A corridor finish is specified as IBC Class B interior wall finish. Which flame-spread index range corresponds to Class B?
Correct Answer
B) 26-75, the Class B range
IBC interior finish classification defines Class B as flame-spread index 26 through 75. Other choices correspond to Class A, Class C, or outside the Class A/B/C classification.
Why This Is the Correct Answer
IBC interior finish classification defines Class B as flame-spread index 26 through 75. Other choices correspond to Class A, Class C, or outside the Class A/B/C classification.
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