The bridge type where the deck is located on the bottom of the main structure?

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

Answer: (A)

The key idea is how the traffic surface (the deck) sits relative to the main structural members. In a deck bridge, the road deck is the bottom element, carrying the traffic, with the main framing (girders or trusses) rising above it to support the deck. This makes the deck the lowest part of the bridge’s main structure, which matches the description of the deck being located on the bottom. The other types describe different arrangements: a through bridge carries traffic within the framework between the vertical/bracing elements, cantilever bridges rely on projecting arms to support the deck, and highway bridge is a broad usage term rather than a specific deck-location arrangement.