If a decorative material has an FSI of 28 and an SDI of 200, to which class does it belong?

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Multiple Choice

If a decorative material has an FSI of 28 and an SDI of 200, to which class does it belong?

This checks how decorative materials are classified using flame-spread and smoke-developed indices. A material with a flame-spread index up to 25 is Class A, but this one has 28, so it doesn’t fit the top class. The next class covers flame-spread values from 26 up to 75, and as long as the smoke-developed index stays within the allowed range (the usual limit being 450 or less), it qualifies for that class. With an SDI of 200, well within that limit, the material meets the criteria for the second class. If the flame-spread or smoke indices exceeded the maximum thresholds, it would be not classifiable. So, this decorative material belongs to Class B.

This checks how decorative materials are classified using flame-spread and smoke-developed indices. A material with a flame-spread index up to 25 is Class A, but this one has 28, so it doesn’t fit the top class. The next class covers flame-spread values from 26 up to 75, and as long as the smoke-developed index stays within the allowed range (the usual limit being 450 or less), it qualifies for that class. With an SDI of 200, well within that limit, the material meets the criteria for the second class. If the flame-spread or smoke indices exceeded the maximum thresholds, it would be not classifiable. So, this decorative material belongs to Class B.

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