Reinforcement bars, commonly known as rebar, are steel rods used to strengthen concrete structures. They help improve the tensile strength of concrete, which is naturally strong in compression but weak in tension. By embedding rebar within concrete, builders can create more durable and resilient structures, such as bridges, buildings, and roads. Rebar comes in various sizes and grades, allowing engineers to choose the appropriate type for specific construction needs. It is often placed in a grid pattern within the concrete before it sets, ensuring that the two materials work together effectively. This combination enhances the overall stability and longevity of the structure.