Reinforcement steel, commonly known as rebar, is a type of steel bar used to strengthen and support concrete structures. It is typically made from carbon steel and comes in various sizes and shapes, often featuring ridges to improve the bond with concrete. This material is essential in construction, as it helps prevent cracking and enhances the tensile strength of concrete, which is naturally strong in compression but weak in tension. In construction projects, reinforcement steel is placed within concrete before it sets, ensuring that the two materials work together effectively. The use of rebar is crucial in various applications, including buildings, bridges, and roads, where structural integrity is vital for safety and durability.