BS 476-6:1989+A1:2009 specifies a method of test, theresult being expressed as a fire propagation index,that provides a comparative measure of thecontribution to the growth of fire made by anessentially flat material, composite or assembly. Itis primarily intended for the assessment of theperformance of internal wall and ceiling linings.NOTE The titles of the publications referred to in BS 476-6:1989+A1:2009 are listed on the inside back cover..Cross References:BS 476-10BS 4422-1BS 4422-2BS 4422-5BS 4947PD 6498Incorporates the following:Amendment, May 2009. Amends and replaces BS 476-6:1989