1. System Objective
The fire and life safety system provides multi-layered, fail-safe protection for the entire 900 m tower. It ensures immediate fire detection, rapid containment, safe evacuation, structural thermal protection, and autonomous operation during system failures.
2. Global Fire Strategy
Defense-in-Depth Layers
- Detection — early sensing
- Containment — compartmentalization
- Suppression — active fire control
- Smoke Management — visibility + breathable paths
- Egress Protection — safe evacuation routes
3. Fire-Rated Structural Assemblies
Primary Fire Walls
- Rating: 4 hours
- Thickness: 300–400 mm
- Construction:
- Reinforced concrete core
- Intumescent coating (3–5 mm)
- Fire-rated board lining
Secondary Compartment Walls
- Rating: 2 hours
- Thickness: 150–250 mm
- Max compartment size: 2,000 m²
- Vertical zoning: every 20 floors
Floor Assemblies
- Rating: 3 hours
- Slab thickness: 250–350 mm
- Fireproofing: 25–40 mm cementitious coating
Structural Steel Protection
- Columns: 40–75 mm fireproofing
- Beams: 25–50 mm fireproofing
4. Smoke Extraction System (Exploded)
Duct Dimensions
| Main Shafts | 2.0–3.5 m wide × 1.5–2.5 m high |
|---|---|
| Branch Ducts | 600–1200 mm wide |
Airflow Capacity
- Extraction rate: 10–15 ACH
- Fan capacity: 100,000–300,000 m³/h per zone
High-Temperature Fans
- Rated 400°C for 2 hours
- Redundancy: N+1
Smoke Zoning
- Zoning per floor or half-floor
- Isolation via 2-hour fire-rated motorized dampers
5. Pressurized Egress Systems
Stairwell Pressurization
| Pressure | +50 to +75 Pa |
|---|---|
| Door Opening Force | < 110 N |
Air Supply System
- Pressurization fans: 20,000–60,000 m³/h
- Redundant ducts in separate shafts
Elevator Shaft Protection
- Pressurized or smoke-isolated shafts
- Firefighter lobbies: +25 Pa
6. Fire Doors & Compartmentation
Fire Door Ratings
| Core Zone Doors | 3-hour — 75–100 mm |
|---|---|
| Corridor Doors | 1.5-hour — 50–75 mm |
| Equipment Rooms | 2-hour — 60–80 mm |
Door Features
- Self-closing mechanisms
- Intumescent smoke seals
- Automatic magnetic release
Compartment Zones
- Horizontal zoning: every 1,500–2,000 m²
- Vertical zoning: refuge floors every 20–25 floors
7. Fire Detection & Alarm System
Sensor Density
| Smoke Detectors | 1 per 50 m² |
|---|---|
| Heat Detectors | 1 per 70 m² |
| Flame Detectors | Critical zones only |
| Gas Detectors | Mechanical areas |
System Components
- Addressable fire alarm panels
- Voice evacuation system
- Visual + audible alarms
Response Time
- Detection: < 5 seconds
- Alarm activation: < 2 seconds
8. Fire Suppression Systems
Sprinkler System
- Type: Wet + pre-action hybrid
- Discharge density: 10–20 mm/min
Standpipe System
- Pipe diameter: 150–250 mm
- Pressure: 8–20 bar
Special Suppression
- Data centers: FM‑200 / Novec 1230
- Electrical rooms: Gas suppression
9. Water Supply & Storage
Fire Water Tanks
- Total capacity: 5,000–10,000 m³
- Intermediate tanks every 50–70 floors
Pump Systems
- Fire pumps: 2,000–5,000 L/min
- Redundancy: Diesel + electric
10. Emergency Egress Design
Staircase Design
| Width | 1.4–2.0 m |
|---|---|
| Max Travel Distance | ≤ 30 m |
Refuge Floors
- Every 20–25 floors
- Area ≥ 1,500 m²
- 4-hour fire-rated enclosure
11. System Redundancy & Failsafe Design
| Fire Detection | Dual-loop |
|---|---|
| Power Supply | UPS + generator |
| Pumps | N+1 |
| Fans | N+1 |
Fail Conditions
- Operates during power outage
- Operates during partial structural damage
- Operates during communication loss
12. Control & Integration Logic
System Interactions
- Fire detection → alarm activation
- Fire detection → smoke extraction
- Fire detection → elevator recall
- Fire detection → door release
Central Command System
- Integrated with Section 15 (Smart Infrastructure)
- Real-time fire mapping
- Automated response sequencing
- Manual override capability
13. Performance Targets
| Detection Time | < 5 sec |
|---|---|
| Evacuation Time | < 90 min (full building) |
| Smoke Clearance | < 10 min |
| System Uptime | 99.999% |
14. Installation Sequence
- Install fire-rated structural elements
- Install vertical smoke + stair shafts
- Install suppression piping
- Install detection network
- Install pressurization systems
- Integrate alarm + BAS systems
- Perform full fire simulation testing
15. Engineering Logic Summary
- Compartmentation limits fire spread
- Pressurization ensures survivable escape routes
- Smoke extraction preserves visibility + oxygen
- Redundancy ensures operation during catastrophic events
- Smart system integration enables automated response
16. Why This Section Is Critical
This system is the final barrier between a controlled incident and catastrophic structural failure. It transforms the skyscraper into a self‑protecting, life‑preserving system under extreme fire conditions.
