
367Fires
are also useful when re tests are conducted so that the test res are allowed to proceed to
ashover and beyond.
Example 12.1
Enclosures have denite eects on a re growth. e re growth rate in the enclosure is deter-
mined by the fuel load, the size of the ventilation opening, the volume of the enclosure, the ceil-
ing height, and the location of the re with respect to the walls and corners. e minimum size
of a re that can cause ashover in a given enclosure is determined by the ventilation provided
through the openings. e minimum size re that causes ashover in a compartment is given by
HRR(kW) 750
fo
=
where
A
o
is the area of op ...