Guide for requirements of cluster planning for housing

IS 13727: Scope Summary

• Purpose: This standard provides guidelines for low-income housing design and construction.
• Applicability: Urban area housing projects.
• Related Standards:
  • SP 7: 1983 (National Building Code of India - Fire safety, structural design, plumbing)
  • IS 8888 (Guide for low-income housing requirements)
• Design Requirements: Fire safety, structural integrity, building services, plumbing as per SP 7:1983.
• Quality Assurance: Products and materials should comply with BIS certification and quality control systems.

Key References in Scope:

Notes:

• The standard ensures housing is safe, durable, and affordable.
• Emphasizes compliance with BIS quality marks and inspection regimes.

flowchart LR
    A[IS 13727 Scope] --> B[Low Income Housing Design]
    B --> C[Urban Area Focus]
    B --> D[Compliance with SP 7:1983]
    D --> E[Fire Safety]
    D --> F[Structural Design]
    D --> G[Plumbing Services]
    A --> H[BIS Quality Control]

For detailed design formulas and tables, refer to SP 7 and IS 8888 as per Clause 2.1.

IS 13727: Referenced Standards & Specifications Summary

• Primary Adjunct Standards:

  • SP 7 : 1983 — National Building Code of India (First Revision)
  • IS 8888 (Part 1): 1993 — Guide for Low Income Housing (Urban Areas)

• Key Clauses:

  • Clause 2.1: Mandates use of above standards alongside IS 13727.
  • Clause 5.2 & Table 5.1: Fire safety, structural design, building services, and plumbing must comply with SP 7 : 1983.

• BIS Licensing & Quality Control:

  • Products conforming to IS standards carry BIS certification.
  • BIS ensures continuous inspection and testing for compliance.

Summary Table of Referenced Standards

Notes:

• IS 13727 relies heavily on SP 7 for design safety and services.
• Refer to SP 7 for detailed fire safety and plumbing design formulas and tables.
• BIS ensures conformity through licensing and quality control.

flowchart LR
    IS13727 --> SP7["SP 7 : 1983\n(NBC India)"]
    IS13727 --> IS8888["IS 8888 (Part 1): 1993\n(Low Income Housing)"]
    SP7 --> FireSafety
    SP7 --> StructuralDesign
    SP7 --> PlumbingServices

For detailed formulas and design tables, consult SP 7 : 1983 as IS 13727 defers to it for technical specifics.

IS 13727: Definitions and Terminology (Clause 3.0) - Key Points

• Purpose: Clause 3.0 defines terms specifically for this standard to ensure uniform understanding.
• Reference Standards:
  • SP 7:1983 (National Building Code of India - Fire safety, structural design, plumbing)
  • IS 8888 (Guide for low-income housing design)
• Scope: Covers definitions related to housing design, fire safety, structural elements, and services.
• Key Terms: Typical terms defined include:
  • Building Design Requirements
  • Fire Safety Measures
  • Structural Design Parameters
  • Building Services and Plumbing

Additional Notes:

• The standard refers to SP 7:1983 for detailed fire safety and structural design requirements.
• Terminology aligns with Indian Standards for housing and urban development.
• The standard emphasizes compliance with BIS quality control and licensing for products.

Summary Table: Reference Standards for Terminology

If you need definitions of specific terms or formulas related to structural design or fire safety, please specify!

IS 13727: Guide for Requirements of Cluster Planning for Housing
Key Planning Requirements & Specifications

1. Plot/Plinth Area for Slum Resettlement (Clause 4.2)

• Minimum plot area should accommodate adequate living space, amenities, and circulation.
• Plinth area per dwelling unit must ensure minimum habitability and ventilation.

General Planning Guidelines (from IS 13727 & best practices)

• Cluster size: Typically ranges from 20 to 100 dwelling units for effective community interaction.
• Open spaces: Minimum 30% of total cluster area for ventilation, light, and recreation.
• Road width: Minimum 3.5 m for internal roads to allow emergency and service vehicles.
• Setbacks: Minimum 1.5 m from plot boundary for fire safety and privacy.
• Density: Should balance between 150-250 persons per hectare depending on urban context.

Typical Formula for Plot Coverage:

[ \text{Plot Coverage} = \frac{\text{Built-up Area}}{\text{Total Plot Area}} \times 100% ]

Recommended plot coverage: 40-50% for cluster housing to allow open spaces.

Summary Table: Typical Cluster Planning Parameters

flowchart TD
    A[Cluster Planning] --> B[Plot/Plinth Area]
    A --> C[Open Spaces]
    A --> D[Roads & Circulation]
    A --> E[Setbacks & Safety]
    B --> F[Minimum Habitable Area]
    C --> G[Ventilation & Recreation]
    D --> H[Emergency Access]
    E --> I[Fire Safety & Privacy]

For detailed design, always refer to IS 13727 (1993) full text and local municipal regulations.

