system
9 - 1.3.35 Upstream
9 - 1.3.36 Zone smoke control
10 - SECTION 2 GENERAL REQUIREMENTS
10 - 2.1 SCOPE AND APPLICATION
10 - 2.2 DUCTWORK
10 - 2.2.1 Early fire-hazard properties
10 - 2.2.2 Combustibility and temperature of fusion
10 - 2.2.3 Fire resistance
10 - 2.2.4 Duct installation, general
10 - 2.2.5 Unencased insulation of ducts
10 - 2.3 PLENUMS
10 - 2.4 FLEXIBLE CONNECTIONS
10 - 2.5 FIRE DAMPERS
10 - 2.6 SPACING FROM FIRE DAMPERS
10 - 2.7 AIR-HANDLING PLANT CASINGS
10 - 2.8 AIR FILTERS
10 - 2.8.1 Location of air filters in relation to openings
11 - 2.8.2 Liquid adhesive coatings
11 - 2.8.3 Screens for filters
11 - 2.9 ELECTRIC HEATERS
11 - 2.9.1 General
11 - 2.9.2 Integrity
11 - 2.9.3 Surface temperature
11 - 2.9.4 Thermal insulation
11 - 2.9.5 Interlocking of power supply
11 - 2.9.6 High-temperature-limiting thermostat
11 - 2.9.7 Air-supply-failure sensor
11 - 2.10 ELECTRICAL INSTALLATION
11 - 2.11 AIR-HANDLING SYSTEMS SHUTDOWN
11 - 2.11.1 General
11 - 2.11.2 Small/special purpose systems
11 - 2.11.3 Central air-handling systems
12 - SECTION 3 OPENINGS IN FIRE-RESISTING CONSTRUCTION
12 - 3.1 APPLICATION
12 - 3.2 GENERAL
12 - 3.2.1 Performance requirements
12 - 3.2.2 Packing
12 - 3.3 OPENINGS IN WALLS
12 - 3.4 OPENINGS IN FLOORS
12 - 3.4.1 Shafts
12 - 3.4.2 Fire dampers
12 - 3.5 FIRE-RESISTANT FLOOR/CEILING AND ROOF/CEILING STRUCTURES
12 - 3.5.1 Openings in suspended ceilings
12 - 3.5.2 Variations from prototype
13 - SECTION 4 SMOKE CONTROL
13 - 4.1 GENERAL
13 - 4.2 SCOPE
13 - 4.3 APPLICATION
13 - 4.4 OBJECTIVES
13 - 4.5 EXTERNAL OPENINGS FOR AIR INTAKE AND SMOKE SPILL
13 - 4.5.1 Location of openings for air intake and outlets
13 - 4.5.2 Discharge at various levels
13 - 4.6 DIRECTION OF SPILL AIR FLOW UNDER SMOKE-CONTROL CONDITIONS
13 - 4.7 LOCATION OF SMOKE-SPILL AIR INLETS
13 - 4.8 HEAT EXCHANGE EQUIPMENT
13 - 4.9 AIR-CONTROL DAMPERS
13 - 4.9.1 General
13 - 4.9.2 High-temperature operation
13 - 4.10 NOISE
13 - 4.11 FIRE-ISOLATED EXITS
13 - 4.12 FIRE DOORS–PRESSURE DIFFERENTIALS
13 - 4.13 SMOKE-SPILL FAN
14 - 4.14 DUCTWORK IN SMOKE-SPILL SYSTEMS
14 - 4.15 AUTOMATIC SMOKE DETECTORS
14 - 4.15.1 Type
14 - 4.15.2 Location
14 - 4.15.3 Monitoring equipment
14 - 4.15.4 Monitoring period
14 - 4.15.5 Alarm zones
14 - 4.15.6 Supply air smoke detector
14 - 4.15.7 Installation
14 - 4.16 ELECTRICAL INSTALLATION
14 - 4.16.1 Equipment
14 - 4.16.2 Wiring
15 - 4.16.3 Isolation switches
15 - 4.17 CONTROL AND INDICATION
15 - 4.17.1 Fire fans control panel (FFCP)
15 - 4.17.2 Controls
15 - 4.17.3 Indicators
15 - 4.17.4 Notices and labels
15 - 4.18 OPERATING INSTRUCTIONS
15 - 4.18.1 Instructions
15 - 4.18.2 Diagram
15 - 4.19 TESTING
15 - 4.19.1 General
15 - 4.19.2 Objective
15 - 4.19.3 Component testing
16 - 4.19.4 Measurement
16 - 4.20 NOISE
16 - 4.21 TEST SCHEDULE
16 - 4.22 TEST RESULTS
17 - SECTION 5 CENTRAL AIR-HANDLING SYSTEMS
17 - 5.1 APPLICATION
17 - 5.2 GENERAL
17 - 5.3 FIRE ISOLATION
17 - 5.3.1 Smoke-spill system
