Fire doors are classified into Grade A, Grade B and Grade C according to their fire resistance. The fire resistance time of Class A fire door shall not be less than 1.5 hours, that of Class B fire door shall not be less than 1 hour, and that of Class C fire door shall not be less than 0.6 hours. Different places shall be equipped with fire doors of corresponding levels for use.

ZHTdoors iingcango zomlilo, iminyaka eyi-31 yamava okuvelisa kwiingcango zomlilo kunye neWindows. Iingcango eziphambili zomlilo ze-UL, iingcango zomlilo ze-EN, iingcango zomlilo ze-BS EN, njl., Sine-certification.ZHTdoors ixhasa i-OEM kunye ne-design.Our yamahhala: umgangatho omhle, ixabiso lefektri, inkonzo enhle.Wamkelekile ukuba uqhagamshelane nathi.