Composite Girder Grid (VTR®) Construction Method

An economic modular construction system with a high degree of prefabrication for short construction times of adaptive bridges.

Here you can watch a 360° view and different perspectives of the VTR® construction method in our interactive visualisation. Under ‘Aufbau’ the construction process is shown.

On air-tightly welded longitudinal girders that are simple to fabricate, prefabricated reinforced concrete girders are placed at the plant. The remaining space on the upper chords is then concreted so that a first composite effect with material-saving advantages is created. On this girder grid with its (first) composite effect, (fully) prefabricated elements made of reinforced concrete are assembled and completed by in-situ concrete in the grouting joints.

This composite girder grid method (VTR®) developed by SSF Ingenieure AG has the benefit of achieving a high economic and ecologic quality by efficient construction time, small need of space on the construction site, very economic material use, high durability and simple adaptability to future requirements.

Everything starts with dialogue

As result of our efforts to implement completly integrated solutions as added value for our customers, we have established, together with our business partners, a cooperation network and well-fuctioning working alliances.


The pilot project Bridge Greisselbach is a new bridge concept including prefabricated carriageway segments, which are assembled without sealing or road surface

Interactive visualization of the principle of  VTR®-Construction Method