A bridge whose main structures are cantilevers and are used to build girder bridges and truss bridges?

• A. Deck Bridges
• B. Cantilever Bridges
• C. Through Bridge
• D. Highway Bridge

Answer: (B)

Leveraging cantilever action means the main load-carrying members project outward from the supports, with parts of the structure balanced by counterarms. In a cantilever bridge, two cantilever arms extend from each pier and a suspended central span is added between them. This setup is especially practical for building longer spans and for assembling deck sections that include girder or truss configurations, because the cantilever arms carry part of the load while the suspended span completes the deck. So a bridge whose defining feature is cantilever main structures, used to form girder and truss decks, is best described as a cantilever bridge.

The other terms describe different aspects: a deck bridge refers to how the deck is supported, not the main structural system; a through bridge describes the arrangement of the deck relative to the supporting truss; a highway bridge simply indicates usage, not the structural type.