Construction engineering of Thotsamarachan Bridge, the cable-stayed bridge crossing Chao Phraya River next to the existing Rama IX bridge.

It has a main span of 450 m and total length 781.2 m with a composite girder. Services include stage-by-stage analysis of the bridge during construction, pre-camber analysis and geometry control, technical advice on wind tunnel test, inspection and maintenance manual, and definition and budget of the bridge monitoring system.