Steel structure is a kind of structural parts made of steel materials, which has the characteristics of high strength, good durability and convenient assembly. It is widely used in construction, transportation, energy and other fields, such as bridges, highways, housing construction, power facilities, etc.

The main advantages of steel structures include:

1. High strength: The steel structure is made of high strength steel, which has high bearing capacity and tensile strength, and can bear large load and pressure.
2. Good durability: steel structure after anti-corrosion, fire protection and other treatment, has good durability and anti-aging performance, can maintain its long-term performance.
3. Convenient assembly: The steel structure parts adopt standardized connectors and accessories, which are easy to assemble and disassemble, and are suitable for mass production and construction.
4. Energy saving and environmental protection: steel structures are recyclable materials, which can reduce environmental pollution and waste of resources.

The main forms of steel structure include:

1. H-beam: H-beam is a common steel structure, which is composed of upper and lower flanges and webs. It has good stability and bearing capacity and is suitable for bridges, buildings and other structures.
2. Box girder: Box girder is a kind of steel structure with box shape, which has high bending strength and rigidity, and is suitable for high-speed railway, highway and other bridge structures.
3. Columns and foundations: Columns and foundations are important parts of building structures. Steel structures can be used to make columns and foundations of various shapes and sizes, such as steel pipe columns and steel columns.
4. Steel supports and fixings: Steel supports and fixings are components used to support and fix steel structures, such as steel supports, steel brackets, fixing bolts, etc.

In a word, steel structure is a kind of efficient and reliable structural material, which has a wide range of application prospects and development potential.