DYWIDAG-SYSTEMS INTERNATIONAL
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DYWIDAG Prestressing Systems using Bars - schema

DYWIDAG Prestressing Systems using Bars

System overview

Available TendonsAnchor plate18 WR26 WR32 WR36 WR40 WR47 WR32 WS36 WS
Bonded bar tendon with QR-plate anchorage with additional reinforcement 2074
Bonded bar tendon with small solid rectangular plate anchorage with additional reinforcement 2076
Bonded bar tendon with QR-plate anchorage without additional reinforcement 2074
Bonded bar tendon with small solid rectangular plate anchorage without additional reinforcement 2076
Bonded bar tendon with solid square plate anchorage without additional reinforcement 2011
Bonded bar tendon with solid rectangular plate anchorage with additional reinforcement 2012
Unbonded and external bar tendon with solid square plate anchorage without additional reinforcement 2011
Unbonded and external bar tendon with solid rectangular plate anchorage with additional reinforcement 2012

Overview of anchorages

DYWIDAG Bonded Stressing Anchorage

Stressing anchorage, bonded

  1. anchor plate
  2. domed anchor nut
  3. prestressing bar WR/WS
  4. retaining nut
  5. sealing ring
  6. grout cap
  7. toroidal ring
  8. hex nut
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.
DYWIDAG Bonded Fixed Anchorage

Fixed anchorage, bonded

  1. anchor plate
  2. domed anchor nut
  3. prestressing bar WR/WS
  4. duct sleeve B
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.
DYWIDAG Unbonded Stressing Anchorage

Stressing ancorage, unbonded

  1. anchor plate with connection tube
  2. domed anchor nut
  3. prestressing bar WR/WS
  4. heatshrinking sleeve
  5. tube
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.
DYWIDAG Unbonded Fixed Anchorage

Fixed anchorage, unbonded

  1. anchor plate
  2. domed anchor nut
  3. prestressing bar WR/WS
  4. heatshrinking sleeve
  5. tube
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.
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