1986: USINOR SACILOR Group's welded mesh and concrete reinforcement production sites are consolidated into a single entity: ACOR.

1993: After the break-up of UNIMETAL, a new entity is established under the name SAM (Steel for concrete reinforcement), regrouping concrete reinforcing production operations. The company ACOR becomes a subsidiary of SAM.

1995: USINOR sells SAM and its subsidiaries (including ACOR) to the British group ASW (Allied Steel and Wire).

2000: RIVA Group acquires SAM and its subsidiaries (including ACOR).

The ACOR plant located at VAUVERT (Gard) produces welded mesh.

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