The textured steel bars frequently used in construction are usually called ribbed steel bars, and the threaded parts on the steel bars are called cross ribs. There are various types of cross ribs in the building materials market. The most commonly used ones in house construction are spiral ones, and there are also crescent-shaped and herringbone ones.

The properties of seismic rebar and ordinary rebar are different, such as pressure resistance, bending force, ductility, etc. Other differences are appearance, use symbol, structure, etc. This paper introduces the specific differences.

A threaded bar is a bar with a ribbed surface, also known as a ribbed bar, usually with two longitudinal ribs and transverse ribs evenly distributed along the length. The shape of the transverse rib is spiral shape, herringbone shape and crescent shape. Widely used in the construction of houses, Bridges, roads and other civil engineering, it is a must for medium and above building components.