According to the international regulations and internal regulations such as the sixth appendix of the 2800 standard and the eighth chapter of the national regulations, the standard bed rebar is made of a pair of longitudinally shaped wire (brick) with a diameter of at least 3 mm, which is cold rolled, and a The transverse wire is formed in the form of a truss (suitable for earthquake-prone areas) which is welded to them, and is cold-galvanized in order to prevent corrosion, with the appropriate thickness, which is also approved by the Road, Housing and Urban Development Research Center.