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803.1.1.1 Classification of Flame Spread Indices
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Such interior finish materials shall be grouped in the following flame spread classes in accordance with their flame spread index.
Class A: Flame spread 0—25.
Class B: Flame spread 26—75.
Class C: Flame spread 76—200.
Class A: Flame spread 0—25.
Class B: Flame spread 26—75.
Class C: Flame spread 76—200.
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