Class B steel fire door GFM2123 factory low-price direct supply package passed acceptance

型号：

GFM2123

规格：

乙级

颜色：

根据客户要求定制

Introduction to steel fire doors (direct sales hotline) (Note: This unit price is per square meter, excluding door closers, freight, and installation) Direct sales from the manufacturer, fire doors with ID card, inspection report, certificate, including fire protection acceptance. No money if not qualified. Fire department designated product.
Steel fire doors are made of steel materials to make door frames, door leaf frames and door leaf panels. If the door leaves are filled with materials, they are filled with fireproof and heat-insulating materials that are non-toxic and harmless to the human body, and are equipped with fireproof hardware accessories. Doors with certain fire resistance performance. In the fire protection code for high-rise civil building design, fire doors are classified into three levels: A, B, and C, and their fire resistance limits are stipulated. Class A doors must not be less than . shall not be less than . hours, Class C doors shall not be less than . hours
Steel Class A fire doors, the maximum size is
Steel Class B fire doors, the maximum size is
Steel Class C Fire doors, maximum size