Precautions for construction of steel structure fireproof paint

      1. The steel structure fire protection spraying protection should be constructed by a professional construction team that has passed the training and has the corresponding construction qualifications. Strict construction plans are formulated according to project characteristics and product selection. The physical and chemical properties of coatings can be sampled according to the needs of the project according to the specified proportion before the project is carried out. For intumescent fire retardant paint, different parts should be selected to test the foaming performance during construction.

2. The surface cleaning of the base material of fire retardant paint should be strictly inspected as a process. Remove dust, iron filings, rust, grease and other substances that hinder adhesion, and do a good job of anti-rust treatment of the substrate. The primer and surface coatings in the fireproof paint shall be matched accordingly, and the primer shall not corrode the steel.

3. The thickness of the coating should reach the design value, and the joint parts should be thickened. The requirements of spraying site, surface treatment of components, filling of joints, paint preparation, number of spraying times, quality control and acceptance, etc., shall all comply with the current national standard "Technical Specification for Application of Fireproof Paint for Steel Structures" (CECS24). The coating thickness should be checked during construction (measured with a thickness gauge). If the cracks in the coating are common and the width is large, it should be studied and analyzed whether the process is correct and whether the mixing ratio of the coating is reasonable.

4. The spraying of fireproof paint should master the consistency of the paint, the pressure of the air compressor and the distance between the spray port and the component during spraying. The main observation during construction is that there are many splashes indicating that the construction parameters are unreasonable and should be adjusted. The amount of diluent in the coating should not be too much, otherwise the normal construction viscosity of the coating will be reduced, and the coating cannot be attached to the surface of the steel structure.

5. In the process of coating construction, it must be done after the previous coating is basically dried and cured. The protection method of the coating, the number of construction times and the thickness of the protective layer should be determined according to the construction design requirements. The coating thickness of each pass should be moderate, and it should not be too thick or not rolled evenly, so as not to affect the coating quality. Strictly follow the painting process, and do not leave safety hazards to the building in order to rush the construction period.

6. After the project is completed, it is not only possible to measure the thickness of the coating, but also to detect the color of the coating and the leakage and cracks by visual method. Tap the coating with a 0.75-1kg hammer to test its strength. Use a 1m ruler to check the flatness of the coating.

The role of the glass dome

      In order to create a comfortable urban leisure space and give full play to the affinity of urban public space, with the official appearance of the glass dome, the urban renewal of the "facade" of the Bund has added landmark buildings.China's distinctive glass dome is undoubtedly the China Port Museum in Ningbo, Zhejiang, and the adjacent national underwater cultural heritage protection base Ningbo Base. The 3 modules of the three glass domes above the roof consist of an irregular elliptical spherical hyperboloid structure.

The main frame of the glass dome is an aluminum alloy frame, and the stress frame is a steel structure. The panel is made of ultra-white tempered laminated glass and external glass. The decorative frame consists of aluminium alloy tubes of different sizes. According to the structure, it can be divided into mesh dome, tension dome, suspension dome and load-bearing dome. According to the material, it can be divided into brick dome, metal dome, film dome, glass dome and wooden dome.The ramps allow visitors to "symbolically rise above the heads of their room representatives".A "lightweight sculpture" at the center reflects the horizon into the interior, while sun visors track the sun's path to block sun gain and glare. The overall image makes people even more admire the greatness of steel structure construction engineers.

The importance of fire fighting equipment in steel structure buildings

In recent years, with the development of urban construction and the increase of high-rise buildings, the development of steel structure buildings in my country is very rapid. During the construction of steel structure buildings, construction waste and construction noise are reduced to a minimum. In addition, steel structure buildings have high seismic performance, easy reconstruction and demolition, and high recycling and reuse rate of materials. It is a green industry with harmonious and sustainable development between man and nature. Please do not ignore the related issues such as fire protection and anti-corrosion.

Due to the many shortcomings of concrete structure buildings, with the advancement of modern technology and the improvement of environmental protection awareness, steel structure buildings have been greatly developed. Whether it is for industrial or civil use, many builders tend to use steel structures. All kinds of steel structure houses stand in the alleys of big cities, which also indicates that a new round of changes in construction has come. Many construction parties strive to make the steel structure to meet the predetermined functional requirements such as safety, applicability and durability under the specified conditions and period of use at the lowest cost. But please don't ignore the firefighting facilities of the steel structure building in the later use. The following points should be paid attention to: the property rights unit, user unit or property management unit of civil public buildings shall implement unified management of the building, and can conduct regular inspections on each steel structure building to facilitate timely discovery of problems and active rectification. In the case of residential buildings, due to their private nature, it is difficult for management units to conduct long-term home inspections. Once the fire protection layer of the steel structure is damaged or fails due to aging, it cannot be found in time, resulting in long-term hidden dangers.

Destruction of fire protection layer of steel structure platform by decoration. Some owners usually renovate the building before use, even if fire protection measures are taken during the construction, due to the lack of professional knowledge of the owners and the importance of it, they did not protect it during the renovation process. Once the protective layer of the steel structure is damaged or even peeled off, it is often not repaired. Once a fire occurs, it will affect the safety of the main structure of the building and cause loss of life and property.

For the fire protection facilities of other civil buildings, such as fire alarm systems and automatic sprinkler systems, the national fire protection regulations have relatively clear requirements. Residential buildings have long been regarded as large-scale and wide-ranging economic buildings with relatively low cost and investment standards. Except for the high-rise residential buildings with a height of more than 100 meters and the high-rise residential buildings belonging to the first-class high-rise buildings, which should be equipped with automatic sprinkler systems, other types of multi- and high-rise residential buildings only need fire hydrant systems. It can be seen that, such as civil buildings that also use steel structure systems, the fire safety factor of residential buildings is relatively low because the regulations do not require the installation of automatic sprinkler systems. I hope everyone will not ignore the importance of fire protection in steel structure buildings.