Reinforced concrete is an essential tool in modern construction. This is made by combining reinforcement and concrete. The reinforcement can be made of many different materials; however, the material must have a high tensile strength and also be stiff. Concrete is an outstanding material to resist compression, fire, and outside chemicals but it is weak in tension. This is why these two materials are so important together. The video gives the history of reinforced concrete and also explains how reinforcement is conceptually designed in reinforced concrete. This will be useful to designers and also contractors.