BS6853:1999: Code of practice for fire precautions in the design and construction of passenger carrying trains.
BS6853 Annex B: Determination of weighted summation of toxic fume, R
The two different methods are as follows:
BS 6853 Annex B.1: Mass based test method(NF X 70-100)，This method should be appkied to minor use materials(table 7 and table 8),textiles(table 11) and cables (table 13 and table14).
BS 6853 Annex B.3 Gases to be analysed, analysed:CO,CO2,HBr,HCl,HCN,HF,NOx,SO2
BS 6853 Annex B.4 Calculation of R
What is toxicity testing?
Measuring the fumes produced from a material exposed to controlled fire conditions gives an indication of the fumes which may be produced in a real fire situation. This enables us to choose materials with lower levels of risk to human life.
BS6853:1999 Standard requirement for Toxicity testing
Interior minor use materials of mass 100g to 500g (BS6853 Table 7)requirement: R(max)≤1.0
Exterior minor use materials of mass 400g to 2000g (BS6853 Table 7)requirement: R(max)≤1.7
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