Recommendations for modular co-ordination: basic module and submodular increments (Equivalent to ISO 1006 and ISO 651: 1982)

IS 10316: Scope & Key Specifications

Scope (Clause 1.1)

• Defines basic module (M) and sub-modular increments for modular coordination in building design.
• Applies to building parts, components, and their construction.
• Recommends preferred values for modular increments to standardize dimensions.

Basic Module & Sub-Modular Increments (Clause 4.2.6 & Table 1)

• Only one sub-modular increment should be used per project (Clause 4.2.5).
• L indicates limit values.

SI Units & Definitions (for clarity)

• Length: metre (m)
• Force: newton (N) = 1 kg·m/s²
• Pressure: pas

IS 10316: Definitions and Symbols – Key Points

1. Basic Module (M):

• Fundamental unit for modular coordination in building construction.
• Preferred values of M are given in Table 1 (mm):
  20, 25, 40, 50, 60, 75, 80, 100, 120, 125, 140, 150, 160, 175, 180, 200, 220, 225, 240, 250, 260, 275, 280, 300.

2. Sub-Modular Increments:

• Used to subdivide the basic module for finer dimensions.
• Three preferences:
  • 1st Preference: M/2
  • 2nd Preference: M/4
  • 3rd Preference: M/8 (or M/S as per Table 1)

3. SI Units and Symbols:

• Length (m), Mass (kg), Time (s), Electric current (A), Temperature (K), Luminous intensity (cd), Amount of substance (mol).
• Supplementary units: Plane angle (rad), Solid angle (sr).

4. Derived Units:

Summary Diagram: Modular Coordination

graph LR
    A[Basic Module (M)] --> B[1st Preference: M/2]
    A --> C[2nd Preference: M/4]
    A --> D[3rd Preference: M/8 (M/S)]
    B --> E[Preferred Values:

IS 10316: Recommended Values for Modular Coordination

1. Basic Module (M) and Sub-Modular Increments (Clause 4.2.6)

• Basic Module (M): Fundamental unit of length.
• Sub-Modular Increments: Fractions of M used for preferred dimensions.

2. Preferred Values (Table 1)

IS 10316: Basic Module (M) - Key Points

1. Definition (Clause 3.1 & 4.1)

• Basic Module (M) is a fundamental unit of measurement in modular coordination, defining the size of building components.
• It serves as a reference dimension for design and construction.

2. Basic Module Values & Sub-Modular Increments (Clause 4.2.6 & Table 1)

• Sub-Modular Increments are fractions of M:
  • 1st Preference = M/2
  • 2nd Preference = M/4
  • 3rd Preference = M/S (S = selected divisor)

3. Notes

• "L" indicates limit values.
• Units follow

IS 10316: Sub-Modular Increments Summary

• Basic Module (m): The fundamental unit dimension in the modular system.
• Sub-Modular Increment: A fraction of the basic module used for finer dimensional control.

Definition (Clause 2.2)

Sub-modular increment = fraction × basic module (m)

Key Points (Clauses 3.2 & 4.2.1)

• Sub-modular increments allow dimensions smaller than the basic module.
• These increments follow international standardized values.
• Used when precise sizing is required beyond the basic module.

Typical Sub-Modular Fractions (from Fig. 1 and standard practice):

Formula:

[ \text{Sub-Modular Increment} = \frac{m}{n} \quad \text{where } n = 2, 3, 4, 5, \ldots ]

Visualization

flowchart LR
    A[Basic Module (m)] --> B[Sub-Modules]
    B --> C[1/2 m]
    B --> D[1/3 m]
    B --> E[1/4 m]
    B --> F[1/5 m]

Use sub-modular increments to achieve finer dimensional control in design, ensuring compatibility with modular construction principles per IS 10316.

IS 10316: Application Guidelines for Modular Coordination

Key Concepts:

• Basic Module (M): Fundamental unit dimension.
• Sub-Modular Increments: Fractions of M used for finer dimensioning.

Clause 4.2.6 - Preferred Sub-Modular Increments (Table 1)

• L indicates a limit value.
• The first preference is usually M/2, followed by M/4, then M/S (S = specific divisor).

SI Units & Definitions:

• Length (m), Mass (kg), Time (s), Force (N = kg·m/s²), Pressure (Pa = N/m²), etc.
• Use SI units consistently for modular coordination.

Summary:

• Use **basic module (

IS 10316: Dimensional Coordination Principles (Modular Coordination)

Key Concepts:

• Basic Module (M): The fundamental length unit for dimensional coordination, ensuring compatibility among building components.
• Work Size vs Coordinating Size:
  Work sizes differ from coordinating sizes to accommodate joints and tolerances (Clause 3.3).

Modular Coordination Principles:

• Modular coordination simplifies building design by using multiples of a basic module (M).
• Components and building elements are dimensioned as integral multiples or sub-multiples of M.
• This allows prefabrication, cost reduction, and interchangeability.

Basic Module and Sub-Modules:

Dimensional Relation:

• Coordinating Size = n × M (where n = integer)
• Work Size = Coordinating Size − (joint + tolerance allowances)

Practical Use:

• Design all components (doors, windows, panels) in multiples of M.
• Use sub-modular increments for precision fitting.

flowchart LR
    A[Basic Module (M)] --> B[Coordinating Size = n × M]
    B --> C[Work Size = Coordinating Size - Joint & Tolerance]
    C --> D[Building Components Dimensioned]
    D --> E[Prefabrication & Cost Efficiency]

References:

• ISO 1005-1973 (Basic Module)
• ISO 6514-1982 (Sub-Modular Increments)

This modular system ensures dimensional harmony and rationalization in building construction.

