Which bond pattern utilizes a header course repeated at regular intervals?

The correct answer is the common bond. The common bond pattern, also known as American bond, features a unique structure where a header course is introduced at regular intervals, usually every fifth or sixth course. This alternating pattern of headers and stretchers adds strength and stability to the wall, making it particularly suitable for load-bearing applications.

This bond pattern strikes a balance between aesthetic appeal and structural integrity, allowing for better resistance to cracking and shifting compared to a simple running bond, which consists solely of stretchers in a continuous line. Flemish bond, while also visually appealing, does not systematically include header courses at regular intervals. Stack bond consists of courses stacked directly on top of one another without any overlapping bricks, which does not provide the stability that header courses provide in the common bond.