Rebar is a steel bar or mesh containing steel wires, used to hold something back. It is often used in the construction of large buildings as a means of keeping concrete in one location as it hardens and as extra reinforcement to the concrete slabs. The concrete goes between the mesh ridges in the rebar and is affixed there, adding another layer of support to the structure. This is used for concrete beams in buildings a as well as for pouring flooring in some cases. The rebar rods used come in a variety of thicknesses and lengths to fit the different uses.
You might find rebar necessary if you are building a home or a commercial structure. It is important that a knowledgeable and experienced contract perform the work so that it is up to code and standard. Rebar is used in a structural capacity and is a vital part of ensuring that a structure is sound enough to withstand pressure. This might be pressure due to the weight of a building, vehicle or even the force of an earthquake or hurricane. This mesh of steel wires is an essential part of many structures and their integrity. A professional must work with engineers to define what the parameters are for the rebar placement.