NCC 2022 Volume Two Housing Provisions PDF

Volume Two & Housing Provisions 2022 General table of contents NCC 2022 Volume Two - Building Code of Australia Class 1 and 10 buildings Copyright and Licence Notice...................................................................................... 9...

Volume Two & Housing Provisions 2022 General table of contents NCC 2022 Volume Two - Building Code of Australia Class 1 and 10 buildings Copyright and Licence Notice...................................................................................... 9 Introduction to the National Construction Code (NCC)............................................10 Introduction to NCC Volume Two............................................................................... 12 List of NCC Specifications.......................................................................................... 13 History of Adoption - NCC Volume Two..................................................................... 15 List of amendments - NCC 2022 Volume Two..........................................................23 Section A Governing requirements Part A1 Interpreting the NCC.................................................................................................. 36 Part A2 Compliance with the NCC.......................................................................................... 39 Part A3 Application of the NCC in States and Territories......................................................43 Part A4 Referenced documents.............................................................................................. 44 Part A5 Documentation of design and construction.............................................................46 Part A6 Building classification................................................................................................ 53 Part A7 United buildings.......................................................................................................... 65 Specification 1 Fire-resistance of building elements......................................................................... 67 Specification 2 Descriptions of elements referred to in Specification 1............................................73 Specification 3 Fire hazard properties................................................................................................ 79 Section H Class 1 and 10 buildings Part H1 Structure..................................................................................................................... 85 Part H2 Damp and weatherproofing..................................................................................... 106 Part H3 Fire safety.................................................................................................................. 115 Part H4 Health and amenity................................................................................................... 121 Part H5 Safe movement and access..................................................................................... 130 Part H6 Energy efficiency...................................................................................................... 134 Part H7 Ancillary provisions and additional construction requirements.............................142 Part H8 Livable housing design............................................................................................. 151 Specification 42 House energy rating software.................................................................................. 154 Specification 44 Calculation of heating load limit, cooling load limit and thermal energy load limit156 Schedule 1 Definitions Abbreviations............................................................................................................ 160 Symbols..................................................................................................................... 162 Glossary.................................................................................................................... 164 Schedule 2 Referenced documents Page 2  Referenced documents............................................................................................ 200 Schedule 3 Commonwealth of Australia Footnote: Other legislation and policies affecting buildings..................................218 Schedule 4 Australian Capital Territory ACT Introduction............................................................................................................... 221 ACT Footnote: Other legislation affecting buildings......................................................222 Schedule 5 New South Wales NSW Introduction.............................................................................................................. 225 Section A Governing requirements.......................................................................................... 226 Section H Class 1 and 10 buildings........................................................................................... 227 NSW Part H6 Energy efficiency..................................................................................................... 230 Schedule 1 Definitions................................................................................................................ 234 Schedule 2 Referenced documents............................................................................................ 236 NSW Footnote: Other legislation affecting buildings......................................................238 Schedule 6 Northern Territory Section H Class 1 and 10 buildings........................................................................................... 243 NT Part H6 Energy efficiency..................................................................................................... 244 Schedule 2 Referenced documents............................................................................................ 248 NT Footnote: Other legislation affecting buildings......................................................249 Schedule 7 Queensland Section H Class 1 and 10 buildings........................................................................................... 253 Schedule 1 Definitions................................................................................................................. 256 Schedule 2 Referenced documents............................................................................................ 257 QLD Footnote: Other legislation affecting buildings......................................................258 Schedule 8 South Australia Section A Governing requirements........................................................................................... 261 Section H Class 1 and 10 buildings........................................................................................... 262 SA Part H9 Water efficiency....................................................................................................... 266 SA Part H10 Access for people with a disability.......................................................................... 268 Schedule 1 Definitions................................................................................................................. 270 Schedule 2 Referenced documents............................................................................................ 272 SA Footnote: Other legislation affecting buildings......................................................273 Schedule 9 Tasmania Section A Governing requirements.......................................................................................... 278 Section H Class 1 and 10 buildings........................................................................................... 279 Schedule 1 Definitions................................................................................................................. 281 Schedule 2 Referenced documents............................................................................................ 282 Page 3  TAS Footnote: Other legislation affecting buildings......................................................286 Schedule 10 Victoria Section A Governing requirements.......................................................................................... 288 Section H Class 1 and 10 buildings........................................................................................... 