Fire assessment report R1.0 
Page 12 of 21 
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All Rights Reserved. T1124 PAC 
influence the reaction to fire performance of the specimen. Steel is inherently non-combustible and does not 
contribute to the fuel load or heat release rate during fire exposure in a negative way. Profile changes are for 
aesthetic purposes and do not alter the thermal or combustion characteristics of the system. Consequently, 
regardless of the profile, the steel skin continues to act as a barrier, ensuring that the mineral wool remains 
shielded and that the overall system exhibits limited contribution to fire growth. Based on the above, the 
proposed steel skin profiles are positively assessed.  
6.6 
Delta Trim-MW 
It is proposed to assess DeltaTrim panel based on the tested DeltaCool panel. The Delta Trim panel 
remains identical to tested Delta Trim except for the variation in the steel skin profile. The impact of steel 
skin profile variation was discussed in section 6.5 and concluded to not impact the reaction to fire 
performance. Based on the above, the proposed Delta Trim panel is positively assessed.  
6.7 
Assessment outcome 
This assessment demonstrates that the tested specimen with proposed variation is capable of achieving 
group number classification as listed in Table 7 in accordance with AS 5637.1:2015. 
Table 7 Assessment outcome 
Specimen  
Thickness 
Profile  
Group number  
SMOGRARC (in 
m2/s2 × 1000) 
DeltaCool-MW 
+ 
75 mm 
+ 
100 mm 
+ 
Smooth 
+ 
Ribbed 
+ 
MicroRibbed 
+ 
5V 
+ 
Single V 
1 
< 100 
Delta Trim-MW 
100 mm 
Ribbed 
Notes- 
+ 
The panels must be fixed as tested in RTF252619 R1.0.  
+ 
The panels are assessed as group number 1-S in accordance with C/VM2 – Verification Method: Framework for 
Fire Safety Design.  
 
 
 

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