Inverted T-beam constructions - ZIPXL

With ZIPXL inverted T-beams, bridge solutions are created with very low material use. The bridge deck is built up by placing multiple beams next to each other. The beams are connected to each other into a grid by means of transverse end beams and a compression layer to be cast in place. There are gaps in the ends of the beams for the transverse support reinforcement to be fed through.

The ZIPXL inverted T-beam system has been developed for bridges with spans of 20 to 60 metres and is perfect for road and rail bridges. The system can be used for statically determinate and statically indeterminate constructions. A design with a statically determinate construction is preferred because large support point moments often occur in statically indeterminate constructions as a result of settlement, temperature effects, shrinkage and creep.
With larger spans where no collision loading can occur, it can be economical to install the beams with greater centre-to-centre spacing.

The ZIPXL beams are applied in the height series 700 to 2400 mm and have a functional width of 1500 mm.

The ZIPXL beam comes in two versions with associated height series:

  • The ZIPXL700 - 1700 series has an inverted T-profile and the compression layer is 230 mm thick. For railway bridges, the necessary compression layer is 260 mm thick.
  • The ZIPXL 1800 – 2400 series has an I-profile, the compression layer is applied directly onto the top flange of the beam so that lost formwork can be omitted. The necessary compression layer is 200 mm thick. In railway bridges, the compression layer is 230 mm thick.

Also visit our Knowledge Portal for all the technical data on our bridge solutions.

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