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(a) All materials used for interior wall and ceiling finish and for interior trim shall be classified in accordance with flame spread characteristics into the following classifications:
Classification | Flame Spread Rating | Smoke Developed |
Class 1 | 0 to 25 | 200 |
Class 2 | 26 to 75 | 450 |
Class 3 | 76 to 200 | 450 |
(b) The classification of any specific material shall be determined in accordance with test procedure as provided in Section 15-12-320.
(c) All materials used as floor covering shall be classified in accordance with the critical radiant flux characteristics as follows:
Class A interior floor finish: Critical radiant flux of 0.45 watts per square centimeter or higher.
Class B interior floor finish: Critical radiant flux between 0.22 watts per square centimeter and 0.44 watts per square centimeter.
Wherever the use of Class B interior floor finish is required, Class A interior floor finish material is permitted.
(d) The classification of specific floor covering materials shall be in accordance with test procedures as provided for in Section 15-12-344.
(Prior code § 62-9.3; Amend Coun. J. 6-27-90, p. 17610)