What Is Welded Wire Reinforcement?
As defined by ASTM A1064, welded wire reinforcement is a material composed of cold-worked steel wire with indented or raised rib deformations. The wire itself is cold-drawn or cold-rolled from hot-rolled steel rod. The cold-working process includes reducing, deforming, and straightening. With final wire diameters produced, the wires are then automatically assembled and machine-welded to form mat-type structural reinforcement for concrete.
Welded wire reinforcement, historically called wire fabric, is produced in sheets and rolls, and is mainly used by the precast and cast-in-place concrete industries. Compared to standard methods of placing loose, individual pieces of steel reinforcing, welded wire reinforcement is an efficient, economical, and viable option for concrete reinforcement.
How Welded Wire Reinforcement (WWR) Is Made
- Controlled-quality, hot-rolled smooth rods are cold-worked through a series of dies or cassettes to reduce the size, resulting in wires of project-specific diameter with higher yield strength.
- Wire intersections are electrically resistance-welded by automatic machines.
- Pressure and heat fuse the interacting wires together into a homogeneous section and into fixed position. No consumable electrode material is used in the welding process.