289 Schedule 1 Definitions................................................................................................................. 291 Schedule 2 Referenced documents............................................................................................ 293 VIC Footnote: Other legislation affecting buildings......................................................299 Schedule 11 Western Australia WA Introduction.............................................................................................................. 304 Section H Class 1 and 10 buildings........................................................................................... 305 WA Part H9 Water use................................................................................................................. 308 Schedule 1 Definitions................................................................................................................. 311 Schedule 2 Referenced documents............................................................................................ 312 WA Footnote: Other legislation affecting buildings.......................................................313 ABCB Housing Provisions Copyright and Licence Notice.................................................................................. 318 How to use the Housing Provisions......................................................................... 319 List of amendments - ABCB Housing Provisions....................................................322 2 Structure Part 2.1 Scope and application of Section 2......................................................................... 333 Part 2.2 Structural provisions.............................................................................................. 334 3 Site preparation Part 3.1 Scope and application of Section 3........................................................................ 340 Part 3.2 Earthworks................................................................................................................ 341 Part 3.3 Drainage................................................................................................................... 344 Part 3.4 Termite risk management........................................................................................ 350 4 Footings and slabs Part 4.1 Scope and application of Section 4......................................................................... 355 Part 4.2 Footings, slabs and associated elements............................................................... 358 5 Masonry Part 5.1 Scope and application of Section 5......................................................................... 387 Part 5.2 Masonry veneer....................................................................................................... 388 Part 5.3 Cavity masonry........................................................................................................ 390 Part 5.4 Unreinforced single leaf masonry........................................................................... 393 Part 5.5 Isolated piers............................................................................................................ 399 Part 5.6 Masonry components and accessories.................................................................. 402 Page 4  Part 5.7 Weatherproofing of masonry................................................................................... 415 6 Framing Part 6.1 Scope and application of Section 6......................................................................... 420 Part 6.2 Subfloor ventilation.................................................................................................. 421 Part 6.3 Structural steel members........................................................................................ 425 7 Roof and wall cladding Part 7.1 Scope and application of Section 7......................................................................... 458 Part 7.2 Sheet roofing............................................................................................................ 459 Part 7.3 Roof tiles and shingles............................................................................................. 469 Part 7.4 Gutters and downpipes............................................................................................ 478 Part 7.5 Timber and composite wall cladding...................................................................... 488 8 Glazing Part 8.1 Scope and application of Section 8......................................................................... 500 Part 8.2 Windows and external glazed doors....................................................................... 501 Part 8.3 Glass......................................................................................................................... 503 Part 8.4 Glazing human impact............................................................................................. 506 9 Fire safety Part 9.1 Scope and application of Section 9......................................................................... 513 Part 9.2 Fire separation of external walls.............................................................................. 514 Part 9.3 Fire protection of separating walls and floors.........................................................541 Part 9.4 Fire protection of garage top dwellings.................................................................. 546 Part 9.5 Smoke alarms and evacuation lighting................................................................... 548 10 Health and amenity Part 10.1 Scope and application of Section 10....................................................................... 554 Part 10.2 Wet area waterproofing........................................................................................... 555 Part 10.3 Room heights............................................................................................................ 575 Part 10.4 Facilities.................................................................................................................... 577 Part 10.5 Light.......................................................................................................................... 579 Part 10.6 Ventilation................................................................................................................. 583 Part 10.7 Sound insulation....................................................................................................... 586 Part 10.8 Condensation management..................................................................................... 597 11 Safe movement and access Part 11.1 Scope and application of Section 11........................................................................ 601 Part 11.2 Stairway and ramp construction............................................................................. 602 Part 11.3 Barriers and handrails............................................................................................... 611 12 Ancillary provisions Part 12.1 Scope and application of Section 12....................................................................... 625 Page 5  Part 12.2 Construction in alpine areas.................................................................................... 626 Part 12.3 Attachment of framed decks and balconies to external walls of buildings using a waling plate.............................................................................................................. 629 Part 12.4 Heating appliances, fireplaces, chimneys and flues..............................................634 13 Energy efficiency Part 13.1 Scope and application of Section 13....................................................................... 642 Part 13.2 Building fabric.......................................................................................................... 643 Part 13.3 External glazing........................................................................................................ 681 Part 13.4 Building sealing......................................................................................................... 711 Part 13.5 Ceiling fans............................................................................................................... 714 Part 13.6 Whole-of-home energy usage................................................................................. 