Steel rebar, short for reinforcing bar, is a steel rod used to strengthen concrete structures. It is typically made from carbon steel and comes in various sizes and grades. The ribbed surface of rebar helps it bond effectively with concrete, enhancing the overall strength and durability of the structure. Rebar is commonly used in construction projects such as buildings, bridges, and roads. By providing tensile strength, it helps prevent cracks and structural failures in concrete, which is strong in compression but weak in tension. This combination of materials ensures safer and more resilient constructions.