EMERGENCY LIGHTING DESIGN GUIDE – LIGHT LEVELS

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Escape Routes (UP to 2 METRES WIDE). A fire escape route is a path that leads to a point of safety, such as a fire exit or protected stairwell in the event of an emergency or mains failure. BS5266 and CIBSE LG12. Light level. Minimum illumination level should be 1 lux along centre-line and a central band consisting of not less than half the full width to 50% of that value (0.5 Lux). Duration: 60 minutes if evacuated immediately. 180 minutes otherwise. (CIBSE LG12 states – as required for installation). Response Time: Response time should be no more than 5 seconds. Reference Plane: Finished floor level. Question Substantially wider escape routes to be treated as several 2 metre strips or be treated as an open area

EMERGENCY LIGHTING DESIGN GUIDE – SPACING TABLES

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The spacing tables show the distance from the wall or door to the first luminaire and then the distance that must not be exceeded for spacing between subsequent luminaires. This is shown for the luminaires being mounted either parallel to the route (Axial) or at right angles to the route (Transverse) for different mounting heights. In addition to values for escape routes, figures are also given for the coverage of open areas by regular arrays of luminaires. Transverse Mounting Positions

EMERGENCY LIGHTING DESIGN GUIDE – SIGNAGE

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General. BS EN 1838 :2013 Clause 5 : Required to ensure ESCAPE ROUTES are apparent from any location. Should be MAINTAINED mode where occupants may be unfamiliar with building. Should be conspicuous. The designer consider smoke accumulation when locating signs. Location. BS5499-4 :2013 Clause 4.5 states safety signs should be located : At all normal exits. At all emergency exits. Along escape routes. Anywhere else if the route to the nearest exit is not clear.