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Development of a new bridge construction method using suspension structures A unique suspension method developed over a period of more than 10 years produces a rational structure in the form of a single-span composite truss bridge. For this structure, the steel truss and concrete deck are constructed on the spanning cables. During construction the horizontal forces of these cables are anchored into the ground, but after completion of the bridge the forces are transferred to concrete upper and lower chords as prestressing forces. A single-span composite truss bridge of this type can be constructed without temporary supports or falsework. Using this method to bridge a deep valley produces benefits in terms of both construction costs and sustainability. A single- span bridge requires less excavation than other bridge types, and utilizing a composite truss with this construction method can minimize the environmental impact of the construction. Keywords: composite truss, double suspension structure, environmental impact 10.1002_suco.201000002-.pdf