Building Performance - End of transition period
End of transition period for “Good Ground” definition change
Kia ora koutou,
In November 2019, a change was made to the definition of ‘good ground’ within the B1 Acceptable Solution B1/AS1 to prevent it from being used on liquefaction-prone ground. The change to B1/AS1 directs those building on liquefaction-prone ground to select appropriate foundations for new structures. . We had allowed a transition period of two years starting from November 2019 meaning this change comes into effect from 29 November 2021.
To help councils, engineers and developers implement the changes MBIE developed some information to help compliance. This included;
· A summary for the assessment of liquefaction vulnerability at regional scale in accordance with the MBIE/MfE guidance (2017).
This Information will help councils, BCAs, engineers, architects and designers across New Zealand understand the 'good ground' change, assist mapping liquefaction-prone-ground in their region and support consistent design of resilient foundations when the changes come into effect at the end of this month.