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NCC 2022 - New compliance options for masonry construction

Are you using cavity brick or unreinforced single leaf masonry in your next project? NCC 2022 now provides an additional compliance option rather than sole reliance on using the corresponding Australian Standards for masonry construction.

The National Construction Code (NCC) 2022 Volume Two will see the re-introduction of acceptable construction practices for cavity brick and unreinforced single leaf masonry that can be used to satisfy the Deemed-to-Satisfy Solution. 

These are located in Section 5, Part 5.3 and Part 5.4 of the new ABCB Housing Provisions. 

HIA had been advocating for the return of these acceptable construction practices since the provisions were removed from BCA 2011 and it is encouraging to see their reintroduction into the NCC as alternate DTS compliance option.

This new compliance option doesn’t override the use of DTS solutions applying AS 4773 masonry for small buildings or AS 3700 masonry structures, rather it just provides a simple DTS self contained compliance option within the NCC itself.

The use of the new DTS masonry construction provisions though must meet specific limitations that are set out in the Deemed to Satisfy provisions in Volume Two i.e. it is not applicable for all soil types or building geometries.  

An outline of the limitations are listed below.

Deemed to Satisfy Provisions

Part H1D5 Masonry - sets out the Deemed to Satisfy Provisions that will satisfy the Performance Requirement H1P1. Parts H1D5(2)(c) and H1D5(3)(c) are the respective Deemed to Satisfy provisions specific to cavity brick and single skin masonry.

Clauses 5.3.1 and 5.4.1 of the ABCB Housing provisions specify that the application of these acceptable construction methods are subject to limitations set out in Part H1D5 of NCC Volume Two.  

Limitations 

In general the limitations in using the cavity brickwork and the single skin masonry provisions include:

  • the building is located in an area with a design wind speed of not more than N3
  • the building site soil classification is A, S or M in accordance with AS 2870
  • the building is not constructed in an alpine area; and 
  • the building is one for which no specific earthquake design requirements apply. 

Can’t meet the limitations

As indicated above the limitations will restrict the type of building to be constructed due to soil classification restraints and wind classification. 

Where these limitations cannot be met, then the masonry will need to be designed and constructed using the Australian Standards AS 3700 Masonry Structures or AS 4773.1 and 4773.2 Masonry for small buildings.

 

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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