The fire resistance time of Class C fire door shall not be less than 0.5 h. Accessories used for Class C fire doors must be treated for fire protection to meet the specified fire resistance limit.

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.