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 takes place. The rod is gripped firmly by the wedge with longitudinal ridges made of very hard tempered steel; these bite into the 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 castings are obtained every time.

DOUBLE LOCKING ONLY OFFERED BY RAPID CLAMPS.