Civil Engineering Professional Engineer Practice Exam

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Which of the following is NOT a main component of suspension bridges?

Towers
Main cables
Anchorages
Foundations

The correct answer is: Foundations

In the context of suspension bridges, the three primary components that are essential to their structure include towers, main cables, and anchorages. Towers provide the necessary elevation to support the main cables, which carry the weight of the bridge deck. The anchorages serve to secure the ends of the main cables, ensuring that the tension created by the weight of the bridge and live loads is properly balanced. While foundations are indeed crucial to any bridge structure, as they transfer loads to the ground, they are not specifically a distinctive component of the suspension system itself. Foundations support all types of bridges and, therefore, are not unique to suspension bridges. Thus, while foundations are essential for the overall stability and support of a suspension bridge, they do not fall into the category of the primary structural components that define the suspension bridge design.