Fire Engineering Assessment, Revision 01 DeltaCool, DeltaSecrectFix, DeltaTrim at 100 mm and 75 mm Fire Performance, Project No. 25367 25367-SFE-FEA-01-Delta Panel Fire Performance Page 25 DeltaTrim™ Mineral Wool 75 mm Figure 4-11 For the proposed panels to achieve the fire performance of the 100 mm DeltaCool™ panel with a mineral wool core, the joints and corner detailing must be in accordance with Figure 4-4 to Figure 4-9. As seen in Figure 4-11, charring occurs at the joints of the test assembly and are the crucial areas to the fire performance of the tested material. By maintaining the joint and corner detailing identical to the tested specimen (i.e., the fire- retardant sealant, the steel angle, etc), it is expected that only the altering of the panel to the proposed panels will affect the fire performance. The cross section of DeltaSecretFix™ is very similar to DeltaCool™, both are a flat panels with the difference being the joint connects two of the panels together. This arrangement does not significantly increase the amount of adhesive and paint on the DeltaSecretFix™. Thus, the 100 mm thick DeltaSecretFix™ is expected to perform the same as the 100 mm DeltaCool™ panel and would be expected to achieve a Group Number of 1 if tested to AS ISO 9705:2003(R2016) and classified against AS 5637.1:2015. Similarly for DeltaTrim™, the corrugations will increase the adhesive and paint content compared to the DeltaCool™ panel. However, as discussed above and seen in Figure 4-13, the minor increase in the adhesive or paint is not expected to change the panels reaction to fire in the order of magnitude to achieve an HRR of 1 MW. Therefore, 100 mm thick DeltaTrim™ panel with a mineral wool core is expected to have a similar performance to 100 mm DeltaCool™ panel and achieve a Group Number of 1 if tested to AS ISO 9705:2003(R2016) and classified against AS 5637.1:2015. The reduced thickness within the DeltaCool™, DeltaSecretFix™, or DeltaTrim™ would not alter the adhesive or paint content as the mineral wool core will be reduced, and the steel skin thickness will be maintained. The mineral wool is not deemed to be combustible (Appendix E – Certification of Test for Mineral Wool) although mineral wool generally contains an organic binder which itself is combustible. Reducing the core thickness in effect reduces the combustible component within the core of the panel, albeit to a minor degree. If tested, the reduction in the mineral wool thickness would not be expected to have any appreciable impact on the fire hazard and would certainly not be expected to contribute to the fire hazard.
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