Steel structure spray technology introduction

 Nowadays, the repetitive use of steel has greatly reduced construction garbage and green and environmentally friendly. It can be said that it is widely used in industrial buildings and commercial buildings.

For traditional concrete buildings, it uses steel plates or steel to replace steel concrete, which has a higher strength and better seismic resistance. And because the component can be made in factory, it is installed on the spot. As a result, it is greatly reduced and recognized by most people. Regarding the beauty of the steel structure, the spraying method is indeed a technical work.

When using the sprayer, the iron shelf and steel structure spray are essential. First of all, we must polish the surface of the steel structure for rust removal treatment. At the same time, we must remember that the steel structure after polishing can complete the paint within 4 hours.

Basically, the polished steel structure can complete the paint in 4 hours. And many times, during use, we also need to focus on the use of ET-98 inorganic phosphate long-effect type zinc-rich coatings as primer. In most cases, it is enough to remove oil and rust, but it does not need to be polished, but use steel wire brush, polished or steel sandpaper.

It is important to note that we must first polish the surface of the steel structure. In general, in addition to debris such as rust and oxide, it is also necessary to pay more attention to its surface treatment quality control should reach the SA2.5 level specified in the "front steel surface rust level and rust level" standard specified in GB8923. And the surface roughness is 35-75um, and the sand dust is removed after polishing.

Under normal circumstances, we can use light sweep -grade grinding method to remove the gray layer with galvanized layers and have impurities such as oil pollution. During the later use, we also need to pay attention to its 70-H epoxy iron red anti-corrosion paint.

If you encounter welding parts, it is recommended not to paint within 72 hours after the candle welding.

Why do you need to use wood grain paint with steel structure

               With the rapid development of the mineral industry, the previously precious metals, such as steel and iron, are currently very favorable. Therefore, many buildings are now used in metals such as steel structures, iron pipes, such as steel structure guardrails, iron pipe guardrails, steel structure gazebo, steel structure flower stand, metal corridor and other metal structures:

Due to the characteristics of steel structures, because of its own characteristics, it is easy to be affected by the water in the air or the rain, snow and frost in the natural world, and high and low temperature, and produces rust stains. It not only affects the perception, but also affects the service life of these buildings. However, after the decoration of wood grain paint, the surface of these metals will form a protective film, which effectively isolates the water in the air and the impact of wind and frost in nature on metal.

Secondly, I have to talk about the feel of the steel structure, iron pipe and other materials. The feel of these metal itself has a little rustic feeling, and the hand feels smooth and moisturized after the wood grain paint becomes the film, and the feel is very good. If you are not making wood paint on the metal surface, it is easy to score your hands or other parts when the temperature is too high. After making wood grain paint, not only the heating of the metal, but also the metal feel.

Finally, let's talk about the appearance of the metal. The appearance of the metal, whether it is steel structure or iron pipe and other metals, the surface of the building is monochrome. In addition to inconsistency with the surrounding environment, it also does not seem to have a little natural beauty, and the overall looks full of sharp feelings. However, if the wood grain paint is made, the wood grain paint gives a more gentle and stable feeling of metal building.

What is the difference between multi-layer steel structure and single-layer steel structure

The characteristics of steel structure are: the heat resistance of steel structure is good, but the fire resistance is poor; the test shows that when the performance of steel changes from normal temperature to 150 ℃, the strength and plasticity of steel change greatly at 600 ℃, and the strength drops to zero , Completely lose the bearing capacity, and the fire resistance level of the steel structure is improved. When the fireproof coating thickness of the fireproof coating is 15mm, the fire resistance limit of the steel member can reach 1.5h.

 

1. Single-story: There is only one-story building on the ground, which is a single-story building, including industrial plants (single-story height above 6-8m), civil buildings (2-3m) and agricultural factory buildings (above 2.2m) and other buildings.

 

2. Multi-storey: Refers to 4-6 storey buildings.

 

3. High-rise: Refers to buildings with more than 10 floors and a total height of less than 100 meters.

 

4. Super high-rise: Refers to buildings with more than 40 floors and more than 100 meters.

 

5. High-rise buildings and super high-rise buildings mainly adopt steel-concrete structures, such as: cross columns, box columns and other structural forms.

 

The above is the introduction of SAFS steel structure to different places of multi-layer and single-layer. Steel structure is widely used today and is also loved by more builders.

Main Factors of Steel Structure Damage and Its Reinforcing Technical Measures

 The main factors of steel structure damage are:

(1) Insufficient bearing capacity of the structure caused by load changes, extended service, and changes in codes and regulations;

(2) The component is deformed, twisted, disabled, dented, etc. due to various accidents, resulting in weakening of the section of the component, warping of the rod, cracking of the connection, etc.;

(3) Deformation, cracking and warping of components or connections caused by temperature difference;

(4) The cross-section of steel structural members is weakened due to corrosion caused by chemical corrosion and electrochemical corrosion;

(5) Others include mistakes in design, production, and construction, and illegal use and operation during the service period.

There are mainly three types of reinforcement technical measures for steel structures:

(1) Cross-section reinforcement method: Reinforce with steel in part or along the whole length of the member, and connect them into a whole to make them bear common force;

(2) Change the calculation diagram: add additional supports, adjust the load distribution, reduce the level of internal force, and force the displacement of the statically indeterminate structural supports to reduce the stress peak;

(3) Prestressed cable method: use high-strength cables to reinforce weak links of the structure or improve the overall bearing capacity, stiffness and stability of the structure.

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.

Why is steel structure processing and manufacturing an inevitable product of the era of economic development?

In recent years, a large number of new building materials have been developed and researched. With the promotion of energy saving, environmental protection and green buildings, steel structure processing and manufacturing was born. The construction field is no longer the era when reinforced concrete dominates, and because of the advantages of steel structure itself. On a global scale, especially in some areas of developed countries, steel structures have been reasonably and widely used in the field of construction. Why is steel structure fabrication popular in the construction industry? How is its unique advantage manifested? The following SAFS steel structure processing manufacturers will analyze it for you, and hope to help you.

The steel structure engineering system has the comprehensive advantages of light weight, quick installation, short construction period, good seismic performance and less environmental pollution.

The specific performance is as follows:

Earthquake resistance: Insiders know that the roof structure of low-rise villas is basically a triangular roof truss made of cold-formed steel members, which has stronger earthquake resistance and can be used even in places with high earthquake magnitudes.

Wind resistance: Steel structure buildings are light in weight, only one-fifth of that of brick-concrete structures. It can resist the hurricane of 70 meters per second, so that life and property can be effectively protected.

Durability: Light steel structure residential structures are all composed of cold-formed thin-walled steel member systems. The steel frame is made of super anti-corrosion high-strength cold-rolled galvanized sheet. Effectively avoid the influence of corrosion of steel plates during construction and use, increase the service life of light steel components, and make the service life of steel structures up to 100 years.

Buildings processed with steel structures also have the advantages of comfort, heat preservation, and energy saving, which are not available in traditional reinforced concrete buildings. So some people say that the steel structure even prolongs the life of the house, and there is some truth to it. It can be seen that the steel structure series products are still very useful, and the application will be more extensive.