DeltaDualCore™ Panel Awning Systems Revision 1-12 21 Based on these results and with reference to the tested facings and substrates, the tested indices are independent of the substrate to which the coated metallic facings are bonded. The results are indicative only of the fire performance of the coated metallic facings during the early stages of fire development, before involvement of the substrate. As such, the test results are independent of the thickness of the core material used (substrate) to which the coated metallic facings are bonded. Although no AS1530.3 test has been undertaken specifically on the DeltaDualCore™ panel, based on the above deduction from the available AS1530.3 tests, it is reasonable to extrapolate the results to be applied to the DeltaDualCore™ panel consisting of coated metallic facings (complying with Table 3-1) bonded to a substrate consisting of a composite material comprising EPS and mineral wool bonded together along a stepped seam (as shown in Figure 3-2). Furthermore, the AS1530.3 results in tests 3 and 4 (Table 3-4) indicate that the DeltaOrb™ system and the DeltaTrim™ system achieves identical early fire hazard performance. The AS3959 results in test 5 (Table 3-4) indicate that the DeltaOrb™ and DeltaTrim™ systems achieve identical performance in terms of the achieved Bushfire Attack Level (BAL) rating. Based on these results, the differing profiles of the DeltaOrb™ and DeltaTrim™ systems do not appear to have any significant effect on the achieved fire performance of the panels. As such, the DeltaOrb™ and DeltaTrim™ panels may be used interchangeably and the outcomes of this assessment remain applicable to both panel types. The AS1530.1 test provides determination of combustibility for each material independently. The mineral wool has been tested to AS1530.1 (test 1 in Table 3-4) and is deemed not combustible. Furthermore, NCC H3D2(1)(e) permits pre-finished metal sheeting having a combustible surface finish not exceeding 1 mm with a spread of flame index not greater than 0 to be used wherever a non-combustible material is required. As such, the coated metallic facings used in the DeltaDualCore™ system comply with NCC H3D2(1)(e) and therefore may be regarded as non-combustible under the DtS provisions of the NCC (no further AS1530.1 test is necessary). This assessment is based on the assumption that EPS is combustible and has the thermal characteristics outlined in Table 3-5. The values given in Table 3-5 were obtained through bench-scale testing that was undertaken by the University of Queensland (UQ) and is available in the UQ cladding material library as sample INS04. Table 3-5. Key thermal properties of EPS in the University of Queensland Cladding Material Library under sample ID INS04. Criteria Symbol Unit INS04 (99% EPS Core) Gross heat of combustion 𝜟𝑯𝒄 𝒌𝑱 𝒈 39.20 Critical heat flux for ignition 𝒒̇ 𝒄𝒓 ′′ 𝒌𝑾 𝒎𝟐 20.50 Ignition temperature 𝑻𝒊𝒈 ℃ 434 Peak HRRPUA (average) at: 𝒒̇ 𝒑′′ 𝒌𝑾 𝒎𝟐 At Heat flux of 35 kW/m2 228.06 At Heat flux of 50 kW/m2 291.11 At Heat flux of 60 kW/m2 332.23 Total energy released (average) at: 𝑸𝒕 𝑴𝑱 𝒎𝟐 At Heat flux of 35 kW/m2 28.43 At Heat flux of 50 kW/m2 28.22 At Heat flux of 60 kW/m2 24.52
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