Chapter 4
Site Planning & External Firefighting Provision
Chapter 4 governs the provision of space, roads, and infrastructure around buildings to enable effective external firefighting operations by SCDF. It sets out requirements for fire engine accessways and access roads (widths, gradients, turning facilities, loading), fire access openings in external walls, proximity to rising main breeching inlets, and private fire hydrant provision and water supply. The requirements scale with building Purpose Group, habitable height, and floor area.
Scope: All buildings requiring fire engine access in Singapore, covering Purpose Groups I–VIII. Specific provisions vary by PG classification, habitable height, accessible floor area (for PG III–VII) and gross cubical extent (for PG VI & VIII).
Source: SCDF Code of Practice for Fire Precautions in Buildings 2023. This is a guidance summary — always verify against the full Fire Code clause text.
Critical points
Fire access openings must be ≥850mm wide × 1m high, sill height ≤1.1m (or ≤1.25m at roof garden/terrace), head height ≥1.8m above inside finished floor level.
CriticalClause 4.2.3dA minimum clearance area of 3.5m (W) × 2.5m (H) shall be maintained around the fire access opening; minimum clearance below lower edge is 1.1m, above upper edge is 400mm.
CriticalClause 4.2.3aFire access openings must be readily openable from inside AND outside; inside and outside shall remain unobstructed at all times; no obstruction within 1m of the landing inside.
CriticalClause 4.2.3aOpening location: must face an occupied space — NOT plant/store rooms, common corridors, exit staircases, smoke-free approaches, or dead-ends.
CriticalClause 4.2.3bFor PG III–VIII, every 20m of fire engine accessway (or part thereof) must have one fire access opening; openings shall be spaced ≤20m apart along the external wall.
ImportantClause 4.2.3e.(1) & (2)For PG III–VIII where ceiling height exceeds 10m, additional high-level ventilation openings for smoke venting must be provided (unless an engineered smoke control/purging system is installed).
ImportantClause 4.2.3e.(4)Exemptions: PG I and PG II buildings (including ancillary non-residential uses within residential occupancy) and aboveground multi-storey car parks complying with Cl.3.2.8 ventilation are exempt from fire access openings.
NoteClause 4.2.3f
Compliance thresholds
| Parameter | Value | Condition | Clause |
|---|---|---|---|
| Minimum width of fire access opening | 850 mm | All fire access openings (PG III–VIII) | Clause 4.2.3d |
| Minimum height of fire access opening | 1 m | All fire access openings | Clause 4.2.3d |
| Maximum sill height (standard) | 1.1 m | Standard fire access openings (above inside finished floor level) | Clause 4.2.3d |
| Maximum sill height (roof garden/terrace exception) | 1.25 m | Fire access openings at roof garden or terrace | Clause 4.2.3d (Exception 1) |
| Minimum head height above inside finished floor level | 1.8 m | All fire access openings | Clause 4.2.3d |
| Minimum clearance area around fire access opening (width) | 3.5 m | Required clear width around opening | Clause 4.2.3a |
| Minimum clearance area around fire access opening (height) | 2.5 m | Required clear height around opening | Clause 4.2.3a |
| Minimum clearance below lower edge of opening | 1.1 m | Measured from lower edge of opening downward | Clause 4.2.3a |
| Minimum clearance above upper edge of opening | 400 mm | Measured from upper edge of opening upward | Clause 4.2.3a |
| Max spacing between fire access openings along external wall | 20 m (centre to centre) | PG III–VIII buildings | Clause 4.2.3e.(2) |
| Frequency of fire access opening per accessway length | 1 per 20 m of fire engine accessway (or part) | PG III–VIII | Clause 4.2.3e.(1) |
| Ceiling height threshold requiring additional smoke venting openings | > 10 m | PG III–VIII spaces without engineered smoke control | Clause 4.2.3e.(4) |
| Triangular signage minimum side length (external triangle marking) | 150 mm (per side, equilateral) | External red/orange triangle on fire access opening panel | Clause 4.2.3c |
| Internal signage text minimum height | 25 mm | Wording 'Firefighting Access – Do Not Obstruct' on internal side | Clause 4.2.3c |
Interactive decision tree
Determine fire access opening requirements