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

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