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Lighting — Construction
  • For the construction industry, OSHA sets minimum illumination standards for certain locations such as general construction areas, warehouses, corridors, exits, tunnels and underground work areas, and more.

The Occupational Safety and Health Administration (OSHA)OSHA requires in 1926.56(a) that construction areas, ramps, runways, corridors, offices, shops, and storage areas shall be lighted to not less than the minimum illumination intensities listed in Table D-3 while any work is in progress:

Table D-3—Minimum Illumination Intensities in Foot-Candles

Foot-candlesArea or Operation
5General construction area lighting.
3General construction areas, concrete placement, excavation and waste areas, accessways, active storage areas, loading platforms, refueling, and field maintenance areas.
5Indoors: warehouses, corridors, hallways, and exitways.
5Tunnels, shafts, and general underground work areas: (Exception: minimum of 10 foot-candles is required at tunnel and shaft heading during drilling, mucking, and scaling. Bureau of Mines approved cap lights shall be acceptable for use in the tunnel heading.)
10General construction plant and shops (e.g., batch plants, screening plants, mechanical and electrical equipment rooms, carpenter shops, rigging lofts and active storerooms, barracks or living quarters, locker or dressing rooms, mess halls, and indoor toilets and workrooms.)
30First aid stations, infirmaries, and offices.
Other areas. For areas or operations not covered above, employers should refer to the American National Standard A11.1-1965, R1970, Practice for Industrial Lighting, for recommended values of illumination (which is now superseded by the Illuminating Engineering Society of North America IESNA RP-7: Practice fFor Industrial Lighting).