Fire Service Spacer — Smoke Detection + Emergency Lighting

Optimum spacing for point smoke detectors (AS 1670.1:2024 Cl 5.1) and emergency luminaires (AS/NZS 2293.1:2005 Tables 5.1–5.5). Units: m · m².

Inputs

Cl 5.1 / Fig 5.1.1A: point smoke detectors max 10 m spacing, within 5 m of walls. Deep beams reduce spacing 30% to 7 m.

Spacing optimiser

m × m    Total: devices
ItemLength (L)Width (W)
Devices
Spacing (m)
Between devices (m)
Max from wall (m)
L →

Coverage & standard check

ParamValue
Charge area / device (m²)
Max distance from wall (m)
Standard basis
Calc method
Max spacing permitted (m)
Min illuminance @ worst point (lx)