British standard BS476 fireproof glass window
British standard series BS476 fireproof glass doors and windows are manufactured in strict accordance with the requirements of British Standard BS476 Part22:1987. The door frame, door leaf, door glass and door fireproof seals and hardware fittings meet or exceed the requirements of the British standard, and have passed the British standard BS476 Part22. : 1987 multiple tests! All products comply with the safety requirements of the Hong Kong Fire Department and the Buildings Department. It is also applicable to all countries and territories approved by the BS476 Part 22:1987 standard.