b'Orientation The roof specimen was tested with the exterior face of the roof exposed to the radiant heat source. Crib size The crib size selected by the test sponsor for the relevant BAL level was Class AA, as specified in Table 3.2 of Section 3.8 of AS 3959:2018. Four cribs were used for the test, crib #1 was positioned in the roof gutter adjacent to the ridge edge of the valley gutter, while Cribs #2 and 3 were positioned in the valley gutter 700-mm and 1200-mm from the drip edge. Crib # 4 was positioned just below the ridge cap detail mid span. Performance observed in respect of Clause 14.4 of AS 1530.8.1-2018 criteria: Performance CriteriaTime to failure (min)Position of failure A gap from the fire exposed face to the non-fireNo Failure- exposed face greater than 3mm Sustained flaming for 10 seconds on the non-fire sideNo failure- Flaming on the fire-exposed side at the end of the 60No failure- minutes test period Radiant heat flux 365mm from the non-fire sideNot Applicable- exceeding 15-kW/m Mean and maximum temperature rises greater thanNo failure- 140 K and 180 K Radiant heat flux 250mm from the specimen, greaterNo failure- than 3-kW/m between 20 minutes and 60 minutes Mean and maximum temperature of internal faces exceeding 250C and 300C respectively between 20Not Applicable- minutes and 60 minutes after the commencement of the test Crib classAAPeak heat flux29 kW/mFor the purpose of building regulations in Australia, the test specimen achieved a Bushfire Attack Level (BAL) of AA29.FCO-3545 Page 11 of 16 Copyright CSIRO 2024 This report may only be reproduced in full. Alteration of this report without written authorisation from CSIRO is forbidden.'