A Smarter Approach to Fire-Rated Ceilings & Bulkheads

KOROK® Ceiling & Bulkhead Systems provide a smarter, more efficient approach to fire-rated ceiling construction for commercial, industrial, and infrastructure projects. Utilising KOROK® 78mm panels, these systems are designed to simplify fire continuity while enabling fast underside installation with Fire Resistance Ratings of up to -/120/120.

Developed to address the practical challenges faced on modern construction sites, KOROK® systems are ideal for service-heavy environments, restricted-access ceiling spaces, and complex construction sequencing. The lightweight panel design helps reduce installation complexity, minimise disruption to other trades, and improve overall site efficiency.

Traditional Fire-Rated Ceiling Construction Can Be Complex

Conventional fire-rated ceiling and bulkhead systems can create unnecessary challenges around ceiling plenums, service coordination, access limitations, and installation sequencing. In many cases, traditional systems require additional linings to be installed from above, increasing labour, programme time, and coordination requirements. KOROK® Ceiling & Bulkhead Systems simplify this process.

Designed specifically for installation from the underside, KOROK® systems reduce reliance on roof-space access while supporting efficient programme sequencing for new builds, retrofit projects, and staged construction works.

The symmetrical profile of the KOROK® 78mm panel allows seamless integration with KOROK® fire-rated wall systems, concrete/masonry, and structural steel elements. By utilising compatible KOROK® wall and ceiling systems together, fire continuity can be maintained without overcomplicating details or requiring excessive additional ceiling linings.

All KOROK® panel tasting has been carried out at nationally accredited laboratories to AS1530: Part 4, providing designers, engineers, and contractors with confidence in system performance and compliance. Keep it simple with lightweight, code-compliant KOROK® systems designed to work together to meet demanding fire and acoustic performance requirements.

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What Are Deflection Head Details?

Deflection head details are specialized components used in wall and partition systems to accommodate vertical or horizontal movement in a building’s structure. They are typically placed at the top of walls, allowing the structure to expand, contract, or shift without compromising the wall’s integrity or performance.

This movement can be caused by various factors, such as dead loads, live loads, thermal expansion, or seismic activity. At KOROK Building Systems, our deflection head solutions are designed to provide the flexibility and stability needed in high-performance wall systems.

KOROK deflection head details:

• Maintain Structural Integrity: Designed to allow movement in walls without damaging the structure, these details help prevent cracking or separation in response to building movement.
• Ensure Fire and Acoustic Performance: KOROK deflection heads are rigorously tested to retain fire resistance and acoustic ratings, even with movement, maintaining protection in all conditions.
• Seismic Readiness: In New Zealand, where seismic activity can impact building structures, our deflection head designs are engineered to absorb and adjust to seismic forces, supporting safe and resilient structures.

Dead and live loads can cause significant deflection in some structures. KOROK® can provide deflection C-track details where deflection loadings are considered.

Whether used in commercial or residential projects, KOROK’s deflection head details meet the highest industry standards, offering a reliable solution for builders, architects, and contractors who prioritize safety, performance, and durability.