The Sabiñánigo Viaduct over the Gállego and the Aurín rivers on the A-23 highway is a structure933.70 m long and 25.10 m wide, with spans of 9x90+74+49.7. The deck is a prestressed concrete box girder with large lateral cantilevers supported by prefabricated struts, and a variable depth from3.20 m in the center of the span (L/28.1) to 5.50 m in the support section (L/16.4). It is notable for its 90-metre typical span, whose box girder is executed by means of a movable-scaffolding-system (MSS), which represents a world record (shared with a viaduct on the Ankara-Istanbul railway line, but with a greater weight than the latter). The cantilevers are built in a second phase by means of a wing traveller.
Cornejo et al. (Wed,) studied this question.