Location: Istanbul, Türkiye
Client: IHI Corporation
Scale: 414 m long, 32.5 m wide, precast T-beam girder viaduct

This precast T-beam viaduct was 414 m long and 32.5 m wide. Both V408 and V409 viaducts are located on the European side of Istanbul and serve as extensions of the First Bosphorus Bridge.

Services provided included quality control, project management, construction supervision, and the adaptation of design and erection documents to local conditions. The work involved reinforcing piers, replacing the elastomer bearing, expansion joint, and parapet, installing a falling-down prevention device and damper, and expanding the pier foundations.