Whether you live or are planning to build in a bushfire prone area, or simply want to increase the bushfire performance afforded to your home, COLORBOND® steel and TRUECORE® steel can be a key part of your bushfire design solution.

TRUECORE® steel and COLORBOND® steel won’t ignite or contribute to the spread of fire and may be used wherever a non-combustible material is required. Utilising this benefit, together with an appropriate NASH bushfire design solution, enables resilient and robust homes to be built cost-effectively through reducing the amount of materials required in construction whilst still meeting the NCC bushfire performance requirements.

Roofing, walling, gutters and downpipes made from COLORBOND® steel may be used as part of a compliant system in bushfire prone areas, including in the most extreme, BAL-FZ (Bushfire Attack Level – Flame Zone) as defined in AS 3959:2018.

In BAL-FZ “there is an extremely high risk of ember attack and burning debris ignited by windborne embers, and a likelihood of exposure to an extreme level of radiant heat and direct exposure to flames from the fire front.” (AS 3959:2018).

The National Association of Steel Framed Housing (NASH) is an industry body that develops Standards for low-rise steel framing. The NASH Standard for steel framed construction in Bushfire Areas sets out acceptable construction details for residential and low-rise buildings in bushfire prone areas.

The Standard incorporates two simple and cost-effective solutions based on Bushfire Attack Levels of BAL-12.5 to BAL-FZ as defined in AS 3959:2018. The NASH Bushfire Standard is referenced in the National Construction Code (NCC) as a Deemed-to-Satisfy (DTS) solution for the design and construction of steel framed homes in bushfire areas in all States* and Territories.

Construction details to the NASH Bushfire Standard are available for a range of COLORBOND® steel and ZINCALUME® steel clad residential roofing and walling systems in conjunction with framing made from TRUECORE® steel. These construction details are contained in BlueScope’s design guide “BlueScope Steel Product Solutions for Bushfire Areas – NASH Bushfire Standard”. This design guide has been developed to provide assistance to homeowners, builders and designers who are looking to build or re-build homes in bushfire-prone areas BAL12.5 to BAL-FZ.

The details in this design guide summarise simple and cost-effective solutions to comply with the NCC using the NASH Bushfire Standard. For more information on BlueScope Product Solutions for Bushfire areas, please visit: bluescopesteel.com.au/tools-and-resources bushfire-design.

For complete details and requirements of the NASH Standard, refer to: nash.asn.au

*Note that additional requirements may apply. COLORBOND®, ZINCALUME®, TRUECORE® and BLUESCOPE® are registered trademarks of BlueScope Steel Limited. © 2021 BlueScope Steel Limited ABN 16 000 011 058.

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