Byelaws for the construction of cinema buildings

IS 4878 - Scope: Key Specifications & Tables

Scope (Clause 1):
IS 4878 covers design, construction, and safety requirements for cinema buildings, including permanent and semi-permanent structures.

Key Specifications from the Code:

• Materials & Specifications (Clause 3.7.2.5):

  • Detailed specifications with type and grade of materials must accompany the notice, signed by licensed architect/engineer (see Appendix D).

• Plans & Data Submission (Clause 13.2.2):

  • All plans/specifications for HVAC systems must be submitted to the Authority when required.

• Drawing Sheet Sizes & Colour Coding (Clause 3.7.2.1):

Summary:

• IS 4878 mandates comprehensive documentation including material specs, drawings, and HVAC details.
• Drawing sheets must conform to sizes in Table 1.
• Signed specifications ensure accountability and compliance.
• Refer to Appendix D for application forms and detailed submission requirements.

flowchart LR
    A[Start: Cinema Building Design] --> B[Prepare Plans & Specifications]
    B --> C{Include Material Specs?}
    C -->|Yes| D[Signed by Licensed Architect/Engineer]
    D --> E[Submit Notice with Docs]
    C -->|No| F[Revise Specs]
    E --> G[Submit HVAC Plans if Required]
    G --> H[Authority Review & Approval]
    H --> I[Proceed with Construction]

For detailed design and safety clauses, consult respective sections (4-16).

IS 4878: Definitions & Specifications Summary

• Clause 2.0 (Terminology): Defines key terms related to air-conditioning and heating systems for clarity and uniformity in design and construction.

• Clause 3.7.2.5 (Specifications):

  • All specifications (general & detailed) must specify type and grade of materials.
  • Specifications must be signed by a licensed architect or engineer.
  • Specifications accompany the notice as per Appendix D.

• Clause 13.2.2:

  • All plans, specifications, and data for HVAC systems must be submitted to the relevant authority when requested.

Key Points for Specifications:

Practical Tip:

Always refer to Appendix D for detailed format and content of specifications to ensure compliance.

flowchart LR
    A[Design Phase] --> B[Prepare Specifications]
    B --> C{Include Type & Grade of Materials?}
    C -- Yes --> D[Sign by Licensed Architect/Engineer]
    D --> E[Submit with Notice]
    E --> F[Authority Review]

This ensures clarity, accountability, and regulatory compliance in HVAC system design.

IS 4878 – Administrative Procedures and Permits: Key Points

1. Administration (Clause 3)

• Governed by local licensing authorities (e.g., Executive Engineer, Licensing Authority Delhi).
• Compliance with zoning regulations (Clause 2.56) is mandatory.
• Specifications of materials and design, signed by licensed architect/engineer, must accompany the construction notice (Clause 3.7.2.5).

2. Permits and Documentation (Appendices)

3. Key Specifications (Clause 3.7.2.5)

• Detailed material type and grade must be submitted.
• Signed by licensed professionals.
• Ensures safety and compliance with code.

Summary Flow of Administrative Procedure

flowchart TD
    A[Submit Notice for Construction (Appx A)] --> B[Submit Specifications (Clause 3.7.2.5)]
    B --> C[Application for Permit/License (Appx D)]
    C --> D[Grant or Refusal of Permit (Appx G)]
    D -->|If Granted| E[Start Construction (Notice of Commencement - Appx H)]
    E --> F[Supervision & Compliance (Appx E)]
    F --> G[Completion Certificate (Appx J)]
    G --> H[Occupancy Certificate (Appx K)]

Note: Always refer to the local licensing authority for specific procedural requirements and timelines.

IS 4878: Off-Street Parking Spaces (Appendix L & Clause 8.1)

Key Points:

• Off-street parking must comply with Appendix L and local Development Control Rules.
• Parking space includes the parking area + driveway for easy vehicle ingress/egress (Clause 2.42).

Typical Specifications for Parking Spaces (as per IS 4878 Appendix L):

• Driveway should allow smooth ingress/egress without reversing onto the street.
• Parking layout must ensure clear maneuvering space.

Formula for Parking Area Estimation:

[ \text{Total Parking Area} = N \times (L \times W) + \text{Driveway Area} ] Where:

• (N) = Number of vehicles
• (L, W) = Length and width of parking space

flowchart LR
    A[Entrance/Exit] --> B[Driveway (≥3m wide)]
    B --> C[Parking Bays]
    C --> D[Vehicle Parked]

Summary: Follow Appendix L dimensions, ensure driveways for easy vehicle movement, and check local Development Control Rules for compliance.

