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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Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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Superseded date

06-24-2021

Published date

01-01-1995

Preview

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.

This Standard 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

Under Revision see DR 00102 First published as AS 4254-1995.

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AS 1530.4-1990 Methods for fire tests on building materials, components and structures Fire-resistance tests of elements of building construction
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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
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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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