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CE Approved

Assembly, Installation & Site-stressing

Structural bar system tendon adjustment data (in mm)

  Units M12 M16 M20 M24 M30 M36 M42 M48 M56 M64 M76 M90 M100
Fork - fork +/- mm 15 15 15 20 20 20 25 25 - - - - -
Per turnbuckle +/- mm 25 25 50 50 50 50 50 50 50 50 50 50 50

Structural Bar System Site Installation

Fork-fork tendon:-

Fork to Fork adjustmentFor rapid installation on site DST520 tendons are pre-assembled in the factory and set to their normal pin-pin length. The tendons are then ready for immediate incorporation into the structure and generally require no site assembly, saving valuable time.

To install, follow the steps below:

  1. Back off lock covers
  2. Install tie rods and pins
  3. Adjust to length-torque to required value if required
  4. Tighten lock covers

For extra security the pin end caps can be secured using a chemical locking compound (such as 'Loctite') on the counter sunk set screws.

Forks are generally drilled with a blind hole to prevent any run-off from the bars. The lock cover/bar opening can be sealed with a proprietary exterior silicon sealant if required.

Fork-turnbuckle-fork tendon:-

Fork to Fork with turnbuckle adjustmentTendons longer than 12m will be split into transportable lengths and some
site assembly will be required.

Ensure all components are fitted to the bar
and the nominal pin-to-pin length has been set.

To install, follow the steps below:

  1. Back off turnbuckle locking thread covers
  2. Install tie rods and pins, tighten fork lock covers
  3. Adjust tendon length with turnbuckle-torque to required value if necessary
  4. Tighten turnbuckle lock covers

For extra security the pin end caps can be secured using a chemical locking compound (such as 'Loctite') on the counter sunk set screws.

Forks are generally drilled with a blind hole to prevent any run-off from the bars. The lock cover/bar opening can be sealed with a proprietary exterior silicon sealant if required.

Site-stressing:-

Certain applications may require tendons to be stressed after installation. This can be performed providing that  jacking turnbuckles have been specified. Daver Steels can offer a robust and easy-to-use range of jacking equipment to provide a simple solution to the stressing of tendons which can be performed by competent steel erectors.

Please contact Daver Steels sales office for further information.

Site pre-stressing assembly