Brickwork is masonry produced by a bricklayer using bricks and mortar. Typically, rows of bricks called courses, which are laid on top of one another to build up a structure such as brick wall. Strength of brick wall depends upon their bond.
The arrangement of the bricks in successive courses tie the brickwork together both longitudinally and transversely ,the arrangement is usually designed to ensure that no vertical joint of one course is exactly over the one in the next course above or below it,and there is the great possible amount of lap.
An unbounded wall, with continuous vertical joints weakens the strength and stability of wall, such joints must be avoided.
Figure illustrates the comparative strength of a bonded wall and weaknesses of unbounded wall which are shown supporting a load.
The portion of the load transmitted to the wall A is distributed over a relatively large area as indicated within the broken lines whereas that transmitted to the wall B is particularly concentrated on the portion between the continuous vertical joints.
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