DYWIDAG Prestressing Systems using Bars
| Available Bonded Tendons | Anchor plate | 18 WR | 26 WR | 32 WR | 36 WR | 40 WR | 47 WR | 32 WS | 36 WS |
|---|---|---|---|---|---|---|---|---|---|
| Bonded bar tendon with QR-plate anchorage with additional reinforcement | 2074 | X | X | X | X | X | |||
| Bonded bar tendon with small solid rectangular plate anchorage with additional reinforcement | 2076 | X | X | X | X | X | X | X | X |
| Bonded bar tendon with QR-plate anchorage without additional reinforcement | 2074 | X | X | X | X | X | |||
| Bonded bar tendon with small solid rectangular plate anchorage without additional reinforcement | 2076 | X | X | X | X | X | X | X | X |
| Bonded bar tendon with solid square plate anchorage without additional reinforcement | 2011 | X | X | X | X | X | X | X | X |
| Bonded bar tendon with solid rectangular plate anchorage with additional reinforcement | 2012 | X | X | X | X | X | X | X | X |
| Available Unbonded Tendons | Anchor plate | 18 WR | 26 WR | 32 WR | 36 WR | 40 WR | 47 WR | 32 WS | 36 WS |
|---|---|---|---|---|---|---|---|---|---|
| Unbonded and external bar tendon with solid square plate anchorage without additional reinforcement | 2011 | X | X | X | X | X | X | X | X |
| Unbonded and external bar tendon with solid rectangular plate anchorage with additional reinforcement | 2012 | X | X | X | X | X | X | X | X |
Overview of anchorages
Stressing anchorage, bonded
The bar is fixed to the anchorage plate by the domed anchor nut and the retaining nut, the latter of which is fixed to the scaffolding. The retaining nut provides the connection to the duct. Grouting is performed through the grout cap, the domed anchor nut with the three grout slots and the retaining nut.
Fixed anchorage, bonded
Usually, the fixed anchorage is completely embedded in the concrete. The domed anchor nut is tack welded perpendicularly onto the anchor plate. The duct sleeve B ends directly at the anchor plate, where the duct is both injected and vented. A fixed anchorage can be designed as stressing anchorage; the required bar-over length for the stressing can be dispensed.
Stressing ancorage, unbonded
In order to prevent the intrusion of water in the anchorage region, a connection tube is welded to the anchor plate to bridge the gap behind the anchor plate. Different corrosion protection systems are available.
Fixed anchorage, unbonded
Usually, the fixed anchorage is completely embedded in the concrete. The domed anchor nut is tack welded perpendicularly onto the anchor plate. The prestressing bar is provided with the respective corrosion protection. The fixed anchorage can also serve as unbonded stressing anchorage.
