Scissor Stairs – Fire and Acoustic Rated Protection
KOROK® has 2-way fire-rated wall systems for fire separation of Scissor Stairs or any Stairs.
Our innovative KOROK® Scissor Stair wall systems are BRANZ-tested and Warringtonfire-assessed, ensuring compliance with New Zealand’s fire safety standards. These systems are rated up to a Fire Resistance Rating (FRR) of -/120/120, offering robust protection for critical building areas. KOROK® Scissor Stairs Systems cater to most common scenarios requiring fire resistance in stair configurations. These walls are constructed using 78mm thick, horizontally and/or vertically oriented KOROK® panels, designed to fit seamlessly between two independent stair stringers in scissor stairs configurations. The systems feature self-supporting, non-load-bearing walls that can be built using horizontally or vertically stacked panels, or a combination of both. This flexibility ensures adaptability to a wide range of building designs.
Key Benefits of KOROK® Scissor Stairs Fire-Rated Wall Systems:
Two-way fire protection: Rated up to FRR -/120/120 for comprehensive fire separation.
No height limitations: KOROK® walls can be installed without restrictions on wall height, in both horizontal and vertical configurations.
Structural simplicity: No additional structural support required beyond attachment to stair landings and stair stringers.
Fast, efficient installation: Lightweight interlocking panels make installation faster and more cost-effective compared to conventional systems.
KOROK® Scissor Stairs wall systems combine fire safety, acoustic performance, and cost efficiency, making them the ideal choice for builders and developers.
Compliance with the New Zealand Building Code
KOROK® Scissor Stair Systems meet the stringent requirements of Clause C of the New Zealand Building Code (NZBC). They comply with the normative requirements for fire resistance performance as outlined in New Zealand’s acceptable solutions.
Fire Resistance Ratings (FRR)
The fire resistance ratings of KOROK® Scissor Stair Systems reach up to FRR -/120/120, depending on the span of the panels and the components selected.
Horizontal Fire Resistance: Achieved by the quadrilateral fire-resistant section between the two independent stairs.
Vertical Fire Resistance: Provided by the wall-to-stair stringer angle at the boundary connections.
For detailed configurations, refer to the technical specifications in the KOROK® Scissor Stair Systems wall type tables.
KOROK® was involved in the construction of a dual-branded hotel in Auckland’s Central Business Precinct. Located at the corner of Albert and Wyndham Streets, this project, led by Icon NZ, began in 2019 and was completed in December 2021. The VOCO-HIE development is a 38-story building, standing approximately 135 meters tall, making it one of New Zealand’s tallest structures. The building offers expansive views across Waitemata Harbour and Mount Eden, featuring a modern design.
A 4-story glazed podium with separate entries for both hotels.
Guest services such as an all-day restaurant, bar, fitness center, and retail spaces.
294 Holiday Inn Express rooms on the lower floors.
200 VOCO Hotel rooms on the upper floors.
The VOCO brand, chosen by global hotel operator IHG, emphasizes sustainability through initiatives like recycling plastic bottles for bedding and using honey from onsite bees. The Auckland VOCO hotel continues these practices, alongside the ‘Me Time’ concept focusing on premium beds, superior showers, user-friendly technology, and innovative lighting.
KOROK®’s Contribution
KOROK® provided high-performance fire and acoustic wall systems for the VOCO-HIE development. Key highlights include:
Fire Protection: KOROK® systems offer up to a 2-hour fire rating, ensuring strong fire safety.
Acoustic Performance: The systems exceed the minimum STC 55 rating for hotels, achieving an STC 63 rating, ideal for ensuring a quiet environment for guests.
Design and Installation: KOROK®’s interlocking panels simplified and sped up installation, reducing labor costs and construction time. The panels’ clip-together design allowed for easy installation by a small crew, with comprehensive installation guides and on-site training provided.
Space Efficiency: The small footprint of KOROK® panels maximized usable floor space, offering developers greater flexibility in building design and planning.
