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AS 4254.2-2012

[Pending Revision]

Ductwork for air-handling systems in buildings, Part 2: Rigid duct

Included in Ductwork and air handling systems set
Sets out requirements for materials, construction, and installation, including some aspects of performance, for ductwork for air-handling systems in buildings and facilities, including systems designed in accordance with requirements of AS/NZS 1668.1 and AS 1668.2
Published: 12/11/2012
Pages: 83
Table of contents
Cited references
Content history
Table of contents
About this publication
1 Scope and general
1.1 Scope
1.2 Objective
1.3 Normative references
1.4 Definitions
1.5 General requirements
1.6 Static pressure classification
1.7 Galvanized steel thickness
1.8 Materials testing
1.9 New designs and innovations
2 Duct construction and installation
2.1 Ductwork
2.1.1 General
2.1.2 Rigid ductwork
2.1.3 Kitchen exhaust ductwork
2.2 Duct sealing
2.2.1 General
2.2.2 Kitchen exhaust ductwork sealing
2.2.3 Surface preparation
2.2.4 Air leakage
2.3 Rectangular duct reinforcement
2.3.1 General
2.3.2 Longitudinal seams (LSs) for rectangular ductwork
2.3.3 Notching for longitudinal seams at transverse joints
2.3.4 Tie rods (t)
2.4 Round duct construction
2.5 Oval duct construction
2.6 Hangers and support systems
2.6.1 Straps and rods
2.6.2 Wire rope suspension systems
2.7 Duct liners and insulation
2.7.1 Duct liners
2.7.2 Insulation for rigid ducts
2.7.3 Insulation fixing
3 External equipment installation
3.1 General
3.2 Roof penetrations
3.3 Connection to equipment
3.4 Sealing of external ductwork
4 Functional criteria
4.1 Deflection
4.1.1 Sheet
4.1.2 Reinforcing
4.1.3 Seams
4.1.4 Joints
4.1.5 Beam strength of duct section
4.2 Models for functional standards
Appendix A
A1 Dependent variables
A1.1 Relationships
A1.2 Deflection limits for rectangular duct
Appendix B
Appendix C
Appendix D
Appendix E
Cited references in this standard
[Available Superseded]
The use of ventilation and airconditioning in buildings, Part 1: Fire and smoke control in multi-compartment buildings
Continuous hot-dip metallic coated steel sheet and strip — Coatings of zinc and zinc alloyed with aluminium and magnesium
UL UL 181
Factory-made Air Ducts and Air Connectors
Standard Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet and Strip
Thermal insulation materials for buildings, Part 1: General criteria and technical provisions
Content history
DR AS 4254.2
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