Final answer:
A brick laid across two wythes of masonry is defined as a header, which binds the wythes together for structural stability.
Step-by-step explanation:
The definition of a brick laid across two wythes of masonry is a header. In the context of brick construction, a header is a brick laid flat with its end visible on the face of the wall, spanning across two wythes to bind them together for added structural stability.
This technique is used in various masonry patterns to create strong, long-lasting structures.
A brick laid across two wythes of masonry is called a header. In masonry construction, a wythe refers to a vertical layer of masonry units, such as bricks or stones.
A header is a brick that is laid with its end facing outwards, perpendicular to the wall, connecting two wythes together. This technique provides structural stability and strength to the masonry wall.