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AS
AS 4254-1995

AS 4254-1995

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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Ductwork for air-handling systems in buildings

Available format(s)

Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users

Superseded date

29-05-2024

Superseded by

AS 4254-2002

Published date

01-01-1995

Publisher

Standards Australia

Preview
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Hardcopy - English
PDF 1 User - English
PDF 3 Users - English
PDF 5 Users - English
PDF 9 Users - English
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1 - AS 4254-1995 DUCTWORK FOR AIR-HANDLING SYSTEMS IN BUILDINGS
4 - PREFACE
5 - CONTENTS
6 - SECTION 1 SCOPE AND GENERAL
6 - 1.1 SCOPE
6 - 1.2 NEW DESIGNS AND INNOVATIONS
6 - 1.3 APPLICATION
6 - 1.4 REFERENCED DOCUMENTS
7 - 1.5 DEFINITIONS
7 - 1.5.1 Airflow rate (herein referred to as flow rate)
7 - 1.5.2 Air-handling plant
7 - 1.5.3 Air-handling system
7 - 1.5.4 Air-pressurization system
7 - 1.5.5 Air outlet
7 - 1.5.6 Approved and approval
7 - 1.5.7 Combustible
7 - 1.5.8 Compartment
7 - 1.5.9 Downstream
7 - 1.5.10 Duct
7 - 1.5.11 Duct liner
7 - 1.5.12 Exhaust air
7 - 1.5.13 Exhaust air intake
7 - 1.5.14 Exhaust outlet
7 - 1.5.15 Facing material
7 - 1.5.16 Fail-safe
7 - 1.5.17 Fire alarm
7 - 1.5.18 Fire damper
7 - 1.5.19 Fire-isolated
7 - 1.5.20 Fire resistance level (FRL)
8 - 1.5.21 Fire-resisting
8 - 1.5.22 Flexible connection
8 - 1.5.23 Flexible duct
8 - 1.5.24 Hood
8 - 1.5.25 Infiltration air
8 - 1.5.26 Insulated flexible duct
8 - 1.5.27 Insulation
8 - 1.5.28 Jacket/sleeve
8 - 1.5.29 Joint
8 - 1.5.30 Leakage air
8 - 1.5.31 May
8 - 1.5.32 Objectionable effluent
8 - 1.5.33 Outdoor air
8 - 1.5.34 Outdoor air intake
8 - 1.5.35 Plant room
8 - 1.5.36 Plenum
8 - 1.5.37 Recycled air
8 - 1.5.38 Regulatory authority
8 - 1.5.39 Relief air
8 - 1.5.40 Required
8 - 1.5.41 Return air
8 - 1.5.42 Seam
8 - 1.5.43 Shall
9 - 1.5.44 Should
9 - 1.5.45 Spill air
9 - 1.5.46 Supply air
9 - 1.5.47 Upstream
9 - 1.6 GENERAL REQUIREMENTS
9 - 1.7 STATIC PRESSURE CLASSIFICATION
10 - 1. 8 GALVANIZED STEEL THICKNESS
10 - 1. 9 TESTING
11 - SECTION 2 DUCT CONSTRUCTION AND INSTALLATION
11 - 2.1 DUCT WORK
11 - 2.1.1 General
11 - 2.1.2 Kitchen exhaust ductwork
11 - 2.2 DUCT SEALING
11 - 2.2.1 General
13 - 2.2.2 Kitchen exhaust ductwork sealing
13 - 2.2.3 Sealing media
13 - 2.2.4 Surface preparation
13 - 2.2.5 Leakage
14 - 2.3 RECTANGULAR DUCT REINFORCEMENT
14 - 2.3.1 General
15 - 2.3.2 Longitudinal seams for rectangular duct (LS)
15 - 2.3.3 Tie rods (t)
48 - 2.4 ROUND DUCT CONSTRUCTION
56 - 2.5 OVAL DUCT CONSTRUCTION
58 - 2.6 HANGERS AND SUPPORT SYSTEMS
66 - 2.7 DUCT LINERS AND INSULATION
66 - 2.7.1 Duct liners
68 - 2.7.2 Insulation for rigid ducts
68 - 2. 8 FLEXIBLE DUCTWORK
68 - 2.8.1 Construction
68 - 2.8.2 Compliance with test criteria
70 - 2.8.3 Fire performance
70 - 2.8.4 Installation
70 - 2.8.5 Hangers and support systems
71 - 2.8.6 Insulation of flexible ductwork
74 - SECTION 3 EXTERNAL EQUIPMENT INSTALLATION
74 - 3.1 GENERAL
74 - 3.2 ROOF PENETRATIONS
74 - 3.3 CONNECTION TO EQUIPMENT
74 - 3.4 SEALING OF EXTERNAL DUCTWORK
79 - SECTION 4 FUNCTIONAL CRITERIA
79 - 4.1 DEFLECTION
79 - 4.1.1 Sheet
79 - 4.1.2 Reinforcing
79 - 4.1.3 Seams
79 - 4.1.4 Joints
79 - 4.1.5 Beam strength of duct section
79 - 4.2 MODELS FOR FUNCTIONAL STANDARDS
81 - APPENDIX A - PROCEDURE FOR RATING DUCT CONSTRUCTION METHODS RELATIVE TO THE CONSTRUCTION TABLES
81 - A1 PROCEDURES
82 - A2 DEPENDENT VARIABLES
82 - A2.1 Relationships
82 - A2.2 Deflection limits for rectangular duct
83 - APPENDIX B - `J' AND `I' REINFORCEMENT RELATED TO `EI' VALUES
84 - APPENDIX C - ALLOWABLE LOADS FOR TRAPEZE ANGLES
86 - APPENDIX D - CIRCULAR EQUIVALENT OF RECTANGULAR DUCTS
87 - APPENDIX E - WEIGHTS AND AREAS OF RECTANGULAR GALVANIZED STEEL DUCTS
88 - APPENDIX F - WEIGHTS AND AREAS OF CIRCULAR GALVANIZED STEEL DUCTS

