Precautions for bolt connection during steel structure building construction

      The quality of steel structure construction is related to the safety of the construction of the building afterwards, so the quality control of each construction link is very important. So what do you need to pay attention to for steel structure bolt connection? The following is introduced by SAFS Steel Structure Company.

The bolt connection is the key task of the quality control of the steel structure. We need to check each bolt after tightening to prevent the phenomenon of leakage. For those phenomena that are not tightened or twisting, we must re -tighten or replace bolts.

1. Do not use gas cutting

The bolts in the steel structure building are usually used in ordinary bolts and high -strength bolts. The connection of ordinary bolts must not be padded with more than two spacers at each end of each bolt. And if the bolts are misplaced, they cannot be expanded with gas cutting, and they must be used to use a knife or re-cutter.

2. High-strong bolt quality control

After the bolt is tightened, the exposed thread must not be less than 2 to 3 thread distance. The control of high -strength bolts is the connection of the bolt, the treatment of the friction surface, and the frictional surface anti -slip coefficient. The initial twist and final twist of the bolt connection, and the torque value, the surface of the node is damaged and deformed.

3. Installation of high -strength bolts

During the installation process of the high -strength bolt of the steel structure, the contact surface must be flat, and the area of contact must be greater than 75%, and the gap of the edges must not be greater than 0.8 mm. The high -strength bolt cannot be used as a temporary installation, and the tightness of the bolt should be performed in one direction. The bolts installed every day must complete the final tightening work and check them one by one to prevent leakage.

Different steel structures have different fire protection measures

1. Expansive material

The steel structure fireproof coating is used to protect the components. This method has the advantages of good fireproof and heat insulation performance, and the construction is not limited by the geometric shape of the steel structure. Belongs to modern advanced fire prevention technical measures.

 

2. Outer cladding

It is to add an outer cladding on the surface of the steel structure, which can be cast-in-place or sprayed. The solid concrete outer cladding of steel structure fire-proof cast-in-place is usually reinforced with steel wire mesh or steel bars to limit shrinkage cracks and ensure the strength of the shell. Spraying method can apply sand pump to the surface of the steel structure at the construction site to form a protective layer. The sand pump can be lime cement or gypsum mortar, or it can be mixed with perlite or asbestos. At the same time, the outer cladding can also be made of perlite, asbestos, gypsum or asbestos cement, and light concrete to make prefabricated panels, which are fixed on the steel structure with adhesives, nails, and bolts.

 

3. Shield

The steel structure is set in the wall or ceiling composed of refractory materials, or the components are enclosed in the gap between two walls, and the purpose of fire prevention can be achieved only by adding a little or no refractory materials. This is one of the most economical fire prevention methods.

 

4. Fill with water

Filling the hollow steel structure with water is the most effective protection measure for steel structure fire prevention. This method keeps the steel structure cool during a fire, and water circulates within the steel structure, absorbing heat from the material itself being heated. The heated water can be recirculated after being cooled, or cool water can be piped in to replace the heated water.

The difference between steel structure carport and membrane structure carport

1. The value of landscape design

The carport is a small building, and its shape has attracted people's attention. Due to the particularity of steel, the steel structure carport has a relatively simple shape. The main material of the membrane structure carport is membrane material, the curve is high, and it can be shaped at will according to the designer's imagination.

 

2. Construction management cycle

1. The membrane structure carport is smooth and simple, and can be completed in the processing plant without more processes, and the construction period is short.

2. The steel structure carport requires complex processes such as welding, and the construction period is long.

 

3. Maintenance cost

1. The membrane structure carport uses the membrane material to contact the social air pollution environment, the membrane material will not be corroded by the air, and there is no maintenance and management cost in the later period. the

2. Steel structure carport, the appearance is made of steel, generally painted to prevent corrosion temporarily. Generally, steel will rust in a large area within one or two years, requiring complicated maintenance procedures such as paint removal, rust removal, and painting, and the maintenance cost is high.

 

4. Security

1. The surface of the membrane structure carport is smooth, there will be no snow and rain in large-scale development and stagnation areas, and the weight is light, so there is no need to worry about the risk of collapse.

2. The steel carport is very heavy, and the safety risk of collapse is great.

 

5. Service life

1. Membrane structure carport can be anti-corrosion, generally can be used for 20 years. the

2. The steel structure shed can generally be used for about 10 years.

 

6. Cost

1. Membrane structure carport uses membrane as the main material, which is cost-effective and easy to maintain.

2. The steel structure carport uses steel as the main research material, the process is complicated, the labor cost is high, the maintenance management cost is high, and the comprehensive engineering cost is low.

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.

Installation standards for steel structure engineering

Steel structures are widely used in the construction industry. Steel structure workshops are the first choice of many entrepreneurs because they can store a large number of products. The SAFS steel structure manufacturer will take you to understand what the engineering installation standards are.

 

1. Marks should be set at the end of the steel to indicate the specification, grade, quantity and material acceptance certificate number of the steel;

 

2. When stacking in the open air, the site should be flat, higher than the surrounding ground, and drainage ditches should be set around;

 

3. When stacking, try to make the back of the section steel face upward or outward to avoid snow and water accumulation. There should be a height difference at both ends to facilitate drainage;

 

4. Before installation, the construction unit should conduct special inspections on the product qualification certificates, design documents and pre-assembly records of the components, and review and record the dimensions of the components;

 

5. Appropriate connection methods should be adopted to make the joint design consistent with the simplified structural calculation model;

 

6. When hoisting the steel structure, appropriate measures should be taken to prevent excessive bending and torsional deformation, and heat blocks should be placed at the contact between the rope buckle and the component to prevent damage to the component;

 

7. After the steel structure is hoisted in place, the brackets and other connecting parts should be fastened in time to ensure the stability of the structure;

 

8. When using tools at high places, spare parts should be put into the tool bag, and they should not be thrown up and down;

 

9. When working in rainy days, reliable anti-skid measures should be taken, and lightning protection should be paid attention to during thunderstorm seasons;

 

10. Before construction, the weather conditions are good, and no work is allowed if the wind is above level 4.

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.

Space frame manufacturer's transportation and storage requirements for craft accessories

       Before the process engineering, the space frame manufacturer will process the parts of the accessories.

After the coating of the accessory surface is dry, the space frame is checked in detail after drying the coating of the accessories. The surface coating of the packaging protection component is a complete drying state, ensuring that the components and parts are not deformed, damaged, and no loss.

The names, numbers, weights, and hanging points of the space frame of the space frame packaging, the name, number, weight, and hanging point position, etc., and fill in the packaging list.

In the installation order of the process attachment, the space frame structure accessories is assembled according to the unit, and the configuration is complete and re -supply. The stacking venue on the spot can meet the needs of the on -site installation order.

During the transportation of space frame accessories, the length and weight of the space frame craft accessories are combined with the appropriate transportation vehicles. The fulcrum of the space frame accessories on the transport vehicle, the length of the two ends, and the method of ligation must ensure that the space frame accessories do not produce deformation and not damage the coating.

The daily storage requirements of the craft accessories of the space frame to ensure that the ground floor is flat and firm. Divide and store according to the type, model, and installation order of the components; the bottom cushion should have sufficient support surface to prevent the fulcrum from sinking. When the same type of space frame accessories are stacked, the fulcrum of each layer of the space frame accessories should be kept on the same vertical line to prevent the space frame accessories from being fractured and deformed.

After the craft accessories to the construction site, the relevant personnel should check the details of the accessories, check the number of accessories entry accessories, and check the factory certificate and related information.

Features of the space frame structure

Space frame engineering is gradually increasing in people's daily life. As we all know, it is a space frame structure composed of several rods connected according to a certain network space. According to the appearance design of the product, there are flat space frame and inclined spherical space frame, showing the characteristics of the space frame structure of the interior space.

 

The spherical space frame has the characteristics of triple stress, and can bear various stress functions. Generally, the internal structure can be adjusted according to the force standard of the spherical space frame, and has a high safety factor. For the spherical space frame, this is the The rods at the intersection of the upper sky not only bear force but also have the function of pillars, ensuring the comprehensiveness of the space frame project, and the product has good stability, high rigidity and good seismic performance during use.

 

The space frame structure building project can realize the large-span structure of small rods to build large-scale projects. At the same time, the space occupied by the structure is relatively small, and the interior space can be used with greater efficiency.

 

The structure of the spherical space frame has very unique characteristics. It can carry out various stresses by changing the stress state, which greatly stimulates the strength of materials and reduces the consumption of materials. In addition, The raw material of the rods for manufacturing the space frame structure is relatively simple, which is conducive to transportation and storage, and is conducive to improving productivity and ensuring the quality of the project.

How to quickly build a steel structure warehouse

Many companies now plan to build new factories in order to meet production needs. From the perspective of construction costs, the steel structure warehouse is much lower than that of traditional factories, while the construction time is shorter. However, some people don't know much about the steel structure, and they don't know how to quickly complete the construction of the warehouse.

It is learned that it is not a problem to build steel structure factories quickly. First contact steel structure manufacturers. In recent years, with the accelerated development of the steel structure industry, many manufacturers have provided steel structure construction services. Under the same conditions, it is recommended to contact manufacturers with good reputation and brand influence in the industry. They have established construction specifications and have professional design and installation teams to meet user needs. The second is to speed up steel structure design. What kind of factory do you want to build?

Customers can refer to the existing steel structure model and make amendments to the dissatisfaction place. Finally, the construction of steel structure is strictly organized. From the perspective of construction, it involves the flat field and the installation of steel structure. In order to achieve continuity, each construction program is connected as much as possible, and at the same time, it is well collaborative. In fact, some professional steel structure manufacturers have a whole set of construction processes and installation steps. When customers determine the factory style, they will promote it in many ways and work together to complete the installation of the warehouse.

It is estimated that the construction cost of the steel structure warehouse is only about 40%of the traditional factory buildings, which can effectively reduce the production cost of the enterprise. Therefore, more and more enterprise users choose to build steel structures. As long as the above points are grasped, the construction speed of the steel structure has been significantly improved. If you have a plan to build a warehouse, you can contact the SAFS steel structure grid company. This is a regular company that provides steel structure design and installation services. Strong strength and recommended.

Steel structure factory roof characteristics

The roof of the steel structure factory building is generally relatively flat, because the steel structure factory building is usually relatively flat, and the area is relatively large, and it will not be said that there are some uneven or strange designs. The practicability of the uneven steel structure factory building is very poor, because the area of the steel structure factory building is generally larger than that of the ordinary factory building, so the uneven factory building structure

The body is not conducive to the application of steel structure workshops. It is precisely because of this that the roofs of many steel structure factories are designed to be flat, because the roofs of steel structure factories are still serving steel structure factories in essence. 

The heat dissipation of steel structure workshop roofs is generally better, this is also because the work performed in steel structure workshops is generally the kind of work that generates relatively large heat, such as some glass manufacturing or some light industries, This kind of steel structure factory building needs a lot of power support. When using a lot of electricity, it will generate a lot of heat. Therefore, when designing the roof of a steel structure factory building, it is generally considered to use materials with better heat dissipation , In addition, there are generally more people in steel structure workshops, so it is necessary to consider heat dissipation and ventilation from every angle as much as possible, because human breathing will produce carbon dioxide.