Steel for steel structure is mainly hot-rolled steel plate and section steel.Thin wall section steel, round steel and small angle steel are mainly used in thin wall light steel structure.The base metal used in steel is mainly common carbon structural steel and low alloy high strength structural steel.

       Hot rolled section steel commonly used in steel structure includes I-beam, H-beam, T-beam, channel steel, equal angle steel, unequal angle steel, etc.

The cold-formed thin-walled section steel includes cold-formed hollow section steel for structure and general cold-formed open section steel.

       Steel plate includes steel plate, checkered steel plate, profiled steel plate for building and color coated steel plate, etc.The steel plate is a rectangular flat steel, which can be rolled directly or cut by wide steel strip. According to the rolling method, it can be divided into hot-rolled steel plate and cold-rolled steel plate.The specification of steel plate is expressed by width × thickness × length (unit: mm).The steel plate is divided into thick plate (thickness > 4 mm) and thin plate (thickness ≤ 4 mm).Thick slab is mainly used for structure, while thin slab is mainly used for roof slab, floor slab and wallboard, etc.