英国建材防火等级Class0

Class0,达到BS 476-7的Class1 和 BS 476-6 Pi<12, Si<6

16. The highest National product performance classification for lining materials is Class 0. This is achieved if a material or the surface of a composite product is either:
composed throughout of materials of limited combustibility; or
a Class 1 material which has a fire propagation index (I) of not more than 12 and sub-index (i1) of not more than 6.
Note: Class 0 is not a classification identified in any British Standard test.
来自英国建筑防火法规,Document B,Building Regulations 2006,Technical Guidance Document B

Approved Document B (fire safety) volume 1: dwellinghouses, 2006 edition incorporating amendments up to December 2018

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