Which direction can a jamb allow blocks to be laid?

A jamb in masonry typically refers to the vertical sides of an opening, such as a doorway or window, where blocks can be placed. The orientation and layout of blocks in relation to the jamb primarily provide stability and structural integrity, which is best achieved by laying them in one consistent direction. This uniformity ensures that the weight and forces acting on the masonry are evenly distributed, minimizing the risk of structural failure.

While it might appear that laying blocks could be possible in multiple directions, the construction practices and structural principles dictate that a single direction—either vertically or horizontally in relation to the jamb—ensures a stronger, more reliable wall assembly. Therefore, the specificity of laying blocks in one direction aligns with best practices in masonry to achieve effective load-bearing outcomes.