Steel is a very common building material, used throughout the construction industry. steel is used to form the skeleton of the building and/or structure and holds everything in place. steel is widely used as a construction material. this is because of its mechanical properties, ease and speed of construction and simplicity of design. it is extremely easy to adjust or extend it to an existing structure constructed of steel by simply welding or bolting new pieces of steel to the existing structure. and this will always give the structure the same resistance. Structural steel has a large number of properties that meet different requirements, including weldability, ductility, strength and corrosion resistance. the added feature of steel is that it will also not break when brought into contact with excessive loads. Steel can be shaped into several shapes and sections for specific construction needs, namely H section, I section, rectangular hollow section, unequal angles, square hollow section and many other shapes and forms. the introduction of steel began around the 1880s, which was initially manufactured in fairly large quantities which were later used for railway tracks etc. the first steel-framed buildings While these stupendous structures were the center of attention, a new and more important technology was developing: the steel-framed high-rise building. It all started in Chicago, a city with a growing central business district. 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 by constructing the ten-story Home Insurance Company Building in 1885, the structure of which was almost entirely steel. the frame was made of cast iron... middle of paper ...... use of eel aircraft hangars sports arenas warehouse buildings school buildings retail stores shopping centers Costs A number of factors can be considered having a key impact on the price of steel frames. All costs include allowances for a concrete core. The rates were developed based on cost models for different types of buildings and for each, the average weight of the frame was indicated. As already noted, before using such “standard ranges”, it is important to confirm the anticipated weight and variables of the frame. such as floor to floor heights with the design team to determine if they are above or below average and adjust the rate used accordingly. Likewise, all other key cost drivers of complexity, site conditions, location, function, logistics, program and procurement strategy must be considered in turn..