Lift, stair and fire-fighting lobbies: leakage to the floor, stair and lift shaft, fire-floor door open, stair > lobby > floor hierarchy, relief per lobby, fan, BOQ.
NBC 2016 Part 4 · BS EN 12101-6 · NFPA 92
| Field | Type / default | Meaning |
|---|---|---|
| Code & criteria | ||
| Code basis | choice default india | India — NBC 2016 Part 4 targets + BS EN 12101-6 method, BS EN 12101-6 / EN 12101-13 classes (UK, Gulf, Europe), NFPA 92 / NFPA 101 (US, international) |
| Purpose (sets the open-door air speed) | choice default escape | Means of escape — 0.75 m/s, Escape + fire-fighting — 2.0 m/s |
| BS EN 12101-6 system class | choice default A | Class A — means of escape, defend in place, Class B — means of escape and fire-fighting, Class C — escape by simultaneous evacuation, Class D — escape, sleeping risk, Class E — escape by phased evacuation, Class F — fire-fighting system and means of escape |
| Building sprinklered | yes / no default True | |
| Ceiling height of the fire floor (non-sprinklered) | choice default 2.7 | 2.7 m — 25 Pa, 4.6 m — 35 Pa, 6.4 m — 45 Pa |
| Lobby pressure difference, doors closed (0 = code: NBC 30 Pa · EN class · NFPA min) | number (Pa) default 0 | |
| Air speed through the open door (0 = by purpose / class) | number (m/s) default 0 | |
| Maximum door-opening force (0 = code: India 110 N · EN 100 N · NFPA 133 N) | number (N) default 0 | |
| Door-closer force at the handle | number (N) default 40 | |
| Building | ||
| Floors with a pressurised lobby | number default 15 | |
| Floor-to-floor height | number (m) default 3.3 | |
| Lobby | ||
| Lobby | choice default common | Stair lobby, Lift lobby, Lift + stair (fire-fighting) lobby |
| Doors lobby → floor (accommodation) | number default 1 | |
| Lobby → floor door | choice default single_in | Single leaf — opens into the pressurised space (0.01 m²), Single leaf — opens out of it (0.02 m²), Double leaf (0.03 m²) |
| Lobby → floor door width | number (m) default 1.0 | |
| Lobby → floor door height | number (m) default 2.1 | |
| Door leakage from | choice default table | BS EN 12101-6 Table A.2 values, Gaps round the leaf (mm) |
| Gap — sides (each) | number (mm) default 3 | |
| Gap — head | number (mm) default 3 | |
| Gap — threshold (undercut) | number (mm) default 6 | |
| Lobby → stair door | choice default single_out | Single leaf — opens into the pressurised space (0.01 m²), Single leaf — opens out of it (0.02 m²), Double leaf (0.03 m²) |
| Lobby → stair door width | number (m) default 1.0 | |
| Stair pressurised too | yes / no default True | |
| Stair ΔP (to the floor) | number (Pa) default 50 | |
| Lift landing doors into the lobby | number default 2 | |
| Lift well pressurised too | yes / no default False | |
| Lift-well ΔP (to the floor) | number (Pa) default 50 | |
| Include lobby wall leakage (ASHRAE ratios — BS practice leaves it to the unidentified allowance) | yes / no default False | |
| Lobby wall construction | choice default average | Tight, Average, Loose |
| Lobby length | number (m) default 3.0 | |
| Lobby width | number (m) default 2.0 | |
| Fire-floor door open | ||
| Lobby → floor doors open at the fire floor | number default 1 | |
| ΔP across the lobby's other doors, door open | number (Pa) default 10 | |
| Fan, ducts & air distribution | ||
| Allowance for unidentified leakage | number (%) default 25 | |
| Duct leakage allowance on the fan | number (%) default 15 | |
| Over-pressure control | choice default prd | Barometric pressure-relief damper(s), Pressure sensors + VFD on the fan |
| Standby fan (duty + standby) | yes / no default True | |
| Duct run fan → farthest outlet (0 = shaft height + 10 m) | number (m) default 0 | |
| Duct friction | number (Pa/m) default 1.0 | |
| Fittings allowance on duct friction | number (%) default 50 | |
| Intake louvre + dampers + grille losses | number (Pa) default 125 | |
| Fan total efficiency | number (%) default 60 | |
| Supply grille face velocity | number (m/s) default 3.0 | |
| Riser duct velocity | number (m/s) default 8.0 | |
| Output | Content |
|---|---|
| Results, checks, worked steps, schedules; report, Excel and DXF exports. | |