context: This reinforced concrete began to be used around the year 1900, as it was used in the tires, walls and floors of different buildings. Reinforced concrete is an ordinary concrete plus iron and it is called rebar. The concrete bears the pressure forces very well but is very weak in front of the forces Tensile strength. Therefore, steel is added to its ability to withstand tensile strength. Steel is rarely placed to resist pressure forces. [1]
question: When did you start using reinforced concrete?
answers.text: 1900