Fire Safety for Multi-Storey Car Parks in India: Sprinklers, Smoke Management, and EV Considerations (2026)

Multi-storey car parks (MSCPs) present unique fire safety challenges. High vehicle densities, limited natural ventilation, and the increasing presence of electric vehicles (EVs) with their unique fire risks have made car park fire safety a growing concern for building owners, facility managers, and fire authorities across India. Under NBCS 2026, car parks have specific fire safety requirements that go beyond general building provisions. This guide covers all mandatory systems and best practices.

Why Car Parks Are High-Risk Environments

• High fire load: Modern vehicles contain significant combustible materials — plastic components (up to 50% of vehicle weight by some estimates), fuel (for ICE vehicles), upholstery, tyres.
• Limited occupant awareness: People in car parks are typically focused on parking — they may not notice a developing fire for several minutes.
• Difficult access for fire fighters: Multi-storey car parks have limited vehicle access (height and weight restrictions for fire tenders). Narrow ramps and spiral layouts impede fire fighter movement.
• Smoke logging: Without mechanical smoke extraction, smoke can fill the entire car park volume in minutes — significantly reducing visibility for evacuation.
• EV fire risk (new): Lithium-ion battery fires in EVs are difficult to extinguish, can reignite hours later, and produce toxic hydrogen fluoride gas.

NBCS 2026 Fire Safety Requirements for Multi-Storey Car Parks

Under NBCS 2026 Part 4, Section 7 (Parking Buildings), the following are mandatory for MSCPs attached to or part of other buildings:

Automatic Sprinkler System

• Required for all car parks located below ground level (basement parking) — regardless of size.
• Required for car parks above ground if the car park is part of a building with sprinklered upper floors (entire building must be sprinklered).
• Required for any car park with more than 50 parking spaces (even if stand-alone).
• Design per IS 15105 or NFPA 13 — ordinary hazard group 2 occupancy (minimum 0.15 gpm/sq ft density over 1,500 sq ft design area).

Smoke Management System (Mechanical Extraction)

• Mandatory for all basement car parks — natural ventilation insufficient for basement environments.
• Mandatory for enclosed above-ground car parks (no open sides).
• Extraction rate: Minimum 10 air changes per hour for normal operation, 15 air changes per hour in fire mode (NBCS 2026, increased from 6 ACPH in NBC 2016).
• Smoke extraction system must be connected to the building's fire alarm system — automatically activates upon fire detection.
• Make-up air inlets (fresh air supply) must be provided at low level — typically at least 50% of extraction rate.
• For car parks with EV charging bays: Minimum 15 ACPH extraction rate regardless of basement or above-ground (due to toxic gas risk from battery fires).

Fire Hydrant System (Wet Riser)

• Required for car parks with floor area exceeding 1,000 sq. metres (cumulative across all levels).
• Landing valves required on each floor — minimum one landing valve per 500 sq. metres.
• In basement car parks, landing valves must be located at each staircase landing.
• Hose reels (30 metres length) at each landing valve location.

Fire Detection and Alarm

• Heat detectors (not smoke detectors — dust and vehicle exhaust cause false alarms) throughout car park.
• Rate-of-rise or fixed temperature (57°C/68°C) heat detectors — spacing per IS 2189.
• For EV charging zones: Thermal monitoring sensors plus gas sensors (HF, HCN, CO) required additionally.
• Manual call points (break-glass) at every exit staircase and at maximum 30 metre spacing.
• Visual alarm strobes for hearing-impaired — particularly important in car parks where engine noise can mask audio alarms.

Emergency Lighting

• 100% coverage of car park floor area — no dark corners.
• Minimum 1 lux illuminance along escape routes.
• 3-hour battery backup minimum.
• Exit signs (photoluminescent or LED) at all exits and at changes of direction.

Fire Separation

• Car parks attached to other occupancies (residential, commercial, hotel) must be separated by 2-hour fire-rated walls and floors (FD120 door assemblies at connections).
• Car park staircases must be separate from main building stairs unless designed as pressurised smoke-free lobbies.
• Ventilation ducts serving the car park must have fire dampers (F-120) at penetration points through fire-rated separations.

Fire Safety Products for Multi-Storey Car Parks

1. Foam-Water Sprinkler Systems (For Basement Car Parks with High Fuel Load)

For basement car parks with significant ICE vehicle presence, foam-water sprinkler systems are sometimes preferred over standard water sprinklers. Foam solution (AFFF or FFFP at 1–3%) forms a blanket over liquid fuel spills, preventing vapour ignition and extinguishing pool fires. NFPA 13 allows foam-water systems for ordinary hazard occupancies where flammable liquid risk is present.