715 Part 13.7 Services..................................................................................................................... 718 Schedule 1 Definitions Abbreviations........................................................................................................... 726 Symbols.................................................................................................................... 728 Glossary.................................................................................................................... 730 Schedule 2 Referenced documents Referenced documents............................................................................................ 766 Schedule 3 Commonwealth of Australia Schedule 4 Australian Capital Territory Schedule 5 New South Wales 3 Site preparation........................................................................................................ 786 4 Footings and slabs.................................................................................................... 787 9 Fire safety................................................................................................................. 789 NSW Part 9.4 Fire protection of garage top dwellings.................................................................. 790 13 Energy efficiency...................................................................................................... 791 NSW Part 13.1 Scope and application of Section 13....................................................................... 795 Schedule 1 Definitions................................................................................................................. 796 Schedule 2 Referenced documents............................................................................................ 798 Schedule 6 Northern Territory 3 Site preparation........................................................................................................ 802 10 Health and amenity.................................................................................................. 803 NT Part 10.7 Sound insulation...................................................................................................... 804 13 Energy efficiency...................................................................................................... 816 NT Part 13.1 Scope and application of Section 13........................................................................ 817 NT Part 13.2 Building fabric........................................................................................................... 818 NT Part 13.3 External glazing........................................................................................................ 826 Page 6  NT Part 13.4 Building sealing........................................................................................................ 829 NT Part 13.5 Air movement............................................................................................................ 831 NT Part 13.7 Services.................................................................................................................... 833 Schedule 2 Referenced documents............................................................................................ 836 Schedule 7 Queensland 3 Site preparation........................................................................................................ 838 Schedule 1 Definitions................................................................................................................ 840 Schedule 2 Referenced documents............................................................................................ 841 Schedule 8 South Australia 4 Footings and slabs................................................................................................... 843 9 Fire safety................................................................................................................. 845 10 Health and amenity.................................................................................................. 850 13 Energy efficiency..................................................................................................... 853 Schedule 1 Definitions................................................................................................................ 854 Schedule 2 Referenced documents............................................................................................ 856 Schedule 9 Tasmania 10 Health and amenity.................................................................................................. 858 13 Energy efficiency..................................................................................................... 859 Schedule 1 Definitions................................................................................................................ 860 Schedule 2 Referenced documents............................................................................................ 861 Schedule 10 Victoria Schedule 1 Definitions................................................................................................................ 866 Schedule 2 Referenced documents............................................................................................ 868 Schedule 11 Western Australia WA Introduction.............................................................................................................. 875 2 Structure................................................................................................................... 876 WA Part 2.3 Changes to AS/NZS 1170.2:2021 and AS 4055:2021.............................................880 Schedule 1 Definitions................................................................................................................ 886 Schedule 2 Referenced documents............................................................................................ 887 Page 7  Volume Two Building Code of Australia 2022  Preface Copyright and Licence Notice © Commonwealth of Australia and the States and Territories of Australia 2022, published by the Australian Building Codes Board The material in this publication is licensed under a Creative Commons Attribution-NoDerivatives - 4.0 International licence, with the exception of: any third party material any trade marks, and any images or photographs. You may not make derivatives of this publication, but may only use a verbatim copy. More information on this CC BY ND license is set out at the Creative Commons Website. Enquiries about this publication can be sent to: Australian Building Codes Board GPO Box 2013, Canberra ACT 2601 Phone: 1300 134 631 Email: [email protected] Web: abcb.gov.au Attribution Use of all or part of this publication must include the following attribution: © Commonwealth of Australia and the States and Territories 2022, published by the Australian Building Codes Board. Disclaimer By accessing or using this publication, you agree to the following: While care has been taken in the preparation of this publication, it may not be complete or up-to-date. You can ensure that you are using a complete and up-to-date version by checking the Australian Building Codes Board website (abcb.gov.au). The Australian Building Codes Board, the Commonwealth of Australia and States and Territories of Australia do not accept any liability, including liability for negligence, for any loss (howsoever caused), damage, injury, expense or cost incurred by any person as a result of accessing, using or relying upon this publication, to the maximum extent permitted by law. No representation or warranty is made or given as to the currency, accuracy, reliability, merchantability, fitness for any purpose or completeness of this publication or any information which may appear on any linked websites, or in other linked information sources, and all such representations and warranties are excluded to the extent permitted by law. This publication is not legal or professional advice. Persons rely upon this publication entirely at their own risk and must take responsibility for assessing the relevance and accuracy of the information in relation to their particular circumstances. NCC 2022 Volume Two - Building Code of Australia (1 May 2023) Page 9  Preface Introduction to the National Construction Code (NCC) About the NCC The NCC is Australia’s primary set of technical design and construction provisions for buildings. As a performance-based code, it sets the minimum required level for the safety, health, amenity, accessibility and sustainability of certain buildings. It primarily applies to the design and construction of new buildings, and plumbing and drainage systems in new and existing buildings. In some cases it may also apply to structures associated with buildings and new building work or new plumbing and drainage work in existing buildings. The Australian Building Codes Board (ABCB), on behalf of the Australian Government and each State and Territory government, produces and maintains the NCC. When determining the content of the NCC, the ABCB seeks to— ensure requirements have a rigorously tested rationale; and effectively and proportionally address applicable issues; and create benefits to society that outweigh costs; and consider non-regulatory alternatives; and consider the competitive effects of regulation; and not be unnecessarily restrictive. The primary users of the NCC include architects, builders, plumbers, building surveyors, hydraulic consultants, engineers and other building and plumbing related professions and trades. Format of the NCC The NCC is published in three volumes. The Building Code of Australia (BCA) is Volumes One and Two of the NCC and the Plumbing Code of Australia (PCA) is Volume Three of the NCC. Components of the NCC The NCC provides the technical provisions for the design and construction of buildings and other structures, and plumbing and drainage systems. NCC Volume One primarily covers the design and construction of multi-residential, commercial, industrial and public assembly buildings and some associated structures. NCC Volume Two primarily covers the design and construction of smaller scale buildings including houses, small sheds, carports and some associated structures. NCC Volume Three covers the design, construction and maintenance of plumbing and drainage systems in new and existing buildings. Each volume contains— Governing Requirements; and Performance Requirements; and compliance options to meet the NCC requirements; and State and Territory variations and additions. The NCC uses building classifications to identify requirements for different intended purposes of buildings or parts of buildings. A building classification relates to the characteristics and the intended use of the building. Information on building classifications is found in Part A6 of the Governing Requirements. Legislative arrangements and the NCC The NCC is given legal effect through State and Territory, or other statutory authority, building and plumbing legislation. These Acts and Regulations set out the legal framework and administration mechanisms for the NCC to support the design and construction of buildings. NCC 2022 Volume Two - Building Code of Australia (1 May 2023) Page 10  Preface The dates of adoption of the NCC are determined by State and Territory building and plumbing administrations. How to use the NCC Each volume of the NCC is split into two main sections: Administrative requirements contained within the Governing Requirements. Technical requirements contained within the remaining sections of the NCC. The Governing Requirements provide the rules and instructions for using and complying with the NCC. They are vital in understanding how the technical requirements of the NCC should be applied to any particular situation. The Governing Requirements are also important in understanding how the NCC fits with the building and plumbing regulatory framework within Australia. NCC clause numbering system The NCC uses a uniform clause numbering system across each of its three volumes. This system is called Section-Part- Type-Clause (SPTC). In each clause number— The first letter indicates which NCC Section sits within, or if the letter S is used, that the clause is part of a Specification. The letter S is used in place of a Section indicator because the same Specification may be called up in several different Sections of the NCC. The first number indicates the number of each Part within a Section, or the number of a Specification. Parts are numbered sequentially within each Section, starting at 1. Specifications are numbered sequentially across all three volumes, also starting at 1. The second letter indicates the clause Type. It will be G, O, F, P, V, D or C and these are explained below. The second number is the clause number within each Part or Specification. The clause Types used in the NCC are as follows: G = Governing requirement (mandatory) O = Objective (guidance) F = Functional Statement (guidance) P = Performance Requirement (mandatory) V = Verification Method (optional) D = Deemed-to-Satisfy Provision (optional) C = Clause in a Specification (clauses in Specifications may be mandatory or optional, depending on how the Specification is called up by the NCC). Informative parts of the NCC (e.g. Introduction to the NCC) are not numbered and do not have numbered paragraphs. This helps make it easy to see that their content is information only and does not contain any regulatory requirements. NCC 2022 Volume Two - Building Code of Australia (1 May 2023) Page 11  Preface Introduction to NCC Volume Two About NCC Volume Two NCC Volume Two contains technical design and construction requirements for certain residential and non-habitable buildings and structures. Volume Two contains the requirements for— Class 1 and 10a buildings (other than access requirements for people with a disability in Class 1b and 10a buildings); and certain Class 10b structures (other than access requirements for people with a disability in Class 10b swimming pools); and Class 10c private bushfire shelters. Components of NCC Volume Two NCC Volume Two contains the following Sections: Section A – Governing Requirements Section H – Housing: ◾ Part H1 – Structure ◾ Part H2 – Damp and weatherproofing ◾ Part H3 – Fire safety ◾ Part H4 – Health and amenity ◾ Part H5 – Safe movement and access ◾ Part H6 – Energy efficiency ◾ Part H7 – Ancillary provisions and additional construction requirements ◾ Part H8 – Livable housing design Schedules— ◾ Abbreviations and symbols ◾ Definitions ◾ Referenced documents ◾ State and Territory variations and additions NCC 2022 Volume Two - Building Code of Australia (1 May 2023) Page 12  Preface List of NCC Specifications Table 1 sets out the number and title of each NCC Specification, along with the clauses in each NCC Volume that refer to the Specification. Table 1: List of NCC Specifications Spec Title References no. Vols. One, Two and Housing Vol. Three Provisions 1 Fire resistance of building elements A5G5; A5G6; C4D15; S2C1; A5G5; A5G6 S9C2 2 Description of materials referred to in Specification 1 A5G5; A5G6; C4D15; S1C2; A5G5; A5G6 S9C2 3 Fire hazard properties (determination) A5G6 A5G6 4 Design of buildings in cyclonic areas B1D3 - 5 Fire-resisting construction C2D2; C2D10; C3D6; C3D8; - C3D9; C3D10; C3D11; C3D13; C4D6; C4D8; C4D13; C4D15; D2D13; E1D5; G3D6; S17C11; S18C4; S31C3 6 Structural tests for lightweight construction B1D4; C2D9; S5C23; S14C2; - S32C2; S32C3; Housing Provisions 9.3.1 7 Fire hazard properties (requirements) C2D11; C2D14; S3C2; - S14C2; S19C7; S32C6 8 Performance of external walls in fire C2D12 - 9 Cavity barriers for fire-protected timber C2D13; C4D16; S5C11; - S5C20 10 Fire protected timber S1C2 - 11 Smoke-proof walls in health-care and residential care C3D6; C3D15; C4D12; - buildings E2D11 12 Fire doors, smoke doors, fire windows and shutters C4D5; G3D4; S11C2; S11C3 - 13 Penetration of walls, floors and ceilings by services C4D15 - 14 Non-required stairways, ramps and escalators C2D11; D2D17 - 15 Braille and tactile signs D4D7; S27C10 - 16 Accessible water entry/exit for swimming pools D4D11 - 17 Fire sprinkler systems C1V3; C2D6; C2D13; C3D2; - C3D4; C3D7; C3D8; C4D6; C4D7; C4D8; C4D9; C4D12; D2D4; D2D17; E1D4; E2D8; E2D9; E2D10; E2D11; E2D13; E2D14; E2D15; E2D16; E2D17; E2D19; E2D20; G3D1; G3D6; G6D6; I1D2; S5C10; S5C11; S5C14; S5C18; S5C19; S5C20; S5C21; S5C22; S5C24; S7C3; S7C4; S19C11; S20C3; S20C4; S20C5; S31C2 NCC 2022 Volume Two - Building Code of Australia (1 May 2023) Page 13  Preface Spec Title References no. Vols. One, Two and Housing Vol. Three Provisions 18 Class 2 and 3 buildings not more than 25 m in effective E1D4; S17C2; S23C1; - height S23C3 19 Fire control centres E1D14 - 20 Smoke detection and alarm systems E2D3; E2D5; E2D7; E2D8; - E2D9; E2D11; E2D13; E2D14; E2D15; E2D16; E2D17; E2D18; E2D19; E2D20; S5C19; S5C22; S17C8; S18C3; S21C7; S21C8; S22C3 21 Smoke exhaust systems C3D13; E2D10; E2D14; - E2D15; E2D16; E2D17; E2D18; E2D19; E2D20; S20C6; S20C8 22 Smoke-and-heat vents E2D10; E2D14; E2D15; - E2D16; E2D17; E2D18; E2D19; E2D20; S20C8 23 Residential fire safety systems S18C3; S18C4 - 24 Lift installations E3D2 - 25 Photoluminescent exit signs E4D8 - 26 Waterproofing and water resistance requirements for F1D6 - building elements in wet areas 27 Accessible adult change facilities F4D12; S15C1 - 28 Sound insulation for building elements F5D3; F5D4 - 29 Impact sound — Test of equivalence F5D4; S28C2 - 30 Installation of boilers and pressure vessels G2D2 - 31 Fire and smoke control in buildings containing atriums G3D4; G3D8; S14C2 - 32 Construction of proscenium walls C2D11; I1D3 - 33 Additional requirements J1V1; J1V2; J1V3; J1V5 - 34 Modelling parameters J1V3; S35C1 - 35 Modelling profiles S34C3 - 36 Material properties J4D3 - 37 Calculation of U-Value and solar admittance J3D9; J3D13; J4D3; J4D6 - 38 Spandrel panel thermal performance S37C3; S37C4 - 39 Sub-floor thermal performance J4D3 - 40 Lighting and power control devices J7D3; J7D4; J7D5; J7D6; - J7D7 41 Cross-connection hazards - B5D2; B5D3; B5D4 42 House energy rating software H6D2 - 43 Bushfire protection for certain Class 9 buildings G5D4 - 44 Calculation of heating load limit, cooling load limit and J1P2; H6P1 - thermal energy load limit 45 Modelling profiles for J1V5 J1V5 - NCC 2022 Volume Two - Building Code of Australia (1 May 2023) Page 14  Preface History of Adoption - NCC Volume Two Adoption of NCC Volume Two The adoption of each edition of NCC Volume Two (also referred to as BCA Volume Two) is set out in Table 1. Table 1: History of adoption of NCC Volume Two Edition Common ACT NSW NT QLD SA TAS VIC WA wealth BCA 96 1 Jul 1 Jul 1 Jul 7 Jan 1 Jul 1 Jan 1 Jul 1 Aug 1 Jul 1997 1997 1997 1998 1997 1998 1997 1997 1997 BCA 96 1 Jul 1 Jul 1 Jul 7 Jan 1 Jul 1 Jan 1 Jul 1 Aug 1 Jul Amdt 1 1997 1997 1997 1998 1997 1998 1997 1997 1997 BCA 96 1 Jan 1 Jan 27 Feb 7 Jan 1 Jan 1 Jan 1 Jan 1 Jan 1 Jan Amdt 2 1998 1998 1998 1998 1998 1998 1998 1998 1998 BCA 96 1 Jul 1 Jul 1 Jul 1 Jul 1 Jul 13 Jul 1 Jul 1 Jul 1 Jul Amdt 3 1998 1998 1998 1998 1998 1998 1998 1998 1998 BCA 96 1 Jan 17 May 1 Feb 1 Jan 1 Jan 1 Jan 1 Jan 1 Jan 1 Jan Amdt 4 1999 1999 1999 1999 1999 1999 1999 1999 1999 BCA 96 1 Jul 3 Nov 1 Aug 1 Jul 1 Jul 1 Jul 1 Jul 1 Jul 1 Jul Amdt 5 1999 1999 1999 1999 1999 1999 1999 1999 1999 BCA 96 1 Jan 10 Feb 1 Jan 1 Jan 1 Jan 17 Jan 1 Jan 1 Jan 1 Jan Amdt 6 2000 2000 2000 2000 2000 2000 2000 2000 2000 BCA 96 1 Jul 10 Jul 1 Jul 1 Jul 1 Jul 1 Jul 1 Jul 1 Jul 1 Jul Amdt 7 2000 2000 2000 2000 2000 2000 2000 2000 2000 BCA 96 1 Jan 11 Jan 1 Jan 1 Jan 1 Jan 1 Jan 1 Jan 1 Jan 1 Jan Amdt 8 2001 2001 2001 2001 2001 2001 2001 2001 2001 BCA 96 1 Jul 12 Jul 1 Jul 1 Jul 1 Jul 2 Jul 1 Jul 1 Jul 1 Jul Amdt 9 2001 2001 2001 2001 2001 2001 2001 2001 2001 BCA 96 1 Jan 1 Jan 1 Jan 1 Jan 1 Jan 1 Jan 1 Jan 1 Jan 1 Jan Amdt 10 2002 2002 2002 2002 2002 20021 2002 2002 2002 BCA 96 1 Jul 1 Jul 1 Jul 1 Jul 1 Jul 1 Jul 1 Jul 1 Jul 1 Jul Amdt 11 2002 20022 2002 2002 2002 2002 2002 2002 2002 BCA 96 1 Jan 1 Jan 1 Jan 1 Jan 1 Jan 1 Jan 1 Jan 1 Jan 1 Jan Amdt 12 2003 2003 2003 2003 2003 2003 2003 2003 2003 BCA 96 1 Jul 1 Jul 1 Jul 1 Jul 1 Jul 1 Jul 1 Jul 1 Jul 1 Jul Amdt 13 2003 2003 2003 2003 20033 2003 2003 2003 2003 BCA 2004 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 2004 2004 2004 2004 2004 2004 2004 2004 2004 BCA 2005 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 2005 2005 2005 2005 2005 2005 2005 2005 2005 BCA 2006 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 2006 2006 2006 2006 2006 20064 2006 2006 2006 BCA 2007 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 2007 2007 2007 2007 2007 20075 2007 2007 2007 BCA 2008 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 2008 2008 2008 2008 2008 2008 2008 2008 2008 BCA 2009 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 2009 2009 2009 2009 2009 2009 2009 2009 2009 NCC 2022 Volume Two - Building Code of Australia (1 May 2023) Page 15  Preface Edition Common ACT NSW NT QLD SA TAS VIC WA wealth BCA 2010 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 2010 2010 2010 2010 2010 20106 2010 2010 2010 NCC 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 NCC 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 2012 2012 2012 2012 2012 2012 2012 2012 2012 2012 NCC 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 2013 2013 2013 2013 2013 2013 2013 2013 2013 2013 NCC 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 2014 2014 2014 2014 2014 2014 2014 2014 2014 2014 NCC 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 2015 2015 2015 2015 2015 2015 2015 2015 2015 2015 NCC 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 NCC 1 May 1 June 1 May 1 May 1 May 1 May 1 May 1 May 1 May 2019 2019 2019 2019 2019 2019 2019 2019 2019 2019 NCC 1 Jul 1 Jul 1 Jul 1 Jul 1 Jul 1 Jul 1 Jul 1 Jul 1 Jul 2019 2020 2020 2020 2020 2020 2020 2020 2020 2020 Amdt 1 NCC 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 1 May 2022 2023 2023 2023 2023 2023 2023 2023 2023 2023 Table Notes (1) 1 January 2002 (except SA2 - date to be advised). (2) 1 July 2002 (except Australian Capital Territory additions - which was adopted on 21 June 2002). (3) 1 July 2003 (except for Parts 2.6 and 3.12 which are adopted on 1 September 2003). (4) 1 May 2006, except for South Australian variations P2.6.2, V2.6.2.3 and 3.12.5.4 and South Australian addition SA2 which were adopted on 1 July 2006. The adoption of South Australian variation clause 3.7.4.2 is yet to be advised. (5) 1 May 2007, excluding South Australian variation clause 3.7.4.2, (for the purposes of sub-clauses (1) and (2) of Schedule 18 of the Development Regulations 1993): and sub-clause c) of variation clause 3.7.4.2 (for the purpose of sub-clauses (3) and (4) of Schedule 18 of the Development Regulations 1993). (6) 1 May 2010 except for Parts 2.6 and 3.12, which were adopted on 1 September 2010, and the restriction on child resistant door sets in 3.9.3.0 and the additional bushfire requirements for ‘excluded areas’ prescribed in SA 3.7.4.2(d) and (e), which were adopted on 2 December 2010. Adoption of BCA 96 Volume Two The 1996 edition of the BCA Volume Two was adopted as set out in Table 1. BCA 96 Amendment No. 1 Amendment No. 1 of the 1996 edition of the BCA Volume Two was adopted as set out in Table 1. The purpose of Amendment No. 1 is to— include typographical changes including spelling, punctuation, cross references and layout; and include reference to a Certificate of Conformity issued by the ABCB in A2.2; and change the reference to the Standards Mark Certificate to refer to JAS–ANZ in A2.2; and update references to Standards. Note: The revisions contained in Amendment No. 1 to the Housing Provisions have not been marked in the text. NCC 2022 Volume Two - Building Code of Australia (1 May 2023) Page 16  Preface BCA 96 Amendment No. 2 Amendment No. 2 of the 1996 edition of the BCA Volume Two was adopted as set out in Table 1. The purpose of Amendment No. 2 is to— include typographical changes including spelling, punctuation, cross references and layout; and update references to Standards; and include minor technical changes. BCA 96 Amendment No. 3 Amendment No. 3 of the 1996 edition of the BCA Volume Two was adopted as set out in Table 1. The purpose of Amendment No. 3 is to— incorporate the outcomes of the 1997 ABCB Variations Conference; and update references to Standards; and include minor technical changes. BCA 96 Amendment No. 4 Amendment No. 4 of the 1996 edition of the BCA Volume Two was adopted as set out in Table 1. The purpose of Amendment No. 4 is to— update references to Standards; and include minor technical changes. BCA 96 Amendment No. 5 Amendment No. 5 of the 1996 edition of the BCA Volume Two was adopted as set out in Table 1. The purpose of Amendment No. 5 is to— update references to Standards; and expand on the requirements for subfloor ventilation based on climatic conditions; and revise the Acceptable Construction Practice for Steel framing; and include additional details in the Acceptable Construction Practice for fencing of swimming pools; and include minor technical changes. BCA 96 Amendment No. 6 Amendment No. 6 of the 1996 edition of the BCA Volume Two was adopted as set out in Table 1. The purpose of Amendment No. 6 is to— update references to Standards; and revise the Acceptable Construction Practice