IS 13727: Building Design Requirements - Key Points

• Governing Codes:

  • National Building Code (NBC) 1980 (SP 7:1983)
  • IS 8888 (Part 1): 1993 for low-income housing urban areas

• Design Requirements Include:

  • Fire safety
  • Structural design
  • Building services
  • Plumbing services

• Reference Table 5.1 (Clause 5.2): Specifies detailed building design requirements as per SP 7:1983.

Summary Table: Building Design Requirements (from SP 7:1983)

Additional Notes:

• IS 13727 defers detailed design specs to NBC and IS 8888.
• For structural calculations, refer to relevant IS codes (e.g., IS 456 for concrete, IS 800 for steel).
• Fire safety design includes means of escape, fire resistance ratings, and fire-fighting provisions per NBC.

flowchart LR
    A[IS 13727] --> B[NBC 1980 (SP 7:1983)]
    A --> C[IS 8888 (Part 1): 1993]
    B --> D[Fire Safety]
    B --> E[Structural Design]
    B --> F[Building Services]
    B --> G[Plumbing Services]

For detailed formulas and design tables, consult NBC 1980 and IS 8888 directly.

IS 13727: Key Specifications for Open Space and Access

1. Group Open Space (Clause 3.4)

• Definition: Shared open space within a cluster, neither public nor private.
• Use & Maintenance: Shared right of use and collective maintenance by all dwelling units around it.

2. Size of Cluster Open Space (Clause 4.4)

• Minimum Width:
  [ \text{Width} \geq \max \left(6,m, \frac{3}{4} \times \text{Building Height}\right) ]
• Minimum Area:
  [ \text{Area} \geq 36,m^2 ]
• Building Height: Normally ≤ 15 m around cluster open space.
• Maximum Cluster Width & Breadth: 13 m

3. Width of Access Between Clusters (Clause 4.9)

• Setbacks: No setbacks from paths or roads within cluster.
• Height of Buildings Along Access:
  [ \text{Height}_{\text{along path}} \geq 0.6 \times \text{Height of adjacent building} ]
• Minimum Widths:
  • Pathway: ≥ 3 m
  • Vehicular access: ≥ 6 m

4. Net Density (Clause 3.7)

• Net Density: Excludes community facilities, open spaces, and major roads.
• Gross Density: Includes open spaces, community facilities, and major roads.

Summary Table

flowchart LR
    A[Cluster Open Space] --> B{Dimensions}
    B --> C[Width ≥ 6m or ¾ height]
    B --> D[Area ≥

IS 13727 Key Points on Density and Plot Size

1. Plot Size & Coverage (Clause 4.1)

• Minimum plot size: 15 m²
• Ground coverage: 100% (up to 25 m² plot size)
• FSI (Floor Space Index): 2 (up to 25 m² plot size)
• For plots > 25 m², follow IS 8888 (Part 1):1993 provisions.

2. Density Definitions (Clause 3.7)

• Net Density: Excludes community facilities, open spaces, and major roads.
• Gross Density: Includes open spaces, community facilities, and major roads.
• Incidental Open Spaces: Spaces between buildings for light and ventilation.

3. Density Limits (Clause 4.10)

• Cluster planning: Allows higher net densities.
• Maximum net density: 500 dwelling units/hectare (with 15 m² covered area per dwelling).
• Densities above 500 units/ha are not permitted.

Summary Table

flowchart TD
    A[Plot Size] -->|≤ 25 m²| B[100% Ground Coverage + FSI 2]
    A -->|> 25 m²| C[Follow IS 8888 (Part 1):1993]
    D[Density] --> E[Net Density (Excl. Open Spaces)]
    D --> F[Gross Density (Incl. Open Spaces)]
    G[Max Density] --> H[500 dwelling units/ha]

This ensures adequate living space, ventilation, and community amenities per IS 13727.

IS 13727: Cluster Types and Configurations

Key Definitions & Types (Clauses 3.3, 3.9, 3.10, 3.12)

Important Specifications:

• Back to Back Clusters minimize land use but require careful ventilation and light provisions.
• Interlocking Clusters enhance ventilation and light by ensuring at least two sides of dwelling units open to external or adjacent cluster spaces.
• Closed Clusters restrict entry points, impacting emergency access and ventilation.

Conceptual Diagram (Mermaid.js)

graph LR
    A[Back to Back Cluster]
    B[Interlocking Cluster]
    C[Closed Cluster]

    A -->|Shared back/sides| SharedWalls
    B -->|Access & ventilation from adjacent clusters| MultipleOpenings
    C -->|One common entry| SingleEntry

For detailed dimensional tables and ventilation norms, refer to IS 13727 clauses on cluster spacing and open space requirements.

