Reaction-to-fire properties for construction and finishing of multi-storey timber buildings in New Zealand

Structural Timber Innovation Company (STIC)

Originally published by the Structural Timber Innovation Company

This information sheet discusses New Zealand Building Code requirements relating to the reaction-to-fire or flame spread properties of timber used in interior floors, walls or ceilings or as external cladding. Performance requirements for the fire properties of materials used in interior floors, walls or ceilings or as external cladding are published by the Department of Building and Housing1 in NZBC Code Clause C3. The requirements also appear in the Verification Method C/VM2 and in the Acceptable Solutions C/AS1 to C/AS7 (DBH, 2012) edited to suit the scope of each of the Compliance Documents. Compliance with any of these compliance documents means guaranteed acceptance by Building Consent Authorities and compliance with the New Zealand Building Code.

Alternative Solutions can be proposed but they may be subject to negotiation with the Building Consent Authority and must be shown to meet the performance requirements of the Building Code. Given that quantitative reaction to fire performance requirements are included in the Code Clauses C3, Alternative Solutions demonstrating equivalency would be expected to be quite rare and unusual and would at least require the services of a suitably qualified fire engineer.

This information sheet discusses requirements of the Code Clause C3 only.

TDJ 22-4

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