What is the basic module (M) for modular coordination in brickwork?

The basic module is 100 mm (Clause 4).

What is the standard manufacturing size of a modular brick?

190 mm x 90 mm x 90 mm (Table 1).

What is the standard modular size of a brick, including mortar joints?

200 mm x 100 mm x 100 mm (Table 1).

What is the recommended thickness for mortar joints in modular brickwork?

The nominal thickness is 10 mm (Clause 6.1).

IS 13612

: 2000

Modular co-ordination for normal brickwork - Recommendations, Part 1: Burnt clay bricks

CurrentFrequently UsedGuidelinesBIMArchitectural · Planning, Housing and Pre-fabricated Construction

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This standard provides recommendations for the dimensional coordination of brickwork using burnt clay bricks. It establishes a basic module of 100 mm and defines standard modular and manufacturing sizes for bricks to promote design flexibility, simplify construction, and reduce material waste on site.

Modular co-ordination for normal brickwork - Recommendations, Part 1: Burnt clay bricks

Quick Reference Values

Basic Module (M)100 mm

Standard Modular Brick Size (including mortar joints)200 mm x 100 mm x 100 mm

Standard Manufacturing Brick Size (work size)190 mm x 90 mm x 90 mm

Nominal Mortar Joint Thickness10 mm

Practical Notes

The core principle is that the manufacturing size (e.g., 190x90x90 mm) plus the nominal 10 mm mortar joint equals the modular size (200x100x100 mm).

Using modular bricks greatly simplifies setting out and reduces the need for cutting bricks, leading to faster and cleaner work.

Architects and designers should use modular dimensions (multiples of 100 mm) for openings and wall lengths to fully leverage the benefits of this system.