Fire & Smoke Rating is F Rating?
Fire Ratings have been often considered as F rating, which is true
in the UL world. But people often confuse Fire rating with the smoke
rating. While F is a Fire rating, smoke ratings are evaluated by a
different test procedure and awarded L rating post-compliance.
Hence for Fire & smoke rating, the ideal way to understand is by
understanding it as a separate rating: F rating for Fire & L rating for
the smoke.
(Fig 2.13)
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