2. EV Fire Containment Blankets (Parked EVs)

Car park operators (particularly those with dedicated EV parking or charging) should maintain EV fire blankets at strategic locations. If an EV catches fire in a car park, the blanket can be deployed to contain the fire and toxic gases while the fire brigade is en route.

Recommended quantity: Minimum 1 blanket per 20 EV charging bays.

3. Portable CO? Trolley Extinguishers (22.5 kg)

CO? is effective on Class B (fuel) and Class C (electrical) fires and leaves no residue. For initial response to a small engine fire or electrical fire in a vehicle, CO? is preferable to dry powder which would require extensive clean-up.

4. Thermal Monitoring and Gas Detection for EV Zones

Dedicated EV charging zones within car parks require specialised detection:

• Thermal cameras or fiber optic temperature sensing along charging bay lines.
• Hydrogen fluoride (HF) sensors — HF gas is released from burning lithium-ion batteries and is lethal at concentrations as low as 50 ppm.
• Hydrogen (H?) sensors — monitoring for hydrogen off-gassing from damaged or malfunctioning batteries.
• Detection system must be integrated with car park fire alarm and smoke extraction.

Ventilation Design for Car Park Fire Safety

Natural Ventilation (for Above-Ground, Open-Side Car Parks)

Car parks with open sides (perforated facade, open louvers) can rely on natural ventilation if:

• At least 50% of each floor perimeter is open to outside air.
• Openings are distributed around the floor to provide cross-ventilation.
• Clear height to ceiling is at least 2.5 metres (to allow smoke layer to form without descending to occupant level).
• No enclosed fire compartments larger than 2,000 sq. metres.

Mechanical Smoke Extraction (for Basement and Enclosed Car Parks)

Mandatory for all basement car parks under NBCS 2026. System design requirements:

• Smoke extraction fans: Located at high level (ceiling or upper wall). Must be rated for 250°C continuous operation for 2 hours (minimum).
• Make-up air inlets: At low level (typically near floor) to allow fresh air to replace extracted smoke.
• Zoning: Car parks larger than 2,000 sq. metres per floor should be divided into smoke zones of ?2,000 sq. metres, with dedicated extraction per zone.
• Automatic activation: Via heat detectors or water flow from sprinkler system. Must activate within 60 seconds of fire detection.
• Manual override: Fire brigade must have manual control over smoke extraction fans.

EV Charging Zones in Car Parks — Additional Requirements (NBCS 2026)

Car parks with EV charging stations have additional requirements beyond standard car park provisions:

• EV charging bays must be located at least 3 metres from any exit staircase or fire lift (to ensure escape route remains tenable).
• Maximum 5 EV charging bays per fire compartment — compartment walls (2-hour rated) between groups of bays.
• Dedicated water storage for EV zone — minimum 5,000 litres for the first 4 bays, plus 1,000 litres per additional bay (in addition to standard car park fire water tank).
• Fire-resistant canopies over EV charging bays — minimum 1-hour rating, to contain any fire to the bay of origin.
• Emergency shut-off readily accessible at each bay — cuts power to all chargers in the zone.
• Signage: "EV CHARGING — IN CASE OF FIRE, SHUT OFF POWER, EVACUATE, CALL 101" posted at each bay.

Car Park Fire Safety Checklist for Building Owners / Facility Managers

Monthly

• ? Test smoke extraction fan operation (run for 5 minutes minimum).
• ? Check that no storage (tyres, oil drums, pallets, boxes) is present in car park — this is a serious violation.
• ? Ensure fire extinguishers in car park are present, pressure in green, tags signed.
• ? Verify emergency lights at exits and along escape routes are working.
• ? Check that EV charging zone thermal sensors are showing normal readings.

Quarterly

• ? Test fire alarm activation in car park — ensure all sounders/strobes function.
• ? Test smoke extraction system in fire mode (smoke test or air balance measurement).
• ? Inspect fire dampers in HVAC penetrations — ensure they close fully and seal.
• ? Conduct car park fire drill (coordinate with building management).

Annually

• ? Third-party fire safety audit including car park.
• ? Test sprinkler system — flow test from a representative sample of heads.
• ? Service all fire extinguishers.
• ? Test emergency lighting full 3-hour backup.
• ? Renew Fire NOC.

#CarParkFireSafety #MultiStoreyCarPark #BasementParking #SmokeExtraction #EVChargingFire #NBCS2026 #ParkingFire #FoamSprinkler #BuildingFireSafety #ElectricVehicleFire