Initial & Detailed Seismic Assessments

SEISMIC ASSESSMENT (ISA & DSA – %NBS)

The seismic assessment of existing buildings is required throughout New Zealand to identify Earthquake Prone Buildings and manage the risk in a timely manner. The assessment will be done as per the MBIE Guidelines for earthquake-prone building regulations.

Seismic assessment will identify seismic strength of the existing building as a percentage of the new building standard (%NBS). A building is an Earthquake Prone Building if the seismic rating is <34%NBS. A DSA is required if the ISA identifies the building as having a seismic rating of <34%NBS. For seismic assessment, the new building standard refers to the minimum life safety performance requirements of Building Code B1-Structure.