A Unified Step Forward: Strengthening Seismic Resilience in Building Design

Two significant industry documents have recently been released, marking a transformative step forward in how New Zealand approaches the seismic performance of non-structural elements. The AWCI Code of Practice for Suspended Ceilings and the Building Innovation Partnership (BIP) Code of Practice for the Seismic Performance of Non-Structural Elements (NSE CoP) aim to provide clarity, consistency, and innovation for practitioners across the construction and engineering sectors.

These documents reflect a collective effort to address seismic challenges, improve compliance, and enhance safety. Below, we explore the highlights of these updates, focusing on the AWCI CoP while connecting its importance to the broader scope of the NSE CoP.

The AWCI Code of Practice: A Comprehensive Guide for Suspended Ceilings

The AWCI Code of Practice (CoP), developed by the Association of Wall and Ceiling Industries (AWCI), is a targeted guide focusing specifically on suspended ceiling systems. It aims to simplify compliance, align practices with updated standards, and address lessons learned from past seismic events, such as the Christchurch earthquakes.

Key Features of the AWCI CoP

1. Alignment with Current Standards
   The AWCI CoP integrates updates from standards such as NZS 1170.5, particularly Section 8, which deals with non-structural seismic elements. The guide ensures that practitioners are aligned with importance levels, part classifications, and updated methodologies that reflect modern seismic requirements.
2. Innovations in Seismic Design
   • Simplified Roles and Responsibilities: New flowcharts clearly distinguish between the roles of designers and engineers, reducing confusion during the design and installation phases.
   • Flexible Restraint Options: Expanded methods for “fixed and floating” installation and hybrid solutions provide cost-effective alternatives to back-bracing, making seismic compliance more accessible.
3. Expanded Suspension Systems
   • Inclusion of advanced suspension types, such as 38mm T-faced grids, accommodates a broader range of ceiling systems, including plasterboard and timber.
   • Practical solutions for supporting fixtures within ceiling tiles enhance both compliance and design flexibility.
4. Specialised Applications
   The guide also addresses unique scenarios, such as ceilings in harsh environments (e.g., swimming pools) and layered acoustic/fire-rated systems. These additions reflect the complexity of modern buildings and the need for tailored solutions.
5. Clarity for Stakeholders
   • The introduction of PS3 producer statements for installers ensures accountability and compliance.
   • Improved guidance on structural suitability emphasises the importance of the building’s capacity to support seismic loads.

The AWCI CoP is not just a technical document but an educational tool designed for contractors, engineers, council officials, and specialists. Its electronic format allows for regular updates, ensuring it remains a living document that evolves with industry needs.

The BIP Code of Practice: A Holistic Framework for Non-Structural Elements

Complementing the AWCI CoP is the BIP Code of Practice for the Seismic Performance of Non-Structural Elements (NSE CoP). Developed by the Building Innovation Partnership (BIP), this document addresses a broader range of non-structural elements, including ducting, façades, mechanical plant, and suspended ceilings.

Key Contributions of the BIP NSE CoP

1. Holistic Design Philosophy
   The NSE CoP promotes the integration of non-structural elements into early-stage building design, ensuring they are not treated as an afterthought.
2. Proposed Damage Control Limit State (DCLS)
   This new concept aims to bridge the gap between serviceability and ultimate limit states by focusing on minimising repair costs for non-structural elements post-earthquake.
3. Technical Guidance and Tools
   The document includes testing protocols, performance characterisation, and a framework for verification of seismic performance, making it a valuable resource for designers and engineers.
4. Collaboration and Expertise
   The BIP NSE CoP is the result of a collaborative effort involving researchers, engineers, and industry stakeholders. Its alignment with the AWCI CoP ensures consistency across guidelines, terminology, and methodologies.

Bridging the Two Codes

Together, these two documents form a robust framework for the seismic performance of non-structural elements. While the AWCI CoP provides targeted solutions for suspended ceilings, the BIP NSE CoP offers a broader context, enabling practitioners to address interconnected challenges in building design.

By adopting these codes, professionals across the construction and engineering sectors can:

• Ensure compliance with updated seismic standards.
• Enhance the safety and resilience of both structural and non-structural elements.
• Reduce costs associated with seismic damage and downtime.

Moving Forward

Both codes are now available electronically, offering easy access for industry professionals. As these documents gain traction, organisations like AWCI and BIP are focusing on education and outreach, from webinars to conference presentations, to ensure widespread understanding and adoption.

The release of these codes marks a significant milestone in the journey toward safer and more resilient buildings. By leveraging these tools, we can not only meet today’s seismic challenges but also prepare for the demands of the future.

For more information or to access the codes, visit the AWCI and BIP websites. Together, let’s build a stronger, safer industry.