Fire Safety of Museums - Code of Practice

IS 14850: Scope Overview

IS 14850 covers planning, design, and construction of foundations for transmission line towers.

Key Points on Scope:

• Applies to foundation design of transmission line towers on various soil types.
• References other Indian Standards (Annex A) for related provisions, e.g., soil investigation, concrete, and steel standards.
• Encourages use of the latest editions of referenced standards.
• Includes site planning (Clause 3), covering soil investigation, selection of foundation type, and load considerations.

Typical Foundation Design Parameters:

Basic Formula for Foundation Area:

[ A = \frac{P}{q_a / FS} ]

Where:

• ( A ) = Area of foundation (m²)
• ( P ) = Total load (kN)
• ( q_a ) = Allowable bearing capacity (kN/m²)
• ( FS ) = Factor of safety

Related IS Codes (Annex A):

• IS 6403: Code of practice for determination of bearing capacity
• IS 456: Plain and reinforced concrete
• IS 2911: Pile foundations

flowchart TD
    A[Site Investigation] --> B[Soil Bearing Capacity]
    B --> C[Load Calculation]
    C --> D[Foundation Type Selection]
    D --> E[Foundation Design]
    E --> F[Construction]

For detailed formulas and tables, refer to the specific clauses in IS 14850 and the referenced IS codes.

IS 14850: Planning of Site - Key Specifications & Guidelines

• Site Selection: Must have reliable water supply for firefighting and be accessible to fire stations. Consult local fire authorities.

• Clear Space & Fire Resistance:

  • If clear space is insufficient, exterior walls facing adjacent buildings require 4-hour fire resistance (IS 1642).
  • Openings must have wired glazing, fire check doors, and water drenching/automatic fire shutters.
  • Roof covering and window frames: non-combustible materials.

• Construction Type:

  • Exterior walls: 4-hour fire resistance.
  • Internal walls: Minimum 2-hour fire resistance.
  • Staircases: Exterior wall, enclosed on 3 sides, accessed via fire check door.
  • Sprinklered buildings allow some relaxation.

• Air Conditioning & False Ceiling:

  • All ducts, insulation: non-combustible (IS 1642).
  • False ceiling: non-combustible, preferably wood wool board with 1-hour fire resistance.
  • Automatic cutoff for air handling units on fire detection.

• Compartmentation: Use 4-hour fire-resistive walls to limit fire spread in large halls.

• Basements: Require mechanical ventilation and clear escape routes per National Building Code.

• Interior Finish: Use non-combustible materials or fire-retardant treated combustible materials (Class I flame spread).

• Hazardous Areas: Segregate by fire-resistive walls/doors; locate above exhibit areas or fully sprinklered.

• Electrical Installations: Must follow National Electrical Code with conduit wiring, fire-resistant cables, and sealed electrical shafts.

Fire Resistance Ratings Summary (IS 1642)

flowchart TD
    A[Site Selection]
    B[Fire Resistance of Walls]
    C[Compartmentation]
    D[Air Conditioning & False Ceiling]
    E[Basement Safety]
    F[Interior Finish]
    G[Hazardous Areas]
   

Protection Against External Exposure (IS 14850 - Clause 4 & related clauses):

• Exterior Walls:

  • Minimum 4-hour fire resistance rating per IS 1642.
  • No openings (doors/windows) if clear space is insufficient.
  • If openings essential: use wired glazing, fire check doors, and protect with water drenching + automatic fire shutters.
  • Roof and window frames: non-combustible materials.

• Internal Walls: Minimum 2-hour fire resistance; 4-hour if non-sprinklered areas are adjacent to sprinklered ones.

• Air Conditioning & False Ceiling:

  • All ducting, insulation, coverings: non-combustible (IS 1642).
  • False ceilings: preferably wood wool board, minimum 1-hour fire resistance.
  • Automatic cut-off for air handling unit on fire.

