H-shaped steel - Application scope and characteristics Application scope H-shaped steel is mainly used for beam and column components in industrial and civil structures.



◆ Steel structure load-bearing brackets for industrial structures



Steel piles and support structures for underground engineering



Structure of industrial equipment in petrochemical and power industries



◆ Long span steel bridge components



◆ Ship and machinery manufacturing frame structure



◆ Train, car, and tractor beam brackets



◆ Port conveyor belts and high-speed baffle support H-beams are an economical cross-section steel widely used in industries, buildings, bridges, oil drilling platforms, and other fields. It is predicted that the demand for H-beams in China was about 2.5 million tons in 2005 and 5 million tons in 2010. However, the current annual production capacity of H-beams in China is 1.2 million tons, and the market demand is very huge.



On May 20, 2013, the market price of Jinan H-beam steel remained stable. According to data from China Industry Insight Network, the price of H-beam produced by Laigang for 200 * 200 * 8 * 12 is 3680 yuan (ton price, the same below); The price of 300 * 300 * 10 * 15 is 3860 yuan; The price of 400 * 200 * 9 * 14 is 3800 yuan, which is the same as last Friday's price. After inquiry, it was found that the H-beam inventory in Jinan is generally in the hundreds of tons, with only a few large households having over 4000 tons of inventory. However, regardless of the size of the inventory, digestion is slow, and merchants report that there is basically no sales on weekends. At present, there is an imbalance between supply and demand in the downstream of the steel market, and it is difficult for merchants to find buyers by hoarding goods in their warehouses. Only distributors with fixed customer resources can ship goods. The merchant stated that the transaction prices of steel in the entire market are transparent, and the prices of H-beams are basically the same. Only a few specifications have low inventory, and the prices are slightly higher, but digestion is still slow.



Merchants believe that the recent rapid pace of price adjustment by steel mills has led to a rapid frequency of price changes in the profile market. In the absence of grasp of the trend of the Jinan H-beam market, the wait-and-see atmosphere is heavy, and caution will be exercised in the short term. The Jinan H-beam market price will be weak and consolidated. Characteristic 1:Compared with I-beams, the structural strength is high, and the cross-sectional modulus is large. When the bearing conditions are the same, it can save 10-15% of metal.



2. The design style is flexible and rich. With the same beam height=100%, the bay of steel structure can be 50% larger than that of concrete structure, making the building layout more flexible.



3. Compared with the weight of concrete structures, the light weight of the structure reduces the internal force of the structural design, which can lower the requirements for foundation treatment of building structures, facilitate construction, and reduce costs.



4. High structural stability. Steel structures mainly made of hot-rolled H-beams have a scientific and reasonable structure, good plasticity and flexibility, high structural stability, and are suitable for building structures that withstand large vibration and impact loads. They have strong resistance to natural disasters, and are particularly suitable for building structures in earthquake prone zones. According to statistics, among the devastating earthquake disasters with a magnitude of 7 or above in the world, steel structures mainly made of H-beams have the least degree of damage.



5. Compared to concrete structures, steel structure columns have a smaller cross-sectional area, which can increase the effective usable area of the building. Depending on the different forms of the building, it can increase the effective usable area by 4-6%.



6. Compared with welding H-shaped steel, it can significantly save labor and materials, reduce the consumption of raw materials, energy, and labor, lower residual stress, and have good appearance and surface quality.



7. Easy for mechanical processing, structural connection and installation, as well as easy removal and reuse.



8. The use of H-shaped steel for environmental protection can effectively protect the environment, which is manifested in three aspects:firstly, compared to concrete, dry construction can be used, resulting in less noise and dust; Secondly, due to the reduction of self weight, the amount of soil taken for foundation construction is small, which causes little damage to land resources. In addition, a significant reduction in concrete usage and the amount of rock excavation is beneficial for the protection of the ecological environment; Thirdly, after the service life of the building structure expires, the amount of solid waste generated after the structure is dismantled is small, and the recycling value of scrap steel resources is high.



9. High degree of industrial production. Steel structures mainly made of hot-rolled H-beams have a high degree of industrial production, which is convenient for mechanical manufacturing, intensive production, high precision, easy installation, and easy to ensure quality. They can be built into real house production factories, bridge production factories, industrial factory building production factories, etc. The development of steel structures has created and driven the development of hundreds of emerging industries.



10. The construction speed of the project is fast, the land occupation is small, and it is suitable for all-weather construction, with little impact from climate conditions. The construction speed of steel structures made of hot-rolled H-beams is about 2-3 times that of concrete structures, and the capital turnover rate is doubled, reducing financial costs and saving investment. Taking the ' Jin Mao Building ' in Pudong, Shanghai, the ' tallest building ' in China, as an example, the main structure with a height=100% of nearly 400m completed the structural capping in less than half a year, while the steel concrete structure required a two-year construction period.