Which bridge type is described as the deck placed on the top of the main structure?

• A. Deck Bridges
• B. Through Bridge
• C. Half-Through Bridge
• D. Straight Bridges

Answer: (A)

The key idea is how the roadway sits relative to the supporting framework. In a deck bridge, the deck (the driving surface) is placed on top of the main structural elements, so the roadway is the uppermost part and the trusses or girders lie beneath it. This is what the description “the deck placed on the top of the main structure” refers to. In contrast, other bridge types place the road path through or between the structural elements, or aren’t standard terms for deck placement, so they don’t match the described arrangement.