What is the primary function of a concrete pile cap?

The primary function of a concrete pile cap is to join the heads of the piles and distribute the load from the superstructure above to the pile foundations below. This is crucial in ensuring that the loads are evenly transmitted to the piles, which helps to prevent uneven settlement and failure of the foundation system. The pile cap acts as a structural element that provides stability and strength to the foundation, particularly in conditions where the soil may be weak or variable in bearing capacity.

Concrete pile caps are designed to accommodate various pile arrangements and load conditions, allowing them to effectively transfer loads from the structure while maintaining structural integrity. This function is essential for the overall performance of the building or structure being supported, especially in heavy-load scenarios or seismic regions.

In contrast, while some options may outline attributes that can be associated with foundations in general, they do not reflect the primary purpose of a pile cap, which is fundamentally about load distribution and structural connection.