Round 5: Tossup 4

A form of these structures which use a trunnion to move their leaves are their “bascule” type. Aeroelastic flutter can damage a type of these structures that can be self-anchored or earth-anchored. A type of these structures, which have stiffening girders and hangers, (-5[1])can be constructed (15[1])with minimal falsework. (-5[1])A fan of cables under tension connects the (*) deck to a central tower (10[1])in the “cable-stayed” type of these (10[1])structures. (10[1])Two cables (10[1])which form a catenary between two towers (10[1])support a form of these structures (10[3])with a long span. Viaducts (10[2])are a type of, (10[1])for 10 points, what structures with “suspension” (10[1])and “arch” types, (10[1])often used to cross rivers. ■END■ (10[2])

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