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10.2.7.1*
Carpet and carpet-like interior floor finishes shall comply with ASTM D2859, Standard Test Method for Ignition Characteristics of Finished Textile Floor Covering Materials.
10.2.7.2*
Floor coverings, other than carpet for which 10.2.2.2 establishes requirements for fire performance, shall have a minimum critical radiant flux of 0.1 W/cm2.
10.2.7.3*
Interior floor finishes shall be classified in accordance with 10.2.7.4, based on test results from NFPA 253 or ASTM E648, Standard Test Method for Critical Radiant Flux of Floor Covering Systems Using a Radiant Heat Energy Source.
10.2.7.4
Interior floor finishes shall be grouped in the classes specified in 10.2.7.4.1 and 10.2.7.4.2 in accordance with the critical radiant flux requirements.
10.2.7.4.1 Class I Interior Floor Finish
Class I interior floor finish shall have a critical radiant flux of not less than 0.45 W/cm2, as determined by the test described in 10.2.7.3.
10.2.7.4.2 Class II Interior Floor Finish
Class II interior floor finish shall have a critical radiant flux of not less than 0.22 W/cm2, but less than 0.45 W/cm2, as determined by the test described in 10.2.7.3.
10.2.7.5
Wherever the use of Class II interior floor finish is required, Class I interior floor finish shall be permitted.

Related Code Sections

10.2.7.2* Interior Finish, Contents, and Furnishings,
Floor coverings, other than carpet for which 10.2.2.2 establishes requirements for fire performance, shall have a minimum critical radiant flux ...
804.3 Interior Finishes, Testing and Identification
Interior floor finish and floor covering materials shall be tested by an agency in accordance with ASTM E648 or NFPA 253 and identified by a hang tag ...