What is unique about a corner block in masonry?

In masonry, a corner block is specifically designed to facilitate the construction of corners in a wall. The defining feature of a corner block is that it typically has one recessed end, which allows it to fit seamlessly at the junction where two walls meet. This recessed end provides an aesthetic and functional advantage, as it helps in achieving a smooth transition between the two walls. The three smooth shells of the block contribute to its structural integrity and visual appeal.

The design of a corner block is crucial for ensuring stability in a wall system, as it connects and reinforces the vertical and horizontal elements of the structure. Therefore, the characteristics of having one recessed end and three smooth surfaces are what make this type of block unique and essential for effective corner construction in masonry work.