AS/NZS 2785:2020
Suspended ceilings - Design and installation
Standard sets out the minimum requirements for the design, construction, installation, maintenance, and testing of internal and external non-trafficable suspended ceiling systems of dry construction with suspension systems attached to a supporting structure. It is intended for use in commercial and industrial applications. This Standard also applies to domestic structures designed in accordance with AS 1170.4 in Australia. This Standard is based on limit states philosophy and covers aspects of the design and performance requirements, installation, workmanship, maintenance, and testing of suspended ceiling systems.
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AS/NZS 2785:2020 Suspended ceilings - Design and installation
Preface
Introduction
Section 1 Scope and general
1.1 Scope
1.2 Normative references
1.3 Terms and definitions
1.4 Notation
Section 2 Design requirements
2.1 Design
2.1.1 Aim
2.1.2 Requirements
2.1.3 General design considerations
2.1.4 Ductility
2.2 Actions
2.2.1 General
2.2.2 Requirements
2.2.3 Other actions
2.3 Ultimate limit state
2.3.1 General
2.3.2 Design criteria
2.3.3 Combinations of actions for ultimate limit state
2.3.4 Fasteners and hangers
2.3.5 Wind actions and internal pressures
2.3.6 Earthquake
2.4 Serviceability limit state
2.4.1 General
2.4.2 Method
2.4.3 Combinations of actions for serviceability limit state
2.4.4 Serviceability inter-storey drift deflections
2.4.5 Deflection limits
2.5 Fire reaction and resistance
2.5.1 General
2.5.2 Method
2.6 Acoustic requirements
2.6.1 General
2.6.2 Method
2.6.3 Laboratory versus field measurements
2.7 Ceiling movement considerations
2.7.1 General
2.7.2 Thermal
2.7.3 Hygroscopic
2.8 Durability (for New Zealand only)
Section 3 Construction, installation and maintenance
3.1 Pre-construction
3.2 Site conditions and installation
3.2.1 Site conditions
3.2.2 Installation
3.3 Setting out
3.4 Ceiling systems
3.5 Top fasteners
3.5.1 General
3.5.2 Fixing into concrete
3.5.3 Fixing into steel
3.6 Hangers, struts and ties
3.7 Partitions
3.8 Bulkheads and upstands
3.9 Tiles and infill panels
3.10 Luminaires
3.11 Finish
3.12 Joints
3.12.1 General
3.12.2 Control joints
3.12.3 Building movement joints
3.13 Protection of installed ceiling
3.14 Inspection of installed ceiling
3.15 Maintenance
Section 4 Detailing, ceiling restraint and services interaction
4.1 Ceiling layout
4.2 Services and other attachments
4.2.1 General
4.2.2 Services including air conditioning and ventilation
4.2.3 Electrical services
4.2.4 Sprinklers
4.2.5 Other
4.3 Seismic restraint of the ceiling
4.3.1 General
4.3.2 Joint types
4.3.3 Seismic restraint types
4.4 Ceiling and services interaction
Section 5 Materials
5.1 General
5.2 Aluminium
5.3 Copper
5.4 Zinc-coated and aluminium/zinc-coated steel
5.5 Steel sections
5.6 Stainless steel
5.7 Timber
5.8 Protective coatings
5.9 Paints
5.9.1 Paint for metal protection
5.9.2 Paint for protection and decoration
5.9.3 Pre-painted post-formed metal sections
5.9.4 Finishes
5.10 Powder coated sections
5.10.1 Aluminium substrate
5.10.2 Metal substrate other than aluminium
5.11 Colour and texture
5.11.1 General
5.11.2 Colour texture and gloss
5.12 Adhesion and resilience
Section 6 Testing
6.1 Testing methods
6.1.1 General
6.1.2 Sub-assemblies
6.1.3 Grid ceiling systems
6.1.4 Other ceiling grid systems
6.2 Testing
6.2.1 Testing for material properties
6.2.2 Testing for determining section or member properties
6.2.3 Testing of connections
6.2.4 Dynamic testing
6.3 Testing protocol
6.3.1 Test specimen
6.3.2 Number of tests
6.3.3 Pre-loading test samples
6.3.4 Criteria for acceptance
6.3.5 Determination of design capacities
6.3.6 Reporting of results
6.4 Fire reaction and resistance
6.4.1 Testing for early fire hazard properties
6.4.2 Testing for resistance to fire
6.4.3 Testing for flammability (Australia only)
6.4.4 Test method reporting
6.5 Acoustic testing
6.5.1 Sound absorption
6.5.2 Airborne sound insulation
6.5.3 Impact sound insulation
6.5.4 Test method reporting
6.6 Alternative test methods
Appendix A (normative) Bulkheads
Appendix B (informative) Design and tender
Appendix C (informative) Site conditions, installation and inspection
Appendix D (informative) Setting out and levelling
Appendix E (informative) Installation of external ceilings
Appendix F (informative) Material selection and performance — Australia only
Appendix G (informative) Fasteners
Appendix H (informative) Hangers and struts
Appendix I (informative) Ceiling grid systems
Appendix J (informative) Tiles and infill panels
Appendix K (informative) Partitions
Bibliography
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References
