course

In masonry and bricklaying, a course is a single horizontal line of bricks, stones, or concrete blocks laid across a wall or structure. Each course is typically one unit in height, plus the thickness of mortar joints. A brick course might be roughly 75 mm tall; a stone course varies by the material selected. Courses stack vertically to build the full height of a wall.

The term applies across multiple materials. In brickwork, courses are counted by the number of bricks visible from outside the wall face. In asphalt paving, a course is a single layer of material laid in the construction sequence, such as a base course, binder course, or wear course. In textile manufacturing, a course is a horizontal row of stitches or loops in knitted fabric, perpendicular to the wale. The principle remains the same: horizontal repetition creates structure.

Builders use course numbering to manage construction and plan openings. A window might begin at course 8 and span 12 courses upward. Specifications call out brick type and mortar strength per course. In asphalt construction, each course has its own aggregate size, binder content, and compaction requirements. Courses are laid in sequence; one course must set or cool before the next begins, affecting schedule and quality control.

Problems in a course propagate. Misaligned bricks in one course create problems in the next. Inadequate compaction of a base course in asphalt leads to rutting and cracking above it. Mortar joints that are too thick or too thin throw off future courses and compromise the bond pattern. Quality depends on consistency across every course.

The word comes from Old French cours, meaning a line or path. In medieval masonry, the term took on its spatial meaning: the path a row of stones follows across a wall. Today, course remains standard vocabulary in construction drawings, material takeoffs, and site supervision.