Coastal and Floodplain Construction Inspector's Practice Exam

What material should pile caps be made of?

1. A. Wood

2. B. Reinforced concrete

3. C. Composite material

4. D. Steel

The correct answer is: B. Reinforced concrete

Pile caps should be made of reinforced concrete due to its strength, durability, and ability to withstand the loads and forces typically associated with coastal and floodplain construction. Reinforced concrete combines the compressive strength of concrete with the tensile strength of steel reinforcing bars, making it ideal for applications where considerable structural integrity is necessary. This is particularly important in areas prone to fluctuating water levels, soil saturation, and other environmental stresses that can affect the stability of structures. Using reinforced concrete for pile caps also ensures compatibility with various foundation types and offers excellent resistance to environmental degradation, which is crucial in coastal areas where exposure to moisture and saline conditions is common. In contrast, while wood may seem viable, it can deteriorate over time due to exposure to water and pests, making it unsuitable for long-term structural use. Composite materials and steel may provide specific advantages in certain applications, but reinforced concrete is the most widely accepted choice for pile caps in floodplain construction due to its overall performance characteristics and reliability in challenging environmental conditions.