Roof Operations- by Craig Reed.pdf

• Phases of Fire
• Mushrooming
STEADY STATE
– Smoke and gases are heated.
– If confined to a room or building, they will rise
to the uppermost level.
– Cooler air is displaced down towards the fire,
providing oxygen and sustaining combustion.
– As circulation occurs, heated smoke and gases
build internal pressure that continue to rise
and spread laterally.