Table of Contents
SECTION 1 - SCOPE AND GENERAL
1.1 SCOPE
1.2 NEW DESIGNS AND INNOVATIONS
1.3 APPLICATION
1.4 REFERENCED DOCUMENTS
1.5 DEFINITIONS
1.6 GENERAL REQUIREMENTS
1.7 STATIC PRESSURE CLASSIFICATION
1.8 GALVANIZED STEEL THICKNESS
1.9 TESTING
SECTION 2 - DUCT CONSTRUCTION AND INSTALLATION
2.1 DUCT WORK
2.2 DUCT SEALING
2.3 RECTANGULAR DUCT REINFORCEMENT
2.4 ROUND DUCT CONSTRUCTION
2.5 OVAL DUCT CONSTRUCTION
2.6 HANGERS AND SUPPORT SYSTEMS
2.7 DUCT LINERS AND INSULATION
2.8 FLEXIBLE DUCTWORK
SECTION 3 - EXTERNAL EQUIPMENT INSTALLATION
3.1 GENERAL
3.2 ROOF PENETRATIONS
3.3 CONNECTION TO EQUIPMENT
3.4 SEALING OF EXTERNAL DUCTWORK
SECTION 4 - FUNCTIONAL CRITERIA
4.1 DEFLECTION
4.2 MODELS FOR FUNCTIONAL STANDARDS
APPENDICES
A - PROCEDURE FOR RATING DUCT CONSTRUCTION METHODS
RELATIVE TO THE CONSTRUCTION TABLES
B - 'J' AND 'I' REINFORCEMENTS RELATED TO 'EI' VALUES
C - ALLOWABLE LOADS FOR TRAPEZE ANGLES
D - WEIGHTS AND AREAS OF RECTANGULAR GALVANIZED
STEEL DUCTS
E - WEIGHTS AND AREAS OF CIRCULAR GALVANIZED
STEEL DUCTS
F - FLEXIBLE DUCT REPORT SUMMARY
Abstract
Specifies the requirements for performance, materials, construction and installation of ductwork for air-handling systems in buildings. It applies to ductwork for air-handling systems designed in accordance with the requirements of AS 1668.1 and AS 1668.2.
Scope
This Standard specifies the performance, materials, construction and installation of ductwork for air-handling systems in buildings.
Application
This Standard applies to ductwork for air-handling systems designed in accordance with the requirements of AS 1668.1 and AS 1668.2.
History
First published as AS 4254-1995.
Second edition 2002.