draft curtain

curtain board, draft curtain

A substantial noncombustible curtain, hung tightly against a roof or ceiling along the perimeter of a special-hazard area; acts as a partition in directing heat and smoke within the curtained area toward vents and preventing the spread of fire.
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References in periodicals archive ?
- Specifics regarding fire sprinklers, smoke vents, draft curtains, and hose rack.
What effect do automatic roof heat and smoke vents and draft curtains have on the performance of automatic sprinkler systems?