KOROK® Fire-Rated Wall Systems, including penetrations for services such as ducting, plumbing, and electrical, are suitable for use in a wide range of buildings and environments throughout New Zealand. These systems are designed and tested to maintain their fire resistance rating when penetrated, provided that appropriate penetration sealing systems are used in accordance with KOROK® specifications and installation details.

The NZBC sets out both the legal minimum sound transmission between tenancies (Clause G6) and minimum levels of fire resistance (Clauses C3 and C6). The KOROK Intertenancy Systems Manual provides guidance on the specification and construction of systems that will both meet and exceed those minimum levels. However, designers should consider the comfort of occupants when selecting a system that will satisfy the occupants' expectations when using the space rather than the minimum required by law.

NZBC:

• Clause B1: Structure — The KOROK Systems meet the requirements for loads arising from self-weight, earthquake, wind, impact and creep and shrinkage
• Clause B2: Durability — Under normal conditions of dry internal use KOROK Intertenancy Systems have a serviceable life in excess of 50 years and satisfy the requirements of NZBC Clause B2 Durability
• Clauses C3: Fire Affecting Areas Beyond the Source — KOROK Intertenancy Systems can be used to provide passive fire protection in accordance with the requirements of NZBC Clause 3: Spread of Fire
• Clause C6: Structural Stability —Compliance with (NZBC) Clause C6 'Structural Stability'. In order to satisfy the requirements of the New Zealand Building Code (clause 6) relating to Structural Stability designers must ensure that KOROK elements are supported by primary elements that have at least the same fire rating as the KOROK system that is used
  Where the primary elements supporting the KOROK system are outside the fire cell, there is no requirement to apply the same FRR as the KOROK system. Notwithstanding, post fire stability requirements of the NZBC must also be satisfied
• Clause G6: Airborne and Impact Sound — KOROK Intertenancy Systems, both meet and exceed the minimum requirements outlined in NZBC Clause G6. Consideration should be given to both the minimum requirements and the comfort of occupants

KOROK wall systems have been successfully used in New Zealand construction projects across a range of sectors, including commercial, healthcare, education, residential, and public infrastructure. The systems have a proven track record of delivering fire, acoustic, and durability performance when installed in accordance with KOROK requirements. 

Fire Stopping Guidance Documents

At KOROK®, we understand that ensuring fire safety goes beyond the wall system itself – it’s also about how penetrations and services are detailed. That’s why we’ve collaborated with leading experts in passive fire protection to develop a suite of manuals that provide fully tested, NZBC-compliant solutions for penetrations in KOROK® fire-rated wall systems.

Each manual has been developed in partnership with industry specialists and contains tested configurations, installation guidance, and compliance references, making it easier for designers, engineers, and contractors to select the right firestop solutions.

Our firestop manuals, developed with industry partners, provide tested and NZBC-compliant solutions for service penetrations in KOROK® fire-rated wall systems.