Parakiore Recreation and Sports Centre stands as one of Aotearoa New Zealand’s most ambitious community and high-performance sporting developments – a 32,000m² hub designed to support everyday recreation through to elite national and international events. Designed by Warren and Mahoney in association with Peddle Thorp and MJMA, and delivered on behalf of Crown Infrastructure Delivery for Christchurch City Council, the project required building systems that could perform at the highest level – structurally, acoustically, and in fire protection. KOROK was proud to contribute to this nationally significant development, supplying 300m² of KOROK® 78mm Galv Panel for key internal fire and acoustic separations within the complex.
The Challenge: Performance Across Scale, Safety & Sound
A building of this scale brings significant fire-safety and acoustic requirements. With large wet and dry zones, interconnected public spaces, high-performance training areas, and major event facilities, the project team required internal wall systems that delivered:
High fire resistance for critical separation zones
Reliable acoustic performance to manage noise transfer between pools, courts, fitness areas, and specialist spaces
Lightweight construction to integrate efficiently into the steel-driven structural design
Durability and compliance within a major civic facility expected to host two million visitors annually
This combination of acoustic control, fire protection, and constructability made KOROK’s systems an ideal fit.
KOROK® Solution
KOROK supplied 300m² of KOROK® 78mm Galv Panels, providing a robust fire- and acoustic-rated solution for internal separations within the facility. Why the 78mm Galv Panel Was Chosen:
High-Performance Fire Rating. Manufactured from zinc-coated steel shells conforming to AS/NZS1397:2001 with a Z275 coating, the panels offer reliable and tested fire protection essential for a public facility of this scale.
Excellent Acoustic Control. The aerated concrete core delivers strong airborne sound reduction — critical in a building that includes hydroslides, aquatic halls, gym spaces, and nine active courts.
Lightweight & Efficient to Install. At just 10.2kg per lineal metre, the 78mm panel is easily handled on a complex construction site, allowing rapid installation and smoother coordination with other trades.
Durability for Heavy-Use Environments.Designed to stand up to the demands of high-traffic public recreation centres and high-performance training areas.
The KOROK system contributed to meeting the project’s stringent fire-safety requirements while supporting the acoustic conditions necessary to create a functional and enjoyable environment across vastly different activity zones.
KOROK’s contribution helped ensure safe, durable, and high-performing internal environments within one of New Zealand’s most significant sport and recreation developments. The Parakiore facility will host community users, school groups, local clubs, and elite athletes alike – supported by dependable fire and acoustic separation systems designed to perform over decades of intensive use. KOROK is proud to support a project that not only enhances Christchurch’s sporting infrastructure but also delivers long-term social, economic, and recreational benefit for the region.
KOROK® has 2-way fire-rated wall systems for fire separation of Scissor Stairs or any Stairs.
KOROK® Scissor Stair Systems are proprietary, non-loadbearing, two-way fire-rated wall systems designed to provide fire and acoustic separation between independent stair flights within scissor stair configurations or other stair arrangements.
The system utilises 78mm thick interlocking KOROK® panels installed between two independent stairstringers to form a continuous fire-resisting barrier. Panels may be oriented vertically, horizontally, or in combination to suit stair geometry and construction sequencing requirements.
KOROK® Scissor Stair Systems are constructed using 78mm thick panels comprising roll-formed galvanised or colour steel outer shells with an aerated concrete core and interlocking tongue-and-groove profiles, forming a continuous, tightly sealed wall plane that reduces the risk of acoustic leakage between stair flights. The system is non-combustible and provides two-way fire resistancewhen exposed from either side.In fire conditions:
Horizontal fire resistance is achieved through a quadrilateral fire-resistant section formed between the two independent stairs
Vertical fire resistance is achieved through the wall-to-stair stringer boundary condition
KOROK® Scissor Stair Systems provide independently tested Fire Resistance Ratings up to –/120/120 and –/60/60 depending on configuration, while the 78mm interlocking panels deliver acoustic performance up to STC 76, meeting or exceeding NZBC Clause G6 requirements through their aerated concrete core and tightly sealed joint geometry.
