This standard specifies the dimensions, quality, classification, and physical requirements (such as compressive strength, water absorption, and efflorescence) for common burnt clay building bricks. It is universally used by engineers and contractors for quality control of bricks on construction sites.
Specifies dimensions, quality, and physical requirements for common burnt clay building bricks.
Quick Reference Values
Standard modular brick size190 mm x 90 mm x 90 mm
Standard non-modular brick size230 mm x 110 mm x 70 mm
Minimum average compressive strength3.5 N/mm²
Max water absorption (Up to Class 12.5)20% by mass
Max water absorption (Above Class 12.5)15% by mass
Frog depth10 mm to 20 mm
Practical Notes
Dimensional tolerances should be checked by placing 20 bricks in a row, not by measuring individual bricks.
A frog is usually not provided for bricks of 40 mm or 30 mm height, or for extruded bricks.
Always ensure efflorescence testing is done before bulk approval to prevent future paint and plaster peeling issues.