What is the future development of light steel prefabricated building houses? 50

"Prefabricated building + new infrastructure" will stimulate market demand

In the future, China's steel structure industry will continue to develop rapidly. On the one hand, promoting the industrialization of new buildings (prefabricated buildings) has become an urgent requirement for the reform and development of China's construction industry. With the gradual deepening of the "steel structure prefabricated housing pilot" carried out by the Ministry of Housing and Urban-Rural Development in 2019, it is expected to promote the accelerated development of the steel structure industry and the replacement of traditional steel-concrete buildings.

According to the "China Statistical Yearbook 2019", the output value of China's housing construction industry in 2019 is one trillion yuan, according to the prefabricated building development plan, by 2020, the proportion of prefabricated buildings in the country will reach more than 15% of new buildings, without considering the overall scale growth of the industry, the output value of prefabricated buildings will reach one trillion yuan, and the market space is huge.

On the other hand, with the expansion of investment in the "new infrastructure" industry, the construction of UHV and 5G base stations involving steel structure demand has brought huge potential growth demand to the industry. Among them, in terms of UHV construction, the State Grid will arrange an investment of 450 billion yuan in the power grid in 2020, which is expected to drive social investment of more than 900 billion yuan, and the overall scale will exceed one trillion yuan. Among them, the investment scale of UHV construction projects is 181.1 billion yuan, which is expected to effectively drive social investment of 360 billion yuan, and the overall scale will reach 541.1 billion yuan.

—Please refer to the above data and analysis in the Qianzhan Industry Research InstituteChina steel structure industry market in-depth research and development prospect research report

I want this new structure of the house. It should be the trend of future development.

At present, the national requirement is that the promotion of prefabricated buildings within ten years will have small achievements, but the promotion does not mean that prefabricated buildings can completely replace cast-in-place structures. Because now the main domestic method is semi-cast-in-place and semi-assembly, the quality of the fully assembled type in the country can not be guaranteed, and the level of materials used is not as good as that of developed countries, and only the use of semi-cast-in-place and semi-assembly quality can be guaranteed. As for the complete replacement of certain types of work, it is possible, after all, the post-90s generation will soon become the main force of the construction industry, but the post-90s generation itself inherits very little to the level of traditional work, so even if it is replaced, it will not cause major problems.

Prefabricated buildings refer to buildings assembled on the construction site with prefabricated components produced by factories. The prefabricated construction mode adopts standardized design, factory production, and assembly construction, and transfers a large number of on-site operations in the traditional construction method to the factory. It is a new type of sustainable building production mode that can realize energy saving, environmental protection and maximization of the life cycle value of building products.

Prefabricated buildings are mainly divided into three technical modes, prefabricated precast concrete structure, steel structure and wood structure, the three technologies are self-contained, each with its own advantages, and light steel structure building is a kind of prefabricated building.

Prefabricated precast concrete structure.

The cost is relatively low, and the application is the widest.

The prefabricated concrete structure has a low construction cost and is suitable for multi-storey, small high-rise office buildings and residential buildings with a large volume and a wide area. On the basis of the traditional technical framework, the prefabricated concrete structure focuses on the parts of exterior wall panels, interior wall panels, floor slabs and other components, with a component rate of 40% to 50%, and if it is extended to the integration of on-site decoration, the cost can be further compressed to close to the cost of traditional technology, and the high efficiency of building a floor in about 5 days can be realized. It has a wide range of application scenarios in multi-storey buildings with large volumes and wide areas, especially in the residential field.

Prefabricated timber structure.

The cost is the highest, and the application scenarios are limited due to national conditions.

Due to the large population of our country, the large demand for housing, and the scarcity of per capita forest resources and timber reserves, the wooden structure is not suitable for the needs of China's building development. In addition, China's "Code for Timber Design Design" clearly stipulates that the number of floors of timber buildings cannot exceed 3 floors, and limits the maximum length and area.

