Standard brick size in construction plays a crucial role in ensuring structural stability, uniform masonry work, accurate quantity estimation, and cost-effective construction. In India, brick dimensions are standardised under IS Codes to maintain consistency and quality across building projects.
This article explains the standard brick size in construction as per IS Code, including modular and non-modular brick dimensions, permissible tolerances, and practical site notes based on real construction practices. Whether you are a civil engineer, site supervisor, student, or contractor, this guide will help you understand brick sizing requirements clearly and apply them correctly on site.
What Is the Standard Brick Size?
Standard Brick Size refers to the uniform, officially specified dimensions of a brick used in building construction to ensure structural stability, consistent masonry, and accurate material estimation. As per IS codes, a standard modular brick measures 190 × 90 × 90 mm without mortar, and 200 × 100 × 100 mm including a 10 mm mortar joint.
Also, Read: Types of Bricks Used in Building Construction: 6 Types of Bricks
Standard Brick Size as per IS Code
As per IS 3495 (Part 1 to 4) and IS 2212, bricks used in building construction are categorised into:
- Modular bricks
- Non-modular bricks
Modular Brick Size (As per IS 3495)
| Description | Size (mm) |
|---|---|
| Brick size without mortar | 190 × 90 × 90 mm |
| Brick size with mortar | 200 × 100 × 100 mm |
Non-Modular Brick Size
| Description | Size (mm) |
|---|---|
| Brick size without mortar | 230 × 110 × 75 mm |
Permissible Tolerance in Brick Size (IS Code)
As per IS specifications, bricks are permitted only limited dimensional variations. Maintaining these tolerances ensures uniform masonry, proper bonding, and structural stability. Excessive deviations from the standard dimensions can result in uneven walls, increased mortar consumption, and weak masonry joints.
The permissible tolerance for brick size is as follows:
| Dimension | Permissible Variation |
|---|---|
| Length | ±3% |
| Width | ±3% |
| Height | ±3% |
Standard Brick Size in Other Units
Brick Size in Inches (Modular)
- 7.5 × 3.5 × 3.5 inches (approx.)
Brick Size in Centimetres
- 19 × 9 × 9 cm (without mortar)
- 20 × 10 × 10 cm (with mortar)
Standard Brick Size for Load-Bearing and Partition Walls
| Wall Type | Brick Thickness |
|---|---|
| Load-bearing wall | 230 mm (1 brick thick) |
| Partition wall | 115 mm (½ brick thick) |
| Cavity / lightweight wall | As per design |
Number of Bricks per Cubic Meter
Modular Bricks:
- 500 bricks per cubic meter of brick masonry (including mortar)
- Volume of 1 brick=0.20×0.10×0.10 =0.002m3
- Number of Bricks in 1 Cubic Meter of Brick Masonry =\(\frac1{0.002}\) =500 bricks
Without Mortar:
- Approximately 550 bricks per m³
Practical Tip:
For practical site execution, it is recommended to consider about 5% wastage while estimating the quantity of bricks. This allowance accounts for breakage during loading and unloading, transportation, handling at the site, cutting during masonry work, and bricks damaged during field testing, thereby avoiding shortages and delays in construction.
Key Notes for Site Engineers
- Modular bricks are preferred for modern construction due to ease of planning.
- Non-modular bricks are mostly used in older or traditional buildings.
- Verify size consistency on site before laying walls.
- Proper brick size reduces excess mortar, uneven walls, and plaster wastage.
- Follow IS 2212 for proper brick masonry practices.
Also, Read: How to Calculate The Number of Bricks in Masonry.
FAQs
Q1. What is the standard brick size in construction as per IS Code?
Answer: The standard brick size in construction as per IS Code for modular bricks is 190 mm × 90 mm × 90 mm without mortar. With a standard 10 mm mortar joint, the nominal brick size becomes 200 mm × 100 mm × 100 mm, as specified in IS 3495 and IS 2212.
Q2. What is the standard brick size with mortar?
Answer: The standard brick size with mortar is 200 mm × 100 mm × 100 mm. This includes a 10 mm thick mortar joint on all sides and is commonly used for estimating brickwork quantities and wall dimensions.
Q3. How many bricks are required per cubic meter of brick masonry?
Answer: Approximately 500 modular bricks are required for 1 cubic meter of brick masonry, including mortar. Without mortar, around 550 bricks per cubic meter may be required.
Q4. What is the difference between modular and non-modular bricks?
Answer: Modular bricks have standardised dimensions of 190 × 90 × 90 mm, allowing uniform construction and easy planning. Non-modular bricks typically measure 230 × 110 × 75 mm and are commonly found in older or traditional constructions.
Q6. Why is the standard brick size important in construction?
Answer: Standard brick size ensures structural stability, uniform bonding, accurate quantity estimation, and controlled construction costs. It also helps maintain proper wall thickness and reduces excess mortar and plaster consumption.
References:
- Bureau of Indian Standards. (2019). IS 3495 (Part 1): Burnt clay building bricks — Methods of tests: Determination of compressive strength. Bureau of Indian Standards.
- Bureau of Indian Standards. (2019). IS 3495 (Part 2): Burnt clay building bricks — Methods of tests: Determination of water absorption. Bureau of Indian Standards.
- Bureau of Indian Standards. (2019). IS 3495 (Part 3): Burnt clay building bricks — Methods of tests: Determination of efflorescence. Bureau of Indian Standards.
- Bureau of Indian Standards. (2019). IS 3495 (Part 4): Burnt clay building bricks — Methods of tests: Determination of warpage. Bureau of Indian Standards.
- Bureau of Indian Standards. (1991). IS 2212: Code of practice for brickwork. Bureau of Indian Standards.
- Duggal, S.K. (2008). Building materials. New Age (P) International Publishers
- B, B. (2016). Basic Civil Engineering: Civil. CreateSpace Independent Publishing Platform.
