Schlechtnau bridge

StoCretec Structural Reinforcement: The Economic System Solution for Higher Load-bearing Capacity

The town Schlechtnau is located in the river plains of the Wiesental area and it is a part of the city of Todtnau in the district of Lörrach in Baden-Wuerttemberg, Germany. In order to reach the town area west of the river Wiese, residents and suppliers use the Kresselstrasse Bridge from the main road B 317.

The bridge has a span of 10,80 metres and is 3,70 meter wide. It was built in 1960 and was prohibited for vehicles weighing more than 16 tons. The town faced a major challenge by this restriction and by modern day usage, where a much greater weight limit was required for example to allow for material deliveries for construction works.

For this reason, the expert team consisting of the investor, planner and applicator decided to strengthen the bridge. The goal: Achieving the load capacity of bridge class SLW 30 for heavy goods vehicles with a total weight of 30 tons and more. The StoConcrete Carbon Plate reinforcement system with Sto S&P CFRP plates offered the best solution here: instead of expensive and time-consuming demolition and building new, the bridge was reinforced with Sto S&P CFRP plates. Before the specialist applicator bonded the CFRP plates, the areas of the existing bridge intended for the plates were sanded. According to the static calculations by Simpson Strong-Tie GmbH, Bad Nauheim (DE), the specialist applicator applied the CFRP plates and additionally increased their reinforcing effect by an anchoring bar.

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