The fire-resistant heavy-duty door is very durable, and its resistance to wind pressure deformation is also very strong. It is the preferred door type for many high-rise residents. The profiles of fire-resistant heavy-duty doors are made of aluminum, strontium, copper, magnesium, manganese and other alloys, which have great advantages in toughness.

ZHTdoors fire doors, 31 years of production experience in fire doors and Windows. The main UL fire doors, EN fire doors,  BS EN fire doors, etc.,.We have certification.ZHTdoors support OEM and free design.Our advantages:good quality, factory price, good service.Welcome to consult us.