Designed for an easy and quick assembly. It consists on longitudinal ?C? type metal profiles that put the system together with 18mm. phenolic treated plywood. Designed to build large ground constructions such as treatment plants, water retaining walls, buried ponds and other round stores. With the tie rods aligned on the profiles we can give the wall a minimum curvature of 3.5 metres radius. It?s compatible with the Wood - Metal and Heavy Line forms, and with their accessories (both for climbing and joining each other vertically) making it extremely versatile. Designed with large dimensions saving time and working labour costs.