Which element transfers the loads from the superstructure to the foundation soil or rock?

• A. Substructure
• B. Superstructure
• C. Bearings
• D. Cast-in-place Concrete

Answer: (A)

Understanding how loads travel from the upper structure down to the ground. The loads carried by the deck and framing must go through the substructure, which includes the piers, abutments, and foundations, to reach the foundation soil or rock. The substructure is the element that transfers those loads into the ground. Bearings sit between the superstructure and substructure to take and distribute vertical loads while allowing movement, but the final transfer to soil happens through the substructure and its foundations. Cast-in-place concrete is a material used in constructing these parts, not the transfer element by itself. The upper portion, the superstructure, supports the loads but does not deliver them to the ground without the substructure.