Passerelle Marc Seguin
The Passerelle Marc Seguin between the French towns of Tournon-sur-Rhône ( Ardèche department ) and Tain-l'Hermitage ( Drôme department ) is a suspension bridge built by Marc Seguin over the Rhone between 1847 and 1849 , which was used as a road bridge. It is an enlarged and raised copy of the first suspension bridge in Tournon. Since the construction of the modern Pont Gustave Toursier bridge , it has been used as a pedestrian bridge.
Pont de Tournon
The first wire rope suspension bridge in Europe, the Passerelle de Saint-Antoine , was built by Guillaume-Henri Dufour in Geneva in 1823 based on a design by Marc Seguin . The French road and bridge administration showed great interest in a bridge over the Rhône in Tournon, but initially wanted a model test. After the 18 m long and 0.50 m wide suspension bridge built by Marc Seguin on his private property in Annonay had successfully passed all load tests, he and his brothers were commissioned to build the much larger Pont de Tournon , which in 1825 after only 18- month of construction was opened. It was Europe's first cable suspension bridge designed for road traffic. It was over 180 m long with a pylon in the middle of the river, which carried the supporting cables that were anchored in two piers on each of the river banks. The bridge thus had two sections with spans of around 90 m each.
The bridge marked the beginning of the construction of numerous suspension bridges in Europe - Marc Seguin and his brothers alone built 186 bridges in France.
However, the bridge was too low for steam shipping, which emerged two decades later. In 1847, a royal decree therefore forced the Seguin brothers to build a second, higher bridge and either demolish the first or convert it into a pedestrian bridge by removing the lower plate. The Seguins decided to preserve it and thus the bridge passage was increased.
In 1965, despite various protests, it was demolished for reasons of age.
Passerelle Marc Seguin
The second bridge was also built by the Seguin brothers between 1847 and 1849. It is essentially a slightly enlarged and raised copy of the first bridge. It served as a road bridge until 1958 when it was converted into a pedestrian bridge.
Pont Gustave Toursier
The increasing motor vehicle traffic required a significantly wider and more resilient bridge. In 1958, the 240 m long Gustave Toursier bridge in the form of a classic suspension bridge was built further downstream . Its two H-pylons in the river bed have a span of approx. 140 m and support a bridge deck with two lanes and two sidewalks. The bridge is the only road bridge between Saint-Vallier (16 km upstream) and Valence (19 km downstream).
Individual evidence
- ↑ The somewhat older suspension bridges in Great Britain were chain bridges, such as the Union Bridge or Thomas Telford's Menai Bridge
- ↑ Marc Séguin, Des ponts en fil de fer , 2nd ed., Paris, 1826, p. 40
- ↑ Passerelle Marc Seguin ( page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. (French)
- ^ Pont de Tournon. In: Structurae
- ^ Pont Marc Seguin. In: Structurae
- ↑ Pont Gustave Toursier. In: Structurae
Coordinates: 45 ° 4 ′ 7.4 ″ N , 4 ° 50 ′ 6 ″ E