What is bed rebar?
Various methods are used to strengthen the building against earthquakes, and one of the most widely used methods is the use of bed rebar. In this article, we want to talk about bed rebar, its types and its uses. These rebars have ribbed grooves on their surface to make better contact with mortar or concrete. Steel undergoes erosion over time, the surfaces of this type of steel bars are covered with a coating of zinc. This coating is anti-rust and increases the life of the rebar and prevents early erosion of these rebars. As a result, with this work, the quality and lifespan of the rebar will increase.
Material of bed rebar
According to the definitions and information about the bed rebar in various references, the material of this rebar should be stainless steel. Also, according to paragraph 8-4-3-8 of the eighth topic of the national regulations, the longitudinal wires of these rebars should be completely buried in the slurry or mortar. This cover should be at least 16 mm if it is exposed to air or soil. But if it is not exposed to air or soil, this value can be at least 13 mm. All these types of rebars should be made of galvanized steel (stainless steel). When the building is exposed to air or soil, or in internal walls that are in conditions where the average relative humidity is more than 75%, they must be protected against corrosion by galvanized or epoxy coating.