Code Compliance Highlights
Clause B1 – Structure: Meets requirements for loads arising from self-weight, earthquake, wind, impact, creep and shrinkage
Clause B2 – Durability: Under normal dry internal conditions, serviceable life in excess of 50 years
Clause C3 – Fire Affecting Areas Beyond the Source: Provides passive fire protection to control spread of fire
Clause C6 – Structural Stability: Designers must ensure supporting primary elements achieve at least the same fire rating as the KOROK® system when required by fire cell configuration
Clause F2 – Hazardous Building Materials: System does not present a health hazard
Clause G6 – Airborne and Impact Sound: Meets and exceeds minimum airborne sound requirements
Key Performance Ratings
Proven Fire Separation: Provides up to –/120/120 FRR in scissor stair configurations, with independently tested performance
High Acoustic Performance: STC ratings up to 76, supporting high-performance multi-level and commercial buildings
Non-Combustible Construction: Steel outer shell with aerated concrete core.
Lightweight yet Structurally Robust: High stiffness-to-weight ratio with defined ULS and SLS capacities.
Design Flexibility: Panels may be installed vertically, horizontally, or in combination, enabling adaptation to varying stair geometries
Durability: Service life exceeding 50 years under normal dry internal conditions
KOROK Panels at Work in Raglan: Quieting the Glass Recycling Hub
We’ve just wrapped up a project at the Xtreme Zero Waste recycling center in Raglan, where we installed a “box” using our fire and acoustic panels around their glass recycling facility. The goal? To keep the noise down from the glass recycling process. The crew at Xtreme Zero Waste couldn’t be happier, saying, “The box looks awesome and works well.” It’s great to see our panels doing their job, making the space quieter and more comfortable for everyone involved. We’re stoked to have been part of this project and to see our panels making a difference right here in Raglan.
Costco Auckland, Standing Strong with KOROK® Wall Systems
Costco, the world’s second-largest retailer, opened its first New Zealand store in October 2022 at 2 Gunton Drive, Westgate, Auckland. Part of the expansive Westgate Shopping Centre, this new 15,000m² retail space features overhead parking for over 800 vehicles and includes essential services like a fuel station, tyre centre, food court, optometrist, and hearing aid services. This store is a key addition to the rapidly growing Northwest Auckland community, built on a challenging site during the COVID-19 pandemic. As a solid structure made of steel and concrete, Costco Auckland stands as a durable retail hub that incorporates the high-performance KOROK® wall system.
KOROK® supplied 78mm fire-rated acoustic panels (GEN 2) for several key areas of the Costco Auckland project, delivering fast installation and exceptional quality. Our system provided pre-finished internal walls, ensuring a sleek and clean aesthetic, combined with robust fire safety and acoustic insulation.
Key Areas Where KOROK® Panels Were Used:
Separation Walls: Between the entry and main shop (7.2m high, ColorSteel Titania finish)
Lift Surrounds: ColorSteel Titania panels installed around the main lifts
Fire Escape Stairwells: Galvanized panels left visible for fire compliance
Why KOROK® for Warehouses and Retail?
KOROK® wall systems are designed for large-scale environments like warehouses and bulk retail stores. Our strong, secure separation walls offer:
Superior Fire Resistance: Compliant with all fire safety regulations
Noise Insulation: High acoustic performance for noise control in busy environments
Fast Installation: Single-panel system simplifies and speeds up construction
Aesthetic Quality: Pre-finished panels provide a clean, professional look
Costco Auckland’s successful construction is a testament to KOROK®’s ability to meet the needs of high-demand retail spaces. Our fire-rated acoustic panels delivered both safety and efficiency, ensuring a sturdy, high-performing structure that aligns with Costco’s global standards.
High-Performing and Lightweight Panels for Superior Building Solutions
The 78mm KOROK® panels are engineered to provide exceptional performance in both fire and acoustic applications. These panels are roll-formed from high-quality COLORSTEEL® steel strips, with the steel conforming to the rigorous AS/NZS1397:2001 standard.
The combination of steel shells and an aerated concrete core ensures outstanding durability and functionality. Weighing approximately 10.2kg per lineal metre, these panels offer a lightweight solution that does not compromise on strength or safety.
