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Fire-Rated Systems Using Scyon Stria Cladding and RAB Board

by Singh Kamboj

With the changes to the NZBC regarding fire protection becoming mandatory on 10 April, I've been fielding lots of inquiries about fire-rated systems using Scyon Stria and RAB Board.

singh kamboj Singh Kamboj

Singh is a civil engineer offering experience in designing timber, steel and concrete structures. He heads James Hardie’s technical team.

Sycon Stria Cladding is an advanced lightweight cement composite which delivers superior inherent fire resistant properties. It is suitable to achieve fire resistance ratings required on the boundary walls.

RAB Board is a pre-sealed rigid air barrier which is used with Scyon Stria Cladding to achieve 30 or 60 minute fire-resistance ratings.

These fire rated systems also meet the new E2/AS1 section 9.1.4 code requirement for a rigid air barrier in extra high wind zones. The RAB Board does not require an additional layer of building paper over as per comment in E2/AS1.

The Scyon Stria Cladding fire rated system is available in two options, 30 or 60 minute.

The 30 minute fire rated system includes standard H1.2 timber frame 90 x 45mm, RAB Board installed over timber framing and then Scyon Stria Cladding installed over CLD Structural Cavity Battens.  R2.2 minimum fibreglass insulation in the wall cavity and a 10mm GIB Fyreline.

The 60 minute fire rated system includes standard H1.2 timber frame 90 x 45mm, RAB Board installed over timber framing and then Scyon Stria Cladding installed over CLD Structural Cavity Battens with James Hardie 90mm thick mineral insulation in the wall cavity and a 13mm GIB Fyreline.

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