Unbonded External Post-tensioning
DYWIDAG external unbonded post-tensioning systems strengthen wide-span bridges and wind towers.
DYWIDAG external post-tensioning systems use tendons with strands and wires—or DYWIDAG Threadbars™.
External unbonded post-tensioning systems are used in
External strands and wires : Typical applications for external tendons with strands and wires include bridge construction, where they are used as longitudinal tendons between bulkheads, and in the pre-stressing of concrete and hybrid wind towers, where they are used as vertical tendons. External mono-strands: Special applications for external mono-strands include round tank walls. The tendons form a closed ring arranged in either a circular or semicircular pattern. A circular arrangement is also possible using a single-strand floating coupler.
External DYWIDAG bars: A significant field of application here is in increasing the shear capacity of structures where bar tendons are arranged vertically outside webs—to replace any missing stirrup reinforcement.