IS 10316: Use in Planning and Design – Key Points

1. Basic Module & Sub-Modular Increments (Clause 4.2.6 & Table 1)

• Basic Module (M): Fundamental unit for modular coordination in building design.
• Sub-Modular Increments: Divisions of M used for finer planning.

• Note: Only one sub-modular increment should be used consistently per project (Clause 4.2.5).

2. SI Units & Definitions (For consistency)

• Length: metre (m)
• Force: newton (N) = 1 kg·m/s²
• Pressure/Stress: pascal (Pa) = 1 N/m²
• Energy: joule (J) = 1 N·m
• Power: watt (W) = 1 J/s

Summary for Design:

• Select one preferred sub-modular increment (preferably M/2).
• Use increments from Table 1 for dimensioning components.
• Maintain modular coordination to simplify construction and reduce errors.

flowchart LR
    A[Basic Module (M)] --> B[Sub-Modular Increments]
    B --> C1[1st Preference: M/2]
    B --> C2[2nd Preference: M/4]
    B --> C3[3rd Preference: M/S]
    C1 --> D1[50, 100, 150, 200, 250, 300 mm]
    C2 --> D2[25, 75, 125, 175, 225, 275 mm]
    C3 --> D3[20, 

IS 10316: Compatibility with Prefabricated Components

This standard emphasizes modular coordination for prefabricated building components using a basic module (M) and sub-modular increments to ensure dimensional compatibility.

Key Points:

• Basic Module (M): Governs dimensions of building parts and components.
• Sub-Modular Increments: Allow finer dimensional adjustments, improving fit and assembly.

Table 1: Preferred Sub-Modular Increments (Clause 4.2.6)

• Note: "L" denotes limit values.
• Work sizes differ from coordinating sizes to allow joints and tolerances (Clause 3.3).

Specifications:

• Use M/2 as the first preference for increments.
• Use M/4 or M/8 if finer adjustments are needed.
• Dimensions must follow SI units (meter, millimeter, etc.).
• Modular coordination reduces construction cost and enhances prefabrication efficiency.

Summary Diagram: Modular Coordination Concept

graph LR
A[Basic Module (M)] --> B[Sub-Module M/2]
A --> C[Sub-Module M/4]
A --> D[Sub-Module M/8]
B --> E[Prefabricated Components]
C --> E
D --> E
E --> F[Assembly with Tolerances]

Use IS 10316 Table 1 for selecting modular increments to ensure compatibility and ease of assembly in prefabricated construction.

IS 10316: International Coordination in Modular Coordination

Key Concepts:

• Modular coordination standardizes building dimensions using a basic unit (module) to rationalize building components and reduce costs.
• The standard aligns with ISO 1005-1973 (Basic module) and ISO 6514-1982 (Sub-modular increments).

Basic Module (M) and Sub-Modular Increments

• L indicates limit values.
• Use M/2, M/4, or M/S increments for finer dimensional control.

SI Units for Coordination

Summary

• Modular coordination simplifies design by using multiples/submultiples of a basic module (M).
• Sub-modular increments (M/2, M/4, M/S) allow flexibility.
• Aligns Indian practices with international ISO standards for global compatibility.

flowchart LR
    A[Basic Module (M)] --> B[1st Preference: M/2]
    A --> C[2nd Preference: M/4]
    A

IS 10316: Limitations and Restrictions on Sub-Modular Increments

Key Points:

• Basic Module (M): Fundamental dimension unit.
• Sub-Modular Increment: Fractional increments of M used for detailing (Clause 2.2).

Restrictions:

• Only one type of sub-modular increment (M/2, M/4, or M/8) shall be used consistently throughout a project (Clause 4.2.5).
• Sub-modular increments shall NOT be used to determine distances between modular reference planes (Clause 4.2.2).

Preferred Values (Table 1):

• L indicates limit values.

SI Units & Definitions:

• Length (m), Force (N = kg·m/s²), Pressure (Pa = N/m²), etc. (Refer Clause on SI units).

flowchart LR
    A[Basic Module (M)] --> B[Sub-Modular Increment]
    B --> C{Select one increment}
    C --> D[M/2 (1st Preference)]
    C --> E[M/4 (2nd Preference)]
    C --> F[M/8 (3rd Preference)]
    A --> G[Modular Reference Planes]
    G -.->|No sub-modular increments| B

Summary: Use only one sub-modular increment type for design; avoid sub-modular increments for grid spacing; follow preferred values from Table 1 for standardization.

IS 10316: Symbols and Notations for Modular Coordination

Key Definitions:

• Basic Module (M): Fundamental unit of measurement for modular coordination.
• Sub-Modular Increment: A fraction of the basic module used for finer increments in dimensions.

Sub-Modular Increments (Clause 4.2.6 & Table 1):

Note: "L" denotes limit values in the table.

SI Units & Symbols (Selected):

Summary:

• Use Basic Module (M) as primary dimension.
• Apply sub-modular increments (M/2, M/4, M/8) for finer detailing.
• Follow SI units and symbols for consistency.

flowchart LR
    A[Basic Module (M)] --> B[1st Preference (M/2)]
    A --> C[2nd Preference (M/4)]
    A --> D[3rd Preference (M/8)]
    B --> E[Preferred Values: 50, 100, 150...]
    C --> F[Preferred Values: