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NCC 2022 - Substantial changes to Volume Two layout

Can’t find the Deemed-to-Satisfy (DTS) Provisions in Volume Two? NCC 2022 has been totally restructured & renumbered and means you will need familarise yourself with the new layout.

One of the substantive changes for NCC 2022 includes a complete re-numbering and re-structuring for each and every clause in Volume Two as well as the inclusion of a new document called ‘ABCB Housing Provisions Standard’.

Whilst, technical this change doesn’t affect compliance under the NCC in that it will maintain the code being performance based and allow:

  • Performance Solutions
  • Deemed-to-Satisfy Solutions and
  • A combination approach

Further that under the Deemed-to-Satisfy Provisions, it still maintains two alternate compliance paths being – 

  • following prescriptive solutions written into the NCC in the Housing Provisions (previously referred to Acceptable Construction Practice); or
  • the use of referenced Australian Standard (previously referred to Acceptable Construction Manuals).

Though the change in re-numbering and re-structuring of both Volumes One and Two will have a major impact on where you find and how you reference the relevant information for your projects.

To help overcome transitional issues the new NCC includes an ‘archive number’ to the right of every clause title in brackets to indicate what the existing NCC 2019 clause was in correspondence to the new NCC 2022 clause number.

So why the change?

As part of the ABCB commitment to delivering a NCC that is user-friendly and modern, the changes cover three broad categories:

  1. Consistence volume structure
  2. Section, Part, Type, Clause (SPTC) referencing system
  3. Web content accessibility.

Volume Two currently under NCC 2019 and past editions, uses a very different referencing system to that of Volumes One and Three. NCC 2022 seeks to align the three Volumes of the NCC as much as is possible.

How does it work?

The ABCB were of the view that the most logical way to ensure the code has a single and consistent referencing system throughout, was to align the Volume Two referencing system with that of Volumes One and Three.

To do this the current Section H – Special Use Buildings in Volume One will be moved to Section I, which is currently empty having been removed several editions ago.

This enabled Volume Two to be assigned ‘Section H’, with its seven Parts numbered from H1 to H7. The use of the letter H is also a helpful reminder for ‘Housing / Houses / Homes’, reflecting Volume Two’s focus.

In Section H it contains the relevant Volume Two Performance Requirements, Verification Methods, Applications and limitations clauses for the DTS Provisions to satisfy the corresponding Performance Requirements.

Through Section H it ‘calls up’ or references the ABCB Provisions Standard and in turn the ABCB Livable Housing Design Standard.

So what this means is that Volume Two encompasses:

  • Section A (Governing Requirements),
  • Section H, and the Schedules – which contains the Performance Requirements, Verification Methods, Applications and limitations clauses for the DTS Provisions, Definitions, Scheduled of Referenced Documents and State and Territory Variations.
  • The new ABCB Housing Provisions Standard contain the DTS Provisions.
  • The ABCB Livable Housing Design Standard.

 

An example of this application:

NCC 2022 Volume Two – Performance Requirements – Stair construction

H5D1 Deemed-to-Satisfy Provisions

  1. Where a Deemed-to-Satisfy Solution is proposed, Performance Requirements H5P1 and H5P2 are satisfied by complying with H5D2 and H5D3.
  2. Where a Performance Solution is proposed, the relevant Performance Requirements must be determined in accordance with A2G2(3) and A2G2(4) as applicable.

H5D2 Stairway and ramp construction

Compliance with Part 11.2 of the ABCB Housing Provisions satisfies Performance Requirement H5P1 for stairway and ramp construction.

H5D3 Barriers and handrails

Housing Provision Standards – Stairway construction DTS Provisions

11.2.2 Stairway construction

  1. A stairway must be designed to take loading forces in accordance with AS/NZS 1170.1 and must have:

      a. not more than 18 and not less than 2 risers in each flight; and
      b. Goings (G), risers (R) and a slope relationship quantity (2R + G) in accordance with Table 11.2.2a, except as permitted by (2) and (3); and
      c. constant goings and risers throughout each flight, except as permitted by (3) and (4), and the dimensions of goings (G) and risers (R) in accordance with (1), (2) and (3) are considered constant if the variation between:

        i. adjacent risers, or between adjacent goings, is no greater than 5mm; and
        ii. the largest and smallest riser within a flight, or the largest and smallest going within a flight, does not exceed 10mm;

Questions & Answers on the new layout

Book
Does the renumbering mean my product certificate and reports are no longer valid?
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No

NCC 2022 includes a note to Part A5G3 which states:

“Current documentary evidence, such as a certificate or report, containing references to NCC 2019 provisions remains valid despite amended provision references in NCC 2022, subject to technical requirements remaining the same between editions”.

Meaning if you have a current test report or certificate that references existing NCC 2019 clauses, provided those clauses haven’t had other NCC 2022 changes affecting their application, the certificate or test report would remain current and compliant despite the clause renumbering.

It is expected though over time that manufacturers and suppliers will be updating their product compliance documentation to take account of the new numbering system.

Book
Does this affect state and territory variations?
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No

Existing state and territory variations that written into the NCC are included in the new format, unless the State or Territory have added/deleted or amended specific clauses for inclusions into the NCC 2022.

For those variations that may be written into state building regulations or Acts or similar documents external to the NCC i.e. Queensland Development Code (QDC). Whilst some of these may refer to clause numbering based on NCC 2019, the variations would still be relevant but regard for the new numbering into which clauses they are altering or varying is important.

The archive number’ to the right of every clause of previous clause number will greatly assist with this.

Book
Does this mean that other documents such as standards, guides, specifications that refer to existing NCC numbering are now redundant?
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No

Similar to variations and test reports – if a standard refers to a clause number reflecting NCC 2019, that provisions would be unaffected by NCC 2022 change and would still be relevant but regard for the new numbering into which clauses they are altering or varying is important.

The archive number’ to the right of every clause of previous clause number will greatly assist with this.

Book
What does the changes mean for the previous Acceptable Construction Practice (ACP) & Acceptable Construction Manual (ACM) compliance paths?
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The exiting compliance paths will not be affected.

However, some standards have been added/updated as part of NCC 2022 and therefore regard for the changes in the specific standards is important.

Book
Given, the Housing Provisions contain the majority of the DTS Provisions, can I just use the Housing Provisions and ignore Volume Two itself.
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No

Volume Two and the Housing Provisions must be used in conjunction. Volume Two includes important information in the Section A Governing Requirements, Section H in which sets out the Performance Requirements to which the DTS Provisions applies and the application and limitation clauses for the DTS Provisions.

Further Volume Two itself includes the definitions, scheduled of Referenced Documents and State and Territory Variations.

To find out more, contact HIA Building and Planning Services.

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NCC 2022 - Information sessions


 

HIA will run information sessions on the proposed changes to the NCC in August and September.

Register your interest in attending one of these sessions.

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