Strands or ThreadbarsTM are used in new construction—as well as to enhance or repair infrastructure—by the dependable and long-lasting bonded post-tensioning systems.
The systems can be applied to concrete floor slabs in multi-story buildings and provide transversal post-tensioning, longitudinal stressing of bridge girders, transversal stressing of bridge decks, and concrete floor slabs.
The post-tensioning of concrete bridges, slab decks, and confinement structures like LNG tanks uses bonded post-tensioning strand systems.
Existing concrete structures are strengthened using bonded post-tensioning bar systems, which also join precast members and produce the fixation or tieback anchorages for steel constructions.
For tendons longer than about 2.5 m, bar type WR is available for all bar diameters and offers a continuous coarse thread over the entire length. Low losses of prestressing force are already possible due to the low-slip anchorage with nuts. Bars less than roughly 2.5 m in length, however, require bar type WS with a smooth surface and machined fine thread on both ends for the least amount of slip after lock-off.
