Arched truss bridge

Burr s Course on the Stresses in Bridges and Roof Trusses, Arched Ribs, and... 

Both suspension and cable-stayed bridges are supported by abutments or piers at the point at which these structures transition to an approach roadway or to an approach structure. Abutments are discussed in Chapter 6. Piers and columns that support the superstructure for other types of bridge structures, such as girders, trusses, or arches, usually do not project above the deck. Piers and columns are discussed in Chapter 2. 

---