A condition for the Ceramique bridge over the Maas at Maastricht was, that the bridge should not be seen on radar.
Therefore the bridge is built up with skew planes.
The curved bottom was not only effective for radar, but also for production.
This resulted in a 20% cheaper bridge.
To prevent that the bridge which was not dominant in the Ceramique-complex, the arch was "tended" to the uther side of the river. De arch and the suspension bars are asymmetric - drawn by hand - which resulted in a more soft and natural way. Due to modern computer simulation this mathematic failure can be corrected.