IS 4878: Height Limitations Summary

• Clause 7.2 governs height/number of storeys based on:
  • FAR (Floor Area Ratio) limits
  • Open spaces (see Clause 5)
  • Width of street fronting the plot

Key Specifications:

Important Points:

• Additions/Extensions (6.3.2): Allowed only if open space requirements (Clause 6.1) are maintained post-extension.
• Height restrictions ensure adequate light, ventilation, and safety.
• Street width controls help prevent overcrowding and fire hazards.

Formula for FAR:

[ \text{FAR} = \frac{\text{Total covered area on all floors}}{\text{Plot area}} ]

Height and storeys are limited to keep FAR within permissible limits.

flowchart TD
    A[Plot with Street Width] --> B{Street Width}
    B -->|<5 m| C[Low Height Limit]
    B -->|5 to <6.7 m| D[Medium Height Limit (up to 6.7 m)]
    B -->|≥6.7 m| E[Higher Height Limit (≥6.7 m)]
    E --> F[Check FAR & Open Spaces]
    F --> G[Approve Building Height]

In essence: Check street width → Apply height limit → Verify FAR & open space → Approve construction.

IS 4878: Building Components and Facilities - Key Specifications

Functional Requirements (Clause 13.2.2 & 13.2.3)

• All HVAC (Heating, Ventilation, and Air Conditioning) plans and specifications must be submitted for approval.
• Plans should include:
  • Building identification (name, type, location)
  • Owner details
  • Orientation (North point)
  • Room dimensions, height, and intended use
  • Construction details of walls, roofs, floors, windows, and doors (including insulation and finishes)
  • HVAC equipment layout: cooling towers, ducts, air distribution, refrigeration, heating plants
  • Details of dampers in air supply systems
  • Chimney/gas vent dimensions and height
  • Internal equipment loads (people, motors, heaters, lighting)
  • Fire separation locations and grades

Constructional Practices (Clause 12.1)

• Follow SP:7-1983 for construction safety, material handling, and demolition.

Summary Table: HVAC Plan Requirements

flowchart TD
    A[Building Info] --> B[Room Dimensions & Use]
    B --> C[Wall, Roof, Floor Details]
    C --> D[HVAC Equipment Layout]
    D --> E[Air Distribution & Dampers]
    E --> F[Internal Loads & Fire Separations]
    F --> G[Submission to Authority]

This ensures compliance with IS 4878 for building facilities and HVAC systems.

IS 4878: Means of Access and Exits - Key Points

1. Means of Access (Clause 4.1.1, Table 4)

• Minimum width of means of access depends on the length:

• Width of means of access shall not be less than internal accessways.

2. Capacity of Exits (Clause 10.3.2)

• Exit capacity must be adequate for safe evacuation.
• Capacity depends on occupant load and exit width.
• Typically, exit width is calculated based on the number of persons and a unit width per person (e.g., 0.5 m per 60 persons).

3. Arrangement of Exits (Clause 10.3.3)

• Exits should be arranged to provide safe, unobstructed egress.
• Multiple exits required for large occupant loads.
• Exits must be distributed to avoid congestion and ensure rapid evacuation.

4. Types of Exits (Clause 10.1)

• Doors, staircases, ramps, and other approved means.
• Must comply with fire safety and accessibility norms.

flowchart LR
    A[Occupant Load] --> B[Calculate Exit Width]
    B --> C{Means of Access Length}
    C -->|<=200m| D[Width = 12m]
    C -->|<=400m| E[Width = 15m]
    C -->|<=600m| F[Width = 18m]
    C -->|>600m| G[Width = 24m]
    D & E & F & G --> H[Check Internal Access Width]
    H --> I[Final Means of Access Width]

Summary:

• Use Table 4 for means of access width based on length.
• Ensure exit capacity matches occupant load with adequate width.
• Arrange multiple exits for safety and compliance.

IS 4878: Seating Requirements and Lifts

Seating Requirements (Clause 13.5)

• Seat Width:
  • Average width ≥ 50 cm
  • Minimum width ≥ 45 cm (Clause 13.5.2)
• Intervening Space (Legroom):
  • Minimum 30.5 cm between back of one seat and front of the next (measured perpendicularly) (Clause 13.5.4)

Provisions for Lifts (Clause 13.6)

• The code mandates appropriate provisions for lifts in buildings, ensuring accessibility and safety.
• While IS 4878 does not give detailed formulas, typical design considerations include:
  • Lift capacity based on occupant load.
  • Minimum car dimensions to accommodate users and wheelchairs.
  • Compliance with relevant accessibility standards (e.g., IS 14665 for lifts).

