07.B.05 Means of Egress.
- Means of egress must be illuminated, with emergency and non-emergency lighting, to provide a minimum of 5 lm/ft2, (55 lx), measured at the floor. > Reference IESNA Handbook.
- The illumination must be arranged so that the failure of any single lighting unit, including the burning out of an electric bulb, will not leave any area darkened to the point of impeding the means of egress.
07.B.06 If work is to be performed at night, a night operations lighting plan must be developed to ensure that all activities, areas and operations are adequately illuminated to perform work safely. On-task lighting must be in conformance with Table 7-1. Lighting near roadways and other public transportation areas must be positioned as to avoid creating a glare hazard.
| Facility or Function | Lux | Foot-candles (lm/ft2) |
|---|---|---|
| Accessways - general indoor - general outdoor - exitways, walkways, ladders, stairs |
55 33 110 |
5 3 10 |
| Administrative areas (offices, drafting and
meeting rooms, etc.)
|
540 | 50 |
| Chemical laboratories | 540 | 50 |
| Construction areas - general indoor - general outdoor - tunnels and general underground work areas (min 110 lux required at tunnel/shaft heading during drilling, mucking, and scaling) |
55 33 55 |
5 3 5 |
| Conveyor routes | 110 | 10 |
|
Dam Operating Areas (Interior) -Tunnels and underground work areas -Control Stations |
55 150 |
5 15 |
| Docks and loading platforms | 33 | 3 |
| Elevators, freight and passenger | 50 | 5 |
| Temporary Electrical Panels (Interior) | 300 | 30 |
| Temporary Electrical Panels (Exterior) | 50 | 10 |
| First-aid stations and infirmaries | 300 | 30 |
| Maintenance/operating areas/shops - vehicle maintenance shop - carpentry shop - refueling area, outdoors - shops, fine - medium detail work - welding shop |
300 110 55 540-325 300 |
30 10 5 50-30 30 |
| Mechanical/electrical equipment rooms | 110 | 10 |
| Outdoor parking areas | 33 | 3 |
| Toilets, wash, and dressing rooms | 110 | 10 |
| Visitor areas | 215 | 20 |
| Warehouses and storage rooms/areas - indoor rack storage - outdoor storage |
270 33 |
25 3 |
| Work areas – general (not listed above) | 325 | 30 |
Knowledge Check Choose the best answer for the question.
7-3. Which of the following is true if any single lighting unit fails in a work area?
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