b'The roof structure was enclosed at the back of the test frame with oriented strand board (OSB) thatincorporated a 100-mm x 100-mm vent opening located at the base of the roof and a 200-mm x 200-mm glass vision panel. 2.2Orientation The roof specimen was tested with the exterior face of the roof exposed to the radiant heat source. 2.3Crib 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 belowthe ridge cap detail mid span as shown in Photograph 4 (Appendix A). 2.4Conditioning The roofing part of the specimen did not include exposed timber elements. Thespecimenconstructionwasdeliveredon10thOctober2023andstoredunderstandard laboratory atmospheric conditions until the test date. 2.5Level of radiant heat exposure The level of radiant heat exposure selected by the test sponsor was Very high - 29 kW/m. 2.6Selection,constructionandinstallationofthespecimenandthe supporting construction The construction was organised by the sponsor, CSIRO was not involved in the selection of the materials.3Documentation The following documents were supplied or referenced by the sponsor as a complete description of the specimen and should be read in conjunction with this report: Drawings reference Delta Trim TPC-RA01, sheets 1 and 2, Revision D, dated 30 May 2023, by Delta Panels. Drawings for various components 200 Beam, DeltaCool Wall, Delta Trim-TPC Opp Cut LHS, Delta Trim-TPC Opp Cut, Delta Trim-TPC Opp Cut RH, TCP-R001 to TCP-R015, TCP-R006-RH, TCP-R008-LH, by Delta Panels.No confidential information about the test specimen has been submitted to CSIRO Infrastructure Technologies FSZ 2411 | page7 of 40'