LOCKING. Because of the pressure exerted by the concrete casting inside the formwork, the rod tends to slip in the clamps locking each end.
This is when the locking effect take place. The rod is gripped firmly by the wedge with longitudinal redges made of very hard tempered steel, these bite into steel rod and prevent it from slipping. Locking is automatic and tightens progressively as the pressure increases.
In fact, the wedge is forced to slide on an inclined plane, gripping it tighter as the rod increases its pull. Using RAPID clamps avoids any danger of the formwork giving way and perfectly rectilinear casting are obtained every time.
