Cold-rolled ribbed steel bar symbol:

The symbol of cold-rolled ribbed steel bar CRB550 is φ

The symbol of high-ductility cold-rolled ribbed steel bar CRB600H is φ

The grade of cold-rolled ribbed steel bar

The grade of the steel bar is composed of CRB and the tensile strength characteristic value of the steel bar and the letter H representing high ductility. C, R, and B are the first letters of the words cold-rolled, ribbed, and bar respectively. Ribbed steel bar grades include CRB550, CRB600H, CRB650H, and CRB800H.

CRB550 is a brand of ordinary cold-rolled ribbed steel bars. When used to calculate the shear, torsion and punching bearing capacity, its strength design value should be taken as no more than 360N/mm2.

CRB600H is a grade of high ductility cold-rolled ribbed steel bars.

Terms for cold-rolled ribbed steel bars

①cold-rolled ribbed steel wires: hot-rolled disc bars are cold-rolled and reduced in diameter, and then cold-rolled on their surfaces. Steel bars with three or two sided transverse ribs evenly distributed along the length.

②The nominal diameter is the diameter of a circle equal to the nominal cross-sectional area of ??the steel bar.

③Welded steel fabric has longitudinal and transverse steel bars of the same or different diameters arranged vertically at a certain distance, and all intersections are welded together with resistance spots.

④Cold-rolled ribbed reinforced concrete structures concrete structures with cold-rolled ribbed steel wires A structure made of concrete equipped with cold-rolled ribbed steel wires for stress.