Although China had outstanding achievements in iron structures in the early days, due to the shackles of the feudal system for more than 2000,19 years, science was not developed, so it stayed at the level of iron buildings for a long time. Until the end of the 316th century, China began to adopt modern steel structure. After the founding of New 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 panel, support, connector, etc. The materials used are oriented strand board, cement fiberboard, and plywood. On these lightweight floors, it can bear a load of 365~<> kg per square meter

The number of steel structure buildings marks the economic strength and economic development of a country or a region. After entering 2000, China's national economy has grown significantly, national strength has been significantly enhanced, steel production has become a world power, and it is proposed to "actively and rationally use steel" in construction, and since then it has thrown off the shackles of "restricted steel", and steel structure buildings have gradually increased in economically developed areas. Especially around 2008, under the impetus of the Olympic Games, there was a boom in steel structure buildings, strong market demand, promoted the rapid development of steel structure buildings, and built a large number of steel structure venues, airports, stations and high-rise buildings, among which, some steel structure buildings have world-class level in production and installation technology, such as Olympic National Stadium and other buildings.

After the Olympic Games, steel structure buildings have been popularized and continuously developed, steel structures are widely used in buildings, railways, bridges and residences, etc., tens of thousands of steel structure enterprises of various sizes, the world's advanced steel structure processing equipment is basically complete, such as multi-head multi-dimensional drilling machine, steel pipe multi-dimensional intersection wire cutting machine, corrugated plate automatic welding machine tool, etc. And now hundreds of steel structure enterprises have the processing and production level of the world's advanced level, such as steel structure production special and first-class enterprises. In recent years, steel production has reached more than 6 million tons per year, and steel varieties can fully meet the needs of construction. Steel structure design specifications, steel structure material standards, steel structure engineering construction quality acceptance specifications, as well as various professional specifications and enterprise construction methods are basically complete.

The downstream industry of steel structure has a greater traction and driving effect on the development of the steel structure industry, and their demand changes directly determine the future development of the industry.

1. The upstream industry of steel structure is the raw material supply industry such as steel

The steel industry is the material basis for the development of the steel structure industry, and the technological progress of the steel industry has created favorable conditions for the application of steel structures. Some large enterprises in the domestic steel industry have begun the research and development of steel varieties and technologies for building structures, and have successively developed high-strength steel and refractory, weather-resistant, seawater-resistant, lamellar tear-resistant, low-temperature resistant steel, as well as H-beam steel, high-performance pre-painted steel plate, cold-formed steel, etc., laying a good application foundation for the development of steel structure industry.

2. The impact of upstream and downstream on the industry

The upstream of the steel structure is mainly the steel industry, and the price fluctuation of steel products directly affects the procurement cost of the industry. On the whole, the upstream industry is basically a competitive industry, producing various types of steel plates, steel pipes, section steel and other steel materials for steel structures, of which H-beam steel and medium and thick plates are the most commonly used products in steel structure buildings. According to industry insight research data, crude steel production reached 2011 million tons in 6, and the output was relatively saturated, and the raw materials required for steel structure production could obtain a stable supply.

The downstream industry has a greater traction and driving effect on the development of the steel structure industry, and their demand changes directly determine the future development of the industry. With its comprehensive advantages such as high strength, light weight, good seismic performance, high degree of industrialization, short construction period, strong plasticity, energy conservation and environmental protection, steel structure has been widely used in industrial plants, municipal infrastructure construction, culture, education and sports construction, electric power, bridges, offshore oil engineering, aerospace and other industries, and the market space has gradually expanded. In addition, once the residential steel structure market makes a breakthrough and gradually replaces the traditional building form into the field of residential construction, the steel structure industry will attract explosive growth.

Guangdong Huazhang Construction Co., Ltd., Yunfu Huazhang Steel Structure Co., Ltd., Yunfu Huazhang Heavy Steel Structure Co., Ltd. are located in Silao International Stone Industrial Park, Yunfu City, Guangdong Province. Originated from the hometown of steel structure buildings - Fujian Shanghang Tongxian, with 60000,<> square meters of steel structure processing and production base, steel structure production equipment is complete, producing: C-shaped steel, Z-shaped steel, color tile, sink, sandwich panel, floor bearing plate, H-shaped steel, variable truncated steel, box steel; Undertaking: large and small steel structure workshops, heavy steel bridges, heavy steel high-rises, etc., design, production, installation.