Class A fireproof door can only reach 1.5h fire resistance time limit, and only the fireproof door made by special process can meet the 3-hour fire resistance requirement. The 3-hour fire door adopts the galvanized steel plate and stainless steel profile made by special process as the outer frame, which can be used as the window, but the window specification should not be too large.

ZHTdoors Brandschutztüren, 31 Jahre Produktionserfahrung in Brandschutztüren und Fenstern. Die wichtigsten UL-Brandschutztüren, EN-Brandschutztüren, BS EN-Brandschutztüren usw. Wir haben eine Zertifizierung. ZHTdoors unterstützen OEM und freies Design. Unsere Vorteile: gute Qualität, Neupreis, guter Service.