Steel is a very common building material, used throughout the construction industry. steel is used to form a skeleton for the building and/or structure and holds everything in place. Steel is widely used as a building material. it is for its mechanical properties, ease and speed of construction and simplicity of design. It is extremely easy to adapt or extend to an existing steel-built structure by simply welding or bolting new pieces of steel to the existing structure. and it will still give the structure the same amount of strength. Structural steel has a wide range of properties that meet different requirements such as weldability, ductility, strength and corrosion resistance. the extra feature of steel is that it does not break even if it comes into contact with excessive loads. steel can be shaped into different shapes and sections for the specific construction purpose which are H section, I section, rectangular hollow section, unequal angles, square hollow section and many other shapes and forms. the introduction of steel first began around 1880, first produced in rather large quantities which were then used for railway roads, etc. first steel-framed skyscrapers While these prodigious structures were the center of attention, it was developing a new and more significant technology: the tall steel-framed building. it all began in Chicago, a city whose central business district was growing rapidly. pressure from land values ​​in the early 1880s led owners to demand taller buildings. architect and engineer William Le Baron Jenney responded to this challenge with the ten-story Home Insurance Company building in 1885, which had an almost entirely steel structure. the frame was made of cast iron......paper core......eel useaircraft hangarssports arenaswarehousesschool buildingsretail shopsshopping centersCostsA number of factors can be considered to have a key impact on the price of structural steel frames . All costs include fees for a concrete core. The rates were developed from cost models of different building types and the average weight of the structural frame was provided for each. As already highlighted, before using such "standard ranges" it is important to confirm the weight and expected frame variables such as floor-to-floor height with the design team to determine whether they are above or below average and to adjust accordingly. the tariff used accordingly. Likewise, all other key cost factors such as complexity, site conditions, location, function, logistics, schedule and procurement strategy should be considered from time to time.