CCL’s Un-bonded single strand tendon system is quick to install; tendons can be easily deflected to avoid openings and to cope with irregular slab shapes. The system has reduced friction losses and increased eccentricity. It requires no grouting.

Single low relaxation PC 7-wire strands of 13mm or 15mm diameter are coated with permanent corrosion inhibiting grease and encased in High Density Polyethylene (HDPE) sheathing, continuously extruded over the entire strand length to form a single strand tendon. Tendons are laid in the slab according to specific profiles before pouring the concrete.

The grease reduces friction and allows (with the sheathing) for free relative movement of the strand with respect to the surrounding concrete during stressing. Both grease and sheathing provide long-term corrosion protection to the steel.The strands are individually attached at both ends to CCL Un-bonded mono strand anchorages that are embedded in the concrete to transfer compression to the slab after stressing.