IS 7564 (Part 4) : 2000Recommendations for co-ordination of dimensions in buildings-Arrangements of building components and assemblies, Part 4: Functional group 4 services and drainage
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IS 7564:2000 (Part 4) is the Indian Standard (BIS) for recommendations for co-ordination of dimensions in buildings-arrangements of building components and assemblies, part 4: functional group 4 services and drainage. This standard (Part 4) provides recommendations for dimensional coordination of services and drainage systems like plumbing, electrical, and HVAC within buildings. It establishes a system of preferred dimensions, zones, and routes based on a 100 mm basic module to ensure compatibility and facilitate efficient installation, particularly in prefabricated construction.
Recommendations for co-ordination of dimensions in buildings-Arrangements of building components and assemblies, Part 4: Functional group 4 services and drainage
Overview
Status
Current
Usage level
Specialized
Domain
Architectural — Planning, Housing and Pre-fabricated Construction
ISO 21723:2020ISO (International Organization for Standardization)
HighCurrent
Buildings and civil engineering works — Modular coordination — Module
Defines the basic module (100 mm), which is the foundational principle of IS 7564.
ISO 2848:1974ISO (International Organization for Standardization)
HighWithdrawn
Building construction — Modular coordination — Principles and rules
The foundational ISO standard from which the principles in IS 7564 are directly derived.
BS 6750:1986BSI (British Standards Institution), UK
HighWithdrawn
Specification for modular co-ordination in building
A comprehensive national standard applying the same ISO-derived principles of modular coordination.
ISO 6512:1982ISO (International Organization for Standardization)
MediumWithdrawn
Building construction — Modular co-ordination — Storey heights and room heights
Specifically covers vertical dimensions (storey heights), a key component of IS 7564 Part 1.
Key Differences
≠IS 7564 provides specific preferred dimensions for structural components (e.g., column sizes 300x300, 300x400 mm), whereas modern ISO standards like ISO 21723 focus on defining the principles (the module) and leave specific application dimensions to designers.
≠IS 7564 is structured as a series of parts for different 'Functional Groups' (Part 1 for Structures). The international approach has moved away from this rigid functional grouping towards more principle-based general standards.
≠The Indian standard is a 'Recommendation', and its application in practice is inconsistent. While ISO standards are also voluntary, their adoption within the European Union (as EN ISO standards) or in major international projects can lead to more consistent application.
≠The specific examples and preferred dimensions in IS 7564 are tailored to construction materials and practices common in India (e.g., reinforced concrete frames), which may differ from priorities in regions with different dominant construction systems (e.g., timber or steel framing).
Key Similarities
≈Both IS 7564 and the international standards (from ISO 2848 to ISO 21723) are fundamentally based on the same basic module 'M' of 100 mm.
≈The use of multimodules (multiples of the basic module, such as 3M, 6M, 12M, 30M) for establishing larger scale dimensions like structural grids and building layouts is a core shared principle.
≈Both systems explicitly define and differentiate between 'co-ordinating dimensions' (the ideal modular space for a component) and 'work size' or 'basic size' (the actual manufactured dimension), accounting for joints and tolerances.
≈The hierarchical approach to design is identical: establishing large-scale planning grids first, followed by vertical dimensions (storey heights), and finally the sizing of individual components, all derived from the modular system.
Parameter Comparison
Parameter
IS Value
International
Source
Basic Module (M)
100 mm
100 mm
ISO 21723:2020
Primary Multimodule for Components
3M (300 mm) is preferred for cross-sections of structural members.
3M (300 mm) is a preferred multimodule for horizontal dimensions.
ISO 1040:1983 (Withdrawn)
Preferred Storey Heights
2700, 2800, 3000, 3300, 3600 mm (all are multiples of M)
2700, 2800, 3000, 3300, 3600 mm
ISO 6512:1982 (Withdrawn)
Horizontal Grid Dimensions
Preferred multimodules are 3M, 6M, 12M, 15M, 30M, and 60M.
Preferred multimodules include 3M, 6M, 12M, 30M, and 60M.
ISO 1040:1983 (Withdrawn)
Column Cross-Sectional Dimension Principle
Co-ordinating dimensions should be multiples of M, preferably 3M. (e.g., 300, 400, 500 mm)
Co-ordinating dimensions shall be multiples of the basic module M.
ISO 2848:1974 (Withdrawn)
Floor-to-Floor Height Principle
Should be a multiple of the basic module M, preferably 3M.
Co-ordinating vertical dimensions should be multiples of the basic module M.
ISO 2848:1974 (Withdrawn)
⚠ Verify details from original standards before use
Key Values6
Quick Reference Values
Coordinating height for kitchen worktops and sinks900 mm
Coordinating depth for kitchen base units600 mm
Minimum clear space in front of WC pan750 mm
Coordinating width for a single bed900 mm
Coordinating length for a single bed1900 mm
Coordinating size for bath tub1700 mm x 750 mm
Tables & Referenced Sections
Key Tables
Table 1 - Co-ordinating Sizes for Built-in Domestic Kitchen Equipment
Key Clauses
Clause 4 - Principles for the Arrangement of Components
Clause 5 - Controlling Dimensions for Spaces
Annex A - Co-ordinating Sizes for Sanitary Appliances and Related Spaces
Annex B - Co-ordinating Sizes for Domestic Furniture and Related Spaces
What is the recommended height for a kitchen worktop?+
The coordinating height for kitchen worktops and sinks is generally 900 mm (Table 1).
What is the standard coordinating size for a single bed?+
A common coordinating size for a single bed is 900 mm x 1900 mm (Annex B).
What is the minimum clearance recommended in front of a water closet (WC)?+
A clear space of at least 750 mm should be provided in front of the WC pan (Annex A).
What is the purpose of this standard?+
To provide a rationalized and coordinated system of dimensions for furniture, fixtures, and equipment to ensure they fit within buildings designed using modular coordination principles.