Prefabricated steel structure.

Good seismic resistance, different costs, and a wide range of applications.

At present, the domestic steel structure industry has a high degree of marketization, low industry concentration, and serious homogeneous competition. According to the process and use, the steel structure industry can be divided into three sub-industries: light steel structure, multi-high-rise steel structure, and space steel structure.

The prefabricated steel structure has good seismic resistance and is suitable for high-rise buildingsThe prefabricated steel structure is mainly composed of steel beams, steel columns, steel trusses and other components made of section steel and steel plates, etc., and the components or components are usually connected by welds, bolts or rivets. It is widely used in large-scale factories, venues, super high-rises, residential and other fields.

At present, there are many housing structures on the market in China, in addition to the brick and concrete building structure, light steel structures are also needed. Is the light steel structure self-built house Yuling good? What are the disadvantages of light steel structure? Let's follow me to find out!

Is it good to build a light steel structure house?

Compared with the traditional structure of the house, the light steel structure of the house or very good, with light weight, fast construction, low and other characteristics, so it is widely used in office buildings, sports venues, warehouses, resort tourism engineering construction and low, high-rise residential engineering construction and other industries.

Advantages of light steel structure.

1) The cost is low, the basic solution is simple, the application field is wide, the basic cost is about half of the traditional Chinese building, and the project construction is fast, the construction period is tight, and the labor cost is saved.

2) The key material of the house is steel, which does not destroy natural resources.

3) No harmful substances appear. Screws and steel nails are used to connect the components of the house during construction, and no welding and adhesives should be used, so there will be no damage such as compounds, and there will be no dust and noise during decoration and construction.

4) Good safety factor, high compressive strength and light weight, which is conducive to transportation and safety. It is not easy to rupture due to inadvertent overweight or partial overweight. In addition, its net weight is only one-fifth of that of the brick-concrete building structure, which can effectively reduce the load and improve the safety factor.

5) Fire safety, mothproof, steel has been maintained by deep hot-dip galvanizing during production, so it can effectively avoid the damage of white ants, and can also automatically repair the damaged coating.

6) The thermal insulation effect is very good, this kind of house is selected to use the external thermal insulation method, with thermal insulation and waterproof board to cover the frame from the outside, and with the thermal insulation layer, air and wall, you can reasonably carry out thermal insulation.

7) Recyclable, steel is the key raw material for building a house, it is not easy to flow out and age, and the waste steel can be used in all.

What are the disadvantages of light steel spring void structure?

1) The cost of the project is more expensive than that of the traditional structure of the house.

2) The internal structure is fixed, and the wall cannot be dismantled and rectified casually.

3) The regulations on raw materials are relatively open.

4) The steel structure is fireproof, but it is not heat-resistant, and if a fire accident occurs, it will melt when the degree only needs to be more than 500 degrees.

Light steel structure has a wide range of uses and obvious advantages, and has been widely used in single-storey industrial plants, multi-storey industrial plants, office buildings, kindergartens and non-load-bearing components of high-rise buildings, but there are few applications in residential buildings. The light steel structure housing is generally Peibu with light steel keel as a load-bearing system in the low-rise civil housing application, roof system or floor system with profiled color steel plate as the surface layer, the top can be poured concrete, profiled steel plate can be used as both steel bar and template, if necessary, can also be equipped with more steel bars. The wall enclosure can also be made of single-layer or laminated profiled steel plates, and the interior of the sandwich panels can be filled with various insulation layers.

Light steel structure residential energy saving and environmental protection. The light steel structure of the house completely abandons the traditional "Qin brick Han tile", and the materials used in the wall can be reused, which has high environmental significance. Wall insulation alone is much superior to traditional masonry.

The windows of light steel houses are generally made of insulating glass, which not only has a good thermal insulation function, but also can save a lot of energy. Moreover, it has a high sound insulation function, and its sound insulation degree can generally reach more than 40 decibels, which greatly reduces noise pollution for residents.

