What is the basic module (M) used in this standard?

The basic module is 100 mm, denoted as 'M' (Clause 4.1).

What is the recommended standard size for a main residential door?

A common co-ordinating size is 1000 mm x 2100 mm (10M x 21M), or 1200 mm x 2100 mm (12M x 21M) as per Table 1.

What is the difference between 'co-ordinating size' and 'work size'?

Co-ordinating size is the theoretical dimension of the space allocated for the component, including tolerances. The work size is the actual manufactured size of the component, which is smaller to fit into that space (Clause 3).

Are the sizes in this standard mandatory?

No, the title states these are 'Recommendations'. They are intended to promote standardization but are not mandatory unless explicitly required by a project's specifications.

IS 12073

: 1987

Recommendations for modular co-ordination: Co-ordinating sizes for door sets and window sets

CurrentSpecializedGuidelinesBIMArchitectural · Planning, Housing and Pre-fabricated Construction

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This standard provides recommendations for a coordinated system of sizes for door and window sets based on the principle of modular coordination. It aims to rationalize building design and facilitate the use of prefabricated components by specifying preferred dimensions in multiples of a 100 mm basic module.

Recommendations for modular co-ordination: Co-ordinating sizes for door sets and window sets

Quick Reference Values

Basic Module (M)100 mm

Tolerance for Work Size (Doors/Windows)10 mm less than co-ordinating size

Preferred Door Height Increment1M (100 mm)

Preferred Window Width Increment1M (100 mm)

Common Residential Door Size (Co-ordinating)1000 mm x 2100 mm

Common Room Door Size (Co-ordinating)900 mm x 2100 mm

Practical Notes

The 'co-ordinating size' is the theoretical grid space for the opening, while the 'work size' (actual component size) is typically 10mm smaller to allow for joints and tolerances during installation.

Adhering to these sizes greatly simplifies the specification and procurement of doors/windows from different manufacturers and reduces on-site modification and waste.

These recommendations are the foundation for creating standardized door and window families in BIM software, promoting interoperability and efficiency in digital design.