Carbon Steel Square Pipe is a hollow structural tube with a square cross-section, made primarily from iron and carbon. It is known for its high strength-to-weight ratio and structural stability. These pipes are produced either seamlessly or, more commonly, by welding a rolled steel strip. Widely used in construction frames, machinery structures, fencing, gates, and various architectural applications for support and framework due to their excellent load-bearing capacity.

Galvanized square steel pipe is a hollow structural tube with a square cross-section, made from carbon steel and coated with a layer of zinc. This galvanization process, typically through hot-dipping, provides excellent corrosion resistance, preventing the steel from rusting. It combines the high strength and formability of steel with the durability of a zinc coating. It is widely used in construction frames, fences, gates, handrails, and various industrial structures.

I - beams are widely used in buildings and other metal structures.
Whether the I-section steel is ordinary or light, because the section size is relatively high and narrow, the moment of inertia of the two main axes of the section is large, so it can only be directly used in the web plane bending members or it is composed of lattice stressed members.
The selection of I-steel in the structural design should be based on its mechanical properties, chemical properties, weldable properties, structural size and other reasonable selection of I-steel for use.

H-section steel is a kind of economic section of high efficiency with more optimized section area distribution and more reasonable strength-to-weight ratio. Because its section is the same as the English letter "H", it gets its name. Because each part of H-beam is arranged at right angles, h-beam has the advantages of strong bending resistance, simple construction, cost saving and light structure weight in all directions, and has been widely used. [1] An economic section shaped like the capital Latin letter H, also known as universal steel beam, wide flange (edge) I-beams or parallel flange I-beams.

U Channel Steel is used in construction and machinery with carbon structural steel, is a complex section of the steel section, the section shape for the groove shape. U Channel steel is mainly used for building structures, curtain wall engineering, machinery and equipment and vehicle manufacturing. In the use of the requirements of its welding, riveting performance and comprehensive mechanical properties. The raw material billets of the U channel steel are carbon steel or low alloy steel billets with carbon content not exceeding 0.25%.

Steel rebar (reinforcing bar) is a steel bar with ridges used to strengthen concrete. Concrete is strong under compression but weak under tension. Rebar, embedded within concrete, absorbs these tensile stresses, such as bending forces. This combination creates the strong, durable composite material essential for modern structures like buildings, bridges, and highways.