Environmental Commitment
KOROK® panels were manufactured in New Zealand from locally sourced materials and were custom-made to minimize waste. They are fully recyclable and reusable, aligning with the sustainable ethos of the VOCO brand.
Collaboration and Innovation
KOROK® and Icon NZ collaborated closely to devise solutions for lift shafts and staircases, reflecting a commitment to quality and innovation in construction.
KOROK® was proud to contribute to the VOCO-HIE dual-branded hotel project, providing high-performance fire and acoustic wall systems that supported the building’s design and sustainability goals. This project showcased KOROK®’s dedication to quality and innovative building solutions.
KOROK Systems used in this project
Intertenancy Apartment Systems
At KOROK® we have developed a new series of KIR KOROK® Intertenancy Residential Walls that remove the need for linings in the ceiling plenum whilst maintaining fire resistance and acoustic control performance.
In 2022, Dunedin’s Loan and Mercantile building was transformed into the Suzanne Lund Community Loft Apartments, a notable social housing development. This project, driven by Russell Lund of Lund South Ltd, showcases the practical application of 78mm KOROK panels Gen 2.
Russell & Suzanne Lund’s proactive approach was essential in bringing this project to fruition. their decision to use KOROK panels ensured that the building met necessary safety and performance standards. The Lund’s leadership in design and development has set a positive example for integrating heritage preservation with modern housing needs.
Social Housing Impact
The Suzanne Lund Community Loft Apartments provide 30 social housing units, managed by the Salvation Army. This includes 28 one-bedroom units, one two-bedroom unit, and one three-bedroom unit, along with communal facilities such as a support office, community room, courtyard, drying room, and bike storage. This development addresses the need for social housing in Dunedin, offering a supportive environment for low-income tenants.
Flexibility of KOROK Panels
KOROK was chosen for its flexibility in meeting the project’s requirements. lightweight nature and strong performance were key in adapting the heritage structure to modern standards without compromising its historical integrity. This flexibility makes KOROK panels a trusted choice for diverse construction projects. The 78mm KOROK panels Gen 2, used extensively in this project, are known for their high performance and lightweight design. These fire and acoustic-rated panels are made from zinc-coated steel strips, meeting AS/NZS1397:2001 standards. KOROK panels offer excellent fire resistance and acoustic performance, making them suitable for various construction needs.
The use of 78mm KOROK panels Gen 2 in the Suzanne Lund Community Loft Apartments highlights their effectiveness in demanding construction projects. This case study demonstrates KOROK’s role in transforming a heritage building into a valuable social housing resource and emphasizes Russell & Suzanne Lund’s proactive leadership in creating community-focused housing solutions.
KOROK Systems used in this project
Intertenancy Apartment Systems
At KOROK® we have developed a new series of KIR KOROK® Intertenancy Residential Walls that remove the need for linings in the ceiling plenum whilst maintaining fire resistance and acoustic control performance.
Hobsonville Point: Enhancing Fire and Acoustic Protection with KOROK® Intertenancy Systems
Bringing Kiwi Ingenuity to Hobsonville Point Homes
Here at KOROK®, we’re stoked to have been part of the transformation of the old Hobsonville airbase into a new community. Our innovative KOROK KIR Intertenancy Residential Walls have been key in shaping around 3000 homes across this significant slice of land, including standout spots like the Te Uru Apartments, Walter Merton Road Terraces, Nugget Avenue Terraces, and Buckley A Precinct.
Being part of the Hobsonville Point development really showcases our ability for coming up with smart solutions that tackle the real-world challenges of modern building, especially when it comes to keeping fires at bay and cutting down on noise. Traditional wall setups in flats and hotels usually lean on linings to do this job. But our KIR walls change the game by ditching the need for these linings up top, making the whole building process simpler and slicker.
Smoother Sailing in Building and Design
Our walls have made it quicker and easier to get buildings up at Hobsonville Point. That’s good news for the teams on the ground and means residents can start enjoying their new digs sooner.
