Steel fire doors

In recent years, the CCTV building, Shenyang Dynasty Wanxin and other high-rise building fire brings people to reflect, in addition to the structure of the building envelope insulation material selected must have a reliable fire performance, than when the fire quickly spread to the upper air, fire rescue equipment limited by the height caused can not rescue, which requires building energy conservation advocate at the same time, strengthen the building of self-help measures. Here self-help measures are mainly two: active and passive self-help measures self-help measures. Proactive measures refers directly limit fires and the development of technologies such as fire detection and alarm technology, sprinkler, etc; passive measures refers to increase or enhance the building component or material to withstand fire damage capabilities of the technology, such as improving the fire resistance of building components technology Wait. The perfect self-help measures, better than the firefighters cope with unexpected fire. Doors and windows as the openings of the building envelope, is essential to a building fire rings, fire performance has become a key factor in preventing inter-layer high-rise building fire spread, fire doors and windows directly affects the quality of the building to resist fire Ability.

PDA steel fire doors developed its revolutionary breakthrough is its unparalleled insulation design, the Uf value reaches 1.3W / (㎡K) as possible; it produced large door or double doors as possible; PDA Fire the door is a thin-walled, large cross-sectional area of the complex shape of the empty structure, which is particularly suitable for continuous cold-formed steel production. Traditional domestic steel fire doors due to limitations of the technology and equipment that, generally using a plurality of components were then cold rolled welded steel frame of this mode of production is an obvious drawback is the need to go through multiple production framework manual steps, welding products due to thermal deformation accuracy is not high, and it is difficult processing complex section of window profiles. Steel fire door profiles roll forming technology is a material saving, energy saving, high efficiency of metal forming processes, it is made of high quality cold-rolled steel as a raw material at room temperature by drawing, stamping, bending or roll bending forming machine processing. The finished product production process include: cold-formed material ready, open-book process, flattening process, forming technology, welding technology, cutting collection processes. Based on proven roll forming the basis of theoretical support, the use of CAD / CAM for steel fire doors roll product design and process design of cold-formed equipment to produce steel fire profiles have the appearance of high precision, high-precision cross-sectional dimension, good mechanical properties, light weight and other characteristics. Simultaneously. By fasting structural design, window and door frames can reduce the rate of heat absorption, further improve its fire protection, fire resistance and fire so that the performance of steel fire door glass fire more support, give full play to the overall fire doors and fire performance. A wide variety of accessories more perfect set of excellent heat insulation system profiles. The traditional view that a cross-sectional structure of steel doors of small, low-intensity, in fact, on the contrary, to the door of the main force member quite neutral, for example, quite neutral in the calculation of the intensity of wind pressure, often used the following materials mechanical equation: [σ ] ≤M / W, [σ] - material allowable stress; M- moment acting on the main force member on the subject; W- resist material from the section. W = I / Y in the formula: the main cross-sectional moment of inertia I- profiles; the maximum distance between the outer surfaces of the two contour profiles Y- sectional profile of the heart from the moment of inertia main axis direction. Allowable stress of steel is [σ] = 210 MPa; aluminum allowable stress is [σ] = 70 MPa, exactly three times the difference. Since [σ] and I was a linear relationship, as for the moment the main force component on certain, when using steel profiles, cross-sectional moment of inertia of primary aluminum profiles only to 1/3, while aluminum up to 3 times the thickness required for steel profiles in order to bear the same load.

Currently, the state in large-scale implementation of energy-saving building wall insulation measures, however, in most of the current building insulation materials combustion performance does not meet the A class, the fire-resistant glass windows and a large number are still in use (such as B1, B2 level) wall insulation combined with the application of the program, is to prevent the spread of fire, reduce fire damage, provide a financial security to life and property, effective solutions. When the high-rise building facades fire, fire-resistant glass windows and doors can effectively prevent the spread of fire and smoke inside the building and to penetrate, to avoid the common window glass broken by the fire became the burning channel, triggering an internal fire and evolved into complex fire, security architecture internal life and property safety.

BMW brand I believe we all know, as the world's top automotive brands, German for selection of partners, professional and service attitude is also very high and demanding requirements, however, PDA ultimately exceed customer expectations, apart from a number of top international brands in the wall, it has become Asia's largest factory - the BMW plant in Shenyang steel fire wall, the only designated suppliers.