Commercial Developers find that Interiors Specialist Advisors are needed earlier in the Design Process

For New Zealand's leading commercial interior firms, architects, and construction companies, navigating the complexities of seismic design isn't just about compliance—it's about safeguarding your projects, optimising budgets, and ensuring long-term asset value.

At Brevity Interiors, we believe in empowering our partners with the knowledge to build more resilient and efficient commercial spaces. Unlike firms that focus only on structural elements, Brevity Interiors specialises in the complex interplay of non-structural interior fit-outs and seismic resilience, offering a holistic approach that safeguards your entire project.

Beyond providing specialised seismic engineering, we're dedicated to sharing critical insights that can transform how you approach interior fit-outs in a seismically active region.

Here are key learnings to consider for your next commercial project:

Key Learnings for Resilient Commercial Interiors:

1. The Criticality of Early Seismic Integration

Don't treat seismic design as an afterthought. The costs associated with non-structural building elements for commercial developments show they have a greater asset value than the superstructure. This highlights the importance of a specialist advisor. Such an advisor should be holistically concerned with the materials, costs, and engineering behind every project.

Addressing potential vulnerabilities early allows for:

• Optimised Structural Solutions: Identifying and resolving seismic challenges at the outset allows for more elegant and integrated structural solutions, avoiding costly retrofits or compromises later in the project. Early intervention can reduce design revisions by up to 30%, preventing budget blowouts and delays that often add 20% or more to project costs.
• Reduced Rework & Delays: Early intervention significantly minimises the need for design revisions during construction, preventing budget blowouts and delays. Think of it as building a strong foundation from day one, rather than trying to reinforce it once the walls are up.
• Enhanced Design Freedom: Understanding seismic constraints early actually expands design possibilities. When you know the parameters, you can creatively innovate within them, rather than being limited by unexpected restrictions later on.

2. Understanding Non-Structural Element Vulnerabilities

While structural integrity is a given, studies show that up to 40% of earthquake damage and associated costs in commercial buildings often stems from non-structural elements. These include:

• Suspended Ceilings: These are highly susceptible to damage. Understanding the performance differences between grid systems, the importance of seismic bracing, and perimeter details is vital. Poorly engineered ceilings can detach, block exits, or bring down services.
• Internal Partitions: From lightweight plasterboard walls to heavy glazed or operable partitions, each requires specific detailing to accommodate building movement without collapsing, cracking extensively, or compromising fire cells. Designing for ductility and controlled deflection is key.
• Service Integration: How lighting, HVAC ducting, fire sprinklers, and other services are integrated into ceilings and walls dramatically impacts their seismic performance. Proper isolation, flexible connections, and independent support for heavy services are not optional; they are essential for preventing cascading failures.
• Feature Elements: Large-scale decorative features, art installations, specialised joinery, and even heavy furniture require meticulous seismic restraint design. These elements, often unique to a project, demand bespoke engineering to ensure they remain secure and don't become hazards.

3. Navigating New Zealand's Unique Regulatory Landscape

New Zealand's building code, particularly clauses relating to seismic design (e.g., B1 Structure, B2 Durability), is constantly evolving and highly specific due to our geological context.

• Stay Updated: Regularly review the latest revisions to NZS 1170.5 and relevant Acceptable Solutions/Verification Methods. What was compliant last year might have new nuances this year.
• Beyond Minimums: While compliance is the baseline, consider designing beyond minimum requirements for critical areas, especially in high-occupancy or essential facilities. This adds an extra layer of resilience and longevity.
• Documentation is Key: Thorough documentation of seismic restraint designs, calculations, and material specifications is vital for consent processes and future building modifications.

4. The Value of Collaborative Expertise

Successful seismic design for interiors isn't a solitary task; it thrives on seamless collaboration. An integrated approach, where each discipline informs the other, leads to more robust, cost-effective, and compliant outcomes:

• Bridging the Knowledge Gap: Interiors engineering specifically bridges the gap between the primary building structure and the non-structural interior fit-out. We work in tandem with architects to preserve design intent, with structural engineers to understand building deflections, and with contractors to ensure constructability.
• Shared Responsibility, Enhanced Outcomes: When all project stakeholders – architects, interior designers, structural engineers, interiors engineers, and contractors – communicate and collaborate early on seismic considerations, it leads to a more cohesive, safer, and ultimately more successful project. It fosters an environment where potential issues are identified and resolved collectively, rather than in isolation.

At Brevity Interiors, our expertise stems from deeply understanding these principles and applying them daily. By incorporating these learnings into your commercial projects, you're not just building compliant spaces; you're creating resilient, enduring environments that stand the test of time.

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