Summary Table: Seating Dimensions

flowchart TD
    A[Seating Arrangement] --> B[Seat Width ≥ 45 cm]
    A --> C[Average Seat Width ≥ 50 cm]
    A --> D[Legroom ≥ 30.5 cm]
    E[Lift Provision] --> F[Capacity based on occupant load]
    E --> G[Minimum car dimensions]
    E --> H[Accessibility compliance]

For detailed lift design, refer to IS 14665 and relevant elevator codes.

IS 4878 – Electrical Installations: Key Points

Design Considerations (Clause 14.2.1.1)

When planning electrical wiring installations, consider:

• Supply type, occupancy, load & earthing arrangement
• Atmospheric conditions: temperature, moisture, corrosive environment
• Presence of inflammable/explosive materials
• Electrical & mechanical protection level
• Continuity of service & standby supply needs
• Future modification/extension possibilities
• Operation & maintenance costs
• Cost comparison of alternative methods
• Radio/telecommunication interference suppression
• Ease of maintenance
• Safety aspects
• Energy conservation

Reference Standards

• For detailed layout & equipment location (sub-stations, switchboards, etc.), refer to SP:7-1983, Part VIII, Section 2.
• For lift electrical planning, refer to SP:7-1983, Part VIII, Section 5.

Summary Table of Planning Factors

For detailed electrical design formulas (like load calculations, cable sizing), consult SP:7-1983 and relevant IS codes such as IS 732 (Wiring), IS 3043 (Earthing).

flowchart LR
    A[Start: Electrical Installation Design]
    A --> B[Assess Supply & Load]
    B --> C[Check Environmental Conditions]
    C --> D[Determine Protection Level]
    D --> E[Plan for Continuity & Standby]
    E --> F[Consider Future Extensions]
    F --> G[Evaluate Costs & Interference]
    G --> H[Ensure Safety & Energy Conservation]
    H --> I[Refer SP:7-1983 for Details]
    I --> J[Finalize Design]

IS 4878: Fire Protection Key Points

1. Fire Resistance Ratings (Clause 15.1.2)

• Refer to Table 3 for fire resistance ratings of structural and non-structural members.
• Ratings depend on material type and construction method.
• Typical ratings range from 1 hour to 4 hours for load-bearing elements.

2. Fixed Fire Fighting Installations (Clause 15.10)

• Installations must comply with relevant national standards (e.g., IS 3844, IS 15105).
• Includes sprinkler systems, hydrants, and fire extinguishers.
• Ensure adequate water supply, pressure, and coverage per building size.

3. Audio-Visual Fire Alarm Systems (Clause 14.6)

• Amplifying and sound distribution systems must follow SP:30-1984 guidelines.
• Ensure clear, audible alarms for evacuation.

Typical Fire Resistance Table (Excerpt from IS 4878 Table 3):

flowchart LR
    A[Fire Protection] --> B[Fire Resistance Ratings]
    A --> C[Fixed Fire Fighting Installations]
    A --> D[Audio-Visual Alarm Systems]
    B --> E[Structural Members]
    B --> F[Non-structural Members]
    C --> G[Sprinklers]
    C --> H[Hydrants]
    C --> I[Extinguishers]
    D --> J[Sound Systems per SP:30-1984]

For detailed design, refer to IS 4878 Table 3 and relevant fire safety codes like IS 3844.

IS 4878: Water Supply & Drainage - Key References

• Clause 16.3 mandates design & maintenance per SP:7-1983, Part IX Plumbing Services:
  • Section 1: Water Supply
  • Section 2: Drainage & Sanitation

Key Aspects from SP:7-1983 (Plumbing Services)

Basic Formulas

• Water Demand (Q): [ Q = \text{Population} \times \text{Demand per capita} ]

• Flow Velocity in Drain Pipes: [ V = \frac{4Q}{\pi d^2} ] where (d) = pipe diameter, (Q) = flow rate

• Slope (S) for self-cleansing velocity: [ S = \frac{V^2}{2gR} ] where (R) = hydraulic radius, (g) = acceleration due to gravity

Summary Diagram

flowchart TD
    A[Water Supply] --> B[Demand Calculation]
    B --> C[Pipe Sizing]
    C --> D[Distribution Network]
    A --> E[Storage]
    F[Drainage & Sanitation] --> G[Trap & Vent Design]
    G --> H[Pipe Slope & Diameter]
    H --> I[Disposal System]

For detailed design, always refer to SP:7-1983, Part IX sections 1 & 2 as per IS 4878 Clause 16.3.

