Cold-rolled ribbed steel rebars should comply with the provisions of GB13788-1992 in the China national standard "Cold-rolled ribbed steel rebars": First, according to the standard, the strength of cold-rolled ribbed steel rebars can be divided into three grades: 550, 650 and 800 (Unit: MPa). Among them, 550-grade steel rebars are suitable for stressed steel rebars, vertical rebars, stirrups and structural steel rebars in reinforced concrete structural members, and 650-grade and 800-grade steel rebars are suitable for stressed main rebars in small and medium-sized prestressed concrete members; , on the size, shape and weight of cold-rolled ribbed steel rebars. The shape of the cold-rolled ribbed steel rebar, the ribs are crescent-shaped, and the ribs on three sides are evenly distributed along the cross-section of the steel rebar, and one side must be opposite to the other two sides. The angle β between the center line of the rib and the axis of the steel rebar is 40 degrees to 60 degrees, and the oblique angle α between the sides of the rib and the surface of the steel rebar must not be less than 45 degrees. The sum of the intercostal spaces shall not exceed 20 percent of the nominal circumference.

The stringency of technical performance standards can vary between China's cold-rolled ribbed steel rebar standards and international standards. It is important to note that both China's standards and international standards aim to ensure the quality and performance of cold-rolled ribbed steel rebars, even some parameters or performance indicators may be more stringent in China's standards.

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