The preferred shape for columns is:

The preferred shape for columns is often square or circular due to their structural properties and ease of construction. Square columns are advantageous as they can be easily integrated into rectangular building designs, providing uniformity and maximizing usable space. Circular columns, on the other hand, are effective in distributing loads evenly around the column, which can enhance the structural integrity, especially in buildings experiencing lateral forces such as wind and seismic activity.

Both square and circular columns efficiently handle compressive forces and are easier to form and reinforce compared to more complex shapes. Their commonality in architectural design allows for simplicity in both construction and aesthetic coherence. Triangular and hexagonal shapes, while sometimes used in specialized architectural applications, do not provide the same level of versatility or structural efficiency for general column use as square and circular columns do.