The indoor water and electricity pipeline layout of the light steel structure house can all be buried in the wall, and the layout is very flexible, and the modification is also very convenient.

High degree of industrialization, short design, production and installation cycle. The design, production and installation of modern light steel buildings, with the help of network computer technology and industrial production means, can realize the integration of design, production, construction and installation, with extremely high efficiency and accuracy, the project construction period is short, and the construction period can be shortened 1 2 1 3. This will greatly reduce the investment cost, so that the owner or construction developer has a great advantage in enjoying the return.

The layout is flexible and the net usable area is large. Using the excellent bearing performance of section steel, it can flexibly arrange the building plane with large bay and large column spacing; The design of the non-load-bearing walls provides residents with the possibility to flexibly arrange the interior space according to different uses.

1. The cost is low, the foundation treatment is simple, the scope of application is wide, the foundation cost is about half of the traditional building, and the construction is fast, the construction period is short, and the labor cost is saved.

2. No harmful substances are produced. The building is built with screws and nails connected to each other, and no welding or adhesives are used, so there are no hazards such as chemicals, and there is no dust or noise during construction.

3. Good safety performance, high strength, light weight, easy to transport and install. It will not break due to accidental overload or local base overload. In addition, its weight is only one-fifth of that of the brick-concrete structure, which can effectively reduce the load and improve safety.

4. Fireproof and insect-proof, the steel is deeply galvanized and protected during manufacturing, so it can effectively prevent termite invasion and automatically repair the damaged layer.

5. The thermal insulation effect is good, this kind of house adopts the external insulation method, which covers the skeleton from the outside with thermal insulation and moisture-proof materials, and then matches the thermal insulation layer, air layer and external wall, which can be effectively insulated.

6. Recyclable, steel is the main material for building houses, not easy to lose and age, and waste steel can be fully utilized.

Disadvantages of light steel self-built houses:

1. The cost is more expensive than the traditional structure of the house.

2. The internal structure is fixed, and the wall cannot be dismantled and rectified at will.

3. There are more requirements for materials.

4. The steel structure is fireproof, but it is not resistant to high temperature, if a fire occurs, as long as the temperature reaches more than 500 degrees, it will melt.

Precautions for building light steel villas.

1. When buying building materials, you must remember to choose a big brand, you can first go to the local building materials market to understand, and then make a decision. Generally speaking, the cost is relatively high, so you need to prepare sufficient funds, which is also a relatively big test for your financial ability.

2. If necessary, you can go to a professional construction company to help, let the designer design first, draw the drawings, and then arrange the construction personnel to build according to the content of the drawings, so that the built house will be more beautiful.

1. Advantages: The construction process is simple, which can save time and effort, and is convenient and fast. At the same time, it is also very environmentally friendly and does not produce substances harmful to the human body.

The cost is low and cost-effective. The structure is stable, not easy to collapse, and the safety index is high. In addition to these advantages, it is also fireproof, which can reduce the probability of fire.

2. Disadvantages: Compared with ordinary houses, light steel structure houses cannot remove walls, which is more troublesome in decoration. Low corrosion resistance and cannot be left untouched in wet environments. Because of its low dead weight, it cannot carry heavy loads and has poor load-bearing capacity.

<> advantages of light steel structure houses: 1. Low cost and environmental protection. The overall cost is relatively low, and compared with traditional house construction, the cost of light steel structure houses can be saved by about half.

In addition to this, this type of house has a wide range of applications, and it is environmentally friendly and does not produce toxic substances. 2. This kind of house is light in texture, which is conducive to transportation, and it is also very fireproof. Disadvantages of light steel structure houses:

1. Light steel structure houses cannot be dismantled and modified independently. 2. The corrosion resistance and high temperature resistance are not good. If it is not cleaned in time when exposed to water, it will be easy to be damp and corroded.

So on the whole, light steel structure houses are cost-effective.