Overpass A22

Today we inform you that on the Strade e Autostrade website there is talk of the launch of the overpass on the A22, in Egna.
A launch which, to avoid excessive obstructions to the road system, was carried out at night, and in a record time of around 3 hours.
To read the article and learn more about this last phase, here is the link: https://www.stradeeautostrade.it/ponti-e-viadotti/un-ponte-sopra-ladige/
Steel Project Engineering took care of the executive project and the assembly of the metal decks of this overpass.

Here is the project in brief:
The overpass on the A22 motorway at Egna is composed by a single span of 46 m with a bowstring arch with eliminated thrust supporting a 6.5m-wide carriageway, pedestrian walkway and cycle path.
It consists of a straight steel deck with an orthotropic plate, supported by a single arch, also in steel, inclined at 20° from the vertical and located laterally, in an eccentric position with respect to the longitudinal axis. The arch has an irregular pentagonal box and a jib of 7.5 m from the deck. The arch-bridge connection is made by means of welded double T-shaped hangers with variable section.
The deck consists of a multi-cellular caisson with 4 cores with a maximum height of 1.4 m with 3.3m pitch diaphragms. The cycle path and the pedestrian walkway, with a usable width of 2.8 m and 2.5 m, are supported by double T brackets with variable height, according to the pitch of the diaphragms.