17 - 5.3.2 Ducts within other compartments
17 - 5.3.3 Smoke-spill shafts
17 - 5.3.4 Entry of air into the smoke-spill system
17 - 5.4 FIRE DAMPERS
17 - 5.5 SUBDUCTS
17 - 5.5.1 Manufacture
17 - 5.5.2 Outlet projection
17 - 5.5.3 Installation
18 - 5.6 ALTERNATIVE DESIGN
18 - 5.7 PURGING ARRANGEMENT
18 - 5.7.1 General
18 - 5.7.2 Smoke-spill fan
18 - 5.7.3 Return air fan
18 - 5.7.4 Supply air fan
18 - 5.7.5 Air-control damper
18 - 5.7.6 Fire damper
18 - 5.7.7 Operation under fire conditions
19 - 5.8 ZONE SMOKE CONTROL
19 - 5.8.1 General
19 - 5.8.2 Performance criteria
19 - 5.8.3 Basic requirements
19 - 5.8.4 Smoke-spill fan
19 - 5.8.5 Supply air fan
19 - 5.8.6 Air-control dampers
19 - 5.8.7 Air relief and make-up
19 - 5.8.8 Operation under fire conditions
21 - SECTION 6 INDIVIDUAL AIR-HANDLING PLANTS-ZONE SMOKE CONTROL SYSTEM
21 - 6.1 APPLICATION
21 - 6.2 GENERAL
21 - 6.3 ALTERNATIVE DESIGN
21 - 6.4 PERFORMANCE CRITERIA
21 - 6.5 COMPONENTS WITHIN OTHER COMPARTMENTS
21 - 6.6 SMOKE-SPILL FANS
21 - 6.7 RETURN AIR SPILL AIR FANS
21 - 6.8 SPILL AIR RELIEF
21 - 6.9 SUPPLY AIR FAN
21 - 6.10 AIR-CONTROL DAMPERS
21 - 6.11 AIR RELIEF AND MAKE-UP
21 - 6.12 OPERATION IN THE EVENT OF FIRE
21 - 6.13 INDIVIDUAL AIR-HANDLING PLANTS INCORPORATING COMMON OUTDOOR AIR AND COMMON SPILL AIR SHAFTS
21 - 6.13.1 General
22 - 6.13.2 Smoke-spill fan
22 - 6.13.3 Supply air fan
22 - 6.13.4 Fire isolation
22 - 6.13.5 Fire dampers
22 - 6.13.6 Subducts
23 - SECTION 7 MISCELLANEOUS AIR-HANDLING SYSTEMS
23 - 7.1 APPLICATION
23 - 7.2 OBJECTIVES
23 - 7.3 GENERAL
23 - 7.4 EXHAUST SYSTEMS
23 - 7.4.1 Minor exhaust systems
23 - 7.4.2 Major exhaust systems
23 - 7.5 KITCHEN HOOD EXHAUST SYSTEMS
23 - 7.5.1 General
23 - 7.5.2 Common exhaust
23 - 7.5.3 Ductwork
23 - 7.5.4 Plant isolation
23 - 7.5.5 Fire dampers
24 - 7.5.6 Operation under fire conditions
24 - 7.6 CAR PARK VENTILATION SYSTEMS
24 - 7.6.1 General
24 - 7.6.2 Fire isolation
24 - 7.6.3 Control
24 - 7.6.4 Smoke detectors
24 - 7.6.5 Operation
24 - 7.7 SUPPLY AIR SYSTEMS
24 - 7.7.1 Minor supply air systems
24 - 7.7.2 Major supply air systems
25 - SECTION 8 AIR PRESSURIZATION SYSTEMS FOR FIRE-ISOLATED EXITS
25 - 8.1 GENERAL
25 - 8.2 SCOPE
25 - 8.3 OBJECTIVE
25 - 8.4 DEEMED-TO-COMPLY SYSTEM
25 - 8.4.1 General
25 - 8.4.2 Performance criteria
26 - 8.4.3 Air pressurization fans
26 - 8.4.4 Pressure relief
26 - 8.4.5 Automatic smoke detectors
26 - 8.4.6 Electrical installation
26 - 8.4.7 Control and indication
26 - 8.4.8 Operation under fire conditions
26 - 8.4.9 Testing
26 - 8.5 ALTERNATIVE DESIGN
27 - APPENDIX A - STAIR PRESSURIZATION COMMISSIONING TESTS
27 - A1 GENERAL
27 - A2 PROCEDURES
27 - A3 PURGE SYSTEMS
27 - A4 ZONE SYSTEMS
27 - A5 RESTORATION TIME PERFORMANCE
28 - A6 NOISE LEVEL MEASUREMENTS
28 - A7 MEASUREMENT OF DOOR OPENING FORCE
28 - A8 MEASUREMENT OF AIR VELOCITY THROUGH A DOORWAY
28 - A8.1 Time average method
28 - A8.2 Instantaneous readout average method
30 - APPENDIX B - COMMENTARY TO SECTIONS 3 TO 8
