noun
General Slang
rollover
· noun · firefighter
Flame rolling across the ceiling as unburnt fire gases ignite overhead.
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Definitions
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When the hot gas layer at ceiling level hits its ignition temperature and flames go rolling across the ceiling, ahead of the main fire. It's a warning sign — flashover is coming if you don't cool the gases now.
“Saw rollover above the doorway and hit the ceiling with a quick pencil of water before it tipped into flashover.”
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rollover In A Sentence
Saw rollover above the doorway and hit the ceiling with a quick pencil of water before it tipped into flashover.
Origin & Usage
Fire-service term distinguishing ceiling-level flame propagation from full compartment flashover.
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