Rebar is commonly known as hot rolled ribbed bar. There are three commonly used classification methods, namely, classification by geometry, classification by performance (grade) and classification by use. Steel bars are widely used in civil engineering construction such as houses, bridges and roads.

Classification of steel bars

Rebar is a common name for hot-rolled ribbed steel bars, and there are three commonly used classification methods:

First, classify according to geometry.

According to the cross-sectional shape and rib spacing of transverse ribs, steel bars are divided into type I and type II in British Standard (BS4449). This classification mainly reflects the grip performance of steel bars.

Second, according to the performance classification (level)

According to performance classification, such as China standard (middle), rebar is divided into three grades according to strength grade (yield strength); According to Japanese industrial standard (JISG3 1 12), rebar can be divided into five categories according to its comprehensiveness.

Three. Classification by purpose

According to the use, steel bars can be divided into ordinary steel bars for reinforced concrete and heat-treated steel bars for reinforced concrete.

Application of steel bar

Steel bars are widely used in civil engineering construction such as houses, bridges and roads. From highways, railways, bridges, culverts, tunnels, flood control, dams and other public facilities to the foundations, beams, columns, walls and slabs of buildings, steel bars are indispensable structural materials. China is vigorously promoting the use of high-strength rebar. Under the condition of meeting the same strength and standard size, the steel consumption is reduced by about 1 1%- 15% compared with the secondary rebar.