Which type of deck uses flat, thin, steel plates stiffened with closely spaced longitudinal steel ribs and a wearing surface?

The type of deck being described is an orthotropic deck. This design features flat, thin steel plates that are supported and strengthened by closely spaced longitudinal steel ribs. The purpose of these ribs is to enhance the stiffness and load-carrying capacity of the deck while minimizing the weight of the structure. Additionally, an orthotropic deck typically includes a wearing surface designed to provide durability and protect the underlying steel components from environmental factors and wear over time.

In contrast, a box girder deck consists of structural elements shaped like a box that provides strength and stability but is not characterized by the thin, flat plates used in orthotropic decks. A composite deck usually integrates concrete with steel elements for added strength but does not have the same flat plate configuration. Lastly, a prestressed concrete deck involves the use of prestressing techniques to enhance its load-bearing capabilities, differing fundamentally in material and design from orthotropic decks.