What is the term for block courses that allow one CMU wall to intersect another at a right angle?

The term that accurately describes block courses designed for one Concrete Masonry Unit (CMU) wall to intersect another at a right angle is "joined." This terminology is used in masonry to refer to how blocks are connected at corners or intersections, ensuring structural integrity and alignment.

In masonry practice, "joined" masonry often involves specific techniques and bonding patterns that facilitate a strong connection between intersecting walls, contributing to the overall stability of the structure. This method is crucial for managing load distribution and preventing structural weaknesses at these intersections.

The other terms don't accurately represent this specific configuration. For instance, "alternating" might refer to a pattern of laying blocks that alternates courses or rows, but it does not specifically pertain to the right-angle intersections of walls. "Layered" generally relates to different levels or layers used in construction rather than the joining of walls. "Fortified" typically implies additional structural support or enhancement, which is not directly related to the intersection of CMU walls at right angles. Thus, "joined" is the most appropriate term in this context.