First, the theoretical weight:

Second, the steel specifications

The specifications and models of steel bars are classified according to their diameters, and commonly used ones are φ6, φ8, φ 10, φ 12, φ 14, φ 16, φ 18, φ20, φ22, φ25, and φ 25. Among them, the steel bars with φ6-φ 10 specifications are packaged in drums when leaving the factory, and the length is cut according to the engineering needs when using; Φ12-Φ 40 steel bars are packed in long strips, with a general length of 9M or 12M.

Three, rebar grade division

Rebar grades are divided into three grades, namely: secondary rebar, represented by HRB335; Grade ⅲ reinforcement, represented by HRB400; Grade 4 rebar, represented by HRB500. At present, the steel bars commonly used in engineering are all Grade III and above, and the steel bars with φ 12 and above are mostly seismic steel bars, and the seismic steel bars are represented by HRB400E and HRB500E.

Four, the theoretical weight calculation of steel bar

Meter weight (kg) = diameter (mm) * diameter (mm) * 0.05438+07.