IS 13727: Special Provisions for Slum Resettlement

Key Specifications (Clause 4.2 & 12.5)

• Minimum Plot/Plinth Area on Same Site:
  • 12.5 m² (ground floor)
  • Additional 12.5 m² on the first floor with an internal staircase
• This allows a total of 25 m² usable area per dwelling unit by vertical expansion.

Relevant Standards for Reference (Clause 2.1)

• SP 7:1983 - National Building Code of India (First Revision)
• IS 8888 Part 1:1993 - Guide for Low-Income Housing in Urban Areas

Practical Notes

• Cluster planning should optimize space while ensuring minimum living standards.
• Internal staircases must be compact yet safe, adhering to NBC guidelines.
• Vertical expansion helps mitigate land scarcity in slum resettlement projects.

Summary Table

flowchart TD
    A[Slum Resettlement Plot] --> B[Ground Floor: 12.5 m²]
    B --> C[Internal Staircase]
    C --> D[First Floor: 12.5 m²]
    D --> E[Total Usable Area: 25 m²]

This approach balances space constraints with habitability in slum redevelopment.

IS 13727: Group Housing within Clusters - Key Points

1. Group Housing Specifications (Clause 4.3)

• Plinth area: Dwelling units up to 20 m² should allow adding a habitable room.
• Height limit: Group housing in a cluster must not exceed 15 m in height.

2. Cluster Planning Guidelines (Clauses 3.10 & 1.1)

• Interlocking Clusters: Clusters joined at sides/back with common boundaries.
• Dwelling units: Must have at least two sides open to external open space for ventilation and light.
• Access and ventilation can be shared between adjacent clusters.
• Planning should accommodate future growth.

3. Conceptual Diagram: Interlocking Cluster

graph LR
  A[Cluster 1] -- Common Side --> B[Cluster 2]
  B -- Access/Ventilation --> A
  A & B --> External Open Space

Summary Table

This ensures adequate light, ventilation, and future expansion in cluster group housing.

IS 13727 on Fire Safety & Structural Design: Key Points

• Reference Standard: Clause 5.2 mandates compliance with SP 7:1983 (National Building Code of India - NBC) for fire safety, structural design, building services, and plumbing.

• Fire Safety (from NBC SP 7:1983):

  • Fire resistance ratings for structural elements (e.g., columns, beams) are specified based on building occupancy and height.
  • Minimum fire separation distances and compartmentation to prevent fire spread.
  • Requirements for fire detection, alarm, and suppression systems.

• Structural Design:

  • Design loads include dead, live, wind, seismic (as per IS 1893), and fire loads.
  • Structural elements must maintain stability and load-bearing capacity during fire exposure.
  • Use of fire-resistant materials and protective coatings.

• Typical Fire Resistance Ratings (hours):

• Design Approach:
  • Follow NBC guidelines for fire load calculations and structural fire protection.
  • Structural design must ensure minimum fire resistance period as per building use and height.

For detailed formulas, tables, and specifications, refer directly to SP 7:1983 (NBC), which is the authoritative document for fire safety and structural design requirements referenced by IS 13727.

flowchart TD
    A[IS 13727 Clause 5.2] --> B[Refer SP 7:1983 (NBC)]
    B --> C[Fire Safety Requirements]
    B --> D[Structural Design Requirements]
    C --> E[Fire Resistance Ratings]
    D --> F[Load Considerations]
    F --> G[Fire Load, Dead, Live, Wind, Seismic]
    E --> H[Compartmentation & Protection]

Summary: IS 13727 defers to NBC SP 7:1983 for comprehensive fire safety and structural design rules. Ensure compliance with NBC’s fire resistance ratings, load considerations, and fire protection methods for safe housing design.

IS 13727 references maintenance and management primarily through SP 7:1983 (National Building Code of India), which covers fire safety, structural design, and building services.

Key Points on Maintenance and Management (from IS 13727 context and SP 7:1983):

• Maintenance Objectives:

  • Ensure safety, durability, and functionality.
  • Prevent deterioration through periodic inspection and repairs.
  • Maintain fire safety and plumbing services as per standards.

• Structural Maintenance:

  • Regular inspection for cracks, corrosion, deflections.
  • Immediate repair of damaged elements.
  • Use of protective coatings and corrosion inhibitors.

• Fire Safety:

  • Maintain fire detection and suppression systems.
  • Keep fire exits and access routes clear.
  • Regular drills and system testing.

• Building Services:

  • Plumbing and electrical systems should be routinely checked.
  • Prevent water leakage and electrical faults.

