BS 857
Encyclopedia
BS 857:1967 is a currently in-use British Standard
specification for flat or curved safety glasses
(toughened
or laminated
) for use in land vehicles, including road vehicles and railway vehicles. The standard specifies the mechanical, safety, impact and optical requirements as well as sampling and test methods.
British Standards
British Standards are the standards produced by BSI Group which is incorporated under a Royal Charter...
specification for flat or curved safety glasses
Windshield
The windshield or windscreen of an aircraft, car, bus, motorbike or tram is the front window. Modern windshields are generally made of laminated safety glass, a type of treated glass, which consists of two curved sheets of glass with a plastic layer laminated between them for safety, and are glued...
(toughened
Toughened glass
Toughened or tempered glass is a type of safety glass processed by controlled thermal or chemical treatments to increase its strength compared with normal glass. Tempering creates balanced internal stresses which cause the glass, when broken, to crumble into small granular chunks instead of...
or laminated
Laminated glass
Laminated glass is a type of safety glass that holds together when shattered. In the event of breaking, it is held in place by an interlayer, typically of polyvinyl butyral , between its two or more layers of glass. The interlayer keeps the layers of glass bonded even when broken, and its high...
) for use in land vehicles, including road vehicles and railway vehicles. The standard specifies the mechanical, safety, impact and optical requirements as well as sampling and test methods.