for Footing and Slab Construction; and replace Sound Transmission Class (STC) with weighted sound reduction index (Rw) within Part 3.8.6; and include minor technical changes. BCA 96 Amendment No. 7 Amendment No. 7 of the 1996 edition of the BCA Volume Two was adopted as set out in Table 1. The purpose of Amendment No. 7 is to— update references to Standards; and include requirements for separation of eaves and verandah spaces that are open to the roof space and common to 2 or more Class 1 buildings; and NCC 2022 Volume Two - Building Code of Australia (1 May 2023) Page 17  Preface reinstate the Acceptable Construction Practice for buildings in bushfire-prone areas, following alignment with the 1999 version of AS 3959; and change the limitations on winders used in lieu of quarter and half landings within stairways; and include minor technical changes. BCA 96 Amendment No. 8 Amendment No. 8 of the 1996 edition of the BCA Volume Two was adopted as set out in Table 1. The purpose of Amendment No. 8 is to— update references to Standards; and include minor technical changes; and achieve greater consistency between both Volumes of the BCA for stair construction. BCA 96 Amendment No. 9 Amendment No. 9 of the 1996 edition of the BCA Volume Two was adopted as set out in Table 1. The purpose of Amendment No. 9 is to— update references to Standards; and include minor technical changes; and clarify which glazing assemblies must comply with AS 2047 and which must comply with AS 1288. BCA 96 Amendment No. 10 Amendment No. 10 of the 1996 edition of the BCA Volume Two was adopted as set out in Table 1. The purpose of Amendment No. 10 is to— update references to Standards; and update the requirements for protective coatings for steelwork in locations near saltwater; and align Figure 3.6.1 dealing with glazing with AS 1288; and extend the concession for fire separation of windows in non-habitable rooms to windows in bathrooms, laundries and toilets and also include buildings on the same allotment; and replace testing to AS/NZS 1530.3 for timber in bushfire areas with reference to AS/NZS 3837; and include minor technical changes. BCA 96 Amendment No. 11 Amendment No. 11 of the 1996 edition of the BCA Volume Two was adopted as set out in Table 1. The purpose of Amendment No. 11 is to— update references to Standards; and transfer public policy matters, with respect to structural adequacy, from the AS 1170 series to the BCA; and introduce new definitions and more detailed provisions on the installation of flashings and damp-proof courses; and include minor technical changes. BCA 96 Amendment No. 12 Amendment No. 12 of the 1996 edition of the BCA Volume Two was adopted as set out in Table 1. The purpose of Amendment No. 12 is to— update references to Standards; and allow the use of either the 1989 editions or the 2002 editions of the 1170 series of standards; and NCC 2022 Volume Two - Building Code of Australia (1 May 2023) Page 18  Preface include Energy Efficiency measures into the Housing Provisions; and include minor technical changes. Note: Only substantive typographical corrections are noted in the margin. BCA 96 Amendment No. 13 Amendment No. 13 of the 1996 edition of the BCA Volume Two was adopted as set out in Table 1. The purpose of Amendment No. 13 is to— update references to Standards; and refine the Energy Efficiency provisions and advise of their adoption in Western Australia and Queensland; and include minor technical changes. Note: Only substantive typographical corrections are noted in the margin. Adoption of BCA 2004 Volume Two The 2004 edition of the BCA was adopted as set out in Table 1. The purpose of BCA 2004 Volume Two is to— remove references to BCA 96; and clarify the method of determining the Performance Requirements that are relevant to Alternative Solutions; and update references to other documents; and revise the acceptable construction practice for footing and slab construction; and prohibit the use of lead on roofs used to collect potable water; and reform the provisions for sound insulation; and update the Energy Efficiency provisions; and include minor technical changes. Adoption of BCA 2005 Volume Two The 2005 edition of the BCA Volume Two was adopted as set out in Table 1. The purpose of BCA 2005 Volume Two is to— update references to other documents; and update the provisions for waterproofing of wet areas; and update balustrading provisions to include wire balustrades; and include minor technical changes. Adoption of BCA 2006 Volume Two The 2006 edition of the BCA Volume Two was adopted as set out in Table 1. The purpose of BCA 2006 Volume Two is to— update references to other documents; and convert the W wind speed categories to the N and C wind speed categories; and include a national testing regime for cladding in cyclonic areas; and include enhanced energy efficiency provisions; and include minor technical changes. Adoption of BCA 2007 Volume Two The 2007 edition of the BCA Volume Two was adopted as set out in Table 1. NCC 2022 Volume Two - Building Code of Australia (1 May 2023) Page 19  Preface The purpose of BCA 2007 Volume Two is to— update references to other documents; and clarify that compliance with either the appropriate acceptable construction manuals or the appropriate acceptable construction practice set out in Section 3 is deemed to comply with the Performance Requirements; and clarify when it is appropriate to use the acceptable construction practice for the installation of glazing and when it is necessary for windows to comply with AS 2047; and update acceptable construction practice for the installation of glazing to align with recent changes to AS 1288; and update Energy Efficiency provisions including providing clarification and additional information; and include minor technical changes. Adoption of BCA 2008 Volume Two The 2008 edition of the BCA Volume Two was adopted as set out in Table 1. The purpose of BCA 2008 Volume Two is to— update references to other documents; and include lists of other legislation affecting buildings in the various States and Territories; and include provisions for swimming pool water recirculation systems; and include minor technical changes. Adoption of BCA 2009 Volume Two The 2009 edition of the BCA Volume Two was adopted as set out in Table 1. The purpose of BCA 2009 Volume Two is to— update references to other documents; and after expiry of the agreed transition period, except for the 1993 edition of AS 1170.4, delete all references to the older loading standards contained in the AS 1170 series and consequently, all provisions referring to them; and simplify the wire balustrade provisions including the addition of a Verification Method; and clarify the height of rooms in an attic and with a sloping ceiling; and clarify the provisions for the construction of sanitary compartments to enable an unconscious occupant to be removed; and further update the energy efficiency provisions; and include minor technical changes. Adoption of BCA 2010 Volume Two The 2010 edition of the BCA Volume Two was adopted as set out in Table 1. The purpose of BCA 2010 Volume Two is to— update references to other documents; and delete reference to the 1993 edition of AS 1170.4 and consequently all provisions referring to it; and increase the stringency of the energy efficiency provisions and, as part of reducing greenhouse gas emissions, introduce provisions for lighting and the greenhouse gas intensity of the energy source for services such as water and space heaters; and update Part 3.7.4, as a consequence of referencing the 2009 edition of AS 3959 Construction of buildings in bushfire- prone areas, including— ◾ applying the provisions to a Class 10a building or deck associated with a Class 1 building; and ◾ the deletion of the acceptable construction practice; and include minor technical changes. NCC 2022 Volume Two - Building Code of Australia (1 May 2023) Page 20  Preface Adoption of NCC 2011 Volume Two The 2011 edition of the NCC Volume Two was adopted as set out in Table 1. The purpose of NCC 2011 Volume Two is to— update references to other documents; and include provisions for private bushfire shelters for Class 1 dwellings; and revise the definition of Class 1b buildings; and include minor technical changes. Adoption of NCC 2012 Volume Two The 2012 edition of the NCC Volume Two was adopted as set out in Table 1. The purpose of NCC 2012 Volume Two is to— update references to other documents; and include revised provisions aimed