The fire endurance of Grade C fire door shall not be less than 0.6h. There will be a layer of electrostatic spraying on the surface, and the interior is filled with non-toxic and harmless fireproof and thermal insulation materials. The filler of Grade C fireproof door is perlite and cement fireproof materials that meet the environmental protection and fire protection standards.

Varavaran’ny afo ZHTdoors, traikefa famokarana 31 taona amin’ny varavarana afo sy Windows. Ny UL lehibe varavarana afo, EN varavarana afo, BS EN afo varavarana, sns.