Decision on hollow-core floors. Outcome of consultation - Building Code update 2022.
- 2022 Building Code update - Decision on hollow-core floors.
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- Ministry of Business, Innovation and Employment
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- Decision Document
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MBIE is removing the deemed to comply pathway in B1/VM1 for the design of the supports for hollow-core floor systems. MBIE believes removing this deemed to comply solution from B1/VM1 will minimise the chance of poorly designed systems being specified in new building work.
It will take time to revise the technical documentation and build awareness of the change. Therefore, the amended Verification Method B1/VM1 will be published along with other documents in November 2023. This change for hollow-core floor systems will take immediate effect when published – there will be no additional transition period. MBIE is announcing this decision prior to the publication of the revised verification method to provide certainty and direction to the sector.
In the interim period prior to November 2023, structural engineers looking to use these types of floors or provide advice to building owners should review the advice on hollow-core floors issued by Engineering New Zealand, the Structural Engineering Society New Zealand, and the New Zealand Society of Earthquake Engineering.
Advice on hollow-core floors - sesoc.org.nz