Where are corner posts located on a container?

The correct choice identifies that corner posts are located at the four corners of the container. These structural elements are essential for providing strength and rigidity to the container. They are designed to withstand stacking loads and to assist in the handling of the container during loading and unloading operations.

Positioned at each corner, these posts help maintain the overall integrity of the container, enabling it to endure various stresses during transport. Corner posts are integral in securing the container to handling equipment such as cranes and container ships, as they often accommodate twist locks that ensure stability during transit. This positioning is crucial for both the safety of the goods being transported and the overall functionality of intermodal operations.