The initial Seismic Assessment procedures were developed in 2006 by the New Zealand Society of Earthquake Engineering and updated in 2013 to reflect experience with its application and as a result of the Canterbury Earthquakes.
It is a tool to assign a percentage of New Building Standard (%NBS) score and associated grade to a building as part of an initial Seismic Assessment of existing buildings to determine the overall risk. This tool enables territorial authorities, building owners and managers to employ an engineer to review their building for earthquake risk.
The review assumes the building has been designed and built in accordance with the building standard and good practice current at the time. In the first stage of the review (ISA) some buildings or issues may be flagged as being problematic or as a potentially critical structural weakness and will need further investigation and evaluation resulting in a Detailed Seismic Assessment being recommended.
If your building has a percentage under 33% NBS, the building is classed as being earthquake prone and having risks associated.
Insurance companies and bank lenders like your building to be at least 67% NBS. This relates to a Grade B building, which is not earthquake prone.
Building Evaluation Process
We can help you with each step.