In a designated bushfire prone area, a Class 1 building and any associated Class 10a building or deck must be designed and built to lower the chance of ignition from a design bushfire with an annual exceedance probability not more than 1 in 50 years, take account of the assessed duration and intensity of the bushfire's fire actions, prevent internal ignition of the building and contents, and keep the building structurally sound for the duration of the design bushfire. Verification Method H7V2 accepts an ignition probability not above 10% assessed by event tree analysis of ember attack, burning debris, radiant heat and direct flame for the building's Importance Level (1 in 500 or 1 in 50 annual probability for Importance Level 2 complex or simple analysis; 1 in 2000 or 1 in 200 for a Class 10c defend-in-place building at Importance Level 4), allowing for variations in fire weather, vegetation, distance, topography, exposure and flame behaviour, and for construction and maintenance reliability. Deemed-to-Satisfy route: H7D4, construction in accordance with AS 3959 or the NASH Standard for Steel Framed Construction in Bushfire Areas at the site's bushfire attack level. New South Wales applies AS 3959 and the NASH Standard as amended by Planning for Bush Fire Protection and excluding BAL-FZ, subject to development consent conditions and bush fire safety authorities; Queensland exempts certain low-threat vegetation (Group F rainforest excluding wet sclerophyll forest, mangroves and grasslands under 300 mm); South Australia fixes the BAL by the Planning and Design Code risk area; Tasmania replaces H7P5 (see the State variation leaf).
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.