Acoustics - Measurements of sound insulation in buildings and of buildings elements - Laboratory measurement of room-to-room airborne sound insulation of a suspended ceiling with a plenum above it
Gypsum linings - Application and finishing
Prefinished/prepainted sheet metal products for interior/exterior building applications - Performance requirements
Related Information
Similar Standards
-
AS/NZS 2499:2000
Acoustics - Measurements of sound insulation in buildings and of buildings elements - Laboratory measurement of room-to-room airborne sound insulation of a suspended ceiling with a plenum above it
-
AS/NZS 3661.2:1994
Slip resistance of pedestrian surfaces - Part 2: Guide to the reduction of slip hazards -
AS/NZS 4586:2004
Slip resistance classification of new pedestrian surface materials
-
AS/NZS 4586:2004 A1
Slip resistance classification of new pedestrian surface materials: Amendment 1
AS/NZS 2785:2020 Suspended ceilings - Design and installation
Preface
Introduction
Section 1 Scope and general
1.1 Scope
1.2 Normative references
1.3 Terms and definitions
1.4 Notation
Section 2 Design requirements
2.1 Design
2.1.1 Aim
2.1.2 Requirements
2.1.3 General design considerations
2.1.4 Ductility
2.2 Actions
2.2.1 General
2.2.2 Requirements
2.2.3 Other actions
2.3 Ultimate limit state
2.3.1 General
2.3.2 Design criteria
2.3.3 Combinations of actions for ultimate limit state
2.3.4 Fasteners and hangers
2.3.5 Wind actions and internal pressures
2.3.6 Earthquake
2.4 Serviceability limit state
2.4.1 General
2.4.2 Method
2.4.3 Combinations of actions for serviceability limit state
2.4.4 Serviceability inter-storey drift deflections
2.4.5 Deflection limits
2.5 Fire reaction and resistance
2.5.1 General
2.5.2 Method
2.6 Acoustic requirements
2.6.1 General
2.6.2 Method
2.6.3 Laboratory versus field measurements
2.7 Ceiling movement considerations
2.7.1 General
2.7.2 Thermal
2.7.3 Hygroscopic
2.8 Durability (for New Zealand only)
Section 3 Construction, installation and maintenance
3.1 Pre-construction
3.2 Site conditions and installation
3.2.1 Site conditions
3.2.2 Installation
3.3 Setting out
3.4 Ceiling systems
3.5 Top fasteners
3.5.1 General
3.5.2 Fixing into concrete
3.5.3 Fixing into steel
3.6 Hangers, struts and ties
3.7 Partitions
3.8 Bulkheads and upstands
3.9 Tiles and infill panels
3.10 Luminaires
3.11 Finish
3.12 Joints
3.12.1 General
3.12.2 Control joints
3.12.3 Building movement joints
3.13 Protection of installed ceiling
3.14 Inspection of installed ceiling
3.15 Maintenance
Section 4 Detailing, ceiling restraint and services interaction
4.1 Ceiling layout
4.2 Services and other attachments
4.2.1 General
4.2.2 Services including air conditioning and ventilation
4.2.3 Electrical services
4.2.4 Sprinklers
4.2.5 Other
4.3 Seismic restraint of the ceiling
4.3.1 General
4.3.2 Joint types
4.3.3 Seismic restraint types
4.4 Ceiling and services interaction
Section 5 Materials
5.1 General
5.2 Aluminium
5.3 Copper
5.4 Zinc-coated and aluminium/zinc-coated steel
5.5 Steel sections
5.6 Stainless steel
5.7 Timber
5.8 Protective coatings
5.9 Paints
5.9.1 Paint for metal protection
5.9.2 Paint for protection and decoration
5.9.3 Pre-painted post-formed metal sections
5.9.4 Finishes
5.10 Powder coated sections
5.10.1 Aluminium substrate
5.10.2 Metal substrate other than aluminium
5.11 Colour and texture
5.11.1 General
5.11.2 Colour texture and gloss
5.12 Adhesion and resilience
Section 6 Testing
6.1 Testing methods
6.1.1 General
6.1.2 Sub-assemblies
6.1.3 Grid ceiling systems
6.1.4 Other ceiling grid systems
6.2 Testing
6.2.1 Testing for material properties
6.2.2 Testing for determining section or member properties
6.2.3 Testing of connections
6.2.4 Dynamic testing
6.3 Testing protocol
6.3.1 Test specimen
6.3.2 Number of tests
6.3.3 Pre-loading test samples
6.3.4 Criteria for acceptance
6.3.5 Determination of design capacities
6.3.6 Reporting of results
6.4 Fire reaction and resistance
6.4.1 Testing for early fire hazard properties
6.4.2 Testing for resistance to fire
6.4.3 Testing for flammability (Australia only)
6.4.4 Test method reporting
6.5 Acoustic testing
6.5.1 Sound absorption
6.5.2 Airborne sound insulation
6.5.3 Impact sound insulation
6.5.4 Test method reporting
6.6 Alternative test methods
Appendix A (normative) Bulkheads
Appendix B (informative) Design and tender
Appendix C (informative) Site conditions, installation and inspection
Appendix D (informative) Setting out and levelling
Appendix E (informative) Installation of external ceilings
Appendix F (informative) Material selection and performance — Australia only
Appendix G (informative) Fasteners
Appendix H (informative) Hangers and struts
Appendix I (informative) Ceiling grid systems
Appendix J (informative) Tiles and infill panels
Appendix K (informative) Partitions
Bibliography
Previous versions
AS/NZS 2785:2020
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.