A corner is an English L-shaped steel profile that is widely used in industries such as construction. Its cross-section is such that two perpendicular sides are placed on top of each other. This profile is used as a compound or alone in civil, construction and industrial projects.

Beam is one of the main members in the set of elements used in building structures. In fact, the main task of the beams is to withstand the stresses resulting from the shear force and bending moment caused by the loads on it and the weight of the beam itself. In the design of structures, usually the beams are designed based on the available bending moment and the shear rule is controlled in them. The main characteristics of beams are profile, length and material.

Metal sheet (in English: Sheet Metal) or in short sheet, is a smooth and flat sheet of metal that has been thinned by industrial processes and has a small thickness. The cards are handed out. Sheet is one of the main types of metal distribution, which is widely used in metalworking, and it can be cut and bent into various shapes. Many everyday components and parts are made of sheet metal by sheet metal processes. The thickness of metal sheets can be very different; Very thin sheets are called foil. And sheets with a thickness of more than 6 mm are called plates or "construction steel".

Metal pipes are typically made of steel or iron alloys, such as carbon steel, stainless steel, galvanized steel, and ductile iron. Iron-base pipes are exposed to corrosion if used in oxygenated water flow. Aluminum tubing may be used where iron is incompatible with the service fluid or where weight is a problematic parameter Pipes made of Inconel alloys, chromium moly steel and titanium are used for high temperatures and pressures in process factories and power plants. The global steel pipe market was valued at $142.4 billion in 2019 and is expected to grow at a CAGR of 6.2% from 2020 to 2027 to reach $54.68 billion.

All kinds of iron beams, corners and studs are used in the construction industry, such as beams and columns, wall posts, etc. Various types of sheets with different thicknesses are used in machine building and construction industries, such as building columns in the form of boxes Square and rectangular profiles with small sections are used as metal fences for doors and windows of houses, the side of stairs, as well as fencing around the walls of factories and fenced areas, and fences for sidewalks and streets.

Ribbed iron rebar is a reinforced steel or polymer fiber reinforcement that is used in concrete to compensate and increase its low tensile strength (concrete). The steel or polymer fiber that is used for this purpose in reinforced concrete structures is in the form of wire or rod. In certain cases of structural steel such as profiles I-shaped, studs or cans are also used to reinforce concrete. The tread in the rebar is for the purpose of engaging the steel in the concrete. For this purpose, the tread in the rebar is created in a spiral form and with a standard depth so that the surface of the rebar and concrete can be raised.

Among the game profiles that are widely used in the construction of foundations and frames of structures is studs. In this article, we will tell you what studs are and we will discuss the types of studs. The industrial and construction stud is a profile that is similar to the English U in its geometric shape. The cross-section of the stud is made up of one body horizontally and two wings vertically.

Steel rebars must be fixed in place before concreting so that they do not break apart during the movement of factors and the pressure of concreting, and they work in a unified manner. Reinforcing bands use reinforcing wire or reinforcing wire to tie two rebars together. Tying two rebars is called rebar knotting.