For the renovation of the weir in Grave, we produced 22 frames on behalf of the contractor consortium Mourik Swarco. Each frame measures 16 meters in length, 2.8 meters in width, and weighs 12 tons.
These imposing steel structures play a vital role in the flood protection system of this national heritage monument and were manufactured in accordance with NEN EN 1090 EXC 3 and ROK 2.0, the Dutch Guidelines for the Design of Civil Engineering Structures.
While the overall design had largely been defined, we provided detailed advice on optimizations, including modified weld details to improve manufacturability and durability. Precision was also crucial during execution. Each frame was digitally measured, and the pivot points were line bored on site to an H7 tolerance, with an accuracy of one thousandth of a millimeter.
To ensure an efficient production process, we anchored a dedicated jig into the floor of our production hall. This guaranteed exact alignment for every assembly. Through an optimized routing within our workshop, we seamlessly coordinated the various operations, from welding to final assembly. This approach enabled us to deliver one complete frame per week, fully in line with the project schedule.
The first transport took place in May 2024 and the final delivery followed in October. A project in which technical challenges, logistical coordination, and craftsmanship came together.
An example of how Dijkstaal contributes to the infrastructure of the Netherlands with precision, speed, and reliability.
Watch the video here