Pietralata overpass (Italy)

The Pietralata overpass is located in Pietralata in Rome and acts as a link between the access and exit ramps of Via dei Monti Tiburtini.

The structure has a U-shape in plan given a circular sector with a width of about 220 degrees and an average radius of curvature equal to 44 meters, between 30 meters on the inside and 53 meters on the outside.

The structural solution adopted consists of a main metal caisson, with an orthotropic slab deck, on which the main traffic lanes are located. The width of the carriageway is 8.6 meters. Orthogonally to the axis of the deck are grafted shelves (about 8 meters), which support an external cycle-pedestrian path. The metal deck is supported by a system of two pairs of 2 lower struts and 4 stays, each converging on a main antenna. The struts converge at the base of the antennas, while the stays converge at the top. The antenna is inclined by about 25 ° with respect to the vertical axis, so as to partially align with the axis of the stays. The section of the antenna is truncated-conical, variable. The section of the lower struts is circular with a constant diameter of 0.6 meters