BS 6853:1999 PDF

Code of practice for fire precautions in the design and construction of passenger carrying trains Executive summary Recommendations for fire safety in the design and construction of passenger carrying trains. Abstract This British Standard makes recommendations in respect of fire safety for the design and construction of railway vehicles comprising or forming part of passenger carrying trains. The recommendations are applicable to new vehicles and also to substantial changes to existing vehicles. The recommendations in this standard cover: a) the reaction to fire of materials; b) the use of fire resisting barriers; c) general aspects of design for fire safety. The objectives of this standard are:

to control the power and duration of ignition sources and the frequency of their occurrence; to control the reaction of materials to ignition sources of a variety of sizes; for smaller ignition sources, of the order of 1 kW, to ensure that conditions within the affected vehicle remain tenable almost indefinitely; for larger ignition sources, of the order of 10 kW, to ensure that the period during which conditions remain tenable is consistent with the time required for people to move from or through the affected vehicle; for the largest ignition sources, of the order of 100 kW, to ensure that the probability of a transition to flash-over within the vehicle is minimized; to limit the rate of heat release from the vehicle on flash-over; to limit the impact of the products of fire on areas remote from the seat of the fire.

History and related standards This British Standard supersedes BS 6853:1987, which is withdrawn. This standard includes the following cross references: BS 476-4, BS 476-6, BS 476-7, BS 476-15, BS 476-20, BS 476-22, ...