Specifies the performance, materials, construction and installation of ductwork for air handling systems in buildings.

Committee
ME-062
DocumentType
Standard
ISBN
0 7262 9341 5
Pages
83
PublisherName
Standards Australia
Status
Superseded
SupersededBy
Supersedes

This Standard specifies the performance, materials, construction and installation of ductwork for air-handling systems in buildings.

First published as AS 4254-1995.

AS 1734-1986 Aluminium and aluminium alloys - Flat sheet, coiled sheet and plate
AS 1397-1993 Steel sheet and strip - Hot-dipped zinc-coated or aluminium/zinc-coated
AS 1668.2-1991 The use of mechanical ventilation and air-conditioning in buildings Mechanical ventilation for acceptable indoor-air quality
AS 1682.2-1990 Fire Dampers Installation
AS 1866-1986 Aluminium and aluminium alloys - Extruded rod, bar, solid and hollow shapes
AS 1599-1988 Pressure sensitive adhesive packaging tapes
AS 1449-1994 Wrought alloy steels - Stainless and heat-resisting steel plate, sheet and strip
AS 1530.4-1990 Methods for fire tests on building materials, components and structures Fire-resistance tests of elements of building construction
AS 1903 TO 1904-1976 Reflective foil laminate
AS 3666-1989 Air-handling and water systems of buildings - Microbial control
AS 3679.1-1990 Structural steel - Hot-rolled bars and sections
AS 1530.1-1994 Methods for fire tests on building materials, components and structures Combustibility test for materials (Reconfirmed 2016)
AS 2338-1980 Preferred dimensions of wrought metal products
AS 1530.2-1993 Methods for fire tests on building materials, components and structures Test for flammability of materials (Reconfirmed 2016)
AS 1668.1-1991 The use of mechanical ventilation and air-conditioning in buildings - Fire and smoke control
AS 1530.3-1989 Methods for fire tests on building materials, components and structures Simultaneous determination of ignitability, flame propagation, heat release and smoke release

AS 4426-1997 Thermal insulation of pipework, ductwork and equipment - Selection, installation and finish (Reconfirmed 2018)
AS/NZS 1668.1:1998 The use of ventilation and airconditioning in buildings Fire and smoke control in multi-compartment buildings
SAA/SNZ HB32:1995 Control of microbial growth in air-handling and water systems in buildings (Reconfirmed 2016)
AS/NZS 3666.1:1995 Air-handling and water systems of buildings - Microbial control Design, installation and commissioning

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