What is BS 6401 – Optical density of smoke generated by materials about?
BS 6401 focuses on smoke generated by materials. The aim of the BS 6401 is to ensure the building materials are fireproof which ensures the safety of the residents. BS 6401 specifies a method for measuring the specific optical densities of smoke generated by materials when a specimen of specified form and thickness, of up to 25 mm in thickness, is exposed vertically to a radiant heat source of 2.5 W/cm2 in a closed cabinet, with or without the application of a pilot flame.
Note: This method is not applicable to the testing of insulated wire and cable as it is not possible to obtain a satisfactory distribution of heat flux with such products.
Who is BS 6401 – Optical density of smoke generated by materials for?
BS 6401 on optical density of smoke generated by materials is useful for:
- Buildings elements manufacturers
- Civil engineers
- Fire safety engineers
- Quality control and regulatory bodies
Why should you use BS 6401 – Optical density of smoke generated by materials?
Smoke which consists of airborne particulates and aerosols reduces visibility because of light absorption and scattering. This has the potential of impeding victims' escape from fires because low visibility creates difficulties in locating escape routes and seeing escape signs. It is important for the building elements to be fire-resistant as they improve the safety of occupants, firefighters, and neighbors during fire events, and minimize damage, so buildings can return to use quickly, boosting community resilience. Testing the optical densities of smoke produced by building elements involves determining its behaviour when exposed to a particular heating condition.
BS 6401 provides optical densities of smoke produced by building elements used in construction to prevent the spread of flame or smoke in a fully developed fire. This will ensure that the material used in the construction does not obscure the vision of people during a fire evacuation.