30 - SECTION 3 OPENINGS IN FIRE-RESISTING CONSTRUCTION
31 - SECTION 4 SMOKE CONTROL
31 - C4.2 SCOPE
31 - C4.3 APPLICATION
31 - C4.4 OBJECTIVES
31 - C4.5 EXTERNAL OPENINGS FOR AIR INTAKE AND SMOKE SPILL
31 - C4.5.1 Location of openings for air intake and outlets
31 - C4.5.2 Discharge at various levels
32 - C4.6 DIRECTION OF SPILL AIR FLOW UNDER SMOKE CONTROL CONDITIONS
32 - C4.7 LOCATION OF SMOKE-SPILL AIR INLETS
32 - C4.9 AIR-CONTROL DAMPERS
32 - C4.10 NOISE
32 - C4.11 FIRE-ISOLATED EXITS
32 - C4.12 FIRE DOORS–PRESSURE DIFFERENTIALS
32 - C4.13 SMOKE-SPILL FAN
33 - C4.15 AUTOMATIC SMOKE DETECTORS
33 - C4.15.1 Type
33 - C4.15.2 Location
33 - C4.15.4 Monitoring period
33 - C4.15.5 Alarm zones
33 - C4.15.6 Supply air smoke detector
33 - C4.16 ELECTRICAL INSTALLATION
33 - C4.16.1 Equipment
33 - C4.16.2 Wiring
33 - C4.17 CONTROL AND INDICATION
33 - C4.18 OPERATING INSTRUCTIONS
34 - C4.19 TESTING
34 - C4.19.1 General
35 - SECTION 5 CENTRAL AIR-HANDLING SYSTEMS
35 - C5.3 FIRE ISOLATION
35 - C5.3.1 Smoke-spill system
35 - C5.3.2 Ducts within other compartments
35 - C5.3.3 Smoke-spill shafts
35 - C5.3.4 Entry of air into the smoke-spill system
35 - C5.4 FIRE DAMPERS
35 - C5.5 SUBDUCTS
35 - C5.7 PURGING ARRANGEMENT
36 - C5.7.2 Smoke-spill fans
36 - C5.7.4 Supply air fan
36 - C5.7.5 Air-control damper
36 - C5.7.7 Operation under fire conditions
36 - C5.8 ZONE SMOKE CONTROL
36 - C5.8.2 Performance criteria
37 - C5.8.4 Smoke-spill fan
37 - C5.8.7 Air relief and make-up
37 - C5.8.8 Operation under fire condi tions
38 - SECTION 6 INDIVIDUAL AIR-HANDLING PLANTS-ZONE SMOKE CONTROL SYSTEMS
38 - C6.4 PERFORMANCE CRITERIA
38 - C6.5 COMPONENTS WITHIN OTHER COMPARTMENTS
38 - C6.6 SMOKE-SPILL FANS
38 - C6.8 SPILL AIR RELIEF
38 - C6.9 SUPPLY AIR FAN
38 - C6.10 AIR-CONTROL DAMPER
38 - C6.11 AIR RELIEF AND MAKE-UP
38 - C6.12 OPERATION IN THE EVENT OF FIRE
38 - C6.13 INDIVIDUAL AIR-HANDLING PLANTS INCORPORATING COMMON OUTDOOR AIR AND COMMON SPILL AIR SHAFTS
40 - SECTION 7 MISCELLANEOUS AIR-HANDLING SYSTEMS
40 - C7.4 EXHAUST SYSTEMS
40 - C7.5 KITCHEN HOOD EXHAUST SYSTEMS
40 - C7.6 CAR PARK VENTILATION SYSTEMS
40 - C7.7 SUPPLY AIR SYSTEMS
41 - SECTION 8 AIR PRESSURIZATION SYSTEMS FOR FIRE-ISOLATED EXITS

Sets out the requirements for those aspects of design, construction, installation and operation of air-handling systems with a view to minimizing the spread of smoke and fire through buildings by way of the air-handling systems.

This Section sets out the documents referred to in this Standard, and the definitions that shall apply to this document.

Available SupersededUnder Revision See DR 96503 First published in part as AS 1668.1-1974.Second edition 1979.MP 47.C1 first published 1980.AS 1668.1-1979 and MP 47.C1-1980 revised and amalgamated as AS 1668.1-1991. First published in part as AS 1668.1-1974. Second edition 1979. MP 47.C1 first published 1980. AS 1668.1-1979 and MP 47.C1-1980 revised and amalgamated as AS 1668.1-1991.