Before use, the rod needs to be straightened out by the steel bar straightening machine. 

Meanwhile, the oxide rust is removed in the machine. In repeated bending and stretching, the strength is improved to some extent.

No straightening machine for a small site, using the winch straightening rod, if it is directly pulled is not desirable, 

easy to produce too much plastic deformation, should be one end of the heavy hammer with pulley, in order to control the tension.

Wire rod is round steel with a relatively small diameter. The commodity form is rolled into a coil for supply. Commonly used on the construction site are 6, 8, 10, and 12 mm in diameter, mostly low-carbon steel, and generally not used for the main reinforcement of reinforced concrete structures. , Mostly used for making steel bar sleeves, and small diameter "brick reinforcement" used in brick-concrete structures.