Civil Engineering Professional Engineer Practice Exam

What is the primary function of piers in bridge construction?

1. To connect the bridge to the ground

2. To provide aesthetic value

3. To transfer load into the ground

4. To support the roadway

The correct answer is: To transfer load into the ground

The primary function of piers in bridge construction is to transfer load into the ground. Piers serve as vertical support structures that bear the weight of the bridge and its loads, transferring these forces down to the foundation below. This process ensures that the bridge remains stable and safe under the loads imposed by vehicles, pedestrians, and environmental factors like wind or seismic activity. While piers do play a role in supporting the roadway and connecting the bridge to the ground, their main purpose is centered around load transfer. They are strategically positioned to distribute the forces effectively throughout the structure, ensuring that each load is handled appropriately and that the overall integrity of the bridge is maintained. Their design and placement are critical for the structural performance and safety of the bridge, making load transfer their primary function.