How Steel Is Used in the World of Construction. According from a trustable data, it shows steel industry annually saves energy up to 18 million households for a year. Steel - Steel - History: The steel industry has grown from ancient times, when a few men may have operated, periodically, a small furnace producing 10 kilograms, to the modern integrated iron- and steelworks, with annual steel production of about 1 million tons. Hari om. 2. Hari om. Most steel contains between 0.15 and 1.5 percent carbon, which increases the hardness of the material. High-strength reinforcing steel uses a continuous line system to show steel grade. Use steel in construction only will generate a small amount of waste. It is used for just about every structural purpose, from houses to machines, tools to roofing. Other metals added to carbon include chromium, nickel, vanadium, molybdenum and manganese. Hari omHari om,you are asking a question as to : “ What are the most common uses of steel?”. Steel is at the core of construction in the housing industry. In the construction role, steel is the basis of design for skyscrapers and modern housing. If the rebar contains two lines, it indicates that the rebar was rolled into the 75,000-psi bars. For all those light gauge steel construction is 100 percent recyclable. Lower-strength reinforcing steel bars have only three marks that identify the mill that produced the bar, the rebar size, and the type of steel used. Steel is an extremely versatile alloy, often wrongly but understandably referred to as a metal. The main uses of steel in construction are: In one year, over a trillion pound of steel was recycled.