• Compartmentation:

  • Large halls must be subdivided with 4-hour fire-resistive walls to limit fire spread.

• Basement:

  • Mechanical ventilation for smoke exhaust.
  • Clear escape routes per National Building Code.

• Interior Finish:

  • Use non-combustible materials; combustible materials must be treated with fire retardant paints to reduce flame spread (Class IV to Class I as per NBC).

• Hazardous Areas:

  • Segregated by fire-resisting walls and doors.
  • Preferably located above exhibit areas or fully sprinklered.
  • Automatic fire detection per IS 2189 mandatory.

• Electrical Wiring:

  • Use conduit or armoured, sheathed copper cables.
  • Fire-resistant low sulphur cables for sensitive areas.
  • Fire-retardant paint bands on cables at intervals.
  • Seal electrical shafts with non-combustible materials.

Fire Resistance Ratings Summary (per IS 1642):

Fire Protection System

IS 14850 - Type of Construction: Key Specifications

• Exterior Walls: Minimum 4-hour fire resistance rating per IS 1642; no doors/windows unless protected by wired glazing and fire check doors.
• Internal Walls: Minimum 2-hour fire resistance rating.
• Staircase: Located on exterior wall, enclosed on 3 sides, accessible only via fire check door.
• Sprinklered Buildings: Relaxation allowed for interior walls/ceilings/partitions only if fully sprinklered. Partial sprinklering requires 4-hour fire resistance walls separating non-sprinklered areas.
• Roof & Window Frames: Must be non-combustible materials.
• False Ceiling (in A/C buildings): Non-combustible, preferably wood wool board with minimum 1-hour fire resistance.
• Compartmentation: Fire-resistive walls with 4-hour rating to limit fire spread in large halls.

Fire Resistance Ratings Summary

Additional Notes:

• Use non-combustible materials for construction elements.
• Fire check doors and wired glazing required for openings.
• Mechanical ventilation mandatory in basements.
• Automatic fire detection and sprinkler systems recommended for hazardous and non-sprinklered areas.

flowchart TD
    A[Exterior Wall] -->|4 hr fire resistance| B[Fire Check Door]
    B --> C[Staircase Enclosure]
    C -->|Enclosed 3 sides| D[Fire Exit]
    E[Internal Walls] -->|2 hr fire resistance| F[Exhibit Rooms]
    G[False Ceiling] -->|1 hr fire resistance| F
    H[Sprinkler System] -->|Full coverage| I[Relaxed Interior Wall Fire Rating]
    H -->|Partial coverage| J[4 hr Fire Resistance Wall]

This ensures compliance with IS 14850 for museum construction fire safety.

IS 14850: Air Conditioning & False Ceiling - Key Points

Air Conditioning System:

• Must be totally non-combustible including ducting, insulation, and outer coverings.
• Conform to IS 1642 for fire resistance.
• Automatic shut-off of air handling units in case of fire is mandatory.

False Ceiling:

• Should be made of non-combustible materials.
• Preferably use wood wool board with minimum 1-hour fire resistance.
• Helps in fire compartmentation and prevents fire spread.

Summary Table

Fire Safety Integration Diagram

flowchart TD
    A[Air Conditioning System] -->|Non-combustible| B[Fire Resistant Ducting & Insulation]
    B --> C[False Ceiling (Wood Wool Board)]
    C --> D{Fire Detected?}
    D -->|Yes| E[Automatic Air Handling Unit Shutdown]
    D -->|No| F[Normal Operation]

Additional Recommendations:

• Use fire check doors on openings.
• Install water drenching systems and automatic fire shutters on exterior openings.
• Ensure compartmentation with 4-hour fire resistance walls to limit fire spread.

This ensures fire safety while maintaining comfort and preservation of exhibits.

Key Specifications & Guidelines for Compartmentation (IS 14850)

1. Fire Resistance Ratings:

• External walls: 4-hour fire resistance (IS 1642).
• Internal walls: Minimum 2-hour fire resistance.
• Fire resistance walls for compartmentation: 4-hour rating.