Keeping Costs Down
Thanks to the technology behind our KIR panels, we’ve cut down on waste, which means saving some dollars. Those savings can help make other parts of the development even better, making the whole neighbourhood a top spot to live.
Top-Notch Fire and Sound Safety
We’ve put our walls through the wringer to make sure they’re up to scratch for fire safety and noise control. That means folks living in Hobsonville Point can sleep easy, knowing they’ve got solid protection around them.
Built Solid for Extra Peace of Mind
The sturdy design of our walls means homes are not just safe but also built to last. That’s a big plus for anyone calling Hobsonville Point home, offering a secure spot for years to come.
Committed to Excellence in Innovation and Community Building
From the lively look of the Te Uru Apartments to the tidy and thoughtful design of the Walter Merton Road Terraces and the spot-on style of Buckley A Precinct, our KIR panels have been a foundation for success, delivering the goods on fire safety and quiet living. As we look back on our role at Hobsonville Point, we’re chuffed to have delivered solutions that not only tick the boxes for what’s needed in today’s building scene but also help forge strong, safe, and green communities. Our dedication to coming up with better ways to do things will keep us at the forefront of making homes better for Kiwis everywhere.
KOROK Systems used in this project
Intertenancy Terraced Housing
In terraced housing and town houses, conventional framed wall systems rely on the internal linings for fire-resistance. Penetrating these linings potentially destroys the fire-rated barrier.
KOROK® 78mm galv panels are rollformed from zinc coated steel strips. The steel from which the shells are manufactured conforms to AS/NZS1397:2001. Steel shells have a base metal thickness of 0.4mm B.M.T. with a Z275 zinc coating. These panels have an aerated concrete core and weigh nominally 10.2kg per lineal metre.
51mm KOROK® panels are rollformed from zinc coated steel strips. The steel from which the shells are manufactured conforms to AS/NZS1397:2001. Steel shells have a base metal thickness of 0.4mm B.M.T. with a Z275 zinc coating. These panels have an aerated concrete core and weigh nominally 10.2kg per lineal metre.
KOROK® produces 51mm panel. KOROK® 51mm panel provides a -/60/60 FRR and is perfectly suited for terraced house intertenancy walls and apartment intertenancy walls. The narrower gauge allows you to keep more floor space as it isn’t taken up by walls.
Performance and Features
Fire Rating: KOROK® 51mm panels provide a fire resistance rating of -/60/60 FRR, meeting stringent safety requirements for intertenancy walls in terraced houses and apartments.
Acoustic Efficiency: Designed to reduce sound transmission, these panels ensure quieter living environments, making them an excellent choice for densely populated or high-traffic areas.
Space-Saving Design: The 51mm thickness allows for slimmer walls, helping to maximize valuable floor space without compromising structural integrity or performance.
Vertical Orientation: Panels are installed vertically and secured to timber or steel framing with aluminum brackets.
Versatility: Compatible with wall framing, insulation, and linings specified within the system appraisal, ensuring seamless integration into your building project.
Scope of Use: Appraised for all buildings of all importance levels as defined by AS/NZS 1170.
Fire and Acoustic Rated Protection for Intertenancy Apartment Systems
In multilevel buildings such as apartments and hotels, traditional framed wall systems often depend on wall linings to achieve fire resistance and effective acoustic control. However, KOROK® has designed an innovative solution: KIR KOROK® Intertenancy Residential Walls. These advanced wall systems eliminate the need for linings in the ceiling plenum while maintaining exceptional fire resistance and acoustic performance.
This breakthrough simplifies the design, detailing, and construction of intertenancy apartment walls, leading to quicker construction times, less material waste, and significant cost savings.
Key Benefits of KOROK® Intertenancy Apartment Walls:
Proven fire-rated protection and acoustic insulation for multilevel buildings.
Solid wall construction for enhanced security and long-term durability.
Explore our CAD Library to access detailed DWG files for multilevel intertenancy systems. Download the full KOROK Intertenancy Multilevel Systems Literature to learn more about our fire and acoustic rated protection.
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.
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.
