IS 3952:1988 is the Indian Standard (BIS) for burnt clay hollow bricks for walls and partitions - specification. This standard specifies the dimensions, physical requirements, and testing procedures for burnt clay hollow bricks used in load-bearing and non-load-bearing walls and partitions. It defines limits for compressive strength, water absorption, and efflorescence to ensure structural integrity and durability.
burnt clay hollow bricks for walls and partitions - Specification
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Compressive Strength (Typical Class) | Class 10 (Average not less than 10 N/mm²) | Manufacturer declares mean compressive strength, e.g., '10 N/mm²' (No predefined classes) | BS EN 771-1 |
| Max Water Absorption (24hr cold) | 20% by mass (for bricks of Class 10 and above) | Not directly specified; 17.0% by mass (by 5-hr boil for Grade SW) | ASTM C652-21 |
| Maximum Void Area | 45% of gross area | 60% of gross cross-sectional area | ASTM C652-21 |
| Minimum Shell Thickness (face) | 15 mm | 19 mm (3/4 in.) for Type HBS; 25 mm (1 in.) for HBX, HBA, HBB | ASTM C652-21 |
| Minimum Web Thickness | 10 mm | 19 mm (3/4 in.) on units with voids >25% gross area | ASTM C652-21 |
| Efflorescence Test Result | Rated as 'Slight', 'Moderate', or 'Heavy' | Rated as 'Effloresced' or 'Not Effloresced' based on visual inspection | ASTM C67 (Test Methods) |
| Length Tolerance | ± 5% | Category T2: ±4 mm for a 190 mm brick (declared by manufacturer) | BS EN 771-1 |