Building on ground with liquefaction potential
- Valid from
- Information provider
- Ministry of Business, Innovation and Employment
- Information type
- Section 175 guidance
You need an engineer to work out whether you need to build foundations that provide better performance than set out in the current standard, NZS 3604:2011 (including the modifications set out in B1/AS1 and explained in this guidance).
A territorial authority or regional council may have already identified ground with a potential for liquefaction and/or lateral spread. It may be noted on the LIM (Land Information Memorandum) for the property.
If you are a building consent authority, and the property is situated in an identified liquefaction hazard zone on a regional hazard map, you should advise building designers and owners to seek advice from a chartered professional engineer.