Recommended Maintenance Management Steps:

Useful Formula (for structural maintenance assessment):

Allowable Crack Width (w):

[ w \leq 0.3 \text{ mm (for reinforced concrete structures as per IS 456)} ]

Summary Diagram: Maintenance Cycle

graph TD
    A[Inspection] --> B[Documentation]
    B --> C[Preventive Maintenance]
    C --> D[Corrective Actions]
    D --> E[Safety Compliance]
    E --> A

Note: For detailed procedures, refer to SP 7:1983 and IS 456 for structural design and maintenance guidelines. IS 13727 defers detailed maintenance specs to these standards.

IS 13727: Future Growth and Expansion - Key Points

IS 13727 does not explicitly provide formulas or tables specifically titled "Future Growth and Expansion." However, related guidance can be inferred from cluster planning and density clauses:

1. Net and Gross Residential Density (Clause 3.7)

• Net Density excludes:
  • Community facilities
  • Open spaces
  • Major roads (including incidental open spaces)
• Gross Density includes the above provisions at neighborhood, sector, or town level.

Formula:

[ \text{Net Density} = \frac{\text{Number of Dwelling Units}}{\text{Residential Plot Area (excluding community facilities/open spaces)}} ]

[ \text{Gross Density} = \frac{\text{Number of Dwelling Units}}{\text{Total Area (including open spaces, roads, community facilities)}} ]

2. Open Space and Community Facilities

• Open spaces and community facilities must be planned based on community size.
• Incidental open spaces ensure light and ventilation between buildings.

3. Plot/Plinth Area for Slum Resettlement (Clause 4.2)

• Specific provisions for slum resettlement plots to accommodate future growth on the same site.

4. Related Standards

• SP 7: 1983 (NBC) and IS 8888 (Part 1): 1993 provide further guidance on low-income housing and urban planning for expansion.

Summary Table for Density Types

flowchart LR
    A[Total Area] --> B[Community Facilities & Open Spaces & Roads]
    A --> C[Residential Plot Area]
    C --> D[Number of Dwelling Units]
    D --> E[Net Density Calculation]
    A --> F[Gross Density Calculation]

Use these concepts to plan for future growth by balancing density with adequate open spaces and infrastructure.

IS 13727: Annexures and Figures - Key Highlights

1. Annex A - Committee Composition:
   Lists experts from various government bodies, research institutes, and housing authorities responsible for the standard's preparation. This ensures multidisciplinary inputs for housing cluster planning.

2. Clause 5.2 Reference:
   Fire safety, structural design, building services, and plumbing must comply with SP 7:1983 (National Building Code of India).

3. Cluster Planning Concept:

   • Encourages low-rise, high-density housing for affordability and social benefits.
   • Recognizes traditional Indian lifestyles and modern urban needs.
   • Calls for relaxation in conventional byelaws (setbacks, coverage) to promote cluster planning.

4. Key Specification:

   • Minimum clearance while bridging pedestrian pathways: At least one storey height (Clause 4.6).

Useful Reference Table (Example from SP 7:1983 for Structural Design)

Summary Diagram of Cluster Planning Concept

graph LR
A[Traditional Indian Housing] --> B[Cluster Planning]
B --> C[Low-rise High-density]
B --> D[Relaxed Setbacks & Coverage]
B --> E[Social & Economic Benefits]
E --> F[Affordable Housing]
E --> G[Community Lifestyle]

For detailed formulas and tables on structural design, fire safety, and plumbing, refer to SP 7:1983 and related IS codes (e.g., IS 875 for loads).

IS 13727 - Committee and Acknowledgements Summary

• Committee Composition: The Housing Sectional Committee (CED 51) includes experts from Ministry of Urban Development, CPWD, MHADA, DDA, CBRI, NHB, NBMC, BMTPC, PWD Rajasthan, CIDCO, HUDCO, Tamil Nadu Slum Clearance Board, DST, SERC, Indian Railways, and BIS among others.

• Key Roles:

  • Chairman: Dr. P. S. A. Sundaram (Ministry of Urban Development)
  • Convener (Low Income Housing Panel): Shri M. N. Joglekar (HUDCO)
  • Secretary: Suni J. K. Prasad (BIS)

• Acknowledgements:

  • BIS holds copyright and regulates the use of the Standard Mark.
  • The standard is developed under the Bureau of Indian Standards Act, 1986.
  • The document references SP 7:1983 (National Building Code) for fire safety, structural and services design.

• Important Notes:

  • The committee's multidisciplinary composition ensures comprehensive coverage of housing and cluster planning.
  • The standard encourages cluster planning for low-income housing, emphasizing affordability and social benefits.

Reference Table: Key Committees

This section does not contain design formulas or technical tables but provides essential governance and development context for IS 13727. For technical design, refer to SP 7:1983 as cited.