NZS 4512:2010
Cl 405.3
Detector spacing, wall distance and coverage
The detector spacing tool reads one row per detector type. Each row holds the spacing, the corridor spacing, the wall distance and the corridor wall distance. It holds the floor area per detector and the longest distance from any point to a detector, line or beam. Last is the limit below the apex of a sloping roof. A null wall distance means Clause 405.3 states none for that type.
Verified: read against the printed standard, pages 43, 52–53, 59–60. Checked 26 Sept 2026.
Units: Max spacing M m, Max spacing corridor M m, Max wall M m, Max wall corridor M m, Max area M 2 m², Max point distance M m, Apex mm mm
These are the values AmpSize encodes. No text of the standard is reproduced. Verify against the current standard.
4 rows
| Type | Max spacing M (m) | Max spacing corridor M (m) | Max wall M (m) | Max wall corridor M (m) | Max area M 2 (m²) | Max point distance M (m) | Apex mm |
|---|---|---|---|---|---|---|---|
| point-heat | 6 | 9 | 3 | 4.5 | 30 | — | 500 |
| line-heat | 8 | — | — | — | — | 4 | 500 |
| point-smoke | 10 | — | 5 | — | — | 7 | 500 |
| beam-smoke | 14 | — | — | — | — | 7 | 600 |