What purpose does a pile cap serve in construction?

• A. Foundation stabilization
• B. Prevents erosion
• C. Connecting multiple piles
• D. Distributes load across a foundation

Answer: (C)

The purpose of a pile cap in construction is primarily to distribute load across a foundation. This structural element sits on top of a group of piles or individual piles and serves to evenly distribute the loads from the superstructure above to the piles below. This load distribution is crucial in ensuring that the piles are subjected to similar stress levels and that no single pile is overloaded, which could lead to structural failure.

In scenarios where multiple piles are used, a pile cap enhances the load-bearing capacity of the overall foundation system and increases the stability of the structure as it helps to maintain the alignment of the piles. Additionally, by providing a solid and level surface for the structure above, it helps with stability against lateral forces such as wind or seismic activity.

While it is true that a pile cap connects multiple piles, its primary function is to distribute loads effectively, making it an essential element in the foundation design, particularly in deep foundations subjected to significant loads.