In the item-number list, which component uses number 60?

• A. Deck
• B. Substructure
• C. Culvert
• D. Superstructure

Answer: (B)

In this item-number coding system, each major bridge component is assigned a specific code to standardize inspections and reporting. The substructure is the group that includes the parts that support the load from the deck and transfer it down to the foundation—think abutments, piers, foundations, and bearings. That category is the one designated by the code used for the item in question, so when you see an observation logged under that code it refers to substructure elements. Deck refers to the roadway surface, culvert to drainage conduits under the road, and superstructure to the main load-bearing members above the deck; those categories have their own codes and are not the one used for the substructure.