The bridge spans the Paznaun valley and Trisanna gorge, forming part of one of the most important east-west railway routes in the Alps.

[2] Huss had many challenges, including the exposed and mountainous location, and the need to make sure the bridge was properly able to withstand the considerable braking forces from trains descending the valley.

The completed scaffolding piers, which were then joined together to make one massive tower, weighed a total of 1,359 tonnes (1,359,000 kg).

[4] By 1964, the requirements of modern railway traffic meant the bridge was not capable of carrying the many local, intercity and cross-border services that were using the Arlberg line, so Waagner-Biro was contracted to replace the main span, and to strengthen the masonry piers that support it.

So not to disrupt the busy workings of the railway, the new main span was constructed on a raised platform nearly 90 metres (300 ft) above the valley floor, parallel to the bridge.