Egress Lighting Illuminance Compliance Check (NFPA 101 / IBC)
Egress illuminance against NFPA 101 / IBC.
Example
You enter
- Average illuminance (fc) 1.2
- Minimum illuminance (fc) 0.15
- Maximum illuminance (fc) 3
- Mode normal
You get
- Max (min) 20
Details, formula, and sources
Normal 1.0 fc avg / 0.1 fc min, emergency 90-min end 0.6 / 0.06, max/min <= 40:1. A 1.2/0.15/3.0 fc corridor is compliant; a 0.05 fc dark spot fails the emergency minimum even at a good average. The adopted code and AHJ govern.
normal: avg >= 1.0 fc, min >= 0.1 fc; emergency 90-min end: avg >= 0.6 fc, min >= 0.06 fc; max/min <= 40:1; pass = all.
The NFPA 101 Life Safety Code / IBC means-of-egress illumination requirements, by name.
The egress illumination minimums are in NFPA 101 and the IBC (NFPA publishes free-to-read access; many jurisdictions post the adopted IBC). The adopted edition and the AHJ govern.
Estimate. AHJ and licensed professional govern.
Field names used by the API: avg_fc, min_fc, max_fc, mode, max_min
- Normal minimums 1.0 fc average, 0.1 fc minimum along the egress pathNFPA 101 / IBC
- Emergency 90-min 0.6 fc average, 0.06 fc minimum at the end of the 90-minute periodNFPA 101 / IBC
- 40:1 ratio maximum-to-minimum must not exceed 40:1; verify the adopted editionscope of this tile