Installation steps of steel structure columns

The installation of steel structure columns is one of the difficulties in the construction of the radiant chamber of the heating furnace, and ensuring the verticality of each column is the key to the installation of the columns. In order to ensure the construction quality of the column, the "cross reinforcement symmetrical erection method" is used for installation during the construction. Specific steps are as follows:

1. Use a 50t truck to hang the first column on the ring beam at the bottom of the furnace. After aligning with two theodolites from two vertical directions, use four steel wire ropes to seal and temporarily fix it from four directions, and weld the column feet to the ring beam at the bottom of the furnace.

2. After erecting the second column in the same way in the symmetrical direction, use two seamless steel pipes (with connecting plates in the middle) to connect the two columns at about 2/3 of the height and reinforce them into sheets.

3. Use the same method to erect the third and fourth uprights in the vertical direction, and use two steel pipes to reinforce them horizontally. After connecting the four uprights into a frame, remove all the reinforcing cords.

4. With these four columns as the support, a 50t truck is used to erect the other 12 columns in turn. For each erected one, complete the installation and spot welding of the reinforcing ring beam below the cross reinforcement with the previous column at the same time. Then erect the next one in the same way until all are erected.

A 50t truck can be used to hang the hoarding. According to the layout plan, along the mesh steel skeleton from the lower ring to the upper ring of the hoarding. Before the hoarding, according to the arrangement of the board, there is no reinforcing ring beam at the upper and lower ends of the board, and a circle of wall bars can be temporarily set up to facilitate the hoarding and ensure the quality.

Testing method for bolt ball of steel structure space frame

       1. Bolt balls and materials needed to manufacture bolt ball joints. Its varieties, specifications, performance, etc. should meet the national product standards and design requirements.

Inspection method: Check the product's quality qualified documents, Chinese signs and inspection reports.

2. The bolt ball shall not have burning, cracks and folds.

Inspection method: Check a part of the bolt ball of each specification, observe with a 10x magnifying glass and inspect the surface.

3. The bolt ball thread size and thread tolerance should comply with the current national standards.

Inspection method: Check a part of the bolt ball of each specification and measure it with a standard thread gauge.

4. The size and allowable deviation of bolt ball diameter, roundness, and the angle between the center lines of two adjacent bolt holes should comply with the "Code for Acceptance of Construction Quality of Steel Structure Engineering".

Inspection method: Check a part of the bolt ball of each specification, and check whether it meets the specified value with a caliper and an indexing head instrument.

The above four are the detection methods of bolt balls for steel structure space frame. We can apply them to the actual inspection to improve the overall quality of the project.

Technical requirements for the production of space frame steel structure accessories

The current space frame and steel structure accessories include blanking plates, grid rods, bolt balls, high-strength bolts, cone, non-groove nuts and other products. There are high requirements for the production technology of these accessories. Improving production skills can improve the performance of the product is beneficial for the accessories to ensure the entire safety and stability of the building during construction. The following SAFS Steel Structure Space Frame Engineering Co., Ltd. will give you a detailed introduction.

For space frame steel structure accessories, it is necessary to gradually improve the performance of the product. It is very important to add the content of production technology. In the traditional production process, there are many impurities in the produced product, which affects the later use of the product., and the time of use will also be reduced. For the entire project construction, the overall project quality and safety factor will also be reduced, so for space frame steel structure buildings, they will have higher requirements for space frame accessories. The emergence of these situations also forces manufacturers to upgrade their production technology.

The wear resistance and anti-corrosion requirements of steel structure space frame accessories are relatively high. At the same time, due to these accessories are used in the construction industry, they have high requirements for the overall safety factor, because they need to be used after the completion of the large-span space frame project. , If the safety factor does not meet the standard, it will have a great impact on the later use of the building, and affect the service life of the building. Many real estate development industries have the highest requirements for the quality of space frame products, even if the price of the product is relatively expensive, but they are also willing to buy more products, so for space frame manufacturers, they need to learn from foreign production technology and join domestic product production, so that they can have an absolute competitive advantage in the market competition.

How to use steel structure for large-span roof construction

Large-span roof construction is very important for buildings, so what is the process of using steel structure for large-span roof construction? Is there anything to pay attention to? China SAFS steel structure takes everyone to learn together. The space frame manufacturer analyzes the steps of steel structure roof construction:

①When laying glass wool roll felt, the veneer should face the indoor side, perpendicular to the purlin, leave about 20 cm of rolled felt at the eaves of one side, and fix it on the outermost purlin with a special clamp or double-sided tape;

② Ensure that the roll is aligned and tensioned when unwinding, lay the glass wool roll felt on the other side of the eaves, also leave 20 cm of roll felt, and fix it on the outermost purlin with a special clamp or double-sided tape;

③ The two rolls of cotton are connected together by binding with a stapler on the veneer flash;

④ Install the roof color steel plate, remove the fixtures at the eaves on both sides, and use the reserved 20 cm veneer to close the edge of the glass wool;

⑤ Pay attention to maintaining the tension and alignment of the glass wool roll felt, and the joint between the rolls is tight. When the longitudinal overlap is required, the overlap joint should be arranged at the purlin;

⑥ According to the needs of the project, in order to avoid the generation of cold bridges, some hard thermal insulation materials can be considered on the purlins.

The space frame company analyzes three installation methods for the structure of a single-story industrial plant

       SAFS Steel Structure Space Frame analyzes three installation methods for single-story industrial plant structures: piece-by-piece hoisting method, inter-node hoisting method and comprehensive hoisting method.

1. Piece hoisting method

The hoisting method in parts is that when the plant structure is hoisted, only one or two components are hoisted each time the crane is hoisted. Generally, all components are hoisted in three times. The first time to hoist the column, and to correct and fix it; the second time to hoist the crane beam, the connecting beam and the inter-column support; the third time to hoist the roof truss, skylight frame, roof panel and roof support between sections.

Part-to-piece hoisting method, the same type of components are hoisted every time the crane is used. The crane can be selected according to the weight and installation height of the components. Different types of cranes are selected for different components, which can give full play to the working performance of the crane. During the hoisting process, the number of rigging changes is small, the hoisting speed is fast, and the efficiency is high, which can provide sufficient time for component correction, welding and fixing, and concrete pouring and curing.

2. Comprehensive hoisting method

The comprehensive hoisting method means that part of the components in the building (columns, inter-column supports, crane beams and other components) are hoisted by the separate hoisting method. Part of the components (all the components of the roof) are hoisted by the internode hoisting method. The comprehensive hoisting method absorbs the advantages of the piece hoisting method and the inter-node hoisting method. Therefore, this method is mostly used in structural hoisting.

3. Inter-node hoisting method

The inter-node hoisting method means that in one operation of the crane during the hoisting process, all or most of the various types of components are hoisted between the sub-nodes. The advantage is that the crane has a short walking route, and the working surface can be created for the next process according to the interval in time. However, it is required to choose a crane with a larger lifting capacity. The performance of the crane cannot be fully exerted, the rigging is frequently replaced, the installation speed is slow, the supply of components and the layout are complex, and the time for component correction and post-fixing is urgent. This method is generally not used for the hoisting of reinforced concrete structure workshops, and is only suitable for the installation of steel structure workshops and gantry structures.