Reinforced concrete is concrete that is made with pieces of metal inside it to make it stronger. concrete with metal bars in it to make it stronger. Concrete in which steel is embedded in such a manner that the two materials act together in resisting forces. The reinforcing steel rods, bars, or mesh absorbs the tensile, shear, and sometimes the compressive stresses in a concrete structure. Plain concrete does not easily withstand tensile and shear stresses caused by wind, earthquakes, vibrations, and other forces and is therefore unsuitable in most structural applications. In reinforced concrete, the tensile strength of steel and the compressive strength of concrete work together to allow the member to sustain these stresses over considerable spans. The invention of reinforced concrete in the 19th century revolutionized the construction industry, and concrete became one of the world's most common building materials
Steel rods are inserted in concrete beams to help them withstand longitudinal stress without collapsing This development has allowed the construction of very large structures using concrete beams