In recent times, we have seen a drastic transition from brick masonry to concrete block masonry due to its numerous advantages such as fire resistance, good acoustic performance, cost-efficiency, and strength.

Hollow and solid concrete blocks shall be sound and free from cracks, broken edges, honeycombing, and other defects that would interfere with the proper placing of block or impair the strength or performance during construction.

The concrete block units shall be made in sizes and shapes to fit different construction needs.  They include stretcher, corner, double corner or pier, jamb, header, bullnose, and partition block, and concrete floor units.