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803.1.1 Interior Wall and Ceiling Finish Materials
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Interior wall and ceiling finish materials shall be classified in accordance with ASTM E84 or UL 723. Such interior finish materials shall be grouped in the following classes in accordance with their flame spread and smoke-developed indexes.
| Class A: | = | Flame spread index 0-25; smoke-developed index 0-450. |
| Class B: | = | Flame spread index 26-75; smoke-developed index 0-450. |
| Class C: | = | Flame spread index 76-200; smoke-developed index 0-450. |
Exception:
Materials tested in accordance with Section 803.1.2.
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