IS 4878 - Maintenance and Cleanliness (Clause 17.5)

Key specifications for maintenance and cleanliness of cinema buildings:

• Ventilation: All windows and ventilation means must be kept in good order.
• Sanitation: Entire building to be maintained in proper sanitary conditions.
• Walls: Hot lime washing at least once every 2 years or as directed.
• Cleaning Frequency: Premises and refuse removal at least every 24 hours or more frequently if required.
• Electrical Equipment: Fans, glass, shades to be cleaned periodically and kept presentable.
• Mechanical Equipment: Exhaust fans, AC plants, lifts to be cleaned and inspected regularly.
• Fire Fighting Installations: Periodic inspection to ensure operability.
• Storage Tanks: Regular inspection and periodic cleaning.

Air Conditioning Fresh Air Requirements (Clause 13.2.6)

• Minimum outside fresh air must be related to occupant number and enclosure volume.

flowchart TD
    A[Maintenance] --> B[Ventilation: Windows & Vents]
    A --> C[Sanitation: Cleanliness & Refuse Removal]
    A --> D[Wall Treatment: Hot Lime Washing]
    A --> E[Electrical Equipment Cleaning]
    A --> F[Mechanical Equipment Inspection]
    A --> G[Fire Fighting Installations Inspection]
    A --> H[Storage Tank Cleaning]

Summary: Maintain cleanliness by scheduled cleaning, inspections, and sanitation; ensure adequate ventilation and fresh air per occupant as per IS 4878.

IS 4878: Semi-Permanent Cinema Buildings – Key Points

Definition (Clause 2.48)

• Constructed with non-inflammable materials.
• Side walls: 1.0 m high plastered walls.
• Above walls: covered with durable black canvas, tarpaulin curtains, or similar to block light and rain.

Planning Requirements (Clause 19.1)

• Must address:
  • Traffic load and parking spaces.
  • Fire fighting provisions.
  • Building service installations (electrical, ventilation).
  • Water supply and drainage.
  • Safety requirements equivalent to permanent cinema buildings.

Specifications Summary:

Important Notes:

• No explicit load formulas are given in IS 4878 for semi-permanent structures.
• Use load calculations and fire safety norms from permanent cinema building clauses or relevant IS codes (e.g., IS 875 for loads, IS 1641 for fire safety).
• Ensure adequate drainage and ventilation to prevent moisture and heat buildup.

flowchart TD
    A[Semi-Permanent Cinema Building] --> B[1.0 m Plastered Walls]
    A --> C[Black Canvas/Tarpaulin Curtain]
    A --> D[Non-Inflammable Materials]
    A --> E[Safety & Services as Permanent]
    E --> F[Traffic Load & Parking]
    E --> G[Fire Fighting]
    E --> H[Water Supply & Drainage]

For detailed structural design, refer to IS 875 for loadings and IS 1641 for fire safety standards.

IS 4878: Form for Occupancy Certificate (Appendix K)

The Occupancy Certificate certifies that the cinema building is fit for occupation, meeting all safety and byelaw requirements.

Key Specifications from Appendix K:

• Building Details: Plot no., location (street/road, colony/bazar).
• Supervision: Completed under licensed architect/engineer supervision (include license no.).
• Inspection: Authority inspects and certifies conformity to:
  • Structural safety
  • Fire safety
  • Hygienic and sanitary conditions (inside & surroundings)
• Declaration: Building is fit for occupation as per byelaws.

Format Summary:

I hereby certify that the erection/material alteration in/of cinema building situated on/in plot No. ___, street/road ___, colony/bazar ___, completed under supervision of licensed architect/engineer License No. ___, has been inspected by me and conforms to all byelaws regarding structural safety, fire safety, hygiene, and sanitation, and is fit for occupation.

Signature of Authority

Related Forms:

• Appendix J: Completion Certificate (confirms construction per sanctioned plans).
• Appendix F: Qualifications of licensed architects/engineers.

This certificate is issued by the Licensing/Local Authority after satisfactory inspection.

flowchart TD
    A[Construction Completed] --> B[Supervision by Licensed Architect/Engineer]
    B --> C[Completion Certificate (Appendix J)]
    C --> D[Inspection by Licensing Authority]
    D --> E[Occupancy Certificate Issued (Appendix K)]
    E --> F[Building Fit for Occupation]