Seismic Assessment Auckland
Worried about how an existing building may perform during an earthquake? A seismic assessment can help you understand the building’s current structural performance and whether further investigation or strengthening may be needed.
Bazaraa Consulting Engineers provides seismic and structural engineering services for existing buildings across Auckland and throughout New Zealand. We assess each building based on its age, construction, structural system, condition, and available information.
Whether you are planning a renovation, redevelopment, property purchase, or potential strengthening work, we can help you understand the engineering considerations and determine the appropriate next steps.
Understanding Your Building’s Seismic Performance
A seismic assessment looks at how an existing building may respond to earthquake forces. It is different from a general building inspection because the focus is specifically on structural performance.
Depending on the project, our consulting engineers may review existing drawings and calculations, inspect relevant structural elements, and carry out engineering analysis to identify potential areas of concern.
The assessment can give property owners and other project stakeholders clearer information for making decisions about future work.
Seismic Assessment Services
The right assessment depends on the building and why the assessment is required.
Our services may include:
- Review of existing structural drawings and information
- Site inspections and structural observations
- Assessment of structural elements and load paths
- Identification of potential seismic vulnerabilities
- Engineering calculations and structural analysis
- Initial Seismic Assessment (ISA)
- Detailed Seismic Assessment (DSA)
- Recommendations for further investigation
- Seismic strengthening design where required
We can discuss your building and project requirements first, then establish an appropriate engineering scope.
Initial Seismic Assessment (ISA)
An Initial Seismic Assessment provides an early understanding of an existing building’s potential seismic performance.
It can be useful for property owners who want to identify whether a building may require further investigation before committing to a more detailed assessment.
An ISA is not necessarily a complete assessment of every structural component. If the initial findings indicate that more information is needed, a Detailed Seismic Assessment or further engineering investigation may be recommended.
Detailed Seismic Assessment (DSA)
A Detailed Seismic Assessment provides a more comprehensive review of an existing building.
Depending on the project, this may involve:
- Reviewing available building documentation
- Inspecting the existing structure
- Assessing structural elements
- Carrying out engineering calculations and analysis
- Identifying structural weaknesses
- Considering potential strengthening options
The scope is tailored to the individual building rather than applying the same process to every property.
Seismic Assessment and NBS
Seismic performance is often discussed in relation to the New Building Standard (NBS).
An assessment may express the estimated seismic capacity of an existing building as a percentage of a comparable new building. However, the NBS percentage should not be considered on its own.
The building’s characteristics, assessment methodology, assumptions, and engineering findings all need to be considered when understanding the result.
Our engineers can explain the assessment findings in practical terms so property owners and other stakeholders can understand what they mean for the building.
When Might You Need a Seismic Assessment?
A seismic assessment may be useful when you are:
- Buying or selling an existing property
- Planning alterations or redevelopment
- Considering a major renovation
- Managing an older commercial building
- Investigating potential earthquake-related concerns
- Planning seismic strengthening
- Reviewing the structural performance of an existing building
It can provide useful engineering information before important property or project decisions are made.
Seismic Strengthening Design
If an assessment identifies structural weaknesses, seismic strengthening may be considered.
There is no single strengthening solution that works for every building. The appropriate design can depend on the existing structural system, foundations, materials, building layout, architectural requirements and the way the proposed work will interact with the existing structure.
Bazaraa Consulting Engineers can develop project-specific strengthening solutions where required, with consideration given to the practical requirements of the building and the wider project.
Working With Your Project Team
Seismic engineering is often one part of a larger building project. Our consulting engineers can coordinate with other professionals involved in the project, including:
- Architects
- Project managers
- Client representatives
- Business development managers
- Contractors and other consultants
This helps ensure the structural engineering work fits with the wider project requirements, rather than being considered in isolation.
Where applicable, our design work can also address compliance with the New Zealand Building Code and relevant engineering requirements.
Seismic Engineering Across New Zealand
Although we provide seismic assessment services in Auckland, Bazaraa Consulting Engineers supports projects throughout New Zealand.
The requirements of an assessment can vary depending on the building, its location, construction, age, and intended use. We take these factors into account when establishing the appropriate engineering approach.
Whether you are dealing with an existing residential, commercial or other building, we can discuss the project and help determine what level of seismic assessment may be appropriate.
How Much Does a Seismic Assessment Cost?
There is no fixed price for every seismic assessment. The cost depends on the building and the level of engineering work required.
Factors can include:
- Building size and complexity
- Age and structural system
- Availability of drawings and previous engineering information
- Site inspection requirements
- Level of assessment
- Structural analysis and calculations
- Additional investigation
- Strengthening design requirements
The best way to understand the likely scope and cost is to discuss your building and the reason for the assessment with our consulting engineers.
Frequently Asked Questions
A seismic assessment is an engineering review of an existing building’s potential performance during an earthquake. It considers the building’s structural system, materials, condition, and other relevant factors.
An Initial Seismic Assessment (ISA) is a preliminary review that provides an early indication of a building’s potential seismic performance and whether further investigation may be appropriate.
A Detailed Seismic Assessment (DSA) is a more comprehensive engineering assessment. It may include detailed document reviews, site investigation, structural analysis, and engineering calculations.
NBS refers to the New Building Standard. Seismic assessments may use an NBS percentage to describe the estimated seismic capacity of an existing building compared with a comparable new building. The percentage should be considered alongside the wider engineering assessment.
No. The need for strengthening depends on the individual building and the findings of the engineering assessment. Further investigation or strengthening may or may not be required.
Yes. Bazaraa Consulting Engineers provides structural and seismic engineering services for projects across New Zealand, not only Auckland.
Need Help With a Seismic Assessment?
If you own, manage, are purchasing, or are developing an existing building and want to understand its earthquake performance, Bazaraa Consulting Engineers can help.
Talk to our consulting engineers about your building, the type of assessment you may need, and the next steps for your project.
Contact Bazaraa Consulting Engineers to discuss your seismic assessment requirements.