at reducing slips, trips and falls in buildings; and remove the acceptable construction practice for masonry following the referencing of AS 4773 Masonry for small buildings, and completion of a 12 month transition period; and restructure the acceptable construction practice for wet areas; and include minor technical changes. Adoption of NCC 2013 Volume Two The 2013 edition of the NCC Volume Two was adopted as set out in Table 1. The purpose of NCC 2013 Volume Two is to— update references to other documents; and include new provisions for openable windows to reduce falls in buildings; and include a Performance Requirement and reference a Standard for construction in flood hazard areas; and include minor technical changes. Adoption of NCC 2014 Volume Two The 2014 edition of the NCC Volume Two was adopted as set out in Table 1. The purpose of NCC 2014 Volume Two is to— update references to other documents; and quantify slip resistance on stair treads in Class 1 buildings; and relocate the energy efficiency provisions for heated water systems to NCC Volume Three; and expand the energy efficiency heating options for swimming pools and associated spa pools; and include a new acceptable construction practice for hardboard cladding; and include minor technical changes. Adoption of NCC 2015 Volume Two The 2015 edition of the NCC Volume Two was adopted as set out in Table 1. The purpose of NCC 2015 Volume Two is to— update references to other documents; and include a Verification Method for structural reliability; and include a Verification Method for weatherproofing of external walls; and include revised Acceptable Construction Practice for termite management systems. NCC 2022 Volume Two - Building Code of Australia (1 May 2023) Page 21  Preface Adoption of NCC 2016 Volume Two The 2016 edition of NCC Volume Two was adopted as set out in Table 1. The purpose of NCC 2016 Volume Two is to— update references to other documents; and amend the “Introduction” and “General Requirements” as part of the initiative to increase the use of Performance Solutions; and include new Verification Methods for structural robustness and indoor air quality; and include changes as a result of the Acceptable Construction Practice Review project, including the provisions for termite risk management, subfloor ventilation, facilities, light and ventilation and stair construction; and include requirements for overflow of eaves gutters; and include minor technical changes. Adoption of NCC 2019 Volume Two The 2019 edition of NCC Volume Two was adopted as set out in Table 1. The purpose of NCC 2019 Volume Two is to— include the Governing Requirements, that result from revision of Part 1 to improve readability and are common to all volumes; and introduce the use of schedules that are common to all volumes; and include new Verification Methods; and include changes resulting from review of acceptable construction practice, including amendments for earthworks, masonry, roof and wall cladding, fire safety and alpine areas; and update references to other documents; and include minor technical changes. NCC 2019 Amendment No. 1 Amendment No. 1 to the 2019 edition of NCC Volume Two was adopted as set out in Table 1. The purpose of NCC Volume Two Amendment 1 is to— require that a process be followed to improve the quality of and documentation for Performance Solutions; and require labelling of Aluminium Composite Panels; and clarify that anti-ponding board requirements only apply to roofs where sarking is installed. NCC 2022 The 2022 edition of NCC Volume Two was adopted as set out in Table 1. The purpose of NCC Volume Two 2022 is to— include quantified Performance Requirements; and include changes resulting from review of housing provisions, including amendments for footings and slabs, masonry, steel framing, waterproofing and glazing; and include amendments relating to allowable encroachments; and incorporate amended energy efficiency and condensation management provisions; and update references to other documents; and include other minor technical changes. NCC 2022 Volume Two - Building Code of Australia (1 May 2023) Page 22  Preface List of amendments - NCC 2022 Volume Two This list has been prepared by the Australian Building Codes Board to assist National Construction Code (NCC) users in identifying changes incorporated in the 2022 edition of the Volume Two of the NCC. The notes provide a description of major changes made from the previous edition of Volume Two. While the Australian Building Codes Board has attempted to include all major changes made from the previous edition of the Volume Two, the Board does not give any warranty nor accept any liability in relation to the contents of this list of amendments. Table 1: List of amendments - NCC 2022 Volume Two Reference Changes and Commentary General Throughout An “Introduction to this Part” has been added to introduce the intent and purpose of every Part of the NCC. Throughout A number of provisions have been amended, restructured, deleted and relocated as part of the initiative to provide a consistent NCC structure and improve NCC usability. Section A—Governing requirements A1G2 A new clause added to specify scope of NCC Volume One. A1G2 A new clause added to specify scope of NCC Volume Three. A1G3 A new clause added to specify scope of NCC Volume Three. A2G2(4)(b) Amended to remove unnecessary duplication. A5G3 A Note has been included to outline transitional arrangements regarding new numbering system and documentary evidence. A5G4 A new clause added to limit lead content in copper alloy plumbing products in contact with drinking water. A5G9 A new clause added to require a NatHERS certificate be issued for the house energy rating software output where house energy rating software is required. A6G1 The limitation statement has been amended to include a Class 9b early childhood centre. Specification 1 Schedule 5 in NCC 2019 Amendment 1 has been relocated into new Specification 1 and 2. Specification 2 Schedule 5 in NCC 2019 Amendment 1 has been relocated into new Specification 1 and 2. Specification 3 Schedule 6 in NCC 2019 Amendment 1 has been relocated into new Specification 3. Part H1—Structure H1D4 Amended to reflect current practice, improve readability and structure including the maximum size and geometry of footings and slabs. H1D5 Amended to reflect current practice, improve readability and structure including requirements for maximum wind speeds, masonry veneer walls, site soil classifications and design details. NCC 2022 Volume Two - Building Code of Australia (1 May 2023) Page 23  Preface Reference Changes and Commentary H1D6 Amended to reflect current practice, improve readability and structure. H1D8 Amended to reflect current practice, improve readability and structure. H1D11 Amended to improve the title and application requirements for Part 12.3 of the ABCB Housing Provisions. Part H2—Damp and weatherproofing H2O1 Amended to improve clarity and includes safeguarding occupants and protect the building from damage from rising damp. H2P1 Amended as a consequence of replacing ‘average recurrence interval’ with ‘annual exceed probability’. H2D2 Amended as a consequence of replacing ‘average recurrence interval’ with ‘annual exceed probability’. H2D4 Amended and includes a new Deemed-to-Satisfy pathway for satisfying weatherproofing of masonry. H2D6 Sub-clause (2) has been amended to replace ‘average recurrence interval’ with ‘annual exceedance probability’ and Sub-clause (3) has been amended to exclude box gutters from Part 7.4 of the ABCB Housing Provisions. H2D8 A new clause which incorporates 3.8.1.3 of Volume Two 2019 Amendment 1 to specify the requirements and application of external waterproofing for roofing systems. Part H3—Fire safety H3P1 Amended and now contains quantified level of performance for protection of Class 1 buildings from the spread of fire. H3P2 Amended and now contains quantified level of performance for automatic warning on detection of smoke in Class 1 buildings. Part H4—Health and amenity H4D2 Amended as a consequence of moving external waterproofing of H2D8 H4D3 A new clause has been included for installation and materials of wet are components and systems. H4V5 Amended to include new references to sections of the standard AIRAH DA07 for input assumptions, and new failure criteria included based on a mould index of 3. Part H6—Energy efficiency H6O1 Amended to expand the energy efficiency Objectives of Part H6. H6F1 Amended to