After entering 2000, our country's national economy has grown remarkably, the national strength has strengthened obviously, the steel output has become the world big country
Although China had outstanding achievements in iron structure in its early days, it remained at the level of iron buildings for a long time. It was not until the end of the 19th century that our country began to adopt modern steel structures. After the founding ceremony of the People's Republic of China, the application of steel structure has developed greatly, both in quantity and quality, far beyond the past. The floor of light steel structure is composed of cold-formed thin-walled steel frame or composite beam, floor OSB structural plate, support, connector, etc. . The materials used are oriented particleboard, cement fiberboard, and plywood. In these light floor per square meter can bear 316-365 kg load.
The number of steel structure construction marks a country or a region's economic strength and development. After entering 2000, our country's national economy has grown remarkably, the national strength has strengthened obviously, the steel output has become the world big country, proposed in the construction must“Positively, the reasonable use steel”, from then on, cast off the shackles of“Restricted steel”, steel structure construction in the economic developed areas gradually increased. In particular, around 2008, under the promotion of the Olympic Games, there was a boom in steel structure construction, strong market demand, promoting the rapid development of steel structure construction, a number of steel venues, airports, stations and high-rise buildings have been built, some of which have world-class fabrication and installation techniques, such as those used in the Olympic Beijing National Stadium.
After the Olympic Games, the steel structure construction has been popularized and developed continuously, the steel structure is widely used in the construction, the railway, the bridge and the housing and so on, the world's advanced steel structure processing equipment is basically complete, such as multi-dimensional drilling machine, multi-dimensional steel pipe intersecting line cutting machine, corrugated plate automatic welding machine. And now hundreds of steel structure enterprise processing and production level has the world's advanced level, such as steel structure production super and first-class Enterprises. In recent years, steel output of more than 600 million tons per year, steel varieties can fully meet construction needs. The steel structure design code, the steel structure material standard, the steel structure engineering construction quality acceptance code, as well as each kind of specialized standard and the enterprise method are basically complete.