What is a four-proof door?
The four-proof door generally refers to a fire-resistant entrance door. The reason why it is called a four-proof door is that it has four functions of fire prevention, anti-theft, sound insulation and heat insulation. To achieve the functions of fire prevention, sound insulation and thermal insulation, the lock used is an anti-theft lock, thereby achieving the anti-theft function.
The main function of the anti-theft door is anti-prying and good sealing. The filling of the door leaf is not a fireproof material, but it is a general filling, which varies from manufacturer to manufacturer.
The thickness of the four-proof door leaf and door frame are also required. The thickness of the frame material is not less than 1.2mm and the thickness of the fan material is not less than 0.8mm. The interior must be filled with fire-resistant materials and then equipped with anti-theft locks and fireproof cat eyes. 2. Significant anti-theft performance.防火门最大尺寸是多少？ Previous: What is the maximum size of a fire door? 不同耐火等级防火门适用范围 Next: Application scope of fire doors of different fire resistance levels