expand the energy efficiency Functional Statement of Part H6. H6P1 Amended to include quantified requirements for the thermal performance of a building. H6P2 Amended to include quantified requirements for the energy used by a building’s domestic services. H6V2 Amended to align with changes in Section 13 of the ABCB Housing Provisions and added detailed schedules for calculating heating and cooling loads. NCC 2022 Volume Two - Building Code of Australia (1 May 2023) Page 24  Preface Reference Changes and Commentary H6V3 Amended to include new ventilation requirements when an air change rate of less than 5m2/m3/hr at 50 Pa reference pressure is achieved. Specification 42 Amended to consolidate the requirements when using house energy rating software and added the new requirement for net equivalent energy usage. Specification 44 A new specification has been inserted and contains the methods of calculating heating load limits, cooling load limits and thermal load limits for Performance Requirements H6P1 of Volume Two and J1P2 of Volume One. Part H7—Ancillary provisions and additional construction requirements H7P5 Amended and now contains quantified level of performance for design and construction of buildings in bushfire prone areas. H7P6 Amended and now contains quantified level of performance for design and construction of private bushfire shelters. Part H8—Livable housing design H8 A new Part has been inserted containing the Livable housing design requirements. This includes new Objectives, Functional Statements, Performance Requirement and Deemed-to-Satisfy Provisions. Schedule 1—Definitions Schedule 1 Schedule 1 has been amended as part of the initiative to improve readability of the NCC. Schedule 1 – Definitions includes Abbreviations, Symbols and Glossary. States & Territory Appendices (formerly located in Schedule 1) have been incorporated into Schedule 3 to Schedule 11. Abbreviations Acrylic conformal coating (ACC) has been added. Abbreviations Acrylic latex (ACL) has been added. Abbreviations Australian Institute of Refrigeration, Air conditioning and Heating (AIRAH) has been added. Abbreviations American National Standards Institute (ANSI) has been added. Abbreviations American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) has been added. Abbreviations National Standard of Canada (CAN) has been added. Abbreviations Chartered Institution of Building Services Engineer (CIBSE) has been added. Abbreviations Flame zone (FZ) has been added. Abbreviations Greenhouse and Energy Minimum Standards (GEMS) has been added. Abbreviations Hot dip galvanising (HDG) has been added. Abbreviations Inorganic zinc silicate (IZS) has been added. Abbreviations NATA has been amended to include reference to Australia. Abbreviations National Sanitation Foundation (NSF) has been added. Abbreviations Polyurethane (PUR) has been added. Symbols µg/N.s has been added. NCC 2022 Volume Two - Building Code of Australia (1 May 2023) Page 25  Preface Reference Changes and Commentary Symbols f’c has been added. Symbols f’y has been added. Symbols G has been added. Symbols N/m has been added. Symbols Q has been added. Symbols ULS has been added. Glossary A defined term, ‘Above ground rainwater tank’, has been added. Glossary A defined term, ‘Annual exceedance probability’, has been added as a consequence of amendments to Part 7.4 Gutters and downpipes of the ABCB Housing Provisions. Glossary A defined term, ‘Assumed cooling thermostat set point’ has been added as a consequence of quantification in J1P2 and H6P1. Glossary A defined term, ‘Average recurrence interval’, has been deleted as a consequence of amendments to Part 7.4 Gutters and downpipes of the ABCB Housing Provisions. Glossary A defined term, ‘Bond breaker’, has been added as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions. Glossary A defined term, ‘Building complexity criteria’, has been added. Glossary A defined term, ‘Buried rainwater tank’, has been added as a consequence of amendments to Specification 41 of Volume Three. Glossary A defined term, ‘Cooling degree hours’ has been added as a consequence of quantification in J1P2 and H6P1. Glossary A defined term, ‘Daily outdoor temperature range’ has been added as a consequence of quantification in J1P2 and H6P1. Glossary A defined term, ‘Dehumidification gram hours’, has been added as a consequence of quantification in J1P2 and H6P1. Glossary A defined term, ‘Design bushfire’, has been added as a consequence of amendments to Part G5. Glossary The defined term, ‘Domestic services’, has been amended to include on-site renewable energy equipment as a result of quantification in J1P3 and H6P2. Glossary A defined term, ‘Drainage flange’, has been added as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions. Glossary A defined term, ‘Drainage riser’, has been added as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions. Glossary A defined term, ‘Efficacy’, has been added as a consequence of including quantified Performance Requirement H3P2 for automatic warning for occupants. Glossary A defined term, ‘Energy value’, has been added as a consequence of quantification in J1P3 and H6P2. NCC 2022 Volume Two - Building Code of Australia (1 May 2023) Page 26  Preface Reference Changes and Commentary Glossary A defined term, ‘Engaged pier’, has been added as a consequence of amendments to Section 5 of the ABCB Housing Provisions. Glossary A defined term, ‘Fire actions’, has been added as a consequence of amendments to Part G5. Glossary The defined term, ‘Flashing’, has been amended to clarify perimeter and vertical flashings as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions. Glossary The defined term, ‘Floor area’, for Volume One, has been amended on account of new defined term ‘Volume’. Glossary A defined term, ‘Floor waste’, has been added as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions. Glossary The defined term, ‘Glazing’, has been amended as a consequence of the updates to the energy efficiency Deemed-to-Satisfy provisions for Class 2 buildings. Glossary A defined term, ‘Heating degree hours’, has been added as a consequence of quantification in J1P2 and H6P1. Glossary A defined term, ‘Hob’, has been added as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions. Glossary A defined term ‘Irrigation system’, has been added as a consequence of amendments to S41C2 in Volume Three. Glossary A defined term, ‘Lateral support’, has been added as a consequence of amendments to Part 5.3 of the ABCB Housing Provisions. Glossary A defined term, ‘Main water heater’ has been added as a consequence of including new whole-of-home energy efficiency requirements. Glossary A defined term, ‘Main space conditioning’ has been added as a consequence of including new whole-of-home energy efficiency requirements. Glossary A defined term, ‘Maximum retained water level’, has been added as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions. Glossary A defined term, ‘Membrane’, has been added as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions. Glossary The defined term, ‘NABERS Energy for Offices’ has been amended to be ‘NABERS Energy’ to reflect its use for multiple building classifications. Glossary The defined term, ‘Performance-based design brief’ has been amended for clarity. Glossary The defined term, ‘Point of connection’, has been amended for clarity. Glossary A defined term, ‘Preformed shower base’, has been added as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions. Glossary A defined term, ‘Primary insulation layer’, has been added as a consequence of amendments to condensation management provisions. NCC 2022 Volume Two - Building Code of Australia (1 May 2023) Page 27  Preface Reference Changes and Commentary Glossary The defined term, ‘Rainwater harvesting system’, has been amended to ‘Rainwater service’ and ‘Rainwater storage’ as a consequence of amendments to Part B6 of Volume Three. Glossary The defined term ‘Reference building’ has been amended to remove reference to Thermal comfort levels and as a consequence of the introduction of J1V5. Glossary A defined term, ‘Reliability’, has been added as a consequence of including quantified Performance Requirements for automatic warning for occupants. Glossary A defined term, ‘Screed’, has been added as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions. Glossary The defined term, ‘Shower area’, has been amended to clarify enclosed and unenclosed shower areas as a consequence of amendments to