DeltaDualCore™ Panel Awning Systems 
 
Revision 1-12 
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Figure 4-8. Typical uncontrolled apartment fire (Alam and Beever 1996). 
 
4.7.1.3 
Design Fire 3: Fire Spread from the Site Boundary to the Class 10a Structure 
The fire source feature presented by the site boundary is taken as a radiating panel with transient 
temperature following the AS1530.4 standard fire time-temperature curve which increases to over 1050°C. 
This provides a more conservative assessment than simply assessing a NCC H3V3 fire source (equivalent 
to C1V1 in NCC Volume 1) with a constant heat flux of 80 kW/m2 from the site boundary (which is 
equivalent to a radiating panel with a temperature of 817°C). 
The standard fire curve is described by the equation: 
𝑇=  345𝑙𝑜𝑔10.
8𝑡
60 + 1 + 20 
4.8 
Assessment 
4.8.1 
DtS Base Case 
NCC does not restrict the combustibility of a Class 10a structure attached to a Class 1 structure if it is 
located more than 900 mm from the site boundary. 
As such, the risk of fire spread from, or to the site boundary is mitigated to a DtS accepted level of risk (i.e. 
to the degree necessary) with a spatial separation of 900 mm regardless of ventilation conditions. 
 

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