Applications of 78mm KOROK® Colour Panels
Our 78mm KOROK® colour panels are versatile and suitable for various building applications, including:
KOROK® External Wall Systems: Ensuring robust protection with excellent thermal, acoustic, and fire-rated properties.
Lightweight Construction: Simplifies installation and reduces structural load requirements.
Durability: Engineered to withstand demanding conditions.
Efficiency: Panels are pre-finished and easy to install, reducing construction time and costs.
Transition to COLORSTEEL® MAXAM™
In our commitment to innovation and sustainability, we are transitioning to the advanced COLORSTEEL® MAXAM™, replacing the previous COLORSTEEL® ENDURA® and COLORSTEEL® MAXX® ranges. This transition represents a significant technological advancement, enhancing the performance and longevity of our wall systems. COLORSTEEL® MAXAM™ is designed to offer superior resistance to New Zealand’s diverse environmental conditions, making it an ideal choice for a wide range of applications.
Engineered Fire and Acoustic Systems for Industrial and Commercial Spaces
KOROK® Warehouse and Retail Systems are high-performance, non-loadbearing internal wall systems designed to provide secure fire separation and acoustic control in industrial, warehouse, bulk retail, and intertenancy environments.
The system consists of interlocking steel-faced panels with an aerated concrete core, engineered for certified fire resistance, acoustic attenuation, structural reliability, and long-term durability. Panels can be installed vertically or horizontally and are suitable for both single-wall and twin-wall configurations. The systems have been developed in accordance with recognised Australian and New Zealand Standards and are substantiated through BRANZ testing and appraisal(Appraisal No. 559), ensuring verified and compliant performance.
How the System Works
KOROK® panels are roll-formed from zinc-coated steel strips and encapsulate a lightweight aerated concrete core. The interlocking tongue-and-groove profile forms a continuous sealed barrier that enhances both fire integrity and acoustic isolation.
System performance is achieved through the combined effect of panel mass and composite action, the engineered interlocking joint design, and a tested fastening and support methodology. Optional linings and cavity configurations can also be incorporated to meet specific Fire Resistance Rating (FRR) and Sound Transmission Class (STC) requirements.
Systems are non-loadbearing and must be supported by primary structural elements designed in accordance with NZBC structural requirements. Only genuine, tested KOROK® panels and proprietary components guarantee certified system performance. Substituting alternative products may compromise fire and acoustic ratings and cannot be supported or certified.
The internal side lined with 1 layer 19mm GIB Fyreline® or acceptable GIB® alternatives or 2 layers 10mm GIB Fyreline® or acceptable GIB® alternatives.
Longrun profiled steel cladding system as selected.
The internal side lined with 1 layer 19mm GIB Fyreline® or acceptable GIB® alternatives or 2 layers 10mm GIB Fyreline® or acceptable GIB® alternatives. Longrun profiled steel cladding system as selected
1 layer 10mm GIB® Standard plasterboard or equivalent each side
Acoustic insulation must be either Autex GreenStuf SW90 or Pink Batts R 2.2 each side.
KOROK® metal fire flashing is installed to the top C-track.
KOROK® metal KIT flashing is installed to horizontal joints.
90mm steel or timber frame each side
86mm overall. Framing not to touch KOROK® panel or fire flashing
KOROK® metal fire flashing is installed to the top C-track. KOROK® metal KIT flashing is installed to horizontal joints.
1 layer 10mm GIB® Standard plasterboard or equivalent each side
Acoustic insulation must be either Autex GreenStuf SW90 or Pink Batts R 2.2 each side.
KOROK® metal fire flashing is installed to the top C-track.
KOROK® metal KIT flashing is installed to horizontal joints.
90mm steel or timber frame each side
80mm overall. Framing not to touch KOROK® panel or fire flashing
KOROK® metal fire flashing is installed to the top C-track. KOROK® metal KIT flashing is installed to horizontal joints.
KOROK® metal fire flashing is installed to the top C-track OR 13 mm GIB Fyreline® or equivalent x 120 mm strip with sealant is fixed at 250 mm centres top and bottom, using 6g x 32 mm drywall screws.
