BS6853 Annex D8.5 smoke density test using seat test method

1. Standard- BS6853 Annex D8.5 
BS6853 Annex D: Methods for measuring smoke density
BS6853:1999 Code of practice for fire precautions in the design and construction of passenger carrying trains.

BS 6853 Annex D.8.5 is utilized for seats (Tables 9 of BS6853: 1999). NB. Tests should be performed on actual specimen seats

2. Standard Brief-BS6853 Annex D8.5
The smoke density measurement taken from a material under fire conditions gives an indication of the visibility through the smoke, this is important as reduced visibility in a real fire situation makes it more difficult to escape from a fire hence increasing the threat to human life from the toxic gases, flames and heat. 

BS6853 Annex D.8.5—smoke density test using seat test method

3. BS6853:1999 Standard requirement for Smoke density testing 
Sear trim for BS6853 requirement: A0≤8.7

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