China's research and development of prefabricated houses began in the 195s and 196s, drawing on the experience of European and American countries. By the end of 197s, the proportion of prefabricated buildings in Beijing and Shanghai had reached 3% to 5% respectively, but there was no development since then due to many problems. With the development of China's iron and steel industry, the overcapacity of China's iron and steel industry, and the country's attention to environmental protection, prefabricated buildings can solve some common quality problems that traditional buildings can't overcome, such as water seepage, plastering, hollowing, cracking, geometric dimension deviation and a series of other problems. Coupled with a major breakthrough in the field of steel structure technology, prefabricated buildings have returned to people's field of vision.

As prefabricated houses promoted by the state, light steel and heavy steel have undoubtedly attracted the attention of building fans. At the same time, many people are annoyed at how to distinguish between heavy steel and light steel. The following data and materials are analyzed through the market standard light steel villa and heavy steel villa, leading everyone to understand in depth what is the difference between light steel villa and heavy steel villa.

Take the heavy steel villa products of Hunan Villa House Building Technology Co., Ltd. (referred to as Villa House. Chongqing Steel Branch) as an example:

1. Main structure

Light steel villa: The main structure adopts hot-dip galvanized steel strip as light steel dragon skeleton, and the conventional thickness is .8/1.2.

Villa House. Chongqing Steel Villa: The main structure adopts national standard H-beam as the main frame, with a thickness of 6/9.

through the comparison of the above main structures, it is concluded that the steel, specifications and steel consumption used in heavy steel villa and light steel villa are different.

II. Anti-corrosion technology

Light steel villa: Self-tapping screws are used, and the jointing technology is not used, which effectively protects the integrity of zinc film, so the corrosion resistance is excellent.

Villa House. Chongqing Steel Villa: The columns and beams are assembled by national standard high-strength carbon steel nuts without welding. The steel factory carries out manual derusting, and one primer and two topcoats are used for anticorrosion treatment. After installation, a layer of antirust film will be plated.

III. Safety

Light steel villa: It is physically connected by Dacromet screws and structural fasteners, and the foundation and the main body are designed with uplift and wind resistance, so that the whole building truly forms a whole, with excellent wind resistance and earthquake resistance.

Villa House. Chongqing Steel Villa: The main structure is closely combined with the foundation by L-shaped embedded parts to form a unified whole. Combined with the characteristics of steel itself, it is suitable for areas with magnitude 9 earthquake and above, and the wind protection level is 12.

iv. thermal insulation

light steel villa: thermal insulation cotton is built into the wall, and thermal insulation integrated decorative board can be made on the northern outer wall to achieve the effect of thermal insulation (the cost of thermal insulation in integrated plate is high)

Villa home. Heavy steel villa: the outer wall is made of special high-strength composite wallboard, which has waterproof, fireproof, thermal insulation and thermal insulation effects. Compared with red brick or light brick, it is better in comfort and bearing capacity, and the roof is used as thermal insulation layer.

V. Bearing capacity

Light steel villa: The bearing capacity is weak, and it can only bear the weight of 35 kilograms per square meter, and the span is small. It must be supported by an upright post every 6 centimeters, resulting in the maximum span of the whole villa not exceeding 6 meters. However, the traditional concept in China requires the living room to be large, which generally exceeds 6 meters. In addition, it is very troublesome to adjust the layout of the house in the later period, and because light steel villas mostly use hollow walls, the components must be embedded after the keel is installed to install water heaters and air conditioners.

Villa House. Chongqing Steel Villa: The national standard H-beam is adopted as the dragon skeleton, with a bearing capacity of 85KG per square meter and a span of 1 meters. The floor is paved with galvanized corrugated steel bottom plate, and the whole net is rolled with cross steel frame. After 1 cm of cement mortar pouring, the wall itself is solid, and the single point bearing capacity of the special high-strength composite wallboard can reach 1GK/ square meter. Drilling, cutting and slotting can be done at any time.

VI. Exterior wall decoration (appearance) and service life

Light steel villa: The exterior wall is generally made of cement fiber hanging board, which will fade in 2-3 years in sunny areas. resin tile is used as roofing tile, which looks very thin, which is the main reason why it is said that light steel villa needs maintenance in the later period.

Villa House. Chongqing Steel Villa: The exterior wall is made of solid wall, so the exterior wall decoration can be pasted with exterior wall tiles or made of real stone paint, and the roof material is made of ceramic tiles, which is more atmospheric in appearance, in line with traditional aesthetics, and does not need maintenance at all.

which is better, heavy steel or light steel? I believe that the market and time will verify everything, but judging from the current market feedback, Chongqing Steel Villa is undoubtedly the upper hand, and it is easier for people to recognize and choose. Prefabricated buildings are the development trend, which will replace the traditional brick-concrete buildings sooner or later, thus improving the overall living environment in rural areas of China.