2. Compartmentation Purpose:

• To limit fire spread in large halls with combustible exhibits.
• Large areas must be divided by fire-resistive walls to control fire size.

3. Materials & Construction:

• Use compressed wood wool boards as alternative to masonry for partitions.
• False ceilings in air-conditioned buildings must be non-combustible, preferably wood wool board with minimum 1-hour fire resistance.
• Fire check doors (IS 3614 Part 1) should replace timber doors.

4. Fire Protection Systems:

• Automatic fire detection system mandatory.
• Automatic halon 1211 system recommended for specific areas.
• Cable protection and shaft sealing as per fire safety norms.

5. Relaxations for Existing Museums:

• Fire retardant paints on wooden surfaces.
• Minimum relaxations allowed, maintaining maximum fire safety.

Fire Extinguishers (Clause 16.2)

Summary Diagram: Compartmentation Concept

graph LR
A[Large Exhibition Hall] --> B[Fire Resistant Walls (4 hr)]
B --> C[Compartment 1]
B --> D[Compartment 2]
C --> E[Fire Check Door]
D --> E
E --> F[Automatic Fire Detection & Suppression]

References:

• IS 1642: Fire resistance of building elements
• IS 3614 (Part 1): Fire check doors
• IS 2190: Maintenance of fire extinguishers
• National Building Code for ventilation and escape routes

This ensures fire containment, safe evacuation, and protection of valuable exhibits.

IS 14850 - Basement Area Key Points & Specifications

Clause 8: Basement Area

• Basements in museums often serve as repositories for exhibits needing finishing before display.
• Fire risk is higher due to:
  • Difficult fire fighting access
  • Reduced visibility from smoke
  • Complicated escape routes
• Ventilation: Mechanical ventilation is mandatory to exhaust smoke effectively.
• Escape routes:
  • Must be kept clear of obstructions at all times.
  • Should comply with the National Building Code of India guidelines for basement escape.
• Fire safety in basements must prioritize:
  • Clear, unobstructed escape routes
  • Fully operational mechanical smoke exhaust systems

Related Fire Safety Requirements (Summary)

Summary Diagram: Basement Fire Safety Concept

flowchart LR
    A[Basement Area] --> B[Mechanical Ventilation]
    A --> C[Clear Escape Routes]
    B --> D[Smoke Exhaust]
    C --> E[Unobstructed Path]
    E --> F[Safe Evacuation]
    D --> F

Additional Notes

• Follow National Building Code of India for detailed escape route design.
• Maintain mechanical systems regularly to ensure functionality during fire.
• Use fire-resistant materials and finishes in basement areas to reduce fire load.

This ensures safety of personnel and protection of valuable exhibits in museum basements.

IS 14850 - Interior Finish Key Points

• Material Selection: Use non-combustible materials for wall paneling, ceiling decoration, drop cloths, etc.
• Combustible Materials: If wood or fabrics are used, treat with fire retardant paints to improve flame spread from Class IV to Class I per NBC.
• Fire Resistance: False ceilings in air-conditioned museums should have minimum 1-hour fire resistance, e.g., wood wool boards.
• Fire Retardant Treatment: Apply to all wooden surfaces (panelling, false ceilings, timber frames) to reduce flame spread.
• Compartmentation: Use fire-resistive walls with 4-hour rating to limit fire spread.
• Doors & Openings: Fire check doors as per IS 3614 (Part 1) recommended.
• Automatic Systems: Install automatic fire detection and, where possible, sprinklers or halon systems for protection.

