The fire resistance time of Class A fireproof door is up to 1.5 hours. The internal horizontal and vertical frames of the door leaf are reinforced, effectively preventing the door leaf from being deformed by heat. The interior of the fire door leaf is filled with dense fire-retardant cloth faced perlite fire-proof board, and all parts are filled fully.

ZHTdoors branddeure, 31 jaar se produksie ondervinding in branddeure en Vensters. Die belangrikste UL-branddeure, EN-branddeure, BS EN-branddeure, ens.. Ons het sertifisering. ZHTdeure ondersteun OEM en gratis ontwerp. Ons voordele: goeie gehalte, fabrieksprys, goeie diens. Welkom om ons te raadpleeg.