Computer-aided design of these structures can use a LUSAS (“lusas”) software package named for them. James Warren is best known for patenting a ubiquitous design of these structures. (10[1])Arup added 89 dampers to one of these structures (10[1]-5[1])after synchronous (-5[1])lateral excitation (10[3]-5[1])caused its 2000 opening (10[1])to be pushed back. (10[3]-5[2])Aeroelastic (10[1]-5[1])flutter, (10[1])not resonance as commonly (-5[1])believed, (10[3])was the cause (10[1])of the 1940 (10[3]-5[1])rupture (10[2])of one of these (10[1])structures (10[3]-5[1])in Tacoma. (10[6]-5[2])A (10[1])triangular (10[5])truss (10[2])is often (10[2])used (10[1])in these structures (10[2])to mitigate (10[1])buckling. (10[3])Unlike in a viaduct, (10[1])a catenary is formed by the cable that supports the deck of the suspension type (-5[1])of these structures. (10[3])For 10 points, name these structures that span a river. ■END■ (10[3])