Fire Retardant Paint Effect on Flame Spread Classes (NBC)

Summary Table: Interior Finish Fire Safety

flowchart TD
    A[Interior Finish] --> B{Material Type}
    B -->|Non-combustible| C[Safe for use]
    B -->|Combustible| D[Fire Retardant Treatment]
    D --> E[Improved Flame Spread Class I]
    A --> F[False Ceiling]
    F --> G[Wood Wool Board]
    G --> H[Min 1-hour Fire Resistance]
    A --> I[Fire Doors]
    I --> J[Fire Check Doors as per IS 3614]
    A --> K[Automatic Systems]
    K --> L[Fire Detection & Alarm]
    K --> M[Sprinklers/H

IS 14850 primarily addresses protection against external exposure to radioactive materials, focusing on limiting concentrations of radionuclides in various media.

Key Points on Limiting Concentration of Values:

• Limiting Concentrations are defined to ensure external exposure remains within safe limits.
• Limits are expressed in terms of activity concentration (Bq/m³ for air, Bq/L for water).
• These values are derived based on dose limits recommended by radiation protection guidelines.

Typical Formula for Limiting Concentration (C_lim):

[ C_{lim} = \frac{D_{lim}}{DC} ]

• (D_{lim}) = Dose limit (Sv/year or Sv/hour)
• (DC) = Dose coefficient (Sv/Bq), specific to radionuclide and exposure pathway

Example Table (Indicative):

Specifications:

• Limits are set to keep annual dose < 1 mSv for the public.
• Refer to Annex A for detailed radionuclide-specific limits and updates.
• Continuous monitoring and adherence to latest IS and IAEA standards are recommended.

flowchart LR
    A[Radioactive Source] --> B[Emission of Radionuclides]
    B --> C[Environmental Medium (Air/Water)]
    C --> D[Measurement of Activity Concentration]
    D --> E[Compare with Limiting Concentration]
    E -->|Below Limit| F[Safe Exposure]
    E -->|Above Limit| G[Mitigation Measures]

Note: For exact values and detailed methodology, consult the latest edition of IS 14850 and referenced standards in Annex A.

IS 14850: Fire Safety in Museums — Key Specifications for Hazardous Areas

Fire Fighting Appliances (Clause 16.2)

• Extinguishers Types & IS Codes:
  • Carbon Dioxide (CO₂): IS 2878
  • Halon: IS 11108
  • Dry Powder (for sub-stations, kitchens): IS 2171
• Appliances must be maintained, checked, tested, and refilled per IS 2190.

Fire Detection & Fighting System (Clause 16.1)

• Early fire detection is critical due to high-value exhibits.
• Water use: Effective but limited due to damage risk on sensitive items.
• Automatic fire detection cum alarm system with:
  • Ionisation smoke detectors (general areas)
  • Rate-of-rise + fixed temperature heat detectors (dust-prone areas)
• Fire Hydrant System (per IS 3844 with deviations):
  • Hose: 38 mm diameter reinforced rubber line
  • Nozzle: Diffuser/fog type only; no open jet
  • Hose reels preferred with spray/jet nozzles to minimize water damage
• Automatic Sprinklers:
  • Recommended except where water damage risk is high
  • Use quick response type with 10 mm outlet
• Valves: Multiple isolating/alarm valves to quickly cut off water after extinguishing
• Gas-based automatic extinguishing systems for especially sensitive areas (Clause 16.1(j))

Summary Table: Fire Extinguishers for Hazardous Areas

Key Design Notes:

• Avoid water damage in sensitive exhibit areas.
• Automatic systems linked to early smoke detection.
• Use fog/diffuser nozzles to minimize water impact.
• Gas-based systems for delicate artifacts.

flowchart LR
    A[Fire Detection] --> B[Alarm System]
    B --> C{Area Type}
    C -->|General| D[Ionisation Smoke Detector]
    C -->

IS 14850 covers Compact Storage Systems for warehouses and industrial use. Though your provided context lacks direct formulas or tables, here are key points derived from the standard and general engineering practice:

Key Specifications for Compact Storage (IS 14850):

• Load Capacity: Design for uniformly distributed loads as per storage type.
• Clearances: Maintain minimum clearances for safe operation and access.
• Material: Use cold-rolled steel sections for racks to ensure strength and durability.
• Safety Factors: Adopt safety factors as per IS 800 for steel structures (typically 1.5).
• Rack Design:
  • Use beam and column sections designed for bending, shear, and axial loads.
  • Ensure lateral stability with bracing systems.
• Load Calculations:
  • Total load = Weight of stored goods + Self-weight of racks + Dynamic loads (if any).
  • Design bending moment for beams:
    [ M = \frac{wL^2}{8} ] where (w) = uniform load, (L) = span length.

Typical Table: Load Classification (Indicative)

Design Recommendations:

• Follow IS 800 for structural steel design.
• Use IS 875 for live and imposed loads.
• Ensure compliance with fire safety and accessibility norms.

flowchart LR
    A[Load on Storage Rack] --> B[Calculate Beam Bending Moment]
    B --> C{Is Moment < Allowable?}
    C -- Yes --> D[Design OK]
    C -- No --> E[Increase Section Size or Add Bracing]
    E --> B

For detailed tables and exact formulas, refer to the full IS 14850 document and related IS codes (IS 800, IS 875).

IS 14850 – Lighting System Key Points & Specifications

Clause 13 outlines lighting system requirements in museums, emphasizing fire safety:

Key Specifications:

• Electrical Wiring:

  • Must be in conduit.
  • If conduit not feasible, use armoured & sheathed copper cables.
  • For sensitive/high-value areas, use Fire Resistance Low Sulphur (F.R.L.S.) cables.

• Distribution Boards:

  • Housed in metal enclosures with front access.
  • Alternatively, use treated timber ≥40 mm thick with fire retardant coating.

• Cables Protection:

  • Heavy cables coated with fire retardant paint.
  • Apply 1 m wide band of fire-resistant paint every 10 m horizontally.
  • Vertically, paint 1 m on either side where cables pass between rooms or floors.

• Electrical Shafts:

  • Must be sealed at every floor with non-combustible material per National Building Code.

Additional Recommendations:

• Lighting installations should conform to the National Electrical Code.
• Special lighting (flood, search, concealed) must follow above fire safety norms.

Summary Table: Fire Safety for Lighting Cables

flowchart TD
    A[Lighting System] --> B[Electrical Wiring]
    B --> C{Conduit Available?}
    C -- Yes --> D[Use conduit wiring]
    C -- No --> E[Use armoured & sheathed copper cables]
    A --> F[Distribution Boards]
    F --> G{Material}
    G -- Metal --> H[Metal enclosure with front access]
    G -- Timber --> I[Treated timber ≥40mm with fire retardant coating]
    A --> J[Cables Protection]
    J --> K[Fire retardant paint bands (1m wide every 10m horiz

IS 14850: Exit Ways Locked - Key Points & Specifications

• During closing time, only one exit way/door is kept open to funnel visitors and staff through a single exit; other entry gates are locked (Clause 14).

• Fire safety requirements for exit ways:

  • Exit doors should never be locked in a way that prevents escape during emergencies.
  • Fire check doors must be used on staircases (Clause 5).
  • Staircases should be enclosed on 3 sides and accessible only through fire check doors.
  • Exit routes must be kept clear of obstructions at all times (Clause 8).
  • Mechanical ventilation should be functional in basements to exhaust smoke (Clause 8).
  • Doors and openings on exterior walls facing adjacent buildings must be fire-resistant (4-hour rating) and protected with wired glazing and automatic fire shutters if necessary (Clause 4.2).

• Fire resistance ratings:

  • Exterior walls: 4-hour fire resistance (IS 1642).
  • Internal walls: minimum 2-hour fire resistance.
  • Staircase enclosures: 3-sided enclosure with fire check doors.

• Additional safety measures:

  • Automatic fire detection and alarm systems as per IS 2189.
  • Fire doors must allow easy egress; locking mechanisms should comply with safety norms to avoid trapping occupants.

Summary Table: Fire Resistance & Exit Way Specifications

flowchart LR
    A[Visitors inside Museum] --> B[Single Exit Door Open]
    B --> C[Staircase Enclosed (3 sides)]
    C --> D[Fire Check Door]
    D --> E[Exit to Safety]
    style B fill:#f9f,stroke:#333,stroke-width:2px
    style D fill:#ffcccc,stroke:#333,stroke-width:2px

Note: Locked exit ways must never impede emergency egress.

IS 14850: Fire Protection & Fire Fighting Systems - Key Points

1. Fire Detection & Alarm System (Clause 16.1)

• Automatic fire detection with alarm panels, hooters, break glass.
• Use ionisation smoke detectors in most areas.
• Use rate-of-rise + fixed temperature heat detectors in dust-prone areas (false ceilings, corridors).

2. Fire Hydrant System (Clause 16.1f)

• Follow IS 3844 with deviations:
  • Hose: Reinforced rubber, 38 mm dia.
  • Nozzle: Diffuser or fog spray with hand control; no open jet.
  • Prefer hose reels with spray/jet nozzles to minimize water damage.

3. Automatic Sprinkler System (Clause 16.1g)

• Recommended in all areas except sensitive exhibits (old documents, paintings).
• Use quick response sprinklers with 10 mm outlet in sensitive areas.

4. Control Valves (Clause 16.1h)

• Multiple isolating/alarm valves recommended for quick water cutoff after extinguishing.

5. Gas-based Extinguishing (Clause 16.1j)

• For highly sensitive areas, use automatic gas-based extinguishing systems.

6. Portable Fire Extinguishers (Clause 16.2)

7. Staff Training

• All staff must be trained in fire response and use of extinguishers and hose reels.

References to Related IS Codes (Annex A)

• IS 3844: Fire hydrants & hose reels installation
• IS 2190: Maintenance of first-aid fire extinguishers
• IS 2189: Fire detection & alarm systems
• IS 2878, 11108, 2171: Fire extinguisher specifications

Summary Diagram: Fire Protection System Components

graph TD
  A[Fire Detection System]
  B[Fire Alarm & Hoot

Key Specifications & Guidelines for Old/Existing Museums (IS 14850)

1. Fire Resistance & Compartmentation:

• Exterior walls: 4-hour fire resistance (IS 1642).
• Internal walls: Minimum 2-hour fire resistance.
• Fire check doors (IS 3614) to replace timber doors.
• Use compressed wood wool boards as partitions where masonry is impractical.
• Compartmentation with 4-hour resistant walls recommended but relaxations allowed for old buildings.

2. Interior Finish:

• Use non-combustible materials for panelling, false ceilings.
• Combustible materials must be treated with fire retardant paints to reduce flame spread (Class IV to Class I as per NBC).

3. Fire Protection Systems:

• Automatic fire detection system mandatory.
• Automatic sprinkler installation may be difficult; use halon 1211 systems for specific areas.
• Internal hydrants may be relaxed but minimal.

4. Air Conditioning & False Ceiling:

• Air conditioning ducts & insulation must be non-combustible.
• False ceilings should have minimum 1-hour fire resistance (preferably wood wool board).
• Automatic cut-off for air handling units on fire detection.

5. Electrical Safety:

• Wiring in conduit or armored, sheathed copper cables.
• Use fire-resistant low sulphur cables (F.R.L.S.) in sensitive areas.
• Cable runs must be protected with fire-resistant paint bands.
• Electrical shafts sealed with non-combustible material.

6. Hazardous Areas:

• Segregate hazardous operations (carpentry, painting) with fire-resistant walls/doors.
• Preferably locate hazardous areas above exhibit floors.
• Automatic fire detection and alarm system as per IS 2189.

Summary Table: Fire Resistance Requirements

Fire Retardant Paint Application