The size of modular bricks are :
🧱 Understanding Modular Bricks
A modular brick is a brick whose dimensions have been standardized to ensure uniformity and ease of construction. The term "modular" implies that the brick's size, when combined with a standard mortar joint, creates a neat, round number that fits well into a larger grid or "module".
The question asks for the "size of modular bricks," which refers to the actual manufactured size of the brick itself, not including the mortar.
🔬 Detailed Analysis of the Options
B. 19 x 9 x 9 cm
This is the correct answer. As per the Bureau of Indian Standards (BIS), the standard size of a modular brick is 19 cm x 9 cm x 9 cm. This is also referred to as the "standard size" or "actual size".
A. 20 x 10 x 10 cm
This is the Nominal Size of a modular brick. It is the standard size (19x9x9 cm) plus a 1 cm mortar joint on each face. This size is used for estimating the number of bricks needed and for overall masonry dimensions, but it is not the actual size of the brick.
C. 22.5 x 10 x 8.5 cm & D. 22.5 x 8.0 x 9 cm
These are dimensions for non-standard or traditional bricks. Before the BIS standardized the size, bricks were made in various sizes across different regions. These are not the dimensions of a standard modular brick.
📊 Summary: Standard vs. Nominal Brick Size (India)
| Term | Dimensions (cm) | Description |
|---|---|---|
| Standard / Modular Size | 19 x 9 x 9 | The actual size of a single brick. |
| Nominal Size | 20 x 10 x 10 | The size of the brick plus the mortar joint. |
💡 Study Tips
- Modular = Standard: For exam purposes, "modular size" and "standard size" mean the same thing: the actual size of the brick.
- Think in 19s: The number 19 is the key to remembering the standard brick length. The other dimensions are roughly half of that (9 cm).
- Nominal is for Numbers: The nominal size (20x10x10) is a nice round number that makes calculations and